Patent US3664446A successfully refreshed from Google Patents.
Patent US3749309A successfully refreshed from Google Patents.
US3749309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traction pads
Assignee: Individual
•
Filing: 1971-01-18
•
Granted: 1973-07-31
•
Expires: 1991-01-18
Abstract
Abstract Two traction pads are formed with lugs which bite into ice or snow. The pads are connected together by chains having a length such that the chains are taut when one pad is under a front wheel of an auto and the other pad is under the rear wheel of the auto. This way, the weight of the car on the front pad keeps the traction force of the rear wheels from flinging the traction pad out from under the wheels and behind the car.
Inventors
- 👤 R Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:56
CPC Classifications
B; B60; B60B; B60B39/00; B60B39/02; B60B39/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
226 words
A pair of free lying traction pads, one of said pads being interconnected to a whiffletree by two chains, the other of said pads having a third chain which connects to a center point of said whiffletree, said chains having a combined length which approximately corresponds to the wheel base length of an auto, each of said free lying pads comprising a flexible sheet having ground gripping lugs thereon, means for removably attaching one of said two chains to an end of said whiffletree whereby said traction pad may be applied to an auto by detaching said one chain, initially laying said pads on the ground with one pad being in front of a front and another pad in front of a back wheel, with said one chain passing on one side of said front wheel and the other chain passing on the other side of said front wheel, and then reattaching said one chain, means for adjusting the length of said third chain to exactly correspond to the distance between the wheels on said auto, wherein said whiffletree interconnects said two chains in spaced parallel relationship, said third chain running from the other of said pads, and said length adjusting means comprises means for attaching said third chain to a connector at the center of said whiffletree at a selected link of said third chain.
Claim 2
Dependent Claim
226 words
A pair of free lying traction pads, one of said pads being interconnected to a whiffletree by two chains, the other of said pads having a third chain which connects to a center point of said whiffletree, said chains having a combined length which approximately corresponds to the wheel base length of an auto, each of said free lying pads comprising a flexible sheet having ground gripping lugs thereon, means for removably attaching one of said two chains to an end of said whiffletree whereby said traction pad may be applied to an auto by detaching said one chain, initially laying said pads on the ground with one pad being in front of a front and another pad in front of a back wheel, with said one chain passing on one side of said front wheel and the other chain passing on the other side of said front wheel, and then reattaching said one chain, means for adjusting the length of said third chain to exactly correspond to the distance between the wheels on said auto, wherein said whiffletree interconnects said two chains in spaced parallel relationship, said third chain running from the other of said pads, and said length adjusting means comprises means for attaching said third chain to a connector at the center of said whiffletree at a selected link of said third chain.
References Cited (Backward Citations)
US1324706A
Cited
US1324291A
Cited
US1325088A
Cited
US1354826A
Cited
US1375666A
Cited
US1432447A
Cited
US3008643A
Cited
US3152761A
Cited
US3350013A
Cited
US3425624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |