Class Definition for Class 152 - RESILIENT TIRES AND WHEELS

Patents > Guidance, Tools, and Manuals >> Classification >>> Class Definition

Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP

You are viewing a Class definition.

CLASS 152,	RESILIENT TIRES AND WHEELS
Click here for a printable version of this file

SECTION I - CLASS DEFINITION

This class includes (1) spring wheels for land vehicles; (2) resilient tires for land vehicle wheels; (3) patches for pneumatic tires; (4) anti-skid devices for resilient tires; (5) devices for securing tires to wheels, and (6) pneumatic tire inflating devices combined with the vehicle or wheel or remaining with a particular tire between periods of inflation, or designed to fill one tire from another.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

For devices for giving a warning when the pressure within a pneumatic tire is either raised above or reduced below normal;

(a) If mechanical, see Class 116, Signals and Indicators, subclass 34. This subclass includes such devices incorporated in pneumatic tires but is not limited to devices on the tire or wheel. For devices under (a) wherein a pressure gage is combined with a valved inflation stem or valved filling chucks see Class 137, Fluid Handling, subclasses 227-246.23, and for other valves and other fluid handling devices covered with a pressure gage see subclasses 551-559, particularly subclass 557.

(b) If electrical, see Class 340, Communications: Electrical, subclass 442-448. For devices under (b) wherein the invention is in a circuit breaker, see Class 200, Electricity: Circuit Makers and Breakers, subclasses 61.22-61.26. For devices under (b) wherein the invention is in the electrical resistor combined with an inflation sensing actuator, see Class 338, Electrical Resistors, subclass 37.

SECTION III - SUBCLASS REFERENCES TO THE CURRENT CLASS

SEE OR SEARCH THIS CLASS, SUBCLASS:

337.1,	338.1, 341.1, and 342.1, and 415-431 particularly for wheels or pneumatic tires in combination with inflating valves.
429,	and 430, for devices where the invention lies solely in the connection of the valve to the tire.

SECTION IV - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

5,	Beds, appropriate subclasses for inflated pillows and mattresses.
69,	Leather Manufactures, subclass 21 for the making of leather tires.
73,	Measuring and Testing, subclasses 146 through 146.8for a pressure gauge in a tire or wheel installation, and subclasses 700-756 for a pressure gauge of general utility.
81,	Tools, appropriate subclasses for other tools specialized to use in working on and repairing tires.
137,	Fluid Handling, subclasses 223 through 234.5 for tire filling chucks and/or stems (see Lines With Other Classes, above), and subclasses 355.16-355.28 for hose holders and hoses disclosed for inflating tires.
141,	Fluent Material Handling, With Receiver or Receiver Coacting Means, appropriate subclasses for filling with gas, particularly subclass 38 for inflating tires with gas and water.
156,	Adhesive Bonding and Miscellaneous Chemical Manufacture, subclasses 110.1 through 135and 394.1-421.8 for tire making processes and apparatus, respectively.
157,	Wheelwright Machines, subclasses 1.1 and 11 for devices for applying and removing resilient tires from wheels.
222,	Dispensing, subclasses 3 through 6for means for dispensing gases including those disclosed for inflating tires but not restricted in utility thereto.
235,	Registers, subclasses 1 and 95 for mileage registers incorporated in resilient tires.
244,	Aeronautics and Astronautics, subclass 103 for resilient aircraft tires and wheels having fins, vanes, or other means to cause the wheel to be rotating when the wheels strike the ground.
251,	Valves and Valve Actuation, appropriate subclasses for valves, per se.
264,	Plastic and Nonmetallic Article Shaping or Treating: Processes, appropriate subclasses for processes within the class definition, for shaping or molding of plastic materials which may involve a vulcanization step; subclass 315 and 326 for specific processes employing a toroidal mold bag or producing a toroidal product. Apparatus for reshaping, resizing or vulcanizing a tire or tire tube is classified elsewhere.
280,	Land Vehicles, subclass 201 for combinations of inflating means with a velocipede including a modified velocipede frame as part of the combination.
295,	Railway Wheels and Axles, subclasses 11 through 14for resilient tires and wheels for railways vehicles.
305,	Wheel Substitutes for Land Vehicles, subclasses 124 through 142for spring wheels or resilient tires especially modified to be used in flexible track apparatus for land vehicles. To be placed in Class 305 the wheel as disclosed must include structure which coacts with a flexible track, such as a flanged rim or a grooved rim which structure is adapted to interengage with a portion of a flexible track. Spring wheels or resilient tires which do not incorporate such structure, even though disclosed as being flexible track supporting wheels, are classified in Class 152.
417,	Pumps, for air pumps, per se, and especially subclasses 229 through 233for combinations of an inflating pump and a vehicle which operates the pump but not operating to inflate the tire while the vehicle is in motion.
425,	Plastic Article or Earthenware Shaping or Treating: Apparatus, subclasses 28.1 through 58.1for apparatus for reshaping, resizing or vulcanizing a tire or tire tube.
428,	Stock Material or Miscellaneous Articles, appropriate subclasses for a stock material product in the form of a single or plural layer web or sheet including strips, strands or fibers, and especially subclasses 105 through 113for a composite web or sheet in which elements or constituents, (e.g., fibers, strands, etc.) in one layer are disposed at an angle to those in another layer, and subclass 114 for such a web or sheet in which a parallel relationship exists between the constituents of the layers.
492,	Roll or Roller, appropriate subclasses for a roll, per se, not elsewhere provided for, and see the notes thereunder.
520,	Synthetic Resins or Natural Rubbers, subclass 1 and indented subclasses, for tire making limited to vulcanization alone or to vulcanization with mere preparation therefor.
523,	Synthetic Resins or Natural Rubbers, subclass 166 for a composition containing a synthetic resin or natural rubber having utility as a puncture sealant for a pneumatic tire or for use in emergency repair of vehicular tires or to processes of preparing said composition.

SUBCLASSES

[List of Patents for class 152 subclass 1]

SPRING WHEELS:

This subclass is indented under the class definition. Wheels for land vehicles whereby the vehicle is resiliently supported on the roadway by means within the wheel structure other than a resilient tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151,	and 375, Note (1), for definition of a resilient tire.

2	With lubrication:
	This subclass is indented under subclass 1. The spring wheel is combined with devices for lubricating moving parts of the wheel or for oiling to prevent rusting of springs.

3	Spring enclosure:
	This subclass is indented under subclass 2. The lubricant for the spring wheel is introduced into a closed chamber containing the springs.

4	Cylinder and piston:
	This subclass is indented under subclass 2. The lubrication for the spring wheel is directed solely to cylinders and pistons therein.

[List of Patents for class 152 subclass 5]

Deformable ground engaging part:

This subclass is indented under subclass 1. Spring wheels in which the portion bearing upon the roadway yields locally under load so that the wheel as a whole does not retain its circular form.

SEE OR SEARCH CLASS:

172,	Earth Working, subclass 543 for a rolling earth working tool with spring teeth and subclass 544 for a rolling earth working tool with spring mounted teeth.
305,	Wheel Substitutes for Land Vehicles, subclass 6 for spring biased elements movably mounted on the rim of a wheel forming ground engaging feet as the wheel rotates.

6	With plural spring types:
	This subclass is indented under subclass 5. The resiliency of the spring wheel with deformable ground engaging part is provided by combined springs of different types, for example, leaf and coil.

7	With rubber spring:
	This subclass is indented under subclass 5. The resiliency of the spring wheel with deformable ground engaging part is provided by rubber or its equivalent.

8	With pneumatic spring:
	This subclass is indented under subclass 5. The resiliency of the spring wheel with deformable ground engaging part is provided by a chamber or chambers filled with fluid under pressure greater than atmospheric, whether under load or not.

[List of Patents for class 152 subclass 9]

Annular:

This subclass is indented under subclass 8. The pneumatic spring providing the resiliency of the deformable grounding engaging part of the spring wheel forms a continuous ring about the wheel center.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8,	for annular air chambers so combined with cylinders and pistons that the air of the chamber is in direct contact with the piston.

[List of Patents for class 152 subclass 10]

With air tanks:

This subclass is indented under subclass 9. The annular pneumatic spring of the spring wheel with deformable ground engaging part comprises an air chamber in free and unobstructed communication with an annular resilient tire on the wheel so that the pressure of the air in the chamber is applied to such tire. The chamber may or may not be annular. The tire may be pneumatic and the communication with the air chamber direct and continuous throughout the rim zone of the tire so that the chamber formed by the tire is combined with the air chamber to form a continuous single chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

345.1,	for similar devices constituting a sectional pneumatic tire.
155	through 166, for similar devices constituting a combined cushion and pneumatic tire.
418,	for similar devices wherein the air in the chamber is fed to the tire at reduced pressure.

[List of Patents for class 152 subclass 11]

With leaf spring:

This subclass is indented under subclass 5. The resiliency of the spring wheel with deformable ground engaging part is provided by leaf springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

253	through 260 and 270-283 for similar structure in a spring tire.

12	End secured:
	This subclass is indented under subclass 11. The leaf springs providing the resiliency of the deformable ground engaging part of the spring wheel have their inner ends positively secured in fixed relation to the wheel center. The outer ends may or may not be secured but the springs are secured at no points but their ends.

[List of Patents for class 152 subclass 13]

With coil spring:

This subclass is indented under subclass 5. The resiliency of the spring wheel with deformable ground engaging part is provided by coil springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

261	through 267, 284-299 for similar structure in a spring tire.

[List of Patents for class 152 subclass 14]

Radial:

This subclass is indented under subclass 13. The coil springs providing the resiliency of the deformable ground engaging part of the spring wheel are arranged with their axes extending radially of the axis of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

262	through 266, 289-299 for similar structure in a spring tire.

15	Cylinder and piston supported:
	This subclass is indented under subclass 14. The radial coil springs providing the resiliency of the deformable ground engaging part of the spring wheel are each combined with a cylinder and piston, the coil being either enclosed within the cylinder or encircling the assembled cylinder and piston.

16	Encircled rod supported:
	This subclass is indented under subclass 14. The radial coil springs providing the resiliency of the deformable ground engaging part of the spring wheel have rods extending through them lengthwise.

17	Spring encircling rigid annulus:
	This subclass is indented under subclass 1. Spring wheels having an annular inflexible portion which extends about the wheel outside of the springs. The springs are located radially inwardly of the annulus and resiliently support the annulus against radial motion relative to the wheel center.

[List of Patents for class 152 subclass 18]

With nonresilient overload stop:

This subclass is indented under subclass 17. The spring wheel with spring encircling rigid annulus is provided with means independent of the springs whereby radial motion of the rigid annulus relative to the wheel center is positively limited.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29,	through 39, for resilient overload stops.
158,	for overload stops inside the structure of a pneumatic tire.
165,	166 for overload stops on the outside of the structure of a pneumatic tire.

SEE OR SEARCH CLASS:

301,	Land Vehicles: Wheels and Axles, subclasses 39.1 -40.5 for overload stops associated with a pneumatic tire, but separate therefrom.

19	Convertible to rigid wheel:
	This subclass is indented under subclass 17. The spring wheel with spring encircling rigid annulus is provided with means to secure said rigid annulus rigidly to the wheel center. This converts the spring wheel into a rigid wheel and is for temporary use when springs are broken.

[List of Patents for class 152 subclass 20]

With flexible annular support:

This subclass is indented under subclass 17. The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by a flexible strap, bank, cable or chain extending about the wheel. The flexible element is not a spring in the ordinary sense of the term.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40,	47 through 52 for rubber springs extending continuously about the wheel.
56	through 68 for pneumatic springs extending continuously about the wheel.
69,	for leaf springs extending continuously about the wheel
92,	for coil springs extending continuously about the wheel.

21	Lateral thrust or tension:
	This subclass is indented under subclass 17. The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by mechanism wherein thrust or tension is applied to the springs laterally of the wheel.

22	Combined spring and friction:
	This subclass is indented under subclass 21. The lateral thrust or tension mechanism supporting the spring encircling rigid annulus comprises devices wherein friction between two moving elements is increased by spring pressure.

23	Coil springs:
	This subclass is indented under subclass 22. In a spring wheel having a spring encircling rigid annulus supported by lateral thrust or tension mechanism involving combined spring and friction devices, the springs are coil springs.

24	Double thrust:
	This subclass is indented under subclass 23. The lateral thrust or tension mechanism supporting the spring encircling rigid annulus comprises combined coil springs and friction devices so arranged that the springs are acted upon in both directions at once transversely of the wheel.

25	With coil springs:
	This subclass is indented under subclass 21. The lateral thrust or tension mechanism supporting the spring encircling rigid annulus comprises coil springs.

[List of Patents for class 152 subclass 26]

Rod encircling:

This subclass is indented under subclass 25. The lateral thrust or tension mechanism supporting the spring encircling rigid annulus comprises coil springs having rods extending through them lengthwise.

SEE OR SEARCH THIS CLASS, SUBCLASS:

25,	for such structure wherein the spring encircles the hub.

27	With balls:
	This subclass is indented under subclass 21. The lateral thrust or tension mechanism supporting the spring encircling rigid annulus comprises force transmitting balls.

[List of Patents for class 152 subclass 28]

Combined spring and friction:

SEE OR SEARCH THIS CLASS, SUBCLASS:

81,	for single end secured leaf springs wherein the free end may have some friction.

29	With plural spring types:
	This subclass is indented under subclass 17. The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by combined springs of different types, for example, rubber, leaf and coil.

30	Rubber and pneumatic:
	This subclass is indented under subclass 29. In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to rubber and pneumatic springs.

31	Rubber and leaf:
	This subclass is indented under subclass 29. In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to rubber and leaf springs.

32	Rubber and coil:
	This subclass is indented under subclass 29. In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to rubber and coil springs.

33	Annular rubber:
	This subclass is indented under subclass 32. In a spring wheel having a spring encircling rigid annulus supported by plural spring types limited to rubber and coil springs, the rubber spring forms a continuous ring about the wheel center.

34	Pneumatic and leaf:
	This subclass is indented under subclass 29. In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to pneumatic and leaf springs.

35	Pneumatic and coil:
	This subclass is indented under subclass 29. In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to pneumatic and coil springs.

36	Annular pneumatic:
	This subclass is indented under subclass 35. In a spring wheel having a spring encircling rigid annulus supported by plural spring types limited to pneumatic and coil springs, the pneumatic spring forms a continuous ring about the wheel center.

37	Leaf and coil:
	This subclass is indented under subclass 29. In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to leaf and coil springs.

38	Center secured leaf:
	This subclass is indented under subclass 37. In a spring wheel having a spring encircling rigid annulus supported by leaf and coil springs only the leaf springs have their centers positively secured in fixed relation to the rigid annulus or to the wheel center. This subclass includes leaf springs which are additionally secured at their ends.

39	End secured leaf:
	This subclass is indented under subclass 37. In a spring wheel having a spring encircling rigid annulus supported by leaf and coil springs only, the leaf springs have their opposite ends positively secured in fixed relation to the rigid annulus and the wheel center, respectively, or one end only so secured to the rigid annulus or wheel center.

[List of Patents for class 152 subclass 40]

Rubber spring:

This subclass is indented under subclass 17. The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by rubber or its equivalent. This subclass includes closed rubber chambers wherein the pressure is atmospheric.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53	through 68, for closed rubber chambers wherein the pressure is more than atmospheric.

[List of Patents for class 152 subclass 41]

In shear:

This subclass is indented under subclass 40. The rubber spring supporting the spring encircling rigid annulus in the spring wheel is so constructed and arranged that the rubber is subjected to angular distortion when the wheel is under load.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44,	through 46, for spring wheels wherein rubber block or balls are so arranged that they are placed under shear when positioned adjacent the horizontal center line of the wheel, but which take vertical thrust without shear when positioned adjacent the vertical center line.

42	Cylindrical:
	This subclass is indented under subclass 40. The rubber springs supporting the spring encircling rigid annulus in the spring wheel are cylindrical in the ordinary sense of the term and have flat ends. They may be tubular and may surround bolts or spokes.

[List of Patents for class 152 subclass 43]

Transverse:

This subclass is indented under subclass 42. The cylindrical rubber springs supporting the spring encircling rigid annulus in the spring wheel are arranged with their axes extending crosswise of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53,	for similarly constructed and arranged pneumatic springs.

44	Blocks or balls:
	This subclass is indented under subclass 40. The rubber springs supporting the spring encircling rigid annulus in the spring wheel consist of individual rubber blocks or balls as distinguished from sheets, cords or annular formations.

[List of Patents for class 152 subclass 45]

With drive:

This subclass is indented under subclass 44. In a spring wheel having a spring encircling rigid annulus supported by rubber blocks or balls, said rigid annulus is held against rotation relative to the wheel center, either by modification of wheel or spring elements or by additional means. This subclass includes drive through the springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40,	through 44, for patents wherein the drive is by means of friction, cement or vulcanization and involves no modification of wheel or spring elements.

46	With separate annulus guide:
	This subclass is indented under subclass 45. In a spring wheel having a spring encircling rigid annulus supported blocks or balls and having drive means, the rigid annulus is held against lateral movement relative to the wheel center by means other than the springs. This includes devices which hold the rigid annulus against lateral movement in one direction only.

47	Annular:
	This subclass is indented under subclass 40. The rubber spring supporting the spring encircling rigid annulus in the spring wheel forms a continuous ring about the wheel center.

[List of Patents for class 152 subclass 48]

Rigid annulus enclosing:

This subclass is indented under subclass 47. The annular rubber spring supporting the spring encircling rigid annulus in the spring wheel completely encloses said rigid annulus either by embedding or by enclosure in an annular chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

57,	for similar arrangement of an annular pneumatic spring.
251,	for similar devices wherein the spring encircling annulus is not rigid.

49	Plural:
	This subclass is indented under subclass 47. In a spring wheel having a spring encircling rigid annulus supported by an annular rubber spring, there are more than one of such springs.

50	With separate annulus guide:
	This subclass is indented under subclass 47. In a spring wheel having a spring encircling rigid annulus supported by an annular rubber spring, said rigid annulus is held against lateral movement relative to the wheel center by means other than said spring. This includes devices which hold the rigid annulus against lateral movement in one direction only.

[List of Patents for class 152 subclass 51]

Combined drive:

This subclass is indented under subclass 50. In a spring wheel having a spring encircling rigid annulus supported by an annular rubber spring and having guide means, said rigid annulus is held against rotation relative to the wheel center, either by modification of wheel or spring elements or by additional means. This subclass includes drive through the springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47,	through 50, for patents wherein the drive is by means of friction, cement or vulcanization, and involves no modification of wheel or spring elements.

[List of Patents for class 152 subclass 52]

With drive:

This subclass is indented under subclass 47. In a spring wheel having a spring encircling rigid annulus supported by an annular rubber spring, said rigid annulus is held against rotation relative to the wheel center, either by modification of wheel or spring elements or by additional means. This subclass includes drive through the spring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40,	through 42 and 47, for devices wherein the drive is by means of friction, cement or vulcanization, and involves no modification of wheel or spring elements.

[List of Patents for class 152 subclass 53]

Pneumatic spring:

This subclass is indented under subclass 17. The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by a chamber or chambers filled with fluid under pressure greater than atmospheric, whether under load or not, with the exception of ... indented hereunder, wherein the pressure may at times be atmospheric or less.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40	through 52, for spring wheels with chambers having elastic walls wherein the pressure is atmospheric.

54	Link connected:
	This subclass is indented under subclass 53. The pneumatic springs supporting the spring encircling rigid annulus in the spring wheel are combined with movable rigid links which transmit force to or from the springs. The links are usually pivotally connected to wheel or spring parts but may merely bear upon the combined parts without positive connection.

55	Cylinder and piston:
	This subclass is indented under subclass 53. The pneumatic springs supporting the spring encircling rigid annulus in the spring wheel each consists of a cylinder and piston wherein air in the cylinder cushions the piston against telescoping action.

[List of Patents for class 152 subclass 56]

Annular:

This subclass is indented under subclass 53. The pneumatic spring supporting the spring encircling rigid annulus in the spring wheel forms a continuous ring about the wheel center.

SEE OR SEARCH THIS CLASS, SUBCLASS:

55,	for annular chambers combined with cylinders and pistons.
60,	67 for such structure wherein the pneumatic spring is fixed to the rigid annulus, thereby forming a positive driving connection through the spring.
159,	161, for similar structure in a pneumatic tire.

[List of Patents for class 152 subclass 57]

Rigid annulus enclosing:

This subclass is indented under subclass 56. The annular pneumatic spring supporting the spring encircling rigid annulus in the spring wheel completely encloses said rigid annulus, either by embedding or by enclosure in an annular chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48,	for similar arrangement of an annular rubber spring.
200,	for similar devices wherein the spring encircling annulus is not rigid.

58	Plural:
	This subclass is indented under subclass 56. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, there are more than one of such springs.

[List of Patents for class 152 subclass 59]

With separate annulus guide:

This subclass is indented under subclass 56. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, said rigid annulus is held against lateral movement relative to the wheel center by means other than said spring. This includes devices which hold the rigid annulus against lateral movement in one direction only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

162	through 164, for similar structure in a pneumatic tire.

[List of Patents for class 152 subclass 60]

Combined drive:

This subclass is indented under subclass 59. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring and having guide means, said rigid annulus is held against rotation relative to the wheel center, either by modification of wheel or spring elements or by additional means. This subclass includes drive through the springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56	through 59, for such devices wherein the drive is by means of friction, cement or vulcanization and involves no modification of wheel or spring elements.

[List of Patents for class 152 subclass 61]

Spring:

This subclass is indented under subclass 60. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring with guide means and combined drive, the drive is cushioned.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30,	34, and 35, for annular pneumatic springs in combination with springs of different types which act as both support and drive springs.

62	Links:
	This subclass is indented under subclass 60. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, with guide means and combined drive, the drive consists of a link or links pivotally or flexibly connecting said rigid annulus to the wheel center.

63	Radial:
	This subclass is indented under subclass 60. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, with guide means and combined drive, the drive consists of fixed radially extending elements on the rigid annulus engaging an element on the wheel center or vice versa.

64	Studs or lugs:
	This subclass is indented under subclass 60. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, with guide means and combined drive, the drive consists of a laterally extending stud on the rigid annulus engaging an element on the wheel center of vice versa.

65	Through bolts:
	This subclass is indented under subclass 60. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, with guide means and combined drive, the drive consists of a bolt or its equivalent passing through both the rigid annulus and a part fixed to the hub or axle, one of said elements having a clearance for the bolt to allow relative radial movement between the parts.

[List of Patents for class 152 subclass 66]

Anti-creep:

This subclass is indented under subclass 60. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, with guide means and combined drive, the drive consists of interfitting irregularities of the contacting annular surfaces of the rigid annulus and the annular spring, or of irregularities upon the rigid annulus which indent the spring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

384,	for anti-creep devices to prevent creeping of pneumatic tires on their rims.

[List of Patents for class 152 subclass 67]

With drive:

This subclass is indented under subclass 56. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, said rigid annulus is held against rotation relative to the wheel center, either my modification of wheel or spring elements or by additional means. This subclass includes drive through the springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56	through 59, for such devices wherein the drive is by means of friction, cement or vulcanization and involves no modification of wheel or spring elements.

68	Anti-creep:
	This subclass is indented under subclass 67. In a spring wheel having a spring encircling rigid annulus supported by an annular pneumatic spring, with drive, the drive consists of interfitting irregularities of the contacting annular surfaces of the rigid annulus and the annular spring, or of irregularities upon the rigid annulus which indent the spring.

69	Leaf spring:
	This subclass is indented under subclass 17. The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by leaf springs.

[List of Patents for class 152 subclass 70]

With braces:

This subclass is indented under subclass 69. The leaf spring support for the spring encircling rigid annulus in the spring wheel has its springs supported intermediate their points of securement to the wheel center and said rigid annulus. The second-mentioned support may be by way of attachment of the springs to each other intermediate their length or by way of elements extending radially from the hub or rim and bearing upon the springs either laterally or circumferentially. The supports act directly upon the springs and may be either rigid or spring.

(1) Note. For leaf springs attached to each other at their ends, see this class, subclass 69.

(2) Note. For elements extending radially from the hub and bearing laterally upon the rim, see this class, subclasses 77, 78, 82, and 83.

71	Link connected:
	This subclass is indented under subclass 69. The leaf springs supporting the spring encircling rigid annulus in the spring wheel are combined with movable rigid links which transmit force to or from the springs. These links are usually pivotally connected but may merely bear upon the combined parts without positive connection.

72	Variously arranged:
	This subclass is indented under subclass 69. The leaf spring support for the spring encircling rigid annulus in the spring wheel consists of a plurality of leaf springs some of which are arranged within the wheel differently from others. The difference must be such that each spring arrangement would fall in a different subclass hereunder.

[List of Patents for class 152 subclass 73]

Cylindrical units:

This subclass is indented under subclass 69. Each of the leaf spring supports for the spring encircling rigid annulus in the spring wheel consists of one or more springs formed into an element with a substantially cylindrical periphery. This includes cylindrical springs which extend about the wheel.

(1) Note. For continuous or endless springs of irregular formation, see this class, subclass 69.

(2) Note. Compare this class, subclass 20.

74	Transverse:
	This subclass is indented under subclass 69. The leaf spring supports for the spring encircling rigid annulus in the spring wheel extend crosswise of the plane of the wheel. This includes springs extending diagonally laterally of the wheel.

75	Straight, radial or tangential:
	This subclass is indented under subclass 69. The leaf spring supports for the spring encircling rigid annulus in the spring wheel are without curvature and arranged either radially or tangentially with respect to the wheel center.

[List of Patents for class 152 subclass 76]

Center secured:

This subclass is indented under subclass 69. The leaf spring supports for the spring encircling rigid annulus in the spring wheel have their centers positively secured in the fixed relation to said rigid annulus or to the wheel center. This subclass includes leaf springs which are additionally secured at their ends.

(1) Note. For similarly secured leaf springs in a spring tire, see this class, subclasses 255 and 272.

(2) Note. For wheels wherein the springs are not positively secured in place, see this class, subclass 69.

[List of Patents for class 152 subclass 77]

With separate annulus guide:

This subclass is indented under subclass 76. In a spring wheel having a spring encircling rigid annulus supported by center secured leaf springs, said rigid annulus is held against lateral movement relative to the wheel center by means other than the springs. This includes devices which hold the rigid annulus against lateral movement in one direction only.

(1) Note. For similar structure in a pneumatic tire, see this class, subclasses 162-164.

78	Combined drive:
	This subclass is indented under subclass 77. In a spring wheel having a spring encircling rigid annulus supported by center secured leaf springs, with guide means, said rigid annulus is held against rotation relative to the wheel center by means other than said springs, or in addition thereto.

79	Reversely curved:
	This subclass is indented under subclass 76. Each of the center secured leaf spring supports for the spring encircling rigid annulus in the spring wheel is reversely curved. This subclass includes springs having straight portions.

[List of Patents for class 152 subclass 80]

End secured:

This subclass is indented under subclass 69. The leaf spring supports for the spring encircling rigid annulus in the spring wheel have their opposite ends positively secured in fixed relation to said rigid annulus and the wheel center, respectively.

(1) Note. For end secured leaf springs also secured at their centers, see this class, subclass 76 and indented subclasses.

(2) Note. For leaf springs secured to each other or to supports, see this class, subclass 70.

(3) Note. For similarly secured leaf springs in a spring tire, see this class, subclasses 256 and 273.

(4) Note. For wheels wherein the springs are not positively secured in place, see this class, subclass 69.

[List of Patents for class 152 subclass 81]

Single end:

This subclass is indented under subclass 80. The end secured leaf spring supports for the spring encircling rigid annulus in the spring wheel are fixedly secured at one end only.

(1) Note. For single end secured leaf springs also secured at their centers, see this class, subclass 76.

(2) Note. For similarly secured leaf springs in a spring tire, see this class, subclasses 257 and 274.

[List of Patents for class 152 subclass 82]

With separate annulus guide:

This subclass is indented under subclass 80. In a spring wheel having a spring encircling rigid annulus supported by end secured leaf springs, said rigid annulus is held against lateral movement relative to the wheel center by means other than said springs. This includes devices which hold the rigid annulus against lateral movement in one direction only.

(1) Note. For similar structure in a pneumatic tire, see this class, subclasses 162-164.

83	Combined drive:
	This subclass is indented under subclass 82. In a spring wheel having a spring encircling rigid annulus supported by end secured leaf springs, with guide means, said rigid annulus is held against rotation relative to the wheel center by means other than the springs or in addition thereto.

[List of Patents for class 152 subclass 84]

Oppositely curved pairs:

This subclass is indented under subclass 80. The end secured leaf spring supports for the spring encircling rigid annulus in the spring wheel are at least in part curved, and arranged in pairs wherein one spring of each pair curves oppositely from the other. This subclass includes springs having straight portions.

(1) Note. For center secured oppositely curved pairs, see this class, subclasses 76-79.

[List of Patents for class 152 subclass 85]

Reversely curved springs:

This subclass is indented under subclass 80. Each of the end secured leaf spring supports for the spring encircling rigid annulus in the spring wheel is reversely curved. This subclass includes springs having straight portions.

(1) Note. For such springs arranged in pairs with opposite curvature, see this class, subclass 84.

[List of Patents for class 152 subclass 86]

Arcuate:

This subclass is indented under subclass 80. The end secured leaf spring supports for the spring encircling rigid annulus in the spring wheel are curved from end to end substantially on an arc of a single circle.

(1) Note. For such springs arranged in pairs with opposite curvature, see this class, subclass 84.

(2) Note. For similar springs having straight portions, see this class, subclasses 80-83.

87	Coil spring:
	This subclass is indented under subclass 17. The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by coil springs. The term "coil" is used to include coil, helical and volute springs.

[List of Patents for class 152 subclass 88]

Link connected:

This subclass is indented under subclass 87. The coil springs supporting the spring encircling rigid annulus in the spring wheel are combined with movable rigid links which transmit force to or from the springs. These links are usually pivotally connected to wheel or spring parts but may merely bear upon the combined parts without positive connection. The links are located outside of the springs as distinguished from spring encircled links.

(1) Note. For spring encircled links, see this class, subclasses 103 and 104.

[List of Patents for class 152 subclass 89]

Variously arranged:

This subclass is indented under subclass 87. The coil spring support for the spring encircling rigid annulus in the spring wheel consists of a plurality of coil springs, some of which are arranged within the wheel differently from others. The difference must be such that each spring arrangement would fall in a different subclass hereunder.

(1) Note. For coil drive springs arranged differently from supporting springs, see this class, subclasses 101, 104 and 107.

[List of Patents for class 152 subclass 90]

Tangential and radial:

This subclass is indented under subclass 89. The coil spring support for the spring encircling rigid annulus in the spring wheel consists of a plurality of springs, some of the springs being arranged with their axes extending tangentially to the axis of the wheel and the remainder of the springs being arranged with their axes extending radially of the axis of the wheel.

(1) Note. For tangential drive springs, see this class, subclasses 101, 104 and 107.

91	Diagonal:
	This subclass is indented under subclass 87. The coil springs supporting the spring encircling rigid annulus in the spring wheel have their axes extending diagonally laterally of the wheel.

92	Circumferential:
	This subclass is indented under subclass 87. The coil springs supporting the spring encircling rigid annulus in the spring wheel have their axes extending circumferentially of the wheel, arcuately parallel to the wheel periphery.

93	Tangential:
	This subclass is indented under subclass 87. The coil springs supporting the spring encircling rigid annulus in the spring wheel are arranged with their axes extending tangentially to the axis of the wheel.

94	Transverse:
	This subclass is indented under subclass 87. The coil springs supporting the spring encircling rigid annulus in the spring wheel are arranged with their axes extending crosswise of the wheel.

95	Center secured:
	This subclass is indented under subclass 94. The transverse coil springs supporting the spring encircling rigid annulus in the spring wheel are constructed and arranged so that one end of the spring is supported at or adjacent the axis of the spring coil.

96	Concentric with wheel axis:
	This subclass is indented under subclass 94. The title defines the subclass.

97	Radial:
	This subclass is indented under subclass 87. The coil springs supporting the spring encircling rigid annulus in the spring wheel are arranged with their axes extending radially of the axis of the wheel.

98	Tandem, interposed bearing:
	This subclass is indented under subclass 97. The radial coil spring supporting the spring encircling rigid annulus in the spring wheel consist of sets of two or more springs, one spring of each set being arranged radially outwardly of another with a fixed bearing between their adjacent ends. The bearing may be fixed with relation to either the rigid annulus or the wheel center.

99	Telescoping cylinder supported:
	This subclass is indented under subclass 97. The radial coil springs supporting the spring encircling rigid annulus in the spring wheel are each combined with cylinders which telescope one within another, the coil being either enclosed within the cylinders or encircling the assembled cylinders.

100	Cylinder and piston supported:
	This subclass is indented under subclass 97. The radial coil springs supporting the spring encircling rigid annulus in the spring wheel are each combined with a cylinder and piston, the coil being either enclosed within the cylinder or encircling the assembled cylinder and piston.

101	With separate drive:
	This subclass is indented under subclass 100. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs with cylinders and pistons, said rigid annulus is held against rotation relative to the wheel center by means other than the springs, cylinders and pistons, or in addition to such springs, cylinders or pistons.

[List of Patents for class 152 subclass 102]

102

Double acting:

This subclass is indented under subclass 100. In a spring wheel with cylinder and piston supported radial coil springs supporting a spring encircling rigid annulus the construction and arrangement is such that each spring acts both in compression and tension. In another species included in this subclass the springs are limited to compression or tension but act whether the local space between the rigid annulus and the wheel center is increased or decreased, that is, they act whether at the temporary top or bottom of the wheel.

(1) Note. Compare this class, subclass 98.

103	Encircled rod supported:
	This subclass is indented under subclass 97. The radial coil springs supporting the spring encircling rigid annulus in the spring wheel have rods or links extending through them lengthwise.

104	With independent annulus guide and drive:
	This subclass is indented under subclass 103. In a spring wheel having a spring encircling rigid annulus supported by radial rod encircling coil springs, the rigid annulus is held against lateral movement relative to the wheel center by means other than the rods and springs and is held against rotation relative to the wheel center by means other than the rods and springs, or in addition to such rods and springs.

[List of Patents for class 152 subclass 105]

105

With separate annulus guide:

This subclass is indented under subclass 97. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, said rigid annulus is held against lateral movement relative to the wheel center by means other than the springs. This includes devices which hold the rigid part against lateral movement in one direction only.

(1) Note. For similar structure in a pneumatic tire, see this class, subclasses 162-164.

106	Combined drive:
	This subclass is indented under subclass 105. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, with guide means, said rigid annulus is held against rotation relative to the wheel center by means other than said springs, or in addition thereto.

[List of Patents for class 152 subclass 107]

107

Spring:

This subclass is indented under subclass 106. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, with guide means and combined drive, the drive is cushioned.

(1) Note. For radial coil springs in combination with differently arranged coil springs which act as both support and drive springs, see this class, subclasses 89 and 90.

(2) Note. For radial coil springs in combination with springs of different type which act as both support and drive springs, see this class, subclasses 32, 35 and 37-39.

(3) Note. For tangential coil springs which act as both support and drive springs, see this class, subclass 93.

(4) Note. For circumferential coil springs which act as both support and drive springs, see this class, subclass 92.

108	Links:
	This subclass is indented under subclass 106. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, with guide means and combined drive, the drive consists of a link or links pivotally or flexibly connecting said rigid annulus to the wheel center.

109	Radial:
	This subclass is indented under subclass 106. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, with guide means and combined drive, the drive consists of fixed radially extended elements on the rigid annulus engaging an element on the wheel center, or vice versa.

110	Studs or lugs:
	This subclass is indented under subclass 106. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, with guide means and combined drive, the drive consists of a laterally extending projection on the rigid annulus engaging an element on the wheel center, or vice versa.

111	Through bolts:
	This subclass is indented under subclass 106. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, with guide means and combined drive, the drive consists of a bolt or its equivalent passing through both the rigid annulus and a part fixed to the hub or axle, one of said parts having a clearance for the bolt to allow relative radial movement between the parts.

112	With separate drive:
	This subclass is indented under subclass 97. In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, said rigid annulus is held against rotation relative to the wheel center by means other than the springs, or in addition thereto.

[List of Patents for class 152 subclass 151]

151

TIRES, RESILIENT:

This subclass is indented under the class definition. Devices for application outside the periphery of that fixed rigid element of a land vehicle wheel generally known as a rim or tire, to absorb road shocks.

(1) Note. Any combinations of spring wheel and resilient tire will be found in this class, under "Spring wheels", subclasses 1-112.

(2) Note. For resilient tires specially adapted for use with railway vehicles, see Class 295, Railway Wheels and Axles, subclass 11 and indented subclasses.

(3) Note. Nonresilient tires are in Class 301, Land Vehicles: Wheels and Axles, subclass 86 and indented subclasses.

(4) Note. For a rolling earth working tool with a yieldable rim see Class 172, Earth Working, subclass 519.

[List of Patents for class 152 subclass 152]

152

Emergency:

This subclass is indented under subclass 151. Resilient tires constructed and arranged for rapid and convenient manual application upon a rim to replace temporarily the ordinary tire. These are usually cushion tires intended to replace temporarily punctured pneumatic tires.

(1) Note. For circumferentially adjustable securing means to bind the tire on the rim, see this class, subclasses 279, 283, 307, 388, and indented subclasses, and 399.

(2) Note. For tires constructed and arranged for use with or in addition to the ordinary tire for emergency purposes, see Class 301, Land Vehicles: Wheels and Axles, subclasses 39.1+.

152.1

With electrical conducting means:

This subclass is indented under subclass 151. Subject matter wherein means are provided integral or permanently associated with the resilient tire in order to conduct an electrical current in, on or through the resilient tire.

(1) Note. The electrical conducting means may possess heat dissipating characteristics.

SEE OR SEARCH THIS CLASS, SUBCLASS:

153,	for resilient tires with cooling devices and subclass 521 for a pneumatic tire with means enabling restricted operation in damaged or deflated condition which is further provided with internal lubrication or cooling.
,

[List of Patents for class 152 subclass 153]

153

With cooling devices:

This subclass is indented under subclass 151. Structure built into the tire or wheel and arranged to cool the tire when in use.

(1) Note. For brake cooling devices, see Class 301, Land Vehicles: Wheels and Axles, subclasses 6.1+.

[List of Patents for class 152 subclass 154]

154

With splash guards:

This subclass is indented under subclass 151. Resilient tires having devices integral therewith or permanently attached thereto for preventing the tire from splashing mud or water.

(1) Note. For splash guards attached to the wheel or rim, see Class 280, Land Vehicles, subclass 156.

154.1

With balancing feature:

This subclass is indented under subclass 151. Subject matter wherein the resilient tire is provided with means integral therewith or permanently associated therewith or attached thereto for statically or dynamically balancing the resilient tire.

SEE OR SEARCH CLASS:

156,	Adhesive Bonding and Miscellaneous Chemical Manufacture, subclass 75 for surface bonding processes involving balancing of the resultant product.
301,	Land Vehicles: Wheels and Axles, subclasses 5.21+ for a balancing device for a vehicle wheel.

154.2	With wear indicating feature:
	This subclass is indented under subclass 151. Subject matter wherein the resilient tire is provided with means integral therewith or attached thereto to indicate tire abrasion, (e.g., by abrasion of specified tire portion or material.

155	Cushion and pneumatic combined:
	This subclass is indented under subclass 151. The tire comprises both cushion tire features and pneumatic tire features.

[List of Patents for class 152 subclass 156]

156

Metallic spring cushion:

This subclass is indented under subclass 155. The cushion feature comprises metal springs.

(1) Note. For metallic spring cushion tires, per se, see this class, subclass 247 and indented subclasses.

[List of Patents for class 152 subclass 157]

157

Enclosed cushion:

This subclass is indented under subclass 155. The cushion tire feature of the combined cushion and pneumatic tire is completely enclosed.

(1) Note. For tires embodying an enclosed cushion, but without the pneumatic feature, see this class, subclass 310 and indented subclasses.

[List of Patents for class 152 subclass 158]

158

Internal buffers:

This subclass is indented under subclass 157. Protruding into the chamber constituting the pneumatic means is an element which takes the load only when the pneumatic means is deflated or is distorted beyond the normal amount, such as by hitting a rock or other obstruction.

(1) Note. For devices for the same purpose on the exterior of the tire, see this class, subclasses 165 and 166.

(2) Note. For devices for the same purpose separate from the tire and attached to the wheel, see Class 301, Land Vehicles: Wheels and Axles, subclasses 39.1+.

[List of Patents for class 152 subclass 159]

159

Superimposed:

This subclass is indented under subclass 155. The cushion means and the pneumatic means are superimposed upon each other radially of the wheel but are not united by vulcanization or equivalent means, and neither encloses the other.

(1) Note. See this class, subclasses 175 and indented subclasses, and 187 and indented subclasses.

160	Plungers:
	This subclass is indented under subclass 159. Independent tread elements project through a rigid element and are superimposed upon pneumatic means to reciprocate under load.

[List of Patents for class 152 subclass 161]

161

Edge-secured cushion:

This subclass is indented under subclass 159. The cushion means is located radially outwardly of the pneumatic means and its edges are secured to the wheel so that the cushion reciprocates in its middle zone only, under load.

SEE OR SEARCH THIS CLASS, SUBCLASS:

164,	327 and 345.1

162	Guide flanges:
	This subclass is indented under subclass 159. The cushion means is located radially outwardly of the pneumatic feature and is guided by flanges so that it reciprocates under load. A plurality of cushion means may be present. The flanges may be on either the wheel or the cushion means. They hold the cushion against lateral displacement and may be the sole means securing the tread to the wheel.

163	Radial stops:
	This subclass is indented under subclass 162. Stops are provided which limit the radial reciprocal movement of the cushion feature.

[List of Patents for class 152 subclass 164]

164

Bolts or studs:

This subclass is indented under subclass 163. Bolts or studs are provided to act as stops against radial or circumferential movement of the cushion means, or against both.

SEE OR SEARCH THIS CLASS, SUBCLASS:

161,	for edge-secured cushion means.

[List of Patents for class 152 subclass 165]

165

Integral:

This subclass is indented under subclass 155. Inventions in which all elements of the tire proper are united by vulcanization or equivalent means, such as cementing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

158,	for internal buffers.

[List of Patents for class 152 subclass 166]

166

With removable inner tube:

This subclass is indented under subclass 165. The integral tire is provided with, or obviously intended for use with, a removable inner tube, and encloses at least the tread and side walls thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

158,	for internal buffers.

TIRES, RESILIENT, Armored:

This subclass is indented under subclass 151. The tire is provided with devices protecting all or substantially all of the tread portion of the tire against wear or puncture. Where the device is sectional, the sections must substantially abut or be directly connected to each other by their own integral elements, or overlap, or be external and so thick as to raise the tire body above ordinary danger of puncture.

(1) Note. For analogous body armor, see Class 89, Ordnance, subclass 36.09 and see the notes thereto for other armor.

[List of Patents for class 152 subclass 167]

167

Anti-skid:

This subclass is indented under the unnumbered subclass, Armored. Devices protecting all or substantially all of the tread portion of the tire against wear or puncture, either integral with the tire or applied thereto, and so constructed and arranged as to tend to prevent slipping or skidding of the tire on the roadway, and performing the anti-skid function either alone or in combination with other elements. Anti-skid armor is necessarily wholly or partially external.

(1) Note. For similar anti-skid devices which do not fall within the definition of armor, see this class, subclass 208 and indented subclasses.

SEE OR SEARCH CLASS:

428,

Stock Material or Miscellaneous Articles, subclasses 98+ for a single or plural layer stock material product which is structurally defined (e.g., size or shape) and subclasses 221+ for such a product having a component or element which is structurally defined (e.g., size, arrangement, shape); and subclass 911 (a cross-reference art collection) for a product having a penetration resistant layer.

[List of Patents for class 152 subclass 168]

168

Radial filaments and laminations:

This subclass is indented under subclass 167. The anti-skid armor comprises fibers, cords, wires or fabric extending radially or substantially radially of the tire as viewed in lateral section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

212,	for similar subject matter.

[List of Patents for class 152 subclass 169]

169

Secured into casing:

This subclass is indented under subclass 167. The anti-skid armor, being external, is secured to the tire by means of rivets, bolts or the like extending into or through the tire casing, or a portion of the armor itself is embedded in the casing.

(1) Note. For anti-skid devices with embedded anti-skid for use with footwear, see Class 36, Boots, Shoes, and Leggings, subclass 59 and indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

210,	211 and 222, for similar subject matter.

170	Detachable:
	This subclass is indented under subclass 167. The anti-skid armor is detachable from the tire. This subclass consists principally of woven metal anti-skid armor.

[List of Patents for class 152 subclass 171]

171

Linked mat:

This subclass is indented under subclass 170. The detachable anti-skid armor consists of either open or imperforate metal links connected to each other directly or by rods or cables in the nature of hinge pintles. The mat must extend for more than one link laterally of the wheel.

(1) Note. For the metal linked mat, see this class, subclass 201.

(2) Note. For detachable anti-skid armor consisting of links, and of single-link width, see this class, subclass 178 and indented subclasses.

[List of Patents for class 152 subclass 172]

172

Tire secured:

This subclass is indented under subclass 171. The linked mat detachable anti-skid armor is secured to the wheel by intermediation of the tire, having no direct connection to the wheel, felly, or rim.

(1) Note. For the metal linked mat, see this class subclass 201.

(2) Note. For the securing means, see this class, subclasses 175, and indented subclasses 179, 182 and indented subclasses 187 and indented subclasses 191, 225 and indented subclasses, 233, 241 and 242.

173	With circumferential band:
	This subclass is indented under subclass 170. The detachable anti-skid armor comprises a nonsectional band which extends continuously about the major circumference of the tire. This band may be split. This subclass consists principally of such armor secured to the wheel, felly, or rim.

[List of Patents for class 152 subclass 174]

174

Bound to felly:

This subclass is indented under subclass 173. The detachable anti-skid armor with circumferential band is secured to the wheel by means of a binding or strap around the felly.

(1) Note. For the securing means, see this class, subclasses 181, 186, 190, 220- 230, 237, and 373.

[List of Patents for class 152 subclass 175]

175

Tire secured:

This subclass is indented under subclass 173. The detachable anti-skid armor with circumferential band is secured to the wheel by intermediation of the tire, having no direct connection with the wheel, felly, or rim.

(1) Note. See this class, subclasses 159 and 187 and indented subclasses.

(2) Note. For the securing means, see this class, subclasses 172, 179, 182, 183, 187, 188, and 191.

[List of Patents for class 152 subclass 176]

176

Inlaid tread:

This subclass is indented under subclass 175. The detachable anti-skid armor comprises a band constituting a tread and wholly or partially inlaid in a groove or grooves in tread zone of the casing.

(1) Note. For the securing means, see this class, subclasses 172, 179, 182, and indented subclasses 191, 225 and indented subclasses, 233 and 241.

[List of Patents for class 152 subclass 177]

177

With securing rings:

This subclass is indented under subclass 175. The tire secured detachable anti-skid armor with circumferential band is held to the tire by rings of smaller diameter than the tire tread, which rings are not secured to the wheel or tire but extend about the wheel at each side of the tread with the anti-skid armor attached thereto. The ring may be sectional but does not include any part of the armor. This subclass includes rings consisting entirely of chain.

(1) Note. For the securing means, see this class, subclasses 172, 179, 184, 189, 191, 225 and indented subclasses, and 242.

[List of Patents for class 152 subclass 178]

178

Sectional:

This subclass is indented under subclass 170. The detachable anti-skid armor is sectional. The sections must substantially abut, or be directly connected to each other by their own integral elements, or overlap, or be so thick as to raise the tire above ordinary danger of puncture.

(1) Note. For similar anti-skid devices which do not fall within the definition of armor, see this class, subclass 208 and indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

189,	for secured rings.

[List of Patents for class 152 subclass 179]

179

Tire secured:

This subclass is indented under subclass 178. The sectional detachable anti-skid armor is held to the wheel by intermediation of the tire, having no direct connection with the wheel, felly or rim.

(1) Note. For the securing means, see this class, subclasses 172, 175 and indented subclasses, 182 and indented subclasses 187 and indented subclasses, 191, 225 and indented subclasses, 233, 241, and 242.

(2) Note. For similar structures where the armor is wholly metallic, see this class, subclass 182 and indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

191,	for sectional external armor.

[List of Patents for class 152 subclass 180]

180

Wholly metallic:

This subclass is indented under subclass 178. The sectional detachable anti-skid armor itself comprises no material but metal. The securing means may be of other materials.

SEE OR SEARCH THIS CLASS, SUBCLASS:

190,	for sectional external armor.

[List of Patents for class 152 subclass 181]

181

Bound to felly:

This subclass is indented under subclass 180. The wholly metallic sectional detachable anti-skid armor is secured to the wheel by means of a binding or strap around the felly.

(1) Note. For the securing means, see this class, subclasses 174, 186, 190, 220- 230, 237, and 373.

[List of Patents for class 152 subclass 182]

182

Tire secured:

This subclass is indented under subclass 179. The wholly metallic sectional detachable anti-skid armor is held to the wheel by intermediation of the tire, having no direct connection with the wheel, felly or rim.

(1) Note. For the securing means, see this class, subclasses 172, 175, 176, 179, 183, 187, 188, 225, and indented subclasses, 233, and 241.

[List of Patents for class 152 subclass 183]

183

Corner-connected sections:

This subclass is indented under subclass 182. The wholly metallic sectional detachable anti-skid armor is bound to the tire (generally by inflation expansion of the tire within the armor), the adjacent armor sections being connected to each other at, or close to, their corners only, to form a circular series of sections. The connection may be direct or by means of links.

(1) Note. For the securing means, see this class, subclasses 179 and 191.

[List of Patents for class 152 subclass 184]

184

With securing rings:

This subclass is indented under subclass 182. The tire secured wholly metallic sectional detachable anti-skid armor is held to the tire by rings of smaller diameter than the tire tread, which rings are not secured to the wheel or tire, but extend about the wheel at each side of the tread with the anti-skid armor attached thereto. The ring may be sectional but does not include any part of the armor. This subclass includes rings consisting entirely of chain.

(1) Note. For the securing means, see this class, subclasses 172, 177, 179, 189, 191, 225, and indented subclasses, and 242.

[List of Patents for class 152 subclass 185]

185

External:

This subclass is indented under the unnumbered subclass, Armored. External devices protecting all or substantially all of the tread portion of the tire against wear or puncture, either integral with the tire or applied.

(1) Note. See also this class, subclass 53 and indented subclasses, for annular external armor which is rigid and forms an outer rim.

185.1

Track for single wheel:

This subclass is indented under subclass 185. Apparatus comprising either (a) one or more endless members having traction enhancing portions thereon, or (b) an endless member made up of a plurality of parts at least some of which having traction enhancing portions thereon, the member or members closely surrounding the tire about its periphery.

(1) Note. A tire having a track or tread member as either an integral part thereof or otherwise being rigidly connected thereto even though separable therefrom is not deemed proper for classification here. Such devices are found in other subclasses in (this class,Class 152), especially subclasses 170-184.

[List of Patents for class 152 subclass 186]

186

Bound to felly:

This subclass is indented under subclass 185. The external armor is secured to the wheel by means of a binding or strap around the felly.

(1) Note. For the securing means, see this class, subclasses 174, 181, 190, 220- 230, 237, and 373.

[List of Patents for class 152 subclass 187]

187

Tire secured:

This subclass is indented under subclass 185. The external armor is held to the wheel by intermediation of the tire, having no direct connection to the wheel, felly, or rim.

(1) Note. See this class, subclasses 159 and 175 and indented subclasses.

(2) Note. For the securing means, see this class, subclasses 172, 175, 179, 182, 183, 191, 225, and indented subclasses, 233, and 241.

(3) Note. For sectional external armor, see this class, subclass 191.

[List of Patents for class 152 subclass 188]

188

Inlaid tread:

This subclass is indented under subclass 187. The tire secured external armor comprises a band constituting a tread and wholly or partially inlaid in a groove or grooves in the tread zone of the casing.

(1) Note. For the securing means, see this class, subclasses 172, 176, 179, 182, and indented subclasses, and 191.

[List of Patents for class 152 subclass 189]

189

With securing rings:

This subclass is indented under subclass 187. The tire secured external armor is held to the tire by rings of smaller diameter than the tire tread which rings are not secured to the wheel or tire but extend about the wheel at each side of the tread with the armor attached thereto. The ring may be sectional but does not include any part of the armor. This subclass includes rings consisting entirely of chain.

(1) Note. For the securing means, see this class, subclasses 172, 177, 179, 184, 191, 225, and indented subclasses, and 242.

[List of Patents for class 152 subclass 190]

190

Sectional:

This subclass is indented under subclass 185. The external armor is sectional. The sections must substantially abut, or be directly connected to each other by their own integral elements, or overlap.

(1) Note. For sections so far separated as not to protect the entire tire tread, see this class, subclass 225 and indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

178,	180 and 181, for similar subject matter.

[List of Patents for class 152 subclass 191]

191

Tire secured:

This subclass is indented under subclass 190. The sectional external armor is secured to the wheel by intermediation of the tire, having no direct connection to the wheel, felly, or rim.

(1) Note. For the securing means, see this class, subclasses 172, 175 and indented subclasses, 179, 182 and indented subclasses, 187 and indented subclasses, 225 and indented subclasses, 233, 241, and 242.

SEE OR SEARCH THIS CLASS, SUBCLASS:

179,

[List of Patents for class 152 subclass 192]

192

Single tube tires internal:

This subclass is indented under the unnumbered subclass, Armored. The tire armor is an element of a single tube tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:

196,	and 197 for armor embedded in casing construction.

[List of Patents for class 152 subclass 193]

193

Metal:

This subclass is indented under subclass 192. The single tube tire armor comprises metal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

198,	200, 201, 202, and 205 and indented subclasses.

SEE OR SEARCH CLASS:

428,

Stock Material or Miscellaneous Articles, subclass 411 .1-704 for a stock material product in the form of a plural layer web or sheet, but not structurally defined, and which may have a metal layer; and especially subclasses 457-472.3 for such a plural layer product including a metal layer next to a non-metal layer.

[List of Patents for class 152 subclass 194]

194

Plates:

This subclass is indented under subclass 193. The single tube tire armor comprises metal plates.

SEE OR SEARCH THIS CLASS, SUBCLASS:

199,	for casing embedded armor.

[List of Patents for class 152 subclass 195]

195

Inner tube construction:

This subclass is indented under the unnumbered subclass, Armored. The tire armor is an element of the inner tube construction. The armor may be embedded in the body of the tube or be secured to its surface.

(1) Note. For reinforced inner tubes, see this class, subclasses 510+.

[List of Patents for class 152 subclass 196]

196

Casing construction:

This subclass is indented under the unnumbered subclass, Armored. The tire armor is an element of the casing construction. This subclass consists of armor secured to the inner surface of the casing, principally.

(1) Note. If secured to the outer surface, see this class, subclass 185 and indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

192,	and indented subclasses.

[List of Patents for class 152 subclass 197]

197

Embedded:

This subclass is indented under subclass 196. The armor is embedded in the body of the casing of the tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:

192,

[List of Patents for class 152 subclass 198]

198

Metal:

This subclass is indented under subclass 197. The casing embedded armor comprises metal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

193,	205 and 206 for pertinent subject matter.

SEE OR SEARCH CLASS:

428,

[List of Patents for class 152 subclass 199]

199

Plates:

This subclass is indented under subclass 198. The casing embedded armor comprises metal plates. These may extend from bead to bead.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194,	205 and 206 for pertinent subject matter.

[List of Patents for class 152 subclass 200]

200

Annular:

This subclass is indented under subclass 198. The casing embedded armor comprises a flexible annular metal element extending about the major circumference of the tire. Such elements may be transversely split.

(1) Note. For rigid wheel encircling hands embedded within a pneumatic tire, see this class, subclass 57.

SEE OR SEARCH THIS CLASS, SUBCLASS:

193,	and 207 for pertinent subject matter.

[List of Patents for class 152 subclass 201]

201

Linked mat:

This subclass is indented under subclass 198. The casing embedded armor comprises either open or imperforate metal links connected to each other either directly or by rods or cables in the nature of hinge pintles. The mat must extend for more than one link laterally of the wheel.

(1) Note. For the metal linked mat, see this class, subclasses 171 and 172.

SEE OR SEARCH THIS CLASS, SUBCLASS:

193,	and 205 for pertinent subject matter.

[List of Patents for class 152 subclass 202]

202

Woven:

This subclass is indented under subclass 198. The casing embedded armor is composed of woven fabric comprising metal strands.

SEE OR SEARCH THIS CLASS, SUBCLASS:

193,	and 205 for pertinent subject matter.

[List of Patents for class 152 subclass 203]

203

Interliners:

This subclass is indented under the unnumbered subclass, Armored. The tire armor is a readily removable separate annular element extending about the major circumference of the tire and interposed between the inner tube and casing. This is generally known as a "liner" or "interliner".

(1) Note. For such armor permanently secured to the outer surface of the inner tube, see this class, subclass 195.

(2) Note. For such armor permanently secured to the inner surface of the casing, see this class, subclass 196.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371,	and indented subclasses.

[List of Patents for class 152 subclass 204]

204

Cotton, fabric, or rubber:

This subclass is indented under subclass 203. The tire armoring interliner is composed of cotton fabric or rubber or both. Since cotton fabric is conventional in pneumatic tires, this subclass includes such patents as mention fabric without specifying the material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371,	and indented subclasses.

[List of Patents for class 152 subclass 205]

205

Metal:

This subclass is indented under subclass 203. The interliner comprises metal as an armoring element. This subclass consists of plate armor, principally.

(1) Note. See this class, subclasses 193, 194, 198, 199, 201, and 202.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371,	and indented subclasses.

SEE OR SEARCH CLASS:

428,

Stock Material or Miscellaneous Articles, subclasses 411+ for a stock material product in the form of a plural layer web or sheet, but not structurally defined, and which may have a metal layer; and especially subclasses 457+ for such a plural layer product including a metal layer next to a nonmetal layer.

[List of Patents for class 152 subclass 206]

206

Scale armor:

This subclass is indented under subclass 205. The tire armoring metal interliner comprises plates overlapping in fish-scale fashion, either longitudinally or laterally.

(1) Note. See this class, subclasses 194 and 199.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371,	and indented subclasses.

[List of Patents for class 152 subclass 207]

207

Annular:

This subclass is indented under subclass 205. The tire armoring interliner comprises a metal annulus. This may be split.

(1) Note. See this class, subclasses 193 and 200.

[List of Patents for class 152 subclass 208]

208

Anti-skid devices:

This subclass is indented under subclass 151. Devices arranged upon a tire so as to give with the flexure of the tire and so constructed and arranged as to tend to prevent slipping or skidding of the tire on the roadway.

(1) Note. For anti-skid devices in combination with or forming tire armor, see this class, subclass 167 and indented subclasses. See the definition of Tires, resilient, Armored, following subclass 166.

(2) Note. For anti-skid devices for use with footwear, see Class 36, Boots, Shoes, and Leggings, subclasses 7.6, 7.7, and 59 and indented subclasses.

(3) Note. For anti-slipping pulleys, see Class 474, Endless Belt Power Transmission Systems or Components, particularly subclasses 177+ and 190+ for pulleys with a material on the belt-engaging surface which may be effective to reduce slippage.

(4) Note. For anti-skid devices attached to portions of the vehicle which do not rotate with the wheel, see Class 188, Brakes, subclasses 4, 5 and 6.

(5) Note. For traction mats which facilitate extraction of motor driven vehicles when stalled in mud or sand, see Class 238, Railways: Surface Track, subclass 14.

(6) Note. For anti-skid devices which do not give with the flexure of the tire, see Class 301, Land Vehicles: Wheels and Axles, subclasses 41.1+.

(7) Note. See Class 305, Wheel Substitutes for Land Vehicles, appropriate subclasses for flexible tracks for land vehicles. Class 305 takes devices where the sole specific disclosure or a claim is directed to an anti-skid device which is adapted to be trained about a pair of longitudinally spaced resilient tires and intended to operate as a flexible track apparatus.

(8) Note. See Class 520, Synthetic Resins or Natural Rubbers, appropriate subclasses, particularly Class 523, subclass 152 for a composition containing a synthetic resin or natural rubber having utility as a friction element for automobiles, trains, trailers, roller skates, skateboards, or other wheeled vehicles or to processes of preparing said composition.

209.1

Tread:

This subclass is indented under subclass 208. Devices wherein the tread of the tire constitutes the anti-skid device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324,	325, for cushion tires having recesses which are inherently anti-skid. Recesses in the tire tread, primarily to increase tire resilience, are in subclasses 324 and 325.

SEE OR SEARCH CLASS:

D12,	Transportation, subclasses 500 through 603for ornamental designs for tire tread.

209.2	For controlling noise by varying design cycle (e.g., specified pitch ratio, pitch sequence, etc.):
	This subclass is indented under subclass 209.1. Tread having at least two different pitches, for regulating noise generated when a tire surface contacts a road surface.

209.3	Having varying tread characteristic (e.g., groove depth, groove angle, etc.) other than design cycle
	This subclass is indented under subclass 209.2. Tread having a tread characteristic varying in proportion to pitch.

209.4

Containing randomly dispersed short fibers or anti-skid granules:

This subclass is indented under subclass 209.1. Tread having randomly dispersed short fibers or anti-skid granules throughout at least the upper tread surface.

(1) Note. Granules may be disclosed as particles, short fibers, or anti-skid granules. Fillers such as carbon black and silica are not considered proper for placement in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

210,	for anti-skid elements, nonrandomly embedded therein or anti-skid elements, per se, when it is disclosed that they are for use in a tire.

209.5	Having tread sections (e.g., base-cap, etc.) containing different specified physio-chemical properties (e.g., hysteresis, modulus, hardness, etc.) or compositions:
	This subclass is indented under subclass 209.1. Tread having at least one section with specified physio-chemical properties or compositions which are different from specified physio-chemical properties or compositions of another section.

209.6	Including retread or precured tread section:
	This subclass is indented under subclass 209.5. Tread wherein at least one section is precured or is retread.

209.7	Including foam section:
	This subclass is indented under subclass 209.5. Tread wherein at least one section has randomly dispersed pores or voids.

209.8	Having asymmetric tread pattern:
	This subclass is indented under subclass 209.1. Tread having a pattern on one side of the equatorial plane of a tire which is not a mirror image of the tread pattern on the other side of the equatorial plane of said tire.

209.9	Characterized by different groove widths:
	This subclass is indented under subclass 209.8. Tread having groove widths on one side of the equatorial plane of a tire that are dissimilar to groove widths on the other side of the equatorial plane of said tire.

209.11

For sidewall-running tires (e.g., unicycle, motorcycle, bicycle, etc.):

This subclass is indented under subclass 209.1. Tread which, when measured laterally, is identified as the axial distance across a tire, below the opposite shoulders, to include at least a portion of said tire"s sidewall.

(1) Note. This subclass contains treads which wrap laterally around a tire, below the opposing shoulders of said tire, to include at least a portion of said tire"s sidewall.

209.12

Containing lugs having or appearing to have net to gross ratios of 35 percent or less (e.g., farm equipment, tractor tire, etc.):

This subclass is indented under subclass 209.1. Tread having or appearing to have relatively few extremely large blocks (i.e., lugs) arranged across a tire surface such that a ratio of the area of the large block surface (i.e., net) to the overall tire surface area (i.e., gross) is equal to or less than 0.35 to 1.0 or a net to gross of 35% or less.

(1) Note. In some prior art, the net to gross ratios are not specified. In these situations, the description or drawings are reviewed to determine if the criteria hereinabove set forth seem to have been met. If the criteria seem met, placement will be proper for this subclass.

209.13	Having circumferential rib at or crossing equatorial plane:
	This subclass is indented under subclass 209.12. Tread having a circumferential rib at or crossing the equatorial plane of a tire.

209.14

Having tire tread profile defined by diverse radii of curvature:

This subclass is indented under subclass 209.1. Tread having a tire surface curvature represented by radii which have different magnitudes or origins.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324,	325, and 454, for cushion tires having external shape characteristics other than anti-skid tread surface tires.

209.15

Characterized by shape of upper surface of tread element (e.g., block with upper convex surface, etc.):

This subclass is indented under subclass 209.1. Tread having the shape of the upper surface of a tread element (i.e., surface of tread element intended to contact road) specified.

SEE OR SEARCH THIS CLASS, SUBCLASS:

209.14,

for tread elements having their upper surface defined only by the radius of curvature or the tread.

209.16	Having specified tread shoulder structure:
	This subclass is indented under subclass 209.1. Tread having a specified structure for an outside portion of the tread which lies below the tread surface and above the beginning of a sidewall section of a tire (i.e., shoulder).

209.17	Having isolated holes or suction cups:
	This subclass is indented under subclass 209.1. Tread having openings or hollow cavities completely surrounded by at least one tread element.

209.18	Having groove or sipe with specified dimension or structure therewithin:
	This subclass is indented under subclass 209.1. Tread having recesses identified as grooves, incisions, channels, calfs, narrow slits, cuts, or kerfs with specified dimensions (e.g., width, wall angle, depth, etc.) or characteristics of within-groove structure.

209.19

Protrusion from bottom and spaced from both walls (e.g., pebble ejector, etc.):

This subclass is indented under subclass 209.18. Tread having an element protruding from the bottom and spaced from both walls of the groove or sipe.

(1) Note. Documents placed in this subclass have a unique anti-skid tread design feature useful as pebble ejectors.

209.21	Protrusion from wall and spaced from the opposite wall:
	This subclass is indented under subclass 209.18. Tread having an element projecting from one wall and spaced from the opposing wall of the groove or sipe.

209.22

Protrusion bridging between walls (e.g., tie bar, etc.):

This subclass is indented under subclass 209.18. Tread having an element projecting from one wall, extending laterally and connecting to the opposing wall of the groove or sipe.

(1) Note. A tie bar is considered to be a protrusion which is connected to both sidewalls of a groove or sipe.

209.23	Both walls inclined in same direction:
	This subclass is indented under subclass 209.18. Tread having opposing walls of the groove or sipe angled in the same direction.

209.24	Having angle of inclination of one wall different from that of opposite wall:
	This subclass is indented under subclass 209.18. Tread wherein opposing walls of the groove or sipe have different angles of inclination.

209.25	Having grooves or sipes with different specified depths:
	This subclass is indented under subclass 209.18. Tread wherein at least one groove or sipe has a depth different from the depth of a second groove or sipe depth.

209.26	Having circumferential groove width at least 10% of tread width:
	This subclass is indented under subclass 209.18. Tread wherein the groove is circumferential wherein the width of said groove measures laterally at least 10% across the surface of a tire. (e.g., aquachannel, etc.)

209.27	Having continuous circumferential narrow width groove (i.e., less than 5mm.):
	This subclass is indented under subclass 209.18. Tread wherein the groove is circumferential and its width from wall to opposite wall measures less than 5mm.

209.28	Having directional two dimensional pattern (e.g., "V" shape, etc.):
	This subclass is indented under subclass 209.1. Tread having lateral grooves on each side of the tire equator which converge at an angle to form a "v" shape.

[List of Patents for class 152 subclass 210]

210

With embedded anti-skid elements:

This subclass is indented under subclass 209.1. Tread wherein the tire constitutes an anti-skid device by virtue of anti-skid elements embedded therein.

(1) Note. This subclass includes anti-skid elements, per se, when it is disclosed that they are for use in a tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:

169,	for armored tires wherein armor is embedded in the casing.
209.4,	for treads containing short fibers or anti-skid granules which are randomly dispersed at least throughout the upper portion of the tread
222,	for anti-skid devices, per se, consisting of flexible straps or cords extending across the tread of the tire which contain metal projections or combined chains to prevent slipping.

SEE OR SEARCH CLASS:

36,	Boots, Shoes, and Leggings, subclasses 59 through 67 for anti-skid devices with embedded anti-skid elements for use with footwear.
168,	Farriery, subclasses 29 through 43 for horseshoe calks.

[List of Patents for class 152 subclass 211]

211

Flush with tread:

This subclass is indented under subclass 210. The tread of the tire constitutes an anti-skid device by virtue of anti-skid elements embedded therein and flush with the surface thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

169	and 222, for similar subject matter.

SEE OR SEARCH CLASS:

106,	Compositions: Coating or Plastic, subclasses 36, for anti-skid compositions.

[List of Patents for class 152 subclass 212]

212

Radial filaments and laminations:

This subclass is indented under subclass 210. The tread of the tire constitutes an anti-skid device by virtue of anti-skid elements embedded therein and consisting of fibers, cords, wires, or fabric extending radially or substantially radially of the tire as viewed in lateral section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

168,	for similar subject matter.

[List of Patents for class 152 subclass 213]

213

Applying and removing devices:

This subclass is indented under subclass 208. Devices embodied in anti-skid devices to facilitate their mounting upon or removal from the tire, or for carrying such anti-skid devices upon the vehicle in position for ready mounting upon the tire, or both.

SEE OR SEARCH CLASS:

81,	Tool, subclass 15.8 for separate tools to apply chains.
254,	Implements or Apparatus for Applying Pushing or Pulling Force, subclasses 199 through 263 for portable implements or apparatus for tensioning flexible material (other than tire chains) from which the implements or apparatus are detached after tensioning.

[List of Patents for class 152 subclass 214]

214

Vehicle carried:

This subclass is indented under subclass 213. The applying and removing device for anti-skid devices is carried upon the vehicle.

(1) Note. For article carriers, see Class 224, Package and Article Carriers, subclasses 400+.

SEE OR SEARCH CLASS:

242,	Winding, Tensioning, or Guiding, subclasses 398+ for a reel carrier.

215	Running board carried:
	This subclass is indented under subclass 214. The applying and removing devices for anti-skid devices are carried upon the running board of the vehicle.

[List of Patents for class 152 subclass 216]

216

Wheel carried:

This subclass is indented under subclass 214. The applying and removing devices for the anti-skid devices are carried solely upon the wheel and rotate therewith.

SEE OR SEARCH THIS CLASS, SUBCLASS:

214,	for such devices supported partly by the wheel and partly by the vehicle body or running board.

[List of Patents for class 152 subclass 217]

217

Tighteners:

This subclass is indented under subclass 208. The anti-skid device is secured in place by means including a spring, constantly tending to bind the anti-skid device down upon the tire. This subclass takes such tensioning devices, per se, when specially adapted to this purpose, where no other securing means is combined therewith.

(1) Note. For the securing means without the continuing tension feature, in combination with the anti-skid device, see this class, subclasses 233-242.

(2) Note. For securing means, per se, with combined tightening functions, without the continuing tension feature, see appropriate subclasses in Class 24, Buckles, Buttons, Clasps, etc., especially, subclasses 68-70.

(3) Note. For tightening devices for use in application of the anti-skid device to the tire, and not having the continuing tension feature, see Class 81, Tools, subclass 15.8 for tools to apply chains.

(4) Note. For such tensioning devices, per se, of more or less general application, see Class 267, Spring Devices, subclass 69 and indented subclasses.

218	Radial:
	This subclass is indented under subclass 217. The anti-skid device tightener exerts its force upon the device radially of the wheel.

219	Circumferential:
	This subclass is indented under subclass 217. The anti-skid device tightener exerts its force upon the device circumferentially of the wheel.

220	Plural tire:
	This subclass is indented under subclass 208. The anti-skid device is designed for use upon two or more tires mounted side by side.

[List of Patents for class 152 subclass 221]

221

Flexible straps or cords:

This subclass is indented under subclass 208. The anti-skid device comprises anti-skid elements consisting of flexible straps or cords extending across the tread of the tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:

178,	179, 190, 191, and 373, for similar subject matter.

[List of Patents for class 152 subclass 222]

222

With metal anti-skid:

This subclass is indented under subclass 221. The flexible straps or cords of the anti-skid device have metal projections or combined chains to prevent slipping.

(1) Note. For the metal projections, see this class, subclasses 169 and 210.

(2) Note. For anti-skid devices with embedded anti-skid for use with footwear, see Class 36, Boots, Shoes, and Leggings, subclass 59 and indented subclasses.

223	Combined cross chains and plates or bars:
	This subclass is indented under subclass 208. The anti-skid devices comprise anti-skid elements consisting of chains, and additional such elements consisting of plates or bars. Each chain consists of a connected series of links extending across the tread of the tire, and the plates or bars extend across or substantially across the tread of the tire.

224	Superimposed:
	This subclass is indented under subclass 223. The combined cross chains and plates or bars in the anti-skid device are positioned one upon the other.

[List of Patents for class 152 subclass 225]

225

Plate or bar type:

This subclass is indented under subclass 208. The anti-skid device comprises anti-skid elements consisting of plates or bars extending across or substantially across the tread of the tire.

(1) Note. Where the plates are so small as to be in the nature of links, see this class, subclass 244.

(2) Note. For securing devices, see this class, subclasses 233, 241 and 242, and notes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	for anti-skid devices designed for use on two or more tires mounted side by side.

[List of Patents for class 152 subclass 226]

226

With traction lugs:

This subclass is indented under subclass 225. The plates or bars of the anti-skid device are provided with projections to prevent slipping.

(1) Note. For similar projections on horseshoes, see Class 168, Farriery, appropriate subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	for anti-skid devices designed for use on two or more tires mounted side by side.

[List of Patents for class 152 subclass 227]

227

Flanges:

This subclass is indented under subclass 226. The traction lugs on the plate or bar type anti-skid devices are projecting edges or ribs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	for anti-skid devices designed for use on two or more tires mounted side by side.

[List of Patents for class 152 subclass 228]

228

Integral:

This subclass is indented under subclass 227. The flanges serving as traction lugs on the plate or bar type anti-skid device are integral therewith.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	for anti-skid devices designed for use on two or more tires mounted side by side.

[List of Patents for class 152 subclass 229]

229

Calks:

This subclass is indented under subclass 226. The traction lugs on the plate or bar type anti-skid devices are symmetrical and taper toward a point, substantially.

(1) Note. For horseshoe calks, see Class 168, Farriery, appropriate subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	for anti-skid devices designed for use on two or more tires mounted side by side.

[List of Patents for class 152 subclass 230]

230

Integral:

This subclass is indented under subclass 229. The calks serving as traction lugs on the plate or bar type anti-skid device are integral therewith.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	for anti-skid devices designed for use on two or more tires mounted side by side.

[List of Patents for class 152 subclass 231]

231

Cross chain type:

This subclass is indented under subclass 208. The anti-skid device comprises anti-skid elements consisting of a connected series of links extending across the tread of the tire.

(1) Note. See Class 59, Chain, Staple, and Horseshoe Making, appropriate subclasses.

[List of Patents for class 152 subclass 232]

232

Independent sections:

This subclass is indented under subclass 231. The cross chain type anti-skid devices are of less than wheel encircling dimensions and are secured to the wheel independently of each other. Such devices may be used singly upon the wheel.

(1) Note. For chain arrangement, see this class, subclass 217 and indented subclasses, and 239.

(2) Note. See Class 59, Chain, Staple, and Horseshoe Making, appropriate subclasses.

SEE OR SEARCH CLASS:

301,	Land Vehicles: Wheels and Axles, subclass 42 for traction-improving chains.

[List of Patents for class 152 subclass 233]

233

Securing devices:

This subclass is indented under subclass 232. Devices for securing independent section, cross chain type, anti-skid devices to the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

172,	175, 176, 179, 182, 183, 187, 188, 191, 220-230, and 373 for similar subject matter.

[List of Patents for class 152 subclass 234]

234

Felly and spoke:

This subclass is indented under subclass 233. The securing device for the independent section, cross chain type, anti-skid device is secured to the wheel felly and spoke.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	through 230 for similar subject matter.

[List of Patents for class 152 subclass 235]

235

Spoke clamped:

This subclass is indented under subclass 234. The felly and spoke securing device for the independent section, cross-chain type, anti-skid device is clamped to a spoke.

(1) Note. For clamping devices, per se, see Class 24, Buckles, Buttons, Clasps, etc., subclasses 455+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	through 230 for similar subject matter.

[List of Patents for class 152 subclass 236]

236

Felly:

This subclass is indented under subclass 233. The independent section, cross chain type, anti-skid device is secured only to the felly.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	through 230 for similar subject matter.

[List of Patents for class 152 subclass 237]

237

Bound to felly:

This subclass is indented under subclass 236. The independent section, cross chain type, anti-skid device is secured to the wheel by means passing around the felly and without the aid of bolts, screws or the like secured to any part of the wheel.

(1) Note. For the securing means, see this class, subclasses 174, 181, 186, 220- 230, and 373.

[List of Patents for class 152 subclass 238]

238

Spoke:

This subclass is indented under subclass 233. The independent section, cross chain type, anti-skid devices are secured only to the spoke of the wheel.

(1) Note. For clamping devices per se, see Class 24, Buckles, Buttons, Clasps, etc., subclasses 455+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220,	through 230 for similar subject matter.

[List of Patents for class 152 subclass 239]

239

Annular:

This subclass is indented under subclass 231. The cross chain anti-skid device is a unit extending about the wheel when in assembled relation thereto and which may remain a unit during its removal from the wheel. This subclass is largely composed of devices wherein the cross chain tread elements are disposed other than in the conventional straight across manner, or are arranged in specifically designed groups, or both.

(1) Note. For the chain arrangement, see this class, subclass 217 and indented subclasses, 231 and 232.

[List of Patents for class 152 subclass 240]

240

With side anti-skid elements:

This subclass is indented under subclass 239. The annular, cross chain type, anti-skid device is provided with anti-skid elements at its sides to prevent lateral skidding or to engage in deep mud.

SEE OR SEARCH THIS CLASS, SUBCLASS:

232,	for devices with independent sections.

[List of Patents for class 152 subclass 241]

241

Securing devices:

This subclass is indented under subclass 239. The annular, cross chain type, anti-skid device in combination with means for maintaining the anti-skid device in operative position, or such means, per se, when specially adapted to this purpose.

(1) Note. For securing devices, per se, see Class 24, Buckles, Buttons, Clasps, etc., especially subclasses 68, 69, 70, 116, 598.1, and 698.1 and indented subclasses.

(2) Note. For chain links used as securing devices, see Class 59, Chain, Staple, and Horseshoe Making, especially subclass 84 and indented subclasses, and subclass 93.

(3) Note. For turnbuckles and other adjustable length securing devices, see Class 403, Joints and Connections, subclasses 43+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

174,	175, 179, 182, 183, 187, 188, 191, 225, 230-233, 257, and 323 for similar subject matter.

[List of Patents for class 152 subclass 242]

242

Securing rings:

This subclass is indented under subclass 241. Devices wherein the annular, cross chain type, anti-skid device is held to the tire by rings of smaller diameter than the tire tread, which rings are not secured to the wheel or tire, and which extend about the wheel at each side of the tire with the cross chains attached thereto. This subclass includes rings consisting entirely of chain.

SEE OR SEARCH THIS CLASS, SUBCLASS:

172,	177, 179, 184, 189, 191, and 225-230 for similar subject matter.

[List of Patents for class 152 subclass 243]

243

Modified links:

This subclass is indented under subclass 231. The cross chains of the anti-skid device comprise a link or links differing from the usual or conventional link.

(1) Note. Patents are classified herein rather than in Class 59, Chain, Staple, and Horseshoe Making, where the inventor states that the device may be used for anti-skid purposes and it is clear that the chain or link is modified to adapt it particularly for such use.

SEE OR SEARCH THIS CLASS, SUBCLASS:

171,	172, 232, 239, and 240 for similar subject matter.

[List of Patents for class 152 subclass 244]

244

Solid:

This subclass is indented under subclass 243. The cross chains of the anti-skid device comprise a link or links, the ground contacting surface of which is substantially unbroken throughout. These links are in the nature of plates.

(1) Note. Where the plates are large enough to extend across or substantially across the tread of the tire, see this class, subclass 225 and indented subclasses.

(2) Note. See Class 59, Chain, Staple, and Horseshoe Making, appropriate subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

171,	172, 232, 239, and 240 for similar subject matter.

[List of Patents for class 152 subclass 245]

245

With protectors:

This subclass is indented under subclass 243. The modified links of the cross chains are provided with separately formed devices tending to protect them against wear.

(1) Note. See Class 59, Chain, Staple, and Horseshoe Making, appropriate subclasses.

[List of Patents for class 152 subclass 246]

246

Cushion:

This subclass is indented under subclass 151. The tires are resilient and absorb road shocks by other than pneumatic means.

(1) Note. Tread surfaces of wood have been regarded as resilient, and placed in this class.

(2) Note. For cushion tires specially adapted for use with railway vehicles, see Class 295, Railway Wheels, and Axles, subclasses 11+.

SEE OR SEARCH CLASS:

156,	Adhesive Bonding and Miscellaneous Chemical Manufacture, subclasses 112+ and 404 for processes and apparatus for making nonpneumatic cushion tires.

[List of Patents for class 152 subclass 247]

247

Metallic springs:

This subclass is indented under subclass 246. The tire cushions the wheel by means of metallic springs. Such springs may be combined with rubber.

(1) Note. For combined pneumatic and metallic spring tires, see this class, subclass 156.

248	Tubular:
	This subclass is indented under subclass 247. The springs consist of one or more tubular annuli extending about the wheel. These may be sectional. The tube as a whole may have apertures or slots or notches therein.

249	Integral:
	This subclass is indented under subclass 248. Where the tire is a single metallic tubular annulus consisting of an integral element. The tube may be open at its rim zone and may have slots or notches therein.

250	Woven:
	This subclass is indented under subclass 248. The metallic spring tire consists of one or more woven tubes. The tube may be open at the rim zone. Either warp or weft may be nonmetallic.

251	Wheel encircling band:
	This subclass is indented under subclass 247. Devices in which one or more flexible spring bands extend about the wheel in spaced relation thereto. The bands may be composed of connected sections. A mere wire is considered to be a band, but where elements do no more than connect the outer ends of springs, they are not regarded as bands; nor is the provision of overlapping sections not connected to each other regarded as a band.

[List of Patents for class 152 subclass 252]

252

With supporting spring:

This subclass is indented under subclass 251. The flexible wheel encircling band of ... is supported by metal springs.

(1) Note. For flexible wheel encircling bands supported by an annular solid rubber element, see this class, subclass 302; for such bands supported by rubber sections, see subclass 303; for such bands described or claimed as armor and supported by an annular solid rubber element or by a pneumatic element, see subclass 185 and indented subclasses; for such bands built into the carcass of a pneumatic tire, see subclass 200.

(2) Note. For rigid wheel encircling bands supported by metal, rubber, or pneumatic resilient elements, or enclosed by or embedded within a pneumatic tire construction, see this class, subclass 17 and indented subclasses, even though the device is built into the form and semblance of a tire.

(3) Note. A thin flat metallic band spaced from the rim of a conventional wheel is assumed to be flexible, in the absence of positive evidence that it is rigid.

[List of Patents for class 152 subclass 253]

253

Leaf:

This subclass is indented under subclass 252. The flexible wheel encircling band is supported by leaf springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

270,	for cushioning springs that are leaf springs.

[List of Patents for class 152 subclass 254]

254

Circumferentially extending:

This subclass is indented under subclass 253. The leaf springs extend circumferentially of the wheel. This subclass includes springs having no positive securing means, being held in place by devices such as flanges, enclosures or encircling bands. This subclass also includes continuous endless leaf springs, however secured.

SEE OR SEARCH THIS CLASS, SUBCLASS:

271,	for similar subject matter.

[List of Patents for class 152 subclass 255]

255

Center secured:

This subclass is indented under subclass 254. The circumferentially extending leaf springs are secured at or adjacent their center. This subclass includes leaf springs which are additionally secured at their ends.

SEE OR SEARCH THIS CLASS, SUBCLASS:

272,	for similar subject matter.

[List of Patents for class 152 subclass 256]

256

End secured:

This subclass is indented under subclass 254. The circumferentially extending leaf springs are secured at their ends only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255	and 273, for similar subject matter.

[List of Patents for class 152 subclass 257]

257

Single end:

This subclass is indented under subclass 256. The leaf springs are secured at one end only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255,	256 and 274, for similar subject matter.

[List of Patents for class 152 subclass 258]

258

Transverse:

This subclass is indented under subclass 253. The leaf springs extend transversely of the plane of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

275	and 276, for similar subject matter.

[List of Patents for class 152 subclass 259]

259

Enclosed:

This subclass is indented under subclass 258. The transverse leaf springs are completely enclosed in an enclosure common to all. This enclosure may consist of a plurality of elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

277	and 279, for similar subject matter.

[List of Patents for class 152 subclass 260]

260

Rim secured:

This subclass is indented under subclass 258. The transverse leaf springs are secured to a rim by means other than an enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	and 280 through 283, for similar subject matter.

[List of Patents for class 152 subclass 261]

261

Coil:

This subclass is indented under subclass 252. The flexible wheel encircling band is supported by coil springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

284,	through 288 for similar subject matter.

[List of Patents for class 152 subclass 262]

262

Radial:

This subclass is indented under subclass 261. The coil springs extend radially substantially in the plane of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

289,	through 292 for similar subject matter.

[List of Patents for class 152 subclass 263]

263

Enclosed:

This subclass is indented under subclass 262. Devices in which the flexible wheel encircling band, the band-supporting radial coil springs, and all radially reciprocating elements except the tread are completely enclosed in an enclosure common to all. This enclosure may consist of a plurality of elements.

(1) Note. For similar devices without the wheel encircling band, having unconnected shoes between the springs and enclosure, whether the shoes are overlapped or not, see this class, subclass 293.

[List of Patents for class 152 subclass 264]

264

Annular guide flange:

This subclass is indented under subclass 263. The enclosure about the radial coil springs comprises a tread which is a separate element free to move radially and guided by annular flanges extending about the wheel. These flanges may be on either the wheel or the tread. They hold the tread against lateral displacement and may be the sole means securing the tread to the wheel.

(1) Note. For similar devices without the wheel encircling band, having unconnected shoes between the springs and enclosure, whether the shoes are overlapped or not, see this class, subclasses 294 and 295.

[List of Patents for class 152 subclass 265]

265

Integral enclosure:

This subclass is indented under subclass 263. The enclosure about the radial coil springs consist of a single element.

(1) Note. For similar devices without the wheel encircling band, having unconnected shoes between the springs and enclosure, whether the shoes are overlapping or not, see this class, subclasses 296 and 297.

[List of Patents for class 152 subclass 266]

266

Arcuate interior surface:

This subclass is indented under subclass 265. The interior surface of the integral enclosure about the radial coil springs presents an arcuate cross-section throughout, except that there may be some departure from the arcuate in providing wheel securing means adjacent the rim.

(1) Note. For similar devices without the wheel encircling band, having unconnected shoes between the springs and enclosure whether the shoes are overlapping or not, see this class, subclasses 298 and 299.

267	Enclosed:
	This subclass is indented under subclass 251. Inventions in which the flexible spring bands are completely encased in an enclosure common to all.

268	Integral enclosure:
	This subclass is indented under subclass 267. The enclosure about the flexible spring band consists of a single element.

269	Arcuate interior surface:
	This subclass is indented under subclass 268. The interior surface of the integral enclosure about the flexible spring band presents an arcuate cross-section throughout, except that there may be some departure from the arcuate in providing wheel securing means adjacent the rim.

[List of Patents for class 152 subclass 270]

270

Leaf:

This subclass is indented under subclass 247. The cushioning springs are leaf springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

253,	for flexible wheel encircling bands supported by leaf springs.

[List of Patents for class 152 subclass 271]

271

Circumferentially extending:

This subclass is indented under subclass 270. The cushioning springs are leaf springs arranged so that they extend in the direction of the circumference of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

254,	for similar subject matter.

[List of Patents for class 152 subclass 272]

272

Center secured:

This subclass is indented under subclass 271. The circumferentially extending cushioning springs are leaf springs secured at or adjacent their center. This subclass includes leaf springs which are additionally secured at their ends.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255,	for similar subject matter.

[List of Patents for class 152 subclass 273]

273

End secured:

This subclass is indented under subclass 271. The circumferentially extending leaf springs are secured at their ends only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

256,	and 272 for similar subject matter.

[List of Patents for class 152 subclass 274]

274

Single end:

This subclass is indented under subclass 273. The circumferentially extending leaf springs are secured at one end only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257,	for similar subject matter.

[List of Patents for class 152 subclass 275]

275

Transverse:

This subclass is indented under subclass 270. The cushioning springs are leaf springs extending transversely of the plane of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

258,	for similar subject matter.

[List of Patents for class 152 subclass 276]

276

Embedded:

This subclass is indented under subclass 275. The transversely extending leaf springs are embedded in cooperating structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

258,	for similar subject matter.

[List of Patents for class 152 subclass 277]

277

Enclosed:

This subclass is indented under subclass 275. The transversely extending leaf springs are completely enclosed in an enclosure common to all. This enclosure may consist of a plurality of elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	for similar subject matter.

[List of Patents for class 152 subclass 278]

278

Rim secured:

This subclass is indented under subclass 277. The enclosed transversely extending leaf springs are secured to a rim by means other than the enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	for similar subject matter.

[List of Patents for class 152 subclass 279]

279

Retaining ring secured:

This subclass is indented under subclass 278. The enclosed transversely extending leaf springs are secured to the wheel by a circumferential ring. The ring may be either inside or outside of the enclosure.

(1) Note. For securing rings to bind the tire on the rim, see this class, subclasses 152, 307, 388 and indented subclasses, and 399.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	262 and 283 for similar subject matter.

[List of Patents for class 152 subclass 280]

280

Rim secured:

This subclass is indented under subclass 275. The transversely extending springs are secured to a rim by means other than an enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	260 and 278 for similar subject matter.

[List of Patents for class 152 subclass 281]

281

Rim flange engagement:

This subclass is indented under subclass 280. The rim secured transversely extending leaf springs are secured to the rim by engagement with flanges thereon.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	260 and 278 for similar subject matter.

[List of Patents for class 152 subclass 282]

282

Radial securing means:

This subclass is indented under subclass 280. The rim secured transversely extending leaf springs are secured to the rim by means other than flanges, extending radially in a plane or planes parallel to the plane of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	260 and 278 for similar subject matter.

[List of Patents for class 152 subclass 283]

283

Retaining ring secured:

This subclass is indented under subclass 280. The rim secured transversely extending leaf springs are secured in place by a circumferential ring or rings. The rings may be either inside or outside the tire.

(1) Note. For securing rings to bind the tire on the rim, see this class, subclasses 152, 307, 388 and indented subclasses, and 399.

SEE OR SEARCH THIS CLASS, SUBCLASS:

259,	260 and 278 for similar subject matter.

[List of Patents for class 152 subclass 284]

284

Coil:

This subclass is indented under subclass 247. The cushioning springs are coil springs.

SEE OR SEARCH THIS CLASS, SUBCLASS:

261,	for similar subject matter.

[List of Patents for class 152 subclass 285]

285

Circumferential:

This subclass is indented under subclass 284. The cushioning springs are coil springs, one or more of which extends about the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

261,	for similar subject matter.

[List of Patents for class 152 subclass 286]

286

Embedded:

This subclass is indented under subclass 285. The circumferentially extending coil springs are embedded in cooperating structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

261,	for similar subject matter.

[List of Patents for class 152 subclass 287]

287

Enclosed:

This subclass is indented under subclass 285. All the circumferentially extending coil springs are completely enclosed in an enclosure common to all. This enclosure may consist of a plurality of elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

261,	for similar subject matter.

[List of Patents for class 152 subclass 288]

288

Arcuate interior surface:

This subclass is indented under subclass 287. The interior surface of the enclosure about the circumferentially extending coil springs presents an arcuate cross section throughout, except that there may be some departure from the arcuate in providing wheel securing means adjacent the rim.

SEE OR SEARCH THIS CLASS, SUBCLASS:

261,	for similar subject matter.

[List of Patents for class 152 subclass 289]

289

Radial:

This subclass is indented under subclass 284. The cushioning springs are coil springs extending radially substantially in the plane of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

262,	for similar subject matter.

[List of Patents for class 152 subclass 290]

290

Sectional tire units:

This subclass is indented under subclass 289. The tire consists of individual radially extending coil spring cushioning units each forming a section of the tire and acting independently of the others.

SEE OR SEARCH THIS CLASS, SUBCLASS:

262,	for similar subject matter.
292	and 295, wherein tread elements coact with each other, either directly or through the springs.

[List of Patents for class 152 subclass 291]

291

With plungers:

This subclass is indented under subclass 290. Inventions having radially extending spring pressed plungers each with a shank extending through a wall of the tire and rim assembly and each being part of a tire section acting independently of other tire sections. The shank extends outwardly to carry or constitute a tread section and may also extend inwardly through the rim.

SEE OR SEARCH THIS CLASS, SUBCLASS:

262,	for similar subject matter.
292,	for spring pressed plungers carrying tread sections which coact with each other.

[List of Patents for class 152 subclass 292]

292

With plungers:

This subclass is indented under subclass 289. Inventions having radially extending spring pressed plungers, each with a shank extending through a wall of the tire and rim assembly.

SEE OR SEARCH THIS CLASS, SUBCLASS:

262	and 291, for similar subject matter.

[List of Patents for class 152 subclass 293]

293

Enclosed:

This subclass is indented under subclass 289. The radial coil springs and all radially reciprocating elements except the tire tread, are completely enclosed in an enclosure common to all. This enclosure may consist of a plurality of elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

263,	for similar subject matter.

[List of Patents for class 152 subclass 294]

294

Annular guide flange:

This subclass is indented under subclass 293. The enclosure about the radial coil springs comprises a tire tread which is a separate element free to move radially and guided by annular flanges extending about the wheel. These flanges may be on either the wheel or tread. They hold the tread against lateral displacement and may be the sole means securing the tread to the wheel. This subclass includes unconnected shoes between the springs and enclosure and these shoes may overlap.

SEE OR SEARCH THIS CLASS, SUBCLASS:

162	through 164 and 264, for similar subject matter.

[List of Patents for class 152 subclass 295]

295

Sectional tread:

This subclass is indented under subclass 294. The flange guided tire tread comprised in the enclosure about the radial coil springs is sectional and the tread elements coact with each other either directly or through the springs. Compare ... of this class wherein there is no such coaction. This subclass may have unconnected shoes between the springs and enclosure, and these shoes may overlap.

SEE OR SEARCH THIS CLASS, SUBCLASS:

264,	for similar subject matter.

[List of Patents for class 152 subclass 296]

296

Integral enclosure:

This subclass is indented under subclass 293. The enclosure about the radial coil springs consists of a single unit. This subclass may have unconnected shoes between the springs and enclosure and these shoes may overlap.

SEE OR SEARCH THIS CLASS, SUBCLASS:

265,	for similar subject matter.

[List of Patents for class 152 subclass 297]

297

With nonmetallic band:

This subclass is indented under subclass 296. Devices having a nonmetallic band encircling the radial coil springs inside the integral enclosure. This band may be sectional.

SEE OR SEARCH THIS CLASS, SUBCLASS:

265,	for similar subject matter.

[List of Patents for class 152 subclass 298]

298

Arcuate interior surface:

This subclass is indented under subclass 296. The interior surface of the integral enclosure about the radial coil springs presents an arcuate cross section throughout, except that there may be some departure from the arcuate in providing wheel securing means adjacent the rim. This subclass may have unconnected shoes between the springs and enclosure, and these shoes may overlap.

SEE OR SEARCH THIS CLASS, SUBCLASS:

266,	for similar subject matter.

[List of Patents for class 152 subclass 299]

299

With nonmetallic band:

This subclass is indented under subclass 298. Devices in which a nonmetallic band encircles the radial coil springs inside the integral arcuate-surfaced enclosure. This band may be sectional.

SEE OR SEARCH THIS CLASS, SUBCLASS:

266,	for similar subject matter.

[List of Patents for class 152 subclass 300]

300

Sectional:

This subclass is indented under subclass 246. The cushion tires are nonmetallic and consist of sections either abutting each other or otherwise so constructed and arranged as to provide continuous or substantially continuous smooth rolling road contact. This group includes tires having sectional tread surfaces of wood.

(1) Note. For sectional rigid tires and for resilient anti-skid lugs on rigid tires, see Class 301, Land Vehicles: Wheels and Axles, appropriate subclasses.

[List of Patents for class 152 subclass 301]

301

Annular:

This subclass is indented under subclass 300. The sections extend annularly about the wheel.

(1) Note. For such sections secured together by vulcanization or similar means, see this class, subclass 323.

[List of Patents for class 152 subclass 302]

302

Superimposed:

This subclass is indented under subclass 301. The annular sections are superimposed upon each other radially of the wheel.

(1) Note. For tires where the outer section encloses the inner section laterally, search this class, subclass 310 and indented subclasses.

(2) Note. For superimposed annular sections joined by vulcanization or otherwise to form an integral tire, search this class, subclass 323 and indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157	and 315, for similar subject matter.

303	Superimposed:
	This subclass is indented under subclass 300. Sections of the tire are superimposed upon each o