Patent US3900231A successfully refreshed from Google Patents.
US3900231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded track for a track-laying vehicle
Assignee: Goodrich Corp
•
Filing: 1973-10-23
•
Granted: 1975-08-19
•
Expires: 1993-10-23
Abstract
Abstract An endless and substantially flat track for use with a tracklaying vehicle which is supported by slide rails, with the track having an outer ground-engaging surface and an inner driving surface with drive lugs molded thereon. The track is imperforate and has a peripherally extending slide pad of a low frictional coefficient flexible material disposed in a position to engage the slide bar of the vehicle. The low frictional coefficient slide surface material is a non-thermoplastic woven fabric material which is integrally molded with the belt itself. The slide surface is peripherally coextensive with the inner surface of the belt.
Inventors
- 👤 George D Ohm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:16
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
A flexible track for a track laying vehicle, the vehicle having at least one slide rail adapted to slidably engage the track, the track comprising: an endless belt of elastomeric material, the belt having an inner periphery and an outer periphery, drive engaging means molded around the inner periphery, tread means molded upon the outer periphery thereof, and at least one low friction slide rail bearing surface extending continuously longitudinally around the inner periphery of the belt wherein the bearing surface comprises a woven fabric, the fabric partially embedded in and integrally molded to the inner periphery of the belt and partially exposed for operative engagement with the at least one slide rail.
Claim 2
Dependent Claim
113 words
A flexible track for a track laying vehicle, the vehicle having at least one slide rail adapted to slidably engage the track, the track comprising: an endless belt of elastomeric material, the belt having an inner periphery and an outer periphery, drive engaging means molded around the inner periphery, tread means molded upon the outer periphery thereof, and at least one low friction slide rail bearing surface extending continuously longitudinally around the inner periphery of the belt wherein the bearing surface comprises a woven fabric, the fabric partially embedded in and integrally molded to the inner periphery of the belt and partially exposed for operative engagement with the at least one slide rail.
Claim 3
Dependent Claim
17 words
The flexible track of claim 1 further characterized in that the woven fabric is comprised of cotton.
Claim 4
Dependent Claim
16 words
The flexible track of claim 1 wherein the woven fabric is a plurality of superposed plies.
Claim 5
Dependent Claim
23 words
The track of claim 1 wherein the woven fabric has at least 25 warp ends per inch and 25 pick ends per inch.
Claim 6
Dependent Claim
62 words
The flexible track as defined in claim 1 wherein the drive engaging means comprise at least one row of peripherally extending and longitudinally spaced discrete drive lugs protruding from the belt and, the slide rail bearing surface is disposed contiguously to the at least one row of lugs and extends over a portion of each lug in the at least one row.
Claim 7
Dependent Claim
43 words
The flexible track of claim 5 wherein the drive engaging means comprise a plurality of the rows of drive lugs, the rows transversely spaced with the at least one slide rail bearing surface being disposed between any two adjacent rows of the plurality.
Claim 8
Dependent Claim
26 words
The track of claim 5 wherein the woven fabric is made of cotton duck fabric woven from yarns having a twist multiplier of at least 4.
References Cited (Backward Citations)
US3118709A
Cited
US3480339A
Cited
US3761143A
Cited
US3722961A
Cited
US3774979A
Cited
US3815960A
Cited
US3781067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |