Patent US4505984A successfully refreshed from Google Patents.
US4505984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite rubber-urethane tank track pads to improve service life
Assignee: Goodyear Tire and Rubber Co
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Filing: 1984-07-12
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Granted: 1985-03-19
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Expires: 2004-07-12
Abstract
Abstract A track segment for track vehicles composed of a metal plate or binocular part having at least one layer of an olefin or diolefin elastomer adhered thereto or covering said metal part and at least one or more layers of a polyurethane adhered to said elastomer, with at least an outer layer of polyurethane serving as part or all the ground contact or sole.
Inventors
- 👤 Gary J. Stelzer
- 👤 Calvin Harmon, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:26
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/06; B32B15/18; B32B25/00; B32B25/04; B32B25/08; B32B25/14; B32B27/00; B32B27/40; B32B3/00; B32B3/26; B32B3/30; B32B7/00; B32B7/04; B32B7/12; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/20; B62D55/205; B62D55/21; B62D55/211; B62D55/26; B62D55/275; B62D55/28; B32B2307/00; B32B2307/70; B32B2307/718; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31583; Y10T428/31587; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
25 words
A track segment having a metallic base with a diene or olefin elastomer adhered thereto and a sole member of polyurethane adhered to said elastomer.
Claim 2
Dependent Claim
25 words
A track segment having a metallic base with a diene or olefin elastomer adhered thereto and a sole member of polyurethane adhered to said elastomer.
Claim 3
Dependent Claim
26 words
The track segment of claim 1 wherein the sole member of polyurethane has holes through which the diene or olefin elastomer projects into the sole area.
Claim 4
Dependent Claim
25 words
The track segment of claim 1 wherein alternate layers of diene or olefin elastomer and polyurethane are used to give a sole member of polyurethane.
Claim 5
Dependent Claim
53 words
The track segment of claim 1 wherein the polyurethane is the reaction product of 1,5 naphthalene diisocyanate with a blend of polytetramethylene ether glycol of 800 to 1200 and 1800 to 2200 molecular weight and polycaprolactone of 1500 to 2500 molecular weight and cured with a glycol of bis(betahydroxyethyl)hydroquinone ether and trimethylol propane.
Claim 6
Dependent Claim
17 words
The track segment of claim 3 wherein the olefin or diolefin elastomer is selected from butadiene/styrene polymer.
Claim 7
Dependent Claim
17 words
The track segment of claim 4 wherein the olefin or diolefin elastomer is selected from butadiene/styrene polymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |