Patent US3899093A successfully refreshed from Google Patents.
US3899093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-tipping log skidder
Assignee: Caterpillar Inc
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Filing: 1973-04-18
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Granted: 1975-08-12
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Expires: 1993-04-18
Abstract
Abstract A log skidder has a pair of upper and lower rollers mounted rearwardly of a towing winch to receive a cable therefrom. In normal operation, the cable is solely guided over the upper roller whereas during the ascent of a steep grade, for example, the cable is further received under the lower roller to substantially decrease the tipping moment arm imposed on the log skidder.
Inventors
- 👤 Jan K Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:25
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/28; B66D1/36; B60; B60P; B60P3/00; B60P3/40; B60P3/41
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
A log skidder disposed on a longitudinal axis thereof comprising a frame, a towing winch mounted on said frame and having a cable wrapped thereon, first cable guide means mounted on and vertically above said frame and positioned rearwardly of said towing winch, said cable received and guided over said first cable guide means, and second cable guide means fixedly mounted on said frame substantially below said first guide means and constructed to define an opening for selectively permitting said cable to be placed thereunder from said first guide means to substantially shorten the tipping moment arm of said log skidder during selecteD phases of operation thereof, said second cable guide means comprising a roller rotatably mounted on and between a pair of first and second support brackets and wherein said first bracket is attached to said frame by releasable fastening means and said second bracket is pivotally mounted on said frame by pivot means whereby release of said releasable fastening means will permit said roller to be pivoted along with said second bracket about said pivot means on said frame to allow insertion of said cable under said roller.
Claim 2
Dependent Claim
190 words
A log skidder disposed on a longitudinal axis thereof comprising a frame, a towing winch mounted on said frame and having a cable wrapped thereon, first cable guide means mounted on and vertically above said frame and positioned rearwardly of said towing winch, said cable received and guided over said first cable guide means, and second cable guide means fixedly mounted on said frame substantially below said first guide means and constructed to define an opening for selectively permitting said cable to be placed thereunder from said first guide means to substantially shorten the tipping moment arm of said log skidder during selecteD phases of operation thereof, said second cable guide means comprising a roller rotatably mounted on and between a pair of first and second support brackets and wherein said first bracket is attached to said frame by releasable fastening means and said second bracket is pivotally mounted on said frame by pivot means whereby release of said releasable fastening means will permit said roller to be pivoted along with said second bracket about said pivot means on said frame to allow insertion of said cable under said roller.
Claim 3
Dependent Claim
17 words
The log skidder of claim 1 further comprising a bulldozer assembly mounted on a forward end thereof.
Claim 4
Dependent Claim
30 words
The log skidder of claim 1 wherein said frame comprises front and rear frames connected together by a vertically disposed pivot means, said towing winch mounted on said rear frame.
Claim 5
Dependent Claim
29 words
The log skidder of claim 1 wherein said first cable guide means comprises a roller rotatably mounted on a logging frame secured on the frame of said log skidder.
Claim 6
Dependent Claim
26 words
The log skidder of claim 4 wherein said roller is rotatably mounted on a box-like fairlead, secured on said logging frame to confine said cable therein.
Claim 7
Dependent Claim
26 words
The log skidder of claim 1 wherein said second cable guide means is disposed in at least substantial vertical alignment, below said first cable guide means.
Claim 8
Dependent Claim
41 words
The log skidder of claim 1 wherein said pivot means is at least generally disposed in alignment with the longitudinal axis of said log skidder to permit said roller to be pivoted vertically downwardly upon release of said releasable fastening means.
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |