US3762779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tread element for flexible track
Assignee: Gates Rubber Co
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Filing: 1971-03-26
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Granted: 1973-10-02
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Expires: 1991-03-26
Abstract
Abstract An improved tread element for endless flat track of the polymeric type having transverse ribs that form a tread pattern on the outer surface of the track. The tread element forms a nubbin or ''''button-like'''' protuberance extending away from or below the ribs. A plurality of upraised protuberances extend away from the tread ribs of the track, and define a plurality of surfaces which enhance transverse and longitudinal traction.
Inventors
- 👤 P Russ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:51
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/24; B62D55/244
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
In a flexible and endless track of the polymeric type having a tread formed thereon, the tread including a plurality of spaced apart, integrally molded tread ribs oriented generally transversely in relationship to the track and having a base adjacent the track and an outer surface extending away from the track, the improvement which comprises: a plurality of circumferentially spaced integrally molded tread elements upraised and extending at least one direction from adjacent said outer surface and integrally molded with the tread ribs generally longitudinally in relation to the track from the rib a predetermined amount and upraised below the tread rib outer surfaces, the tread elements defining a plurality of surfaces that enhance transverse and longitudinal traction of the track.
Claim 2
Dependent Claim
121 words
In a flexible and endless track of the polymeric type having a tread formed thereon, the tread including a plurality of spaced apart, integrally molded tread ribs oriented generally transversely in relationship to the track and having a base adjacent the track and an outer surface extending away from the track, the improvement which comprises: a plurality of circumferentially spaced integrally molded tread elements upraised and extending at least one direction from adjacent said outer surface and integrally molded with the tread ribs generally longitudinally in relation to the track from the rib a predetermined amount and upraised below the tread rib outer surfaces, the tread elements defining a plurality of surfaces that enhance transverse and longitudinal traction of the track.
Claim 3
Dependent Claim
33 words
A track as set forth in claim 1 wherein tread elements of successive tread ribs are longitudinally aligned in relation to the track to define at least one longitudinal row of tread elements.
Claim 4
Dependent Claim
31 words
A track as set forth in claim 1 wherein the tread elements are frusto-pyramidal in shape and arranged so the base of the pyramidal shaped tread elements is toward the track.
Claim 5
Dependent Claim
40 words
A track as set forth in claim 1 wherein the tread elements have a generally rectangular cross-section and the tread elements are arranged so the long side of the rectangular cross-section is aligned generally longitudinally in relation to the track.
Claim 6
Dependent Claim
40 words
A track as set forth in claim 1 wherein the tread elements are divided to define pairs, the tread elements of a pair oppositely skewed at generally equal but opposite angles in relation to the longitudinal axis of the track.
Claim 7
Dependent Claim
38 words
A track as set forth in claim 1 wherein the cumulative cross-sectional area of the tread elements which are upraised below a tread rib is no more than forty percent of the area of the tread rib base.
Claim 8
Dependent Claim
33 words
A track as set forth in claim 1 wherein the cumulative cross-sectional area of the tread elements which are upraised below a tread rib is generally ten percent of the tread rib base.
Claim 9
Dependent Claim
17 words
A track as set forth in cLaim 1 wherein the tread elements have a generally oval cross-section.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |