Manual of U.S. Patent Classification
as of June 30, 2000

Class
305
WHEEL SUBSTITUTES FOR LAND VEHICLES

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

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Subclass		Title
ClassTitle		===> WHEEL SUBSTITUTES FOR LAND VEHICLES
1		STEPPER TYPE
2		. Cam positioned
3		. Having plural link connector elements
4		. Feet attached to rim
5		. . Spring biased
6		RIGID PORTABLE TRACK
7		. Circular
8		WITH RAIL ENGAGING MEANS
9		WITH BRAKE
100		WITH MEANS TO REMOVE OR EXCLUDE FOREIGN MATTER (E.G., SEAL, SCRAPER)
101		. With means between track links or shoes
102		. With peripheral seal between bushing and track link
103		. With end seal between bushing and track link
104		. . And at connector pin
105		. With seal between connector pin and bushing
106		. With seal between connector pin and track link
107		. With deflector plate, track guide means, or scraper
108		. . With deflector or guard mounted to track body
109		. . With deflector plate mounted to lateral side of track
110		. . With scraper mounted to scrape track or wheel
111		. With self-cleaning tread or track unit
112		. . Including self-cleaning endless belt
113		. . Having openings through side or base of shoe or link
114		. . With particular shoe, lug, grouser structure, or material
115		. With self-cleaning sprocket or drive wheel
116		TRACK GUIDE OR ALIGNMENT MECHANISM
117		WITH LUBRICATION
118		. Including passage in connector pin
119		. Including passage in or for roller structure
15		COMBINED OR CONVERTIBLE
120		WITH FRAME CARRIED ENDLESS TRACK
121		. With roller antifriction means
122		. . Track carried
123		. . Rollers engage toothed wheel or frame
19		SINGLE WHEEL TYPE
20		WHEEL ON TOP OF UPPER TRACK RUN
124		WITH TRACK SUPPORT INTERMEDIATE OF END WHEELS
125		. Including end wheel support for movement to maintain track tension
126		. Intermediate support includes wheel contacting upper and lower track runs
127		. Including elongated slide or frame support
128		. . Combined with at least one intermediate roller
129		. With roller support contacting lower track run
130		. . With frame-mounted rollers
131		. . . Adjustable or movable frame
132		. . With roller support mounted for movement individually or in pairs
133		. . . Including individual roller mounted for movement at end of arm
134		. . . Including walking beam or pivoting arm
135		. . With high drive arrangement
136		. . Specific roller structure, per se
137		. . . Including structure to engage track (e.g., wear surface, cushion)
138		. . With roller mounting means
139		. . With intermediate upper track run support
140		. . With endless roller chain support
141		. . With vertically movable wheel support
142		. . With plural wheel support
143		WITH MEANS FOR TENSIONING TRACK BY MOVING AT LEAST ONE ENDWHEEL
144		. Condition responsive (e.g., inclination, speed, operator command)
145		. Having hydraulic adjusting means
146		. . Including spring device (e.g., coil spring)
147		. . . Coil spring housed within hydraulic cylinder
148		. . Including gas recoil
149		. . With vent or relief valve
150		. Vertically movable endwheel
151		. Biased by spring only
152		. . Longitudinally outwardly biased by coil spring only
153		. Longitudinally adjustable
154		. . Including threaded tension adjuster
155		. With intermediate support member (e.g., linkage)
156		. Tensioner contained within idler wheel
33		WITH INTERPOSED FRICTION DRIVE BELT
34		INFLATABLE MEANS
157		ENDLESS BELT HAVING NONMETALLIC TRACK OR TREAD
158		. Track formed of flexible sections
159		. Track formed of rigid nonmetallic links
160		. . Lug, shoe, or grouser structure, per se
161		. . . With mounting means
162		. . . . Including threaded fastening means
163		. . With noncylindrical or hollow connector pin
164		. . Including metal sleeve for connector pin
165		. Track formed of endless flexible belt
166		. . Including plural layers of different materials
167		. . With metallic embedded reinforcement
168		. . . Including clip for snowmobile track
169		. . . Including means for sprocket tooth engagement (e.g.,lug aperture)
170		. . . Reinforcement is endless
171		. . . . Including core bar reinforcement
172		. . . . . With overlapping core bar sections
173		. . . . . Including sprocket wheel or roller guide lug or projection
174		. . . . . . Plural lugs or projections
175		. . . . . . . Including additional reinforcement for sprocket wheel
176		. . . . Portion of resilient belt overlaps core bar (e.g., roller engagement surface)
177		. . . Including core bar reinforcement
178		. . With integral grouser
179		. . . With reinforcement in or at grouser formation
180		. . With removable lug or grouser
181		. . Grouser connects plural adjacent belts
182		. . Including discrete connector to connect opposite belt ends
183		. With connecting means for reinforcement elements
184		. With friction drive structure
185		TRACKS OR TREADS
40		. Cable connected treads
41		. Resilient connection between treads
42		. . Torsion bushing
43		. . Resilient compressible hinge
44		. Steerable
45		. Adjustable connection between treads
46		. With resiliently biased ground engaging portion
47		. With sag prevention means
48		. . Projecting truss type
49		. . . Truss interconnected
50		. Track treads interconnected without separate fastening means
51		. With street plate
52		. With roller means
53		. One piece track tread
186		. Having master link
187		. With detachable grouser for endless chain track
188		. . Including additional locking means to elminate stress concentration
189		. . Including nonmetallic part or component
190		. . Reversible
191		. . Grouser structure, per se
192		. . . Specific material (e.g., hardness, welding, method of manufacture)
193		. With guide means for interfitting with sprocket wheel or roller
194		. . Track wheel wear protection (e.g., track element protection)
195		. . Sprocket and track engagement
196		. . . Track formed of rigid links
197		. . . . Having nonmetallic part or component (e.g., at area of engagement)
198		. . . . Link or shoe structure, per se
199		. . . Sprocket wheel structure, per se
200		. . Track formed of rigid links
201		. . . Link or shoe structure, per se
202		. Separate transverse connector pin between treads
203		. . Including nonmetallic part or component
204		. . Including additional locking member for retaining link connectors (e.g., pin connectors)
59		. . Including noncylindrical or hollow connector pin
60		MISCELLANEOUS
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		CROSS-REFERENCE ART COLLECTION
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900		MASTER LINK

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Last Modified: 6 October 2000