Patent US2389090A successfully refreshed from Google Patents.
Patent US3987831A successfully refreshed from Google Patents.
US3987831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-skid stud for pneumatic vehicle tires
Assignee: Ugine Carbone
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Filing: 1975-07-01
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Granted: 1976-10-26
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Expires: 1995-07-01
Abstract
Abstract Anti-skid stud for road vehicle tires composed of a tungsten carbide rod enclosed in a sleeve. This sleeve, made of a plastic material, has a cylindrical or frustoconical stem with at least one flange flush with the tread, the diameter of the flange being greater than the largest diameter of the rest of the sleeve. This arrangement provides a high degree of stability of the projection of the carbide rod beyond the tire tread throughout the period of use.
Inventors
- 👤 Jean Walrave
- 👤 Jean Champiot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
B; B60; B60C; B60C11/00; B60C11/14; B60C11/16; B60C11/1643; B60C11/165
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
For use in road vehicle tires incorporating an outer road surface engaging tread, an anti-skid stud comprising a carbide rod enclosed in a sleeve made of a material which is self-destructible in operation, said sleeve being a single tube composed of cylindrical and/or frustoconical components, and an upper flange, said sleeve being anchorable completely within the tire with the upper flange having an outer face flush with the tire tread, the greatest diameter of said flange being larger than the greatest diameter of the remainder of the sleeve, said rod having an outer end projecting centrally outward from the outer face of said upper flange, the self-destructible nature of the material of the sleeve providing a stability in the projection of the stud throughout the wear life thereof.
Claim 2
Dependent Claim
128 words
For use in road vehicle tires incorporating an outer road surface engaging tread, an anti-skid stud comprising a carbide rod enclosed in a sleeve made of a material which is self-destructible in operation, said sleeve being a single tube composed of cylindrical and/or frustoconical components, and an upper flange, said sleeve being anchorable completely within the tire with the upper flange having an outer face flush with the tire tread, the greatest diameter of said flange being larger than the greatest diameter of the remainder of the sleeve, said rod having an outer end projecting centrally outward from the outer face of said upper flange, the self-destructible nature of the material of the sleeve providing a stability in the projection of the stud throughout the wear life thereof.
Claim 3
Dependent Claim
42 words
A stud in accordance with claim 1 wherein the part of the flange inward of the outer face is formed of a truncated cone or of an assembly of truncated cones with the small base pointed towards the interior of the tire.
Claim 4
Dependent Claim
30 words
A stud in accordance with claim 1 wherein the greatest diameter of the upper flange is between 1.2 and 1.5 times the greatest diameter of the rest of the sleeve.
Claim 5
Dependent Claim
24 words
A stud in accordance with claim 3 wherein the greatest diameter of the sleeve below the upper flange is between 4 and 8 mm.
Claim 6
Dependent Claim
21 words
A stud in accordance with claim 4 wherein the total height H of the sleeve is between 9 and 17 mm.
Claim 7
Dependent Claim
19 words
A stud in accordance with claim 5 wherein the height of the upper flange is between 0.1H and 0.5H.
Claim 8
Dependent Claim
29 words
A stud in accordance with claim 1 wherein the material used for the sleeve is a moldable thermoplastic material, the softening point of which is higher than 150° C.
Claim 9
Dependent Claim
53 words
A stud in accordance with claim 7 wherein the material used for the sleeve has a Shore hardness between about 3 to 5 times that of the rubber of the tire in which it is fitted, providing wear characteristics whereby the sleeve will wear at substantially the same rate as the tire tread.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |