Patent US3738401A successfully refreshed from Google Patents.
US3738401A
Expired / Lapsed
US
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Apparatus for severing the root system of the tree from the trunk during the tree-felling operation
Assignee: Ostbergs Fabriks AB
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Filing: 1970-12-03
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Granted: 1973-06-12
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Expires: 1990-12-03
Abstract
Abstract An apparatus for severing the root system of a tree from the tree trunk during tree-felling comprising a gripping part, in operation being clamped to the trunk, and a cutting part for cutting of the roots. The cutting part includes a circular knife of interconnected knives arranged to encompass the trunk, and the cutting part is displaceable relative to the gripping part for cutting the roots, usually while pulling or pushing the tree upwards out of the ground in which part of the root system remains. Jacks or other power mechanism is used for moving the cutting part away from the gripping part fixed to the trunk. Timber is saved since no stump remains.
Inventors
- 👤 P Wiklund
- 👤 J Palm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:38
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
Apparatus for severing the root system of a tree from the trunk thereof, comprising a gripping part for clamping the tree trunk, a cutting part displaceable below and relative to said gripping part, said cutting part including a knife edge directed downward away from said gripping part, and said cutting part also including a ground support, and power means to move said cutting part and said gripping part away from each other along the trunk in the gripping position thereof while said ground support rests on the ground to force said knife edges through the root system of the tree, thereby to produce an increased end part of the trunk as merchantable timber in the root extension of the trunk.
Claim 2
Dependent Claim
120 words
Apparatus for severing the root system of a tree from the trunk thereof, comprising a gripping part for clamping the tree trunk, a cutting part displaceable below and relative to said gripping part, said cutting part including a knife edge directed downward away from said gripping part, and said cutting part also including a ground support, and power means to move said cutting part and said gripping part away from each other along the trunk in the gripping position thereof while said ground support rests on the ground to force said knife edges through the root system of the tree, thereby to produce an increased end part of the trunk as merchantable timber in the root extension of the trunk.
Claim 3
Dependent Claim
32 words
Apparatus as claimed in claim 1. and a cutting device that moves crossways to the tree trunk to cut off roots entrained by the tree trunk during the lifting of said trunk.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |