Patent US3756668A successfully refreshed from Google Patents.
US3756668A
Expired / Lapsed
US
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Endless track
Assignee: Gates Rubber Co
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Filing: 1971-06-16
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Granted: 1973-09-04
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Expires: 1991-06-16
Abstract
Abstract An endless track of the grouser-bar type having at least two flexible bands for mounting the grouser-bars in a spaced-apart relationship, the bands each having at least one row of spacedapart and longitudinally aligned lugs projecting from the inside surface of each band.
Inventors
- 👤 P Russ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:58
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
In a wheel substitute land vehicle of the type having an endless grouser-bar track supported by a slide-bar suspension system, the improvement in the track drive system which comprises: at least two endless bands of the reinforced polymeric type, said bands of substantially the same circumference and spaced side-by-side to have their longitudinal axes substantially parallel, and said bands having inner and outer surfaces; at least two transversely spaced and aligned rows of lugs integrally molded with and protruding from the inner surface of each band, said lugs of a row longitudinally spaced and aligned on said bands; longitudinally spaced grouser-bar means secured to the outer surface of said bands, holding said bands in spaced relationship and for transversely stiffening the track, the slide-bars of the suspension system engaging a portion of the grouser-bar means; and at least two drive wheels, each including means for meshing with said lugs of a band, each of said wheels arranged to engage the two rows of lugs of one of said bands, and said wheels adapted to propel the track.
Claim 2
Dependent Claim
177 words
In a wheel substitute land vehicle of the type having an endless grouser-bar track supported by a slide-bar suspension system, the improvement in the track drive system which comprises: at least two endless bands of the reinforced polymeric type, said bands of substantially the same circumference and spaced side-by-side to have their longitudinal axes substantially parallel, and said bands having inner and outer surfaces; at least two transversely spaced and aligned rows of lugs integrally molded with and protruding from the inner surface of each band, said lugs of a row longitudinally spaced and aligned on said bands; longitudinally spaced grouser-bar means secured to the outer surface of said bands, holding said bands in spaced relationship and for transversely stiffening the track, the slide-bars of the suspension system engaging a portion of the grouser-bar means; and at least two drive wheels, each including means for meshing with said lugs of a band, each of said wheels arranged to engage the two rows of lugs of one of said bands, and said wheels adapted to propel the track.
Claim 3
Dependent Claim
22 words
A flexible track as set forth in claim 1 wherein the spacing of said grouser-bars corresponds to the spacing of said lugs.
Claim 4
Dependent Claim
18 words
A flexible track as set forth in claim 2 wherein each grouser-bar is oppositely aligned with a lug.
Claim 5
Dependent Claim
25 words
A flexible track as set forth in claim 3 wherein said means includes a fastener that extends through a band and portion of each lug.
Claim 6
Dependent Claim
28 words
A flexible track as set forth in claim 1 and further including means on the outer surface of each band for longitudinally spacing and transversely aligning said grouser-bars.
Claim 7
Dependent Claim
29 words
A flexible track as set forth in claim 5 wherein said alignment means includes a plurality of spaced-apart tread bars projecting transversely from the outer surface of each band.
Claim 8
Dependent Claim
36 words
A flexible track as set forth in claim 6 wherein said tread bars project from the outer surface of each band to a point beyond said grouser-bars, said tread bars defining a plurality of terrain-engaging surfaces.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |