US4238116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skidder jack
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1979-06-25
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Granted: 1980-12-09
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Expires: 1999-06-25
Abstract
Abstract This invention consists of a front and rear lift mechanism or jack for lifting bogged down wheels of a skidder from ruts in the ground. It consists of a front and rear bracket each of which is equipped with a plurality of horizontal and vertical rollers which guide a cable from a winch on the skidder, away from the frame-work and body of the skidder when the cable is tied to a tree in the process of raising the bogged down skidder from the ruts in which it is stuck.
Inventors
- 👤 Jacques F. Plante
- 👤 Robert A. Plante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:57
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/28; B66D1/36; B66F; B66F19/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
216 words
A pair of lift mechanisms for lifting the wheels of a bogged down vehicle equipped with a winch having a cable wound thereon, said pair comprising a rear lift mechanism having a frame provided with fastening means to attach the frame to the back of the vehicle, two spaced, generally parallel and horizontal rear rollers having ends supported by said frame, one of said rear rollers raising the rear of the vehicle when the winch cable is passed thereunder and is taut, and two spaced, generally parallel guide means for guiding the winch cable carried by said frame and spaced from and at right angles to said rear rollers; said pair further comprising a front lift mechanism having a second frame with fastening means to attach the second frame to the front of the vehicle, a generally horizontal front roller having ends carried by said second frame and positioned generally parallel to said rear rollers, said front roller and the other of said rear horizontal rollers raising the front of said vehicle when the hoist cable is passed under the other of said rear horizontal rollers and under said front horizontal roller and is taut, and two front guide means carried by said second frame and spaced from said horizontal roller for guiding the winch cable.
Claim 2
Dependent Claim
216 words
A pair of lift mechanisms for lifting the wheels of a bogged down vehicle equipped with a winch having a cable wound thereon, said pair comprising a rear lift mechanism having a frame provided with fastening means to attach the frame to the back of the vehicle, two spaced, generally parallel and horizontal rear rollers having ends supported by said frame, one of said rear rollers raising the rear of the vehicle when the winch cable is passed thereunder and is taut, and two spaced, generally parallel guide means for guiding the winch cable carried by said frame and spaced from and at right angles to said rear rollers; said pair further comprising a front lift mechanism having a second frame with fastening means to attach the second frame to the front of the vehicle, a generally horizontal front roller having ends carried by said second frame and positioned generally parallel to said rear rollers, said front roller and the other of said rear horizontal rollers raising the front of said vehicle when the hoist cable is passed under the other of said rear horizontal rollers and under said front horizontal roller and is taut, and two front guide means carried by said second frame and spaced from said horizontal roller for guiding the winch cable.
Claim 3
Dependent Claim
32 words
A pair of lift mechanisms according to claim 1 characterized by said frame of said rear lift mechanism having a longitudinally-extending indentation along the bottom edge thereof for receiving the winch cable.
Claim 4
Dependent Claim
32 words
A pair of lift mechanisms according to claim 1 characterized by said frame of said front lift mechanism having a U-shaped indentation in the upper edge thereof for receiving the winch cable.
Claim 5
Dependent Claim
24 words
A pair of lift mechanisms according to claim 1 characterized by a top roller located above said rear rollers and to the rear thereof.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |