This class includes the elementary structure of a running-gear for a land vehicle, that is, commonly known as a "wheel" or an "axle", per se. The combination of a "significant" wheel or axle with "nominal" other structure, i.e., wherein the wheel or axle comprises the dominant feature or essential part, is also found in this class.

LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
(1) This class is subordinate to Class 280, Land Vehicles, and distinguishes therefrom by the above definition.
(2) This class is subordinate to Class 180, Motor Vehicles. The broader or more comprehensive combinations of cooperating structure of a wheel and axle with other elements of a motor-vehicle are classified in Class 180. Such cooperating structure on the wheel and axle is found in this class (301) only where its modification is for wheel and axle structure purposes alone.
(3) The combination of a detailed wheel with a detailed brake is found in Class 301. A brake with only enough wheel structure to support the brake is found in Class 188, Brakes.
(4) A wheel or the combination of a wheel with a resilient tire or with a resilient wheel component is normally found in Class 301. A resilient tire, a resilient wheel, or a resilient wheel component is found in Class 152. For example, a resilient tire with a rim including details of the rim allowing the tire to be seated thereon is found in Class 152, but it is found in Class 301 if further including mounting structure for supporting that structure on a bearing hub. A traction-increasing device supported by a wheel, even though combined with a resilient tire, is found in Class 301,
but another traction-increasing device operative to engage the tread of the tire and permit resilient operation thereof is found in Class 152.
(5) A device which functions as a transportation means for a vehicle, but which is not a true wheel, is found in Class 180, Motor Vehicles, subclasses 7.1+; and Class 305, Wheel Substitutes for Land Vehicles.

REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:
29, Metal Working, subclass 894.3 for a process of making (including assembling) a wheel or wheel part.
74, Machine Element or Mechanism, for a casing for an axle; or for an axle (especially a motor vehicle axle) which involves improvement in the gear casing or in the gearing. An axle housing, per se (which may be recited as an "axle") is found in Class 301.
152, Resilient Tires and Wheels (see Lines With Other Classes, 4, above).
180, Motor Vehicles (see Note 2 and Lines With Other Classes and With This Class, above).
280, Land Vehicles, for a vehicle riding on a runner(s) or for a runner, per se. (see Lines With Other Classes, (1) above.)
305, Wheel Substitutes for Land Vehicles, subclass 7 for a rigid circular track provided with a wheel or roller within the track the axis of which is eccentrically positioned with relation to the axis of the track, said wheel or roller being adapted to roll on a lower portion of the track, and subclasses 124+ for wheels especially modified to be used in flexible track apparatus for land vehicles. For a patent claiming a wheel, per se, to be placed in Class 305 the wheel as disclosed must include structure which coacts with a track part, such as a flanged rim, or a grooved rim which structure is adapted to interengage with a portion of a flexible track. A wheel which does not incorporate such structure, even though disclosed as being a flexible track-supporting wheel, is classified in this class (301).
384, Bearings, for a vehicle wheel bearing.
474, Endless Belt Power Transmission Systems or Components, particularly subclasses 166+ for a friction drive pulley or guide roll.

This subclass is indented under the class definition. Combination involving combined modification of both wheel and axle or modification of one which affects the operation of the other.

This subclass is indented under subclass 1. Combination having spring element to cushion relative lateral movement of the wheel.

This subclass is indented under subclass 1. Combination of wheel, axle and driving pedal crank, used chiefly in bicycle propulsion.

SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 594.1 for a journal bearing with a crank and pedal.
384, Bearings, subclass 431 for a plain bearing and subclass 458 for an antifriction bearing for a pedal type crank.

WHEEL:
This subclass is indented under the class definition. Structure comprising that part of a running-gear commonly known as a wheel, i.e., a member having a round periphery, adapted to turn about its center and to supportingly carry a vehicle over the land (1) by rolling engagement of the periphery with the land or (2) by rolling engagement of a tire on the periphery with the land.

SEE OR SEARCH CLASS:
16, Miscellaneous Hardware, subclasses 18+ for a caster including a wheel.
249, Static Molds, subclass 56 for mold for forming a vehicle wheel.
428, Stock Material or Miscellaneous Articles, subclass 579 for a metallic blank or circular shape and of width greater than its thickness.

Balancing device:
This subclass is indented under subclass 5.1. Wheel comprising (1) a wheel having provision to equalize the weight of one portion thereof with respect to another, or (2) a member particularly adapted to be used on a wheel to equalize the weight of one portion of the wheel with respect to another.

SEE OR SEARCH THIS CLASS, SUBCLASS:
53.5 for a weight added to a wheel to increase the traction thereof.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclass 154.1 for a resilient tire having provision to balance the tire (compared to means to balance the wheel or wheel and tire assembly found in this subclass.)

Self-operating:
This subclass is indented under subclass 5.21. Wheel wherein the balancing device includes provision to allow a portion thereof to relocate to effect weight equalization without outside impetus.

With peripheral roller:
This subclass is indented under subclass 5.1. Wheel combined with at least one additional member which is also adapted to function as a wheel, which additional member turns about a second axis, which second axis orbits about the first axis, i.e., the axis of the "primary" wheel.

Having housing for tire inflation means:
This subclass is indented under subclass 5.1. Wheel including structure for protecting a member intended to transmit a filling fluid to a hollow tire thereon.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 450+ for an inflatable pneumatic tire or tire combined with a wheel, including a tire inflation means; and subclasses 427+ for an inflating means combined with a wheel.

This subclass is indented under subclass 5.1. Wheel particularly adapted to use on a roller skate.
(1) Note. A roller skate wheel combined with a bearing is included in this subclass.

SEE OR SEARCH CLASS:
16, Miscellaneous Hardware, subclasses 45+ for a wheel particularly adapted to use on a caster.
152, Resilient Tires and Wheels, for a tire or wheel under that class definition which might be used on a roller skate.
384, Bearings, for a skate bearing, per se.

This subclass is indented under subclass 5.3. Wheel having an antifriction bearing.

With drive or brake attachment:
This subclass is indented under subclass 5.1. Wheel combined with an element (1) which transmits force to the wheel to effect movement thereof or (2) which receives force from the wheel to prevent movement thereof.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclass 153 for a cooling device for a resilient tire.
188, Brakes, for a brake for a wheel without "significant" recitation of a wheel. The combination of a "significant" brake with a "significant" wheel is included in this and the indented subclasses (301/6.1+).

Aircraft wheel:
This subclass is indented under subclass 6.1. Wheel particularly adapted to use on an aircraft to support that aircraft while on the ground.

And with brake-cooling means:
This subclass is indented under subclass 6.1. Wheel including provision to reduce the thermal level of the brake structure.

Comprising means to utilize a fluid:
This subclass is indented under subclass 6.3. Wheel wherein the provision to reduce the thermal level uses a contained flowable medium such as a gas or liquid to carry heat away from the brake.
(1) Note. A cooling fin intended to transfer heat to passing air does not "contain" a flowable medium and, therefore, is not included herein.

Drive means on wheel:
This subclass is indented under subclass 6.1. Wheel combined with an element which transmits force to the wheel to effect movement thereof.

Wheel supported on brake drum clear of hub:
This subclass is indented under subclass 6.1. Wheel combined with a brake member intended to turn about the wheel axis, said member having a cylindrical friction surface thereon, which wheel is supported by the brake member without any other load-bearing attachment to the vehicle.

Brake drum supported on wheel clear of hub:
This subclass is indented under subclass 6.1. Wheel combined with a brake member intended to turn about the wheel axis, said member having a cylindrical friction surface thereon, which brake member is supported by the wheel member without any other load-bearing attachment to the vehicle.

Disc brake:
This subclass is indented under subclass 6.1. Wheel including a brake member intended to turn about the wheel axis, said member having an axially facing friction surface thereon.

For cycle-type vehicle:
This subclass is indented under subclass 6.1. Wheel particularly adapted to use on a two or three wheel bicycle or motorcycle.

Having vibration damper or heat insulator:
This subclass is indented under subclass 6.1. Wheel including (1) provision to eliminate regular, repetitive oscillations or (2) provision to prevent the transfer of heat.

This subclass is indented under subclass 5.1. Wheel of the type usable on an ordinary wheelbarrow.

This subclass is indented under subclass 5.1. Wheel having structure in addition to that of a conventional wheel for reinforcing any component part at any point.

Detachable wheel section:
This subclass is indented under subclass 5.1. Wheel having means whereby a substantial part of the wheel, e.g., not less than a demountable rim and tire, is removably secured to an inner part without removing the inner part from an attached position on the axle.

With provision to permit positioning of rim laterally of hub:
This subclass is indented under subclass 9.1. Wheel with means to allow the rim to be held on the supporting structure (hub) in a first axial position or alternatively in a second axial position.

Demountable rim:
This subclass is indented under subclass 9.1. Wheel wherein the detachable, substantial part comprises an annular member intended (1) to rollingly engage the ground or (2) to support a tire intended to rollingly engage the ground.

Rim-securing means:
This subclass is indented under subclass 10.1. Wheel having
means to attach the rim to the periphery of a wheel body.

With lock between rim and wheel body:
This subclass is indented under subclass 11.1. Wheel combined with means distinct from the securing means to prevent separation of the rim and the wheel web.

With spacer between rim and wheel body:
This subclass is indented under subclass 11.1. Wheel combined with means distinct from the securing means to fill clearance between the radially inner surface of the rim and the radially outer surface of the wheel web.

Spoke secured:
This subclass is indented under subclass 11.1. Wheel wherein the rim is secured directly (i.e., without a separate felly) to the spokes of the wheel.

Radially movable spoke:
This subclass is indented under subclass 12.1. Wheel wherein the securing means comprises a spoke with at least a portion thereof repositionable outwardly from the axis.

Plural rims:
This subclass is indented under subclass 11.1. Wheel including more than one rim mounted on the wheel.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclass 376 for nondemountable plural rims each of which is particularly adapted for use with a resilient tire.

Dual rims:
This subclass is indented under subclass 13.1. Wheel including more than one rim of substantially equal radial extent positioned near each other along the wheel axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:
36.1 for dual wheels.

This subclass is indented under subclass 11.1. Wheel wherein the means for securing the rim to the wheel can be operated to assist in removing the rim.

This subclass is indented under subclass 11.1. Wheel including a transplit rim, i.e., a rim of adjustable length so that the rim is secured to the wheel by contracting the rim about the periphery of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 30+ for a demountable, transversely divided rim without securing means, generally.

This subclass is indented under subclass 11.1. Wheel wherein the portion located radially inside the rim includes a component that is movable radially outwardly to engage and secure the rim thereon.

This subclass is indented under subclass 11.1. Wheel wherein there is a bayonet-joint connection between the outer periphery of the wheel and the inner periphery of the rim.

This subclass is indented under subclass 11.1. Wheel wherein the rim is secured by a wedge operable to exert a radial pressure on the rim.

This subclass is indented under subclass 18. Wheel wherein the wedging-surfaces extend along the axis of the wheel.

This subclass is indented under subclass 19. Wheel wherein the wedge has movement discrete of that of both the rim and the wheel web.

This subclass is indented under subclass 20. Wheel wherein the wedge comprises a tapered, helical member that is rotated about its axis to effect movement thereof along its axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:
28 for a wheel having a demountable rim secured by a radially extending latch bolt.

This subclass is indented under subclass 20. Wheel wherein the wedge is in the form of a ring extending around the periphery of the wheel.

This subclass is indented under subclass 11.1. Wheel wherein the securing means comprises a removable side ring.

SEE OR SEARCH THIS CLASS, SUBCLASS:
22 for a ring shaped wheel rim securing means comprising a wedge.

This subclass is indented under subclass 11.1. Wheel wherein the securing means comprises a removable side lug.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 18+ for a wheel wherein the rim is secured by a wedge operable to exert radial pressure on the rim.

This subclass is indented under subclass 11.1. Wheel wherein either the rim or the wheel-body carries a member capable of movement to lock the rim to the wheel-body.

This subclass is indented under subclass 25. Wheel wherein the securing means comprises a ring secured to a wheel element by means such that the ring can be moved to two positions, one locking the rim in place and the other in a position to release it.

This subclass is indented under subclass 26. Wheel wherein the securing ring includes a portion that is movable radially outwardly to engage and secure the rim to the wheel body.

This subclass is indented under subclass 25. Wheel wherein the latch comprises a helically ribbed member positioned with its axis extending away from the wheel axis, such that upon rotation about its axis the member is caused to move away from the wheel axis and secure the rim to the wheel body.

SEE OR SEARCH THIS CLASS, SUBCLASS:
21 for wheel having a removable rim secured to the wheel body by a radially acting bolt wedge.

This subclass is indented under subclass 25. Wheel wherein the latch is a pivoted element.

Circumferentially divided rim:
This subclass is indented under subclass 11.1. Wheel having a demountable rim which is divided into plural axial sections, which rim is secured to the wheel body by bringing together the rim's sections.
(1) Note. The structure of the rim is such that the sections can be separated only when there is no tire on the wheel.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 396+ for rim parts which are particularly adapted for use with a resilient tire, which rim parts are separable to facilitate removal of the tire.

This subclass is indented under subclass 9.1. Wheel wherein the demountable rim or a section thereof is divided by a cut generally parallel to the wheel axis.

One section both transversely and circumferentially divided:
This subclass is indented under subclass 30. Wheel having a demountable rim which is divided into plural axial sections, which rim is secured to the wheel body by bringing together the rim's sections, wherein one axial section thereof is cut parallel to the wheel axis.

This subclass is indented under subclass 30. Wheel wherein the rim is divided by a plurality of transverse cuts.

This subclass is indented under subclass 31. Wheel wherein two sections of the rim are pivotally attached to each other.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclass 377 for a rim particularly adapted to receive a resilient tire, which rim includes a retracting wheel section.

This subclass is indented under subclass 30. Wheel wherein adjacent ends of the divided rim are provided with means for moving such ends into or out of aligned relation.

SEE OR SEARCH CLASS:
157, Wheelwright Machines, subclass 1.35 for a rim-breaking device which is not part of the rim and is intended to be removed therefrom during normal use of the rim.

This subclass is indented under subclass 33. Wheel wherein the adjacent ends of the rim are provided with tool-receiving means to be used to align the ends of the rim.

Circumferentially divided rim:
This subclass is indented under subclass 9.1. Wheel having a demountable rim which is divided into plural axial sections, which rim is secured to the wheel body by bringing together the rim's sections.
(1) Note. The structure of the rim is such that the sections can be separated only when there is no tire on the wheel.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 396+ for rim parts which are particularly adapted for use with a resilient tire, which rim parts are separable to facilitate removal of the tire.

Rim sections held together by bayonet joint:
This subclass is indented under subclass 35.1. Wheel wherein the axial sections are configured such that one is moved toward the other along the wheel axis, i.e., their axes, then rotated so that the sections interfit and cannot be separated without reversal of the movement.

Rim sections held together by transversely divided locking ring:
This subclass is indented under subclass 35.1. Wheel wherein the axial sections are configured to interfit with an annular member so that they cannot be separated without removal of the annular member, wherein the annular member is divided by a cut generally parallel to the wheel axis.

Including means to prevent relative rotation between rim and wheel body:
This subclass is indented under subclass 10.1. Wheel including structure adapted to interfit with the rim and the wheel web to secure the two members such that one will not turn about the wheel axis with respect to the other.

Geared mounting mechanism:
This subclass is indented under subclass 9.1. Wheel wherein the detachable section comprises a toothed rotary member which is intended to be used to effect securement of the wheel on supporting structure, e.g., on an axle.

Artillery wheel with single-acting retaining means:
This subclass is indented under subclass 9.1. Wheel which is particularly adapted to use in transporting ordnance and which includes a member for securing that wheel to supporting structure, such as an axle, by a single movement.

Artillery wheel bolted to hub:
This subclass is indented under subclass 9.1. Wheel which is particularly adapted to use in transporting ordnance and which is configured to be secured to supporting structure, such as an axle, by a helically ribbed member interfitting with the supporting structure.

By central nut:
This subclass is indented under subclass 35.54. Wheel wherein the helically ribbed member is concentric with the wheel axis.

Wire-spoke wheel with single-acting mounting means:
This subclass is indented under subclass 9.1. Wheel having the hub joined to the rim by a plurality of generally radially extending slender rods and including a member for securing that wheel to supporting structure, such as an axle, by a single movement.

Wire-spoke wheel bolted to hub:
This subclass is indented under subclass 9.1. Wheel having the hub joined to the rim by a plurality of generally radially extending rods and configured to be secured to supporting structure, such as an axle, by a helically ribbed member interfitting with the supporting structure.

By central nut:
This subclass is indented under subclass 35.57. Wheel wherein the helically ribbed member is concentric with the wheel axis.

Spoke formations bolted to hub:
This subclass is indented under subclass 9.1. Wheel having the hub joined to the rim by a member configured to appear to be a plurality of generally radially extending rods.

Disc wheel with single-acting retaining means:
This subclass is indented under subclass 9.1. Wheel having the hub joined to the rim by a generally flat, radially
extending platelike member and including a member for securing that wheel to supporting structure, such as an axle, by a single movement.

Disc wheel bolted to hub:
This subclass is indented under subclass 9.1. Wheel having the hub joined to the rim by a generally flat, radially extending platelike member and configured to be secured to supporting structure, such as an axle, by a helically ribbed member interfitting with the supporting structure.

By central nut:
This subclass is indented under subclass 35.62. Wheel wherein the helically ribbed member is concentric with the wheel axis.

Dual wheels:
This subclass is indented under subclass 5.1. Plural wheels of substantially equal radial extent positioned near each other along a common wheel axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:
13.2 for a single wheel supporting dual demountable rims.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclass 376 for a wheel particularly adapted for receiving plural resilient tires.

Relatively rotatable:
This subclass is indented under subclass 36.1. Dual wheels wherein both turn about the same axis but may turn at different rates.

With wear-preventing means therebetween:
This subclass is indented under subclass 36.1. Dual wheels combined with a member fitting between the wheels to reduce abrasive deterioration of the wheels or of the tires thereon.

With wheel cover:
This subclass is indented under subclass 5.1. Wheel combined with a facing member secured to and rotating with the wheel, covering a substantial portion of the wheel other than the bearing hub to ornament or protect said wheel.
(1) Note. Included herein is a trim member which covers less that an entire wheel, e.g., a rim-covering trim ring.
(2) Note. A wheel cover, per se, is included herein if particularly adapted for attachment to a vehicle wheel.
(3) Note. A wheel may include a "wheel hub" which is detachably secured to a "bearing hub" and which is permanently attached to the radially innermost portion of the wheel body. A "hub cap" covering the "wheel hub" is included in this and the indented subclasses; whereas a "hub cap" covering only the "bearing hub" is in subclasses 108.1+.

SEE OR SEARCH THIS CLASS, SUBCLASS:
108 for a member which engages and covers only the axial end of the hub of a wheel.

SEE OR SEARCH CLASS:
40, Card, Picture, or Sign Exhibiting, subclass 587 for an ornamental or sign- carrying member to be mounted on a wheel or axle of a land vehicle which does not rotate when the vehicle is in motion.
52, Static Structures (e.g., Buildings), subclass 716.5 for an in situ attached- type channel or trim strip for a fixed structure, generally.
206, Special Receptacle or Package, subclasses 304+ for a receptacle for a tire.
280, Land Vehicles, subclass 156 for a wheel-attached dust or mud guard and subclass 160 for a wheel guard for attachment to a vehicle.
D12, Transportation, subclasses 204+ for a design patent
for a wheel.

With anti-theft device for wheel cover:
This subclass is indented under subclass 37.1. Wheel combined with a member intended to make difficult unauthorized removal of the cover from the wheel.

Tire sidewall:
This subclass is indented under subclass 37.1. Wheel wherein the facing member comprises a member intended to cover an axially facing portion of a ground-engaging tire.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 151+ for a resilient tire or for the combination of a resilient tire with only that portion of a wheel that is particularly adapted to receive a resilient tire. The combination of a detailed, nonresilient wheel with a resilient tire is in Class 301.

Retained on wheel cover:
This subclass is indented under subclass 37.22. Wheel wherein the facing member includes both a portion extending over the tire and a portion extending over the wheel and wherein the portion extending over the tire is attached to the portion extending over the wheel.

Trim ring covering rim only:
This subclass is indented under subclass 37.1. Wheel wherein the facing member is annular and is intended to cover only that portion of the wheel intended to support a tire.

With relatively rotatable element:
This subclass is indented under subclass 37.1. Wheel combined with an additional facing member that is permitted to turn more than 3605 with respect to the first facing member.

Including distinct central medallion:
This subclass is indented under subclass 37.1. Wheel wherein the facing member has a first portion and a second portion attached thereto, which second portion is positioned near the axis of the wheel.

Attached to plastic cover permanently secured to wheel:
This subclass is indented under subclass 37.26. Wheel including a first facing member made primarily of organic polymeric material secured to the wheel so that it is not readily detachable and including a detachable central medallion.

SEE OR SEARCH THIS CLASS, SUBCLASS:
37.43 for a plastic wheel cover permanently secured to a wheel, generally.

Including access door:
This subclass is indented under subclass 37.1. Wheel wherein the facing member has an openable panel intended to allow admission to the vehicle wheel.

Wire-spoke wheel simulating wheel cover:
This subclass is indented under subclass 37.1. Wheel wherein the facing member is configured to appear as a wire-spoke wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
9.1 for a wire-spoke wheel having a detachable section,
especially subclasses 35.56+ for such a wheel bolted to a hub, subclass 35.58 for such a wheel with single-acting mounting means, and subclass 35.59 for a wheel having a disc portion configured to appear as a wire-spoke wheel.

Including resilient securing means:
This subclass is indented under subclass 37.1. Wheel having a spring member intended to hold the facing member in position on the web or rim.

Resilient securing ring on cover:
This subclass is indented under subclass 37.31. Wheel wherein the spring member is generally annular about the wheel axis and is a component of the facing member.
(1) Note. A spring member that extends more than 1805 about the wheel axis is considered to be generally annular. Note further that the annular spring may be of irregular radii.

Acting to bias portion of cover into engagement with wheel:
This subclass is indented under subclass 37.32. Wheel wherein the spring member yieldably urges a portion of the basic material of the facing member into engagement with a portion of the wheel itself to hold the facing member in position thereon.

Detachable:
This subclass is indented under subclass 37.31. Wheel wherein the spring member is itself removable from both the wheel and the facing member.

Wheel body or rim having integral securing bump:
This subclass is indented under subclass 37.1. Wheel having a raised surface extending from the surface of the web of the wheel or from the rim intended to hold the facing member in position thereon.

Bump on rim:
This subclass is indented under subclass 37.35. Wheel having a raised surface extending from the rim.

Cover securing threaded means:
This subclass is indented under subclass 37.1. Wheel having a helically ribbed means intended to mate with the facing member or wheel and to hold the facing member in position on the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
108.4 for a hub cap secured to a hub by a threaded means.

Central thread:
This subclass is indented under subclass 37.37. Wheel wherein the helically ribbed means mates with the facing member or with the wheel about a helix coextensive with the wheel axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:
108.5 for a hub cap secured to a hub by a central threaded means.

Cover having integral securing teeth:
This subclass is indented under subclass 37.1. Wheel wherein the facing member has formed therefrom sharp protuberances intended to directly engage the wheel to thereby hold the facing member in position on the wheel.

Cover securing, wheel spoke engaging means:
This subclass is indented under subclass 37.1. Wheel including means intended to hold the facing member in position on the wheel by engagement with a spoke of the wheel.

Plastic cover:
This subclass is indented under subclass 37.1. Wheel wherein the cover member is made primarily of organic polymeric material.

SEE OR SEARCH THIS CLASS, SUBCLASS:
108.3 for a plastic hub cap.

Permanently secured to wheel:
This subclass is indented under subclass 37.42. Wheel including a first facing member made primarily of organic polymeric material secured to the wheel such that it is not readily detachable.

SEE OR SEARCH THIS CLASS, SUBCLASS:
37.27 for a plastic wheel permanently secured to a wheel, combined with a detachable central medallion.

Emergency:
This subclass is indented under subclass 5.1. Wheel intended to be used only when an ordinary wheel is unavailable and intended to be used only temporarily, either to assist or to take the place of the ordinary wheel.

Tire or rim:
This subclass is indented under subclass 38.1. Wheel in which a tire or rim is used for emergency purposes instead of a whole wheel.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclass 152 for an emergency resilient tire; subclass 158 for a resilient tire with a filler to support the wheel, as if inflated, during an emergency; and subclasses 516-521 for a run-flat tire, i.e., a tire with an internal support.

Traction increasing:
This subclass is indented under subclass 39.1. Wheel wherein the emergency tire or rim is intended to increase the tractive effort of the wheel or to prevent slipping (or sluing) of the wheel from its intended direction of travel, and is readily removable from the ordinary wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
41.1 for a wheel with traction-increasing provision, generally.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 208+ for a resilient tire including means to increase the traction thereof, without details of the supporting wheel other than details adapting the device for use with a resilient tire.

Auxiliary tire mounted to one side of main wheel:
This subclass is indented under subclass 40.1. Wheel wherein the traction increasing emergency wheel comprises a coaxial unit secondary to the main wheel, which is axially offset therefrom.

Safety emergency tire or rim:
This subclass is indented under subclass 39.1. Wheel with provision to function in the event of unexpected failure or the ordinary wheel.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 516-521 for a run-flat tire, i.e., a tire with an internal support.

Rim clamp for securing emergency tire to rim:
This subclass is indented under subclass 39.1. Wheel including a member intended to grip the rim to secure the emergency tire thereto.

Cover cleated to wheel to provide smooth road surface:
This subclass is indented under subclass 39.1. Wheel comprising a tread member intended to be temporarily secured to the wheel body and to encase the tire therein, presenting a continuous tread to the surface of the roadway.

Auxiliary wheel movable radially into emergency position:
This subclass is indented under subclass 38.1. Wheel comprising an auxiliary wheel having an axis parallel to that of the ordinary wheel, movable laterally to present the periphery of the wheel to the earth.

Traction increasing:
This subclass is indented under subclass 5.1. Wheel including provision for increasing the tractive effort thereof or for preventing slipping (or sluing) of the wheel from its intended direction of travel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
40.1 for an emergency wheel with traction-increasing provision.

Wheel under subclasses 41.1+ wherein such traction-improving provision comprises a chain.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 231+ for a traction-increasing chain for a resilient tire.
305, Wheel Substitutes for Land Vehicles, subclass 19 for an endless flexible track mounted about the periphery of a wheel to completely surround such wheel and be carried thereby.

This subclass is indented under subclass 41.1. Wheel in which the traction-increasing provision comprises a member extending radially beyond the ground-engaging perimeter of the wheel or tire.

SEE OR SEARCH CLASS:
172, Earth Working, subclasses 540+ for rolling or rotating earth working tools with circumferentially spaced teeth, tines, blades or the like.

Removably attached:
This subclass is indented under subclass 43. Wheel from which the cleat is readily detached.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 556 for a rolling earth-working tool with a tooth or blade clamped to a hub face.

Of resilient material:
This subclass is indented under subclass 44.1. Wheel wherein the removable cleat is made of material which after deformation will return to its original configuration.

To rim:
This subclass is indented under subclass 44.1. Wheel wherein the cleat is readily removable from attachment to the rim of the wheel.

To wheel body:
This subclass is indented under subclass 44.1. Wheel wherein the cleat is readily removable from attachment to the web of the wheel.

This subclass is indented under subclass 43. Wheel in which the cleat is movable with respect to its support for any purpose.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 545 for a rolling earth working tool with movable blades or teeth.
305, Wheel Substitutes for Land Vehicles, subclasses 4+ for a ground-engaging element movably secured to the rim of a wheel in the form of a stepper. Class 305 takes a device in the form of a plate pivotally secured to the rim of a wheel and adapted to extend in a plane parallel to the ground when in contact therewith to simulate the action of a foot even though the plate is provided with a ground-engaging cleat. The device of Class 305 is distinguished from that of Class 301, subclasses 45+ in that the traction-increasing device of Class 301 comprises a ground-engaging cleat which may be movably mounted on the rim of a wheel; the plate of Class 305 is adapted to simulate the action of a foot when in contact with the ground.

This subclass is indented under subclass 45. Wheel wherein such movement permits adjustment by some control.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 541 and 546 for a rolling earth
working tool having projecting teeth or blades and means for adjusting the teeth or blades.

This subclass is indented under subclass 46. Wheel wherein the cleat is carried by a supplemental support adapted for attachment to a conventional type of wheel.

This subclass is indented under subclass 46. Wheel wherein the cleat, during revolution of the wheel, is alternately projected and retracted, the projected position being at the ground-engaging position of the spur or cleat.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 546 for a rolling earth working tool with alternately projecting and retracting teeth or blades.

This subclass is indented under subclass 48. Wheel wherein the cleat is carried by a supplemental support adapted for attachment to a conventional type of wheel.

This subclass is indented under subclass 46. Wheel including a plurality of projecting cleats each of which is adjustable, with respect to the wheel body, independently of the other cleats.

This subclass is indented under subclass 45. Wheel wherein the cleat is moved to a projected position by a spring.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 544 for a rolling earth working tool with a spring mounted tooth or blade.
305, Wheel Substitutes for Land Vehicles, subclass 5 for spring-biased elements movably mounted on the rim of a wheel forming ground-engaging feet as the wheel rotates.

This subclass is indented under subclass 41.1. Wheel including two rims of substantially equal radial extent positioned near each other along a common wheel axis with a projecting, traction-improving cleat extending from one rim to the other.

SEE OR SEARCH CLASS:
172, Earth Working, subclasses 552+ for a rolling earth working tool having laterally extending bars supported on parallel rims.

This subclass is indented under subclass 41.1. Wheel wherein the ground-engaging portion of the wheel (other than a "tire") is provided in its face with a series of openings or depressions to increase the tractive effort thereof.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 534 for a rolling earth working tool with openings in the rim.

Wheel weight:
This subclass is indented under subclass 41.1. Wheel with provision to add mass thereto to increase traction.

SEE OR SEARCH THIS CLASS, SUBCLASS:
5.21 for a weight used to balance a wheel.

This subclass is indented under subclass 5.1. Wheel wherein the rim and hub are connected by two means, one of which supports the load on the hub by the compression and the other by the tension of said means.

This subclass is indented under subclass 5.1. Wheel wherein the rim and hub are connected by means which supports the load on the hub by deliberately applied tension of said means.

This subclass is indented under subclass 55. Wheel wherein the supporting means are radial spokes each of which is secured at its radially inner extent to the hub at a point such that a radius from the point is normal to the axis of the spoke.
(1) Note. A wheel may include a "wheel hub" which is detachably secured to a "bearing hub" and which is permanently attached to the radially innermost portion of the wheel body. In this subclass, the spokes comprise the wheel body and may be attached to either type of hub.

This subclass is indented under subclass 55. Wheel wherein the supporting means comprises at least a first pair of straight rodlike members under tension, which are united at one end of each.

This subclass is indented under subclass 55. Wheel including details of the point of attachment of a straight rodlike member under tension and the outer peripheral member of the wheel.
(1) Note. A "rim" comprises an annular member of a wheel that either engages the ground directly or supports a "tire" which engages the ground. A "felly" is a single member that is less than annular which acts in conjunction with other fellies as a rim.

This subclass is indented under subclass 55. Wheel including details of the point of attachment of a straight rodlike member under tension and the innermost member of the wheel.

This subclass is indented under subclass 59. Wheel including more than one straight rodlike member under tension and including means that is to be so manipulated that all (or substantially all) of the spokes can be shortened at the same time.

This subclass is indented under subclass 59. Wheel including a straight rodlike member under tension, and including a tubular member for receiving the rodlike member, wherein the hub is formed with a pocket for receipt of the tubular member.

This subclass is indented under subclass 5.1. Wheel in which the load carried on the hub is supported by the compression of the material of the wheel between the hub and the ground.
(1) Note. A spoke type wheel wherein tension was not deliberately applied to the spokes is included in this subclass.

Disc:
This subclass is indented under subclass 62. Wheel including a flat or dish shaped, load-carrying portion between the rim and the hub.

SEE OR SEARCH THIS CLASS, SUBCLASS:
5.3 for a disc-type skate wheel.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 535 for a rolling earth-working tool comprising a disc with a detachable rim, and subclass 604 for an earth-working disc, per se.

Having spoke configuration:
This subclass is indented under subclass 63.1. Wheel in which the material of the supporting disc is shaped to simulate in form or in function the distinct spokes of a conventional spoke wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 55+ for a spoke wheel in which the spokes are under tension.
62 for a wheel in which the body is comprised of spokes without deliberately applied tension or under compression.
subclasses 73+ for a spoke wheel in which the spokes are arranged in two or more planes.
subclasses 79+ for a spoke wheel, generally.

SEE OR SEARCH CLASS:
172, Earth Working, subclass 557 for a rolling earth-working
tool comprising a rim with spokes.

Wheel body formed from two discs permanently secured together:
This subclass is indented under subclass 64.1. Wheel including a first load-carrying portion and a second load-carrying portion between the rim and hub; both of which are generally flat or dish shaped and are fastened to each other such that they are not readily separable.

Wheel formed from two discs:
This subclass is indented under subclass 63.1. Wheel including a first load-carrying portion and a second load- carrying portion between the rim and hub; both of which are generally flat- or dish-shaped and are fastened to each other.

Removably secured together:
This subclass is indented under subclass 64.3. Wheel wherein the first and second load-carrying, generally flat- or dish-shaped, portions are detachably fastened to each other.

By tab struck from disc:
This subclass is indented under subclass 64.4. Wheel wherein the first and second load-carrying, generally flat- or dish-shaped, portions are secured to each other by a flap member on one of the portions that extends into the other.

Of fabric, wood or paper:
This subclass is indented under subclass 63.1. Wheel made primarily of (1) woven textile, (2) naturally occurring cellulose, or (3) solidified cellulose pulp.

Of plastic:
This subclass is indented under subclass 63.1. Wheel made primarily of organic polymeric material.
(1) Note. A disc wheel of "rubber" is included herein.

This subclass is indented under subclass 62. Wheel in which the wheel as a whole or a substantial whole is formed of metal by casting.

This subclass is indented under subclass 62. Wheel where two or more spokes are integrally connected.

This subclass is indented under subclass 62. Wheel including details of the point of attachment of a straight rodlike supporting member under compression and the outer peripheral member of the wheel.
(1) Note. A "rim" comprises an annular member of a wheel that either engages the ground directly or supports a "tire" which engages the ground. A "felly" is a single member that is less than annular which acts in conjunction with other fellies as a rim.

This subclass is indented under subclass 67. Wheel in which such connecting means is adjustable.

This subclass is indented under subclass 68. Wheel in which such adjustment is accomplished by screw means.

This subclass is indented under subclass 67. Wheel including a straight rodlike member between the hub and the rim (or felly) under compression, and including a tubular member for receiving the rodlike member, wherein the rim is formed with a pocket for receipt of the tubular member.

This subclass is indented under subclass 70. Wheel wherein the separate spoke-pocket also functions to secure the adjacent ends of a felly together.

This subclass is indented under subclass 67. Wheel where the felly and spoke connection is also a joint between adjacent ends of a felly.

This subclass is indented under subclass 62. Wheel formed of two or more series of spokes arranged in different planes.

This subclass is indented under subclass 73. Wheel including
means for connecting the spokes to the hub.

This subclass is indented under subclass 74. Wheel in which connection is such that it permits manipulation to tighten a spoke on the wheel.

This subclass is indented under subclass 74. Wheel wherein a spoke is forced into a socket formed in the hub.

This subclass is indented under subclass 76. Wheel wherein the hub is reinforced by a band or casing adjacent to the socket receiving the spoke.

SEE OR SEARCH THIS CLASS, SUBCLASS:
106 for a hub-reinforcing band or casing, generally.

This subclass is indented under subclass 74. Wheel in which the hub is formed in sections adapted to clamp the end of the spoke therebetween.

This subclass is indented under subclass 62. Wheel wherein the spokes of the wheel are formed in a single series in the same plane.

This subclass is indented under subclass 79. Wheel including details of the point of attachment of a straight radial rodlike wheel body member under compression and the radially innermost member of the wheel.

This subclass is indented under subclass 80. Wheel in which the connection is such that it permits manipulation to tighten a spoke on the wheel.

This subclass is indented under subclass 80. Wheel wherein a spoke is forced into a socket formed in the hub.

This subclass is indented under subclass 82. Wheel wherein the hub is reinforced by a band or casing adjacent to the sockets for receiving the spoke.

SEE OR SEARCH THIS CLASS, SUBCLASS:
106 for a hub-reinforcing band or casing, generally.

This subclass is indented under subclass 80. Wheel in which the hub is formed in sections adapted to clamp the end of the spoke therebetween.

This subclass is indented under subclass 84. Wheel in which the ends of a plurality of spokes are clamped by the hub and are so arranged relative to each other that their inner ends form a continuous ring.

This subclass is indented under subclass 5.1. Wheel including a particular ground-engaging means distinct from the body or rim which means is annular and is not intended to yield under compressive load when in engagement with the ground.
(1) Note. A nonresilient tire, per se, to be used on a wheel is included herein.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 151+ for a tire that is intended to yield under compressive load when in engagement with the ground.

This subclass is indented under subclass 86. Wheel particularly related to means for securing the tire to a conventional part of the wheel.

SEE OR SEARCH THIS CLASS, SUBCLASS:
11.1 for means to secure a demountable rim to the other portions of a vehicle wheel.

This subclass is indented under subclass 87. Wheel wherein the fastening means also functions to join the adjacent ends of felly-sections.

This subclass is indented under subclass 87. Wheel wherein the securing means comprises a filler member that is either (1) a tapered or (2) a relatively thin plate, intended to fit between adjacent wheel elements to effect securement of the tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 19+ for similar means for securing a demountable rim to the other components of a wheel.

This subclass is indented under subclass 86. Wheel wherein the tire is provided with means to raise the wheel out of a streetcar track.

This subclass is indented under subclass 86. Wheel wherein the length of the tire is adjustable.

This subclass is indented under subclass 91. Wheel wherein the adjusting means is operated by a screw-threaded element.

This subclass is indented under subclass 92. Wheel wherein the screw is provided at opposite ends with right and left hand threads.

This subclass is indented under subclass 91. Wheel wherein the adjusting means is a wedge.

This subclass is indented under subclass 5.1. Wheel including that portion of a wheel intermediate the spokes and tire.
(1) Note. A "rim" comprises an annular member of a wheel that either engages the ground directly or supports a "tire" which engages the ground. A "felly" is a single member that is less than annular which acts in conjunction with other fellies as a rim.
(2) Note. A rim or felly, per se, to be used on a wheel is included herein.

This subclass is indented under subclass 95. Wheel wherein the rim or felly is made of metal.

This subclass is indented under subclass 96. Wheel wherein the metallic rim or felly is intended for use with a resilient tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:
10.1 for a wheel having a detachable section comprising a rim.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 151+ for a tire, per se, for use with the rim of this subclass or for the combination of such tire with only that portion of the wheel needed to receive the tire. The combination of a specific wheel with a resilient tire is in this class (301).

This subclass is indented under subclass 95. Wheel wherein the rim or felly is intended for use with a resilient tire.

SEE OR SEARCH THIS CLASS, SUBCLASS:
10.1 for a wheel having a detachable section comprising a rim.

SEE OR SEARCH CLASS:
152, Resilient Tires and Wheels, subclasses 151+ for a tire, per se, for use with the rim of this subclass or for the combination of such tire with only that portion of the wheel needed to receive the tire. The combination of a specific wheel with a resilient tire is in this class (301).

This subclass is indented under subclass 95. Wheel with particular reference to structure for joining the adjacent ends of felly-sections.

This subclass is indented under subclass 99. Wheel wherein such joint is adjustable, usually to tighten the wheel due to wear.

This subclass is indented under subclass 100. Wheel wherein the adjustment is accomplished by a screw-threaded element.

This subclass is indented under subclass 101. Wheel wherein the screw element is provided at opposite ends with right and left handed threads.

This subclass is indented under subclass 100. Wheel wherein the adjusting means is a wedge.

This subclass is indented under subclass 5.1. Wheel comprising the portion of a wheel extending between the hub and the rim or tire, which portion includes a rodlike generally radially extending member.
(1) Note. A spoke, per se, to be used on a wheel is included herein.

Hub:
This subclass is indented under subclass 5.1. Wheel comprising the radially innermost portion of the wheel, i.e., the portion at the axis thereof.
(1) Note. A hub, per se, to be used on a wheel is included herein.

This subclass is indented under subclass 105.1. Wheel including a band or a casing adapted to surround and reinforce the hub.

SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for a plural spoke series wheel having a hub reinforcing band or casing adjacent the sockets for the spokes.
83 for a single spoke series wheel having a hub reinforcing band or casing adjacent the sockets for the spokes.

This subclass is indented under subclass 106. Wheel having a band which extends beyond and gives a finish to the outer end of the hub.

Hub cap:
This subclass is indented under subclass 105.1. Wheel including a member which engages and covers an exposed axial end of a wheel hub.

SEE OR SEARCH THIS CLASS, SUBCLASS:
37.1 for a facing member which covers a more substantial portion of a wheel than the hub.

SEE OR SEARCH CLASS:
40, Card, Picture, or Sign Exhibiting, subclass 587 for an ornamental or sign-carrying member adapted to be attached to the wheel or axle of a land vehicle which does not rotate when the vehicle is in motion.
220, Receptacles, subclasses 200+ and see the notes thereto for a receptacle closure in general.

Having transparent window:
This subclass is indented under subclass 108.1. Wheel wherein a portion of the hub cap is clear so that light may pass through.

Plastic hub cap:
This subclass is indented under subclass 37.1. Wheel wherein the cover member is made primarily of organic polymeric material.

SEE OR SEARCH THIS CLASS, SUBCLASS:
37.42 for a plastic wheel cover.

Retained by threaded means:
This subclass is indented under subclass 108.1. Wheel including a helically ribbed fastener used to secure the hub cap to the hub.

SEE OR SEARCH THIS CLASS, SUBCLASS:
37.37 for a wheel cover secured to a wheel by a threaded means.

Central-threaded means:
This subclass is indented under subclass 108.4. Wheel wherein the threaded means is concentric with the wheel axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:
37.38 for a wheel cover secured to a wheel by a central threaded means.

This subclass is indented under subclass 105.1. Wheel having means secured to the hub comprising a bearing for the wheel on the axle.

This subclass is indented under subclass 109. Wheel having means for securing the bearing in the hub.

For cycle-type vehicle:
This subclass is indented under subclass 6.1. Wheel particularly adapted to use on a two or three wheel bicycle or motorcycle.

Circumferentially divided:
This subclass is indented under subclass 110.5. Wheel including a hub that is made of two pieces that are axially distinct from each other.

This subclass is indented under subclass 5.1. Wheel particularly directed to means for securing a wheel to the axle.

SEE OR SEARCH CLASS:
295, Railway Wheels and Axles, subclasses 44+ for a similar device for a railway wheel.
411, Expanded, Threaded, Driven, Headed, Tool-Deformed, or Locked-Threaded Fastener, subclasses 337+ for a threadless bolt fastener of general application.

This subclass is indented under subclass 111. Wheel having detachable means secured to the axle and engaging against the outer face of the wheel-hub.

SEE OR SEARCH CLASS:
295, Railway Wheels and Axles, subclasses 49+ for a similar device for a railway wheel.

This subclass is indented under subclass 112. Wheel in which the end stop is or is held in place by a transversely extending rod, e.g., a cotter pin, passing diametrically through the wheel axis.

SEE OR SEARCH CLASS:
295, Railway Wheels and Axles, subclass 50 for a similar device for a railway wheel.

This subclass is indented under subclass 112. Wheel wherein the outer end stop is secured to the axle by screw means.

This subclass is indented under subclass 114. Wheel wherein the outer end stop is a plural part nut, one part of which is adjustable to lengthen the nut to take up wear in the bearing.

This subclass is indented under subclass 114. Wheel having a construction of the hub adapted for manipulation to engage the screw out end stop, so that by rotation of the wheel the screw-stop is disengaged from the axle.

This subclass is indented under subclass 114. Wheel in which the screw means is a bolt engaging a threaded hole in the end of the axle.

This subclass is indented under subclass 112. Wheel wherein the outer end stop is secured to the axle by a bayonet-joint connection.

This subclass is indented under subclass 112. Wheel wherein the outer end stop is secured to the axle by pivoted detent.

This subclass is indented under subclass 112. Wheel wherein the outer end stop is secured to the axle by a sliding detent.

This subclass is indented under subclass 111. Wheel wherein a movable-latch detent secured to either the wheel or the axle is adapted to engage the other to hold both elements assembled.

This subclass is indented under subclass 111. Wheel wherein a removable collar or sleeve on either the wheel or the axle is adapted, when assembled, to engage a stop on the other.

Lug nut:
This subclass is indented under subclass 111. Wheel including particular helically threaded means intended to interfit with a corresponding other helically threaded part of the wheel to secure the wheel to the bearing hub.

This subclass is indented under subclass 5.1. Wheel for attachment to either the wheel or the axle and cooperating with the other for excluding dust, sand, and dirt from the
wheel and axle bearing.

SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing means or process, subclasses 500+ for a dynamic, circumferential, contact seal for other than a piston.
384, Bearings, subclass 157, 262 and 460, where means are provided to exclude dust, etc., from the bearing.

AXLE:
This subclass is indented under the class definition. Structure relating to the structure for rotatably supporting a wheel on a vehicle.
(1) Note. A combination of axle structure and the mounting thereof upon a vehicle is beyond the scope of Class 301. As set forth in the (1) and (2) Notes of the class definition, Class 301 is subordinate to either Class 180, Motor Vehicles, or Class 280, Land Vehicles.

SEE OR SEARCH CLASS:
180, Motor Vehicles, appropriate subclasses for an axle mounted upon a self-propelled vehicle. Note the criteria specified in Class 180 definition for determining whether the self-propelled vehicle is proper for this class (Class 180). Class 180 is superior to Class 280 in the class hierarchy.
280, Land Vehicles, appropriate subclasses for a general utility wheeled land vehicle, especially subclass 80.1 for particular running gear construction or subclasses 274+ or 281.1+ for an occupant propelled type wheeled land vehicle (it is noted that in accordance with the (2) Note of Class 280, subclass 200, motorcycle frames and running gear, without features causing classification in Class 180, Motor Vehicles, are included in these subclasses).
295, Railway Wheels and Axles, subclass 36.1 for an axle under that definition.
464, Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, subclasses 179+ for a rotary torque transmitting shaft.

With distinct handle to effect mounting on cycle-type vehicle:
This subclass is indented under subclass 124.1. Axle combined with means to attach the bearing hub of a wheel to an axle, which means is intended to be grasped by the hand of an operative and comprises a different member from the axle or the bearing hub.
(1) Note. A nut having a portion extending therefrom is included herein if the portion is movable with respect thereto.

This subclass is indented under subclass 124.1. Axle modified for cooperation with structure which performs other vehicle function.

This subclass is indented under subclass 124.1. Axle which as a whole or in part rotates, the wheel being fixed to rotate therewith.

This subclass is indented under subclass 124.1. Axle which is substantially offset from a straight line by bowing or by forming cranked portions therein.

This subclass is indented under subclass 124.1. Axle which is adjustable to increase or decrease it length.

SEE OR SEARCH CLASS:
180, Motor Vehicles, subclass 209 for a self-propelled vehicle of "special wheel base" construction wherein the location or number of supporting wheels may be altered. See Class 180, subclass 21 definition for the meaning attributed to "special wheel base".
280, Land Vehicles, subclass 149.1 for a general utility wheeled land vehicle running gear having interchangeable axles or subclasses 638+ for a general utility wheeled land vehicle including means to alter a dimension of the vehicle or a part thereof.

This subclass is indented under subclass 124.1. Axle which is trussed by braces to increase its strength.

This subclass is indented under subclass 124.1. Axle for emergency-repairing of a broken axle.

This subclass is indented under subclass 124.1. Axle including a terminal member distinct from the portion of the axle that extends under and engages the vehicle proper, which member is generally rodlike, is at the wheel axis, supports the wheel (bearings) directly, and is, in turn, supported by the vehicle-engaging portion of the axle.

SEE OR SEARCH CLASS:
180, Motor Vehicles, appropriate subclasses for a spindle axle mounted upon a self-propelled vehicle wherein the spindle axle is either (a) driven, (b) driven and steered, or (c) steered by a power assisting steering system. Note the criteria specified in Class 180 definition for determining whether the self-propelled vehicle is proper for this class (Class 180). Class 180 is superior to Class 280 in the class hierarchy.
280, Land Vehicles, subclass 124.125 for particular running gear construction separately supporting a wheel upon an individual stub axle.

This subclass is indented under subclass 131. Spindle including particular provision for attaching such spindle to the vehicle-engaging portion of the axle.

This subclass is indented under subclass 132. Spindle wherein such mounting means includes a member intended to yield within its elastic limit to support the wheel relative to the vehicle, while allowing relative movement (in addition to rotary movement) with respect thereto.

This subclass is indented under subclass 124.1. Axle including a terminal member distinct from the portion of the axle that extends under and engages the vehicle proper, which member is generally cuplike, is at the wheel axis, supports the wheel (bearings) directly, and is, in turn, supported by the vehicle-engaging portion of the axle over which the cuplike top fits.

SEE OR SEARCH CLASS:
180, Motor Vehicles, appropriate subclasses for a skein axle mounted upon a self-propelled vehicle wherein the skein axle is either (a) driven, (b) driven and steered, or (c) steered by a power assisting steering system. Note the criteria specified in Class 180 definition for determining whether the self-propelled vehicle is proper for this class (Class 180). Class 180 is superior to Class 280 in the class hierarchy.
280, Land Vehicles, subclass 124.125 for particular running gear construction separately supporting a wheel upon an individual stub axle.

This subclass is indented under subclass 134. Skein including particular provision for attaching such skein to the vehicleengaging portion of the axle.

This subclass is indented under subclass 135. Skein wherein such mounting means includes a member intended to yield within its elastic limit to support the wheel relative to the vehicle, while allowing relative movement (in addition to rotary movement) with respect thereto.

Including housing for drive mechanism:
This subclass is indented under subclass 124.1. Axle of a type intended to have means to transmit rotary force to the wheel supported thereon including particular provision to encase such means.

SEE OR SEARCH CLASS:
180, Motor Vehicles, subclasses 337+ for a self-propelled land vehicle including a transmission mechanism. Note the criteria specified in Class 180 definition for determining whether the self-propelled vehicle is proper for this class (Class 180). Class 180 is superior to Class 280 in the class hierarchy.
280, Land Vehicles, subclass 124.156 for a particular running gear construction supporting a "live" axle.