US3958613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tree and stump extraction
Assignee: LB Foster Co
•
Filing: 1974-09-09
•
Granted: 1976-05-25
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Expires: 1994-09-09
Abstract
Abstract A method and apparatus are provided for recovering stump and root systems in timber harvesting by exerting a vertical lifting force combined with simultaneously vibrating the trunk of a tree or stump being harvested.
Inventors
- 👤 Alvin E. Herz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:01
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/06; A01G23/062; A01G23/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
A method of tree and stump extraction comprising the steps of engaging the trunk of said tree and stump with a clamp means, exerting a vertical lifting force on the trunk of said tree and stump to be extracted through said engaging clamp means and simultaneously with exerting said vertical lifting force imparting, separate from the lift force, vibratory motion directly to said clamp means and thus to said trunk during extraction.
Claim 2
Independent Claim
72 words
A method of tree and stump extraction comprising the steps of engaging the trunk of said tree and stump with a clamp means, exerting a vertical lifting force on the trunk of said tree and stump to be extracted through said engaging clamp means and simultaneously with exerting said vertical lifting force imparting, separate from the lift force, vibratory motion directly to said clamp means and thus to said trunk during extraction.
Claim 3
Dependent Claim
41 words
A method as claimed in claim 1 wherein lateral roots of the tree and stump are sheared at a spaced point from the axis of the tree and stump prior to exerting the lifting force and vibratory motion to the tree.
Claim 4
Dependent Claim
27 words
A method as claimed in claim 2 wherein the lateral roots of the tree and stump are sheared in a circle around the axis of the tree.
Claim 5
Independent Claim
88 words
An apparatus for removing trees and stumps together with at least a portion of the root system comprising a mobile power source, clamp means extending from said power source and adapted to engage the trunk of a tree or stump to be removed, vibratory means directly attached only to said clamp to vibrate said tree or stump while in said clamp and lift means on the power source acting on said clamp lifting the clamp simultaneously with vibration of the clamp simultaneously to lift and vibrate during extraction.
Claim 6
Independent Claim
88 words
An apparatus for removing trees and stumps together with at least a portion of the root system comprising a mobile power source, clamp means extending from said power source and adapted to engage the trunk of a tree or stump to be removed, vibratory means directly attached only to said clamp to vibrate said tree or stump while in said clamp and lift means on the power source acting on said clamp lifting the clamp simultaneously with vibration of the clamp simultaneously to lift and vibrate during extraction.
Claim 7
Dependent Claim
16 words
An apparatus as claimed in claim 4 wherein the vibratory means is hydraulic eccentric weight actuated.
Claim 8
Dependent Claim
21 words
An apparatus as claimed in claim 4 wherein vertically movable shear means is provided on said clamp for shearing lateral roots.
Claim 9
Dependent Claim
13 words
An apparatus as claimed in claim 6 wherein the shear is vibratorily driven.
Claim 10
Dependent Claim
22 words
An apparatus as claimed in claim 6 wherein the shear is rotated about the axis of the tree or stump being extracted.
References Cited (Backward Citations)
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Cited
SU262538A1
Cited
US2735255A
Cited
US3110477A
Cited
US3433311A
Cited
US3774659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |