Patent US3871427A successfully refreshed from Google Patents.
US3871427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for felling timber
Assignee: Individual
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Filing: 1973-10-29
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Granted: 1975-03-18
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Expires: 1993-10-29
Abstract
Abstract A timber-felling apparatus which draws a tree up with its roots the tree being first pulled out of the ground in a vertical direction and thereafter prized at an increasing angle thereto. The apparatus has means to cut off all or a portion of the roots attached to the tree during the pulling out thereof or after the tree has been pulled out.
Inventors
- 👤 Lars Harald Widegren
- 👤 Tage Oskar Keskitalo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:54
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/06; A01G23/062; A01G23/065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
An apparatus for felling timber by pulling up trees with their roots, comprising: a. at least one ground support member, b. at least one lever arm pivotally mounted to the ground support member at one end, c. a lifting device bearing upon the lever arm, d. at least one hydraulically operated gripping device coupled to the lever arm for gripping the tree trunk from the side, e. drive means coupled to the lifting and gripping devices, f. a driving source feeding said drive means, g. a plurality of cutting blades disposed in a plane perpendicular to the longitudinal axis of the tree, and movable to cut the tree from opposite sides thereof, and h. hydraulic means to move the blades to sever the roots from the tree.
Claim 2
Independent Claim
127 words
An apparatus for felling timber by pulling up trees with their roots, comprising: a. at least one ground support member, b. at least one lever arm pivotally mounted to the ground support member at one end, c. a lifting device bearing upon the lever arm, d. at least one hydraulically operated gripping device coupled to the lever arm for gripping the tree trunk from the side, e. drive means coupled to the lifting and gripping devices, f. a driving source feeding said drive means, g. a plurality of cutting blades disposed in a plane perpendicular to the longitudinal axis of the tree, and movable to cut the tree from opposite sides thereof, and h. hydraulic means to move the blades to sever the roots from the tree.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1 wherein one of the cutting blades is movable independently of the other.
Claim 4
Independent Claim
133 words
An apparatus for felling timber by pulling up trees with their roots, comprising: a. at least one ground support member, b. at least one lever arm pivotally mounted to the ground support member at one end, c. a lifting device bearing upon the lever arm, d. at least one hydraulically operated gripping device coupled to the lever arm for gripping the tree trunk from the side, e. drive means coupled to the lifting and gripping devices, f. a driving source feeding said drive means, g. a plurality of cutting blades of a semicylindrical shape with a cutting edge on one end, movable in a direction parallel to the longitudinal axis of the tree to sever the roots therefrom, and h. hydraulic means to move the blades to sever the roots from the tree.
Claim 5
Independent Claim
133 words
An apparatus for felling timber by pulling up trees with their roots, comprising: a. at least one ground support member, b. at least one lever arm pivotally mounted to the ground support member at one end, c. a lifting device bearing upon the lever arm, d. at least one hydraulically operated gripping device coupled to the lever arm for gripping the tree trunk from the side, e. drive means coupled to the lifting and gripping devices, f. a driving source feeding said drive means, g. a plurality of cutting blades of a semicylindrical shape with a cutting edge on one end, movable in a direction parallel to the longitudinal axis of the tree to sever the roots therefrom, and h. hydraulic means to move the blades to sever the roots from the tree.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 3 wherein one of the cutting blades is movable independently of the others.
Claim 7
Independent Claim
147 words
An apparatus for fellIng timber by pulling up trees with their roots, comprising: a. at least one ground support member, b. at least one lever arm pivotally mounted to the ground support member at one end, c. a lifting device bearing upon the lever arm, d. at least one hydraulically operated gripping device coupled to the lever arm for gripping the tree trunk from the side, e. drive means coupled to the lifting and gripping devices, f. a driving source feeding said drive means, g. a plurality of cutting blades each located in a different plane and wherein the angle between the planes of the blades and the longitudinal axis of the tree is less than 90 degrees and the blades move toward each other to sever the roots from the tree, and h. hydraulic means to move the blades to sever the roots from the tree.
Claim 8
Independent Claim
147 words
An apparatus for fellIng timber by pulling up trees with their roots, comprising: a. at least one ground support member, b. at least one lever arm pivotally mounted to the ground support member at one end, c. a lifting device bearing upon the lever arm, d. at least one hydraulically operated gripping device coupled to the lever arm for gripping the tree trunk from the side, e. drive means coupled to the lifting and gripping devices, f. a driving source feeding said drive means, g. a plurality of cutting blades each located in a different plane and wherein the angle between the planes of the blades and the longitudinal axis of the tree is less than 90 degrees and the blades move toward each other to sever the roots from the tree, and h. hydraulic means to move the blades to sever the roots from the tree.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |