Patent US3630440A successfully refreshed from Google Patents.
US3630440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extract-o-lifter
Assignee: Individual
•
Filing: 1970-02-09
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Granted: 1971-12-28
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Expires: 1990-02-09
Abstract
Abstract A friction plate for placement under an automotive vehicle wheel so to gain traction when on ice or snow, the device comprising a woven mat with downward extending ice nails to hold against the ice, and upwardly extending nail heads for engaging the tire.
Inventors
- 👤 Ralf K Sams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:10
CPC Classifications
B; B60; B60B; B60B39/00; B60B39/02; B60B39/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A traction mat for vehicles comprising an elongated flexible mat having a portion of uniform thickness and inclined portion extending therefrom to a thin leading edge, said inclined portion having nail heads extending upwardly therefrom and said uniform portion having nail heads extending downwardly therefrom, in combination with a means for attaching the mat leading edge to the wheel in a removable fashion whereby wheel rotation causes the mat to be drawn forcibly under the wheel during wheel rotation.
Claim 2
Dependent Claim
79 words
A traction mat for vehicles comprising an elongated flexible mat having a portion of uniform thickness and inclined portion extending therefrom to a thin leading edge, said inclined portion having nail heads extending upwardly therefrom and said uniform portion having nail heads extending downwardly therefrom, in combination with a means for attaching the mat leading edge to the wheel in a removable fashion whereby wheel rotation causes the mat to be drawn forcibly under the wheel during wheel rotation.
Claim 3
Dependent Claim
41 words
A mat as in claim 1 wherein said means is a bar attachable to a wheel stud at one end and said mat includes a laterally projecting fixture with a vertical recess, adapted to receive the other end of said bar.
Claim 4
Dependent Claim
58 words
A mat as in claim 1 wherein the said means comprise a tether attached to said leading edge at one end and a spindle adapted to be mounted on the vehicle wheel axle, said tether being attached to said spindle whereby wheel rotation causes the tether to wrap around the spindle thereby drawing the mat under the wheel.
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |