Patent US4090540A successfully refreshed from Google Patents.
US4090540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tree cutting apparatus
Assignee: Individual
•
Filing: 1976-09-22
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Granted: 1978-05-23
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Expires: 1996-09-22
Abstract
Abstract A framework mounted on a tractor has separate vertically adjustable feet to support it from the ground at a desired angle of tilt so that a circular saw, slidable on the frame and driven from the tractor, can be moved downwardly and forwardly to sever a tree along a slanting plane below ground level. The frame has a member engageable with a side of the tree to resist the tendency of the frame to move laterally due to reaction from the cutting load on the saw. A hydraulic motor advances the saw while the tractor remains stationary.
Inventors
- 👤 Dale A. Smith
- 👤 Cyril Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:57
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/091; Y; Y10; Y10S; Y10S83/00; Y10S83/928; Y10T; Y10T83/00; Y10T83/667; Y10T83/768; Y10T83/7684; Y10T83/7693
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
206 words
Tree cutting apparatus comprising: a rigid frame having means at one end thereof for attachment to a powered vehicle; a trackway extending longitudinally of said frame; a carrier movable along said trackway and having a circular saw journalled thereon for rotation in a plane below said frame and trackway whereby said saw is movable to project its periphery beyond the other end of said frame; at least three vertically adjustable ground-engaging supports on said frame adjacent the ends thereof enabling said frame to be positioned stably on the ground to tilt at a selected angle extending downwardly toward said other end whereby said trackway directs said saw to engage a tree at ground level and sever said tree along an inclined cut below ground level, said vertically adjustable supports including separately adjustable supports including separately adjustable legs on opposite sides of said frame at said other end, said legs being spaced apart a distance greater than the diameter of said saw; means for rotating said saw concurrently with its movement along said trackway; and means for advancing said carrier and saw along said trackway toward said other end of said frame to project said saw between said supports and past said other end of said frame.
Claim 2
Dependent Claim
206 words
Tree cutting apparatus comprising: a rigid frame having means at one end thereof for attachment to a powered vehicle; a trackway extending longitudinally of said frame; a carrier movable along said trackway and having a circular saw journalled thereon for rotation in a plane below said frame and trackway whereby said saw is movable to project its periphery beyond the other end of said frame; at least three vertically adjustable ground-engaging supports on said frame adjacent the ends thereof enabling said frame to be positioned stably on the ground to tilt at a selected angle extending downwardly toward said other end whereby said trackway directs said saw to engage a tree at ground level and sever said tree along an inclined cut below ground level, said vertically adjustable supports including separately adjustable supports including separately adjustable legs on opposite sides of said frame at said other end, said legs being spaced apart a distance greater than the diameter of said saw; means for rotating said saw concurrently with its movement along said trackway; and means for advancing said carrier and saw along said trackway toward said other end of said frame to project said saw between said supports and past said other end of said frame.
Claim 3
Dependent Claim
52 words
Apparatus as defined in claim 1 wherein said trackway comprises laterally spaced tracks on said frame, said carrier having opposed followers movable along each of said tracks, and rigid telescoping means connecting said carrier to said frame and arranged to hold said carrier in predetermined orientation during its movement along said trackway.
Claim 4
Dependent Claim
44 words
Apparatus as defined in claim 1 wherein said vertically adjustable supports include a pair of vertically adjustable legs adjacent said one end of said frame and a ground engaging plate member pivoted to the lower end of said leg members on a transverse axis.
Claim 5
Dependent Claim
18 words
Apparatus as defined in claim 3 wherein said leg members are pivoted to said frame on transverse axes.
Claim 6
Dependent Claim
33 words
Apparatus as defined in claim 1 wherein said means for rotating said saw comprises a telescopic drive shaft having means thereon for drivingly connecting the same to a power take-off on said vehicle.
Claim 7
Dependent Claim
33 words
Apparatus as defined in claim 1 wherein said means for advancing said carrier comprises a hydraulic motor and means for supplying said motor with pressurized fluid from a source thereof on said vehicle.
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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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |