US3822730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for felling trees
Assignee: Hultdins Verkstads AB
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Filing: 1971-12-03
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Granted: 1974-07-09
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Expires: 1991-12-03
Abstract
Abstract The invention relates to an apparatus for machining trees, for example for pruning trees and/or felling trees. In particular, the invention refers to an apparatus for felling trees by separating from the trunk of a tree those roots and any root swelling extending peripherally outward from the trunk so that the same remain substantially in their original position under the ground. For this purpose the apparatus comprises a gripping member to hold the tree, a machining member provided with cutting means for machining the tree, one of said members being movably arranged on a frame through a longitudinal guide means immovably fixed to the frame, the other of said members being fixed to the frame which is in turn connected to a vehicle by means of crane or operating arms, and force transmitting means laterally spaced from the longitudinal guide means for moving said members away from each other along a line of movement guided by the longitudinal guide means.
Inventors
- 👤 G Hultdin
- 👤 O Hultdin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:25
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
254 words
An apparatus for felling trees by separating from the trunk of a tree those roots which extend peripherally outward therefrom so that those said roots remain substantially in their original position under the ground, said apparatus comprising a frame, means for flexibly mounting said frame to a vehicle for movement of said frame with respect to said vehicle, a first member consisting essentially of a gripping member supported by said frame and arranged to grip and hold the trunk of a tree during application of an upward lifting force on said gripping member, a second member consisting essentially of a machining member supported by said frame in spaced downward relationship from said gripping member, a longitudinal guide means immovably fixed to said frame and through which at least one of said first and second members is movably journalled to said frame, and foRcetransmitting means laterally spaced from said longitudinal guide means and operable to effect relative movement of said gripping member and said machining member longitudinally away from each other along a line of movement guided by said longitudinal guide means, said machining member being characterized by having downwardly projecting exposed cutting edges as the lowermost structural part thereof, said cutting edges being adapted to be positioned to substantially circumscribe the periphery of the trunk of the tree held by said gripping member and further being adapted to press into and sever those roots which extend peripherally outward from said trunk as said machining member is relatively moved longitudinally away from said gripping member.
Claim 2
Independent Claim
254 words
An apparatus for felling trees by separating from the trunk of a tree those roots which extend peripherally outward therefrom so that those said roots remain substantially in their original position under the ground, said apparatus comprising a frame, means for flexibly mounting said frame to a vehicle for movement of said frame with respect to said vehicle, a first member consisting essentially of a gripping member supported by said frame and arranged to grip and hold the trunk of a tree during application of an upward lifting force on said gripping member, a second member consisting essentially of a machining member supported by said frame in spaced downward relationship from said gripping member, a longitudinal guide means immovably fixed to said frame and through which at least one of said first and second members is movably journalled to said frame, and foRcetransmitting means laterally spaced from said longitudinal guide means and operable to effect relative movement of said gripping member and said machining member longitudinally away from each other along a line of movement guided by said longitudinal guide means, said machining member being characterized by having downwardly projecting exposed cutting edges as the lowermost structural part thereof, said cutting edges being adapted to be positioned to substantially circumscribe the periphery of the trunk of the tree held by said gripping member and further being adapted to press into and sever those roots which extend peripherally outward from said trunk as said machining member is relatively moved longitudinally away from said gripping member.
Claim 3
Dependent Claim
28 words
Apparatus according to claim 1, characterized in that said gripping member is fixed to said frame and that said machining member is movable in relation to said frame.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 1, characterized in that said gripping member consists essentially of a support and at least one gripping arm which is pivotable against said support.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 3, characterized in that said support is immovably fixed to said first member.
Claim 6
Dependent Claim
34 words
Apparatus according to claim 1, characterized in that pressure operated pistons are arranged in said gripping member and are adapted to be brought into contact with a tree trunk held by said gripping member.
Claim 7
Dependent Claim
20 words
Apparatus according to claim 1, characterized in that at least two said cutting edges are moveable relative to each other.
Claim 8
Dependent Claim
15 words
Apparatus according to claim 1, characterized in that said force-transmitting means comprises a hydraulic cylinder.
Claim 9
Dependent Claim
22 words
Apparatus according to claim 5, characterized in that said pressure pistons are brought into contact with a tree trunk by hydraulic means.
Claim 10
Dependent Claim
27 words
Apparatus according to claim 3, characterized in that said support has a recess adapted to receive said one gripping arm as it is pivoted against said support.
Claim 11
Dependent Claim
47 words
Apparatus according to claim 3, characterized in that said gripping member comprises two gripping arms, each of which is pivotably journalled at said support, said gripping member being provided with pressure pistons adapted to be brought into contact with a tree trunk held by said gripping member.
Claim 12
Dependent Claim
31 words
Apparatus according to claim 1, characterized in that said gripping member is provided with pressure plates arranged to be pressed into abuttment with the tree trunk by means of clamping arms.
Claim 13
Dependent Claim
31 words
Apparatus according to claim 6, characterized in that a link mechanism in the shape of a parallelogram supports at least one of said cutting edges for relative movement toward the other.
Claim 14
Dependent Claim
25 words
Apparatus according to claim 6, characterized in that a slide guide arrangement is provided for the movement of at least one of said cutting edges.
Claim 15
Dependent Claim
28 words
Apparatus according to claim 1 characterized in that the machining member comprises two arms, each said arm supporting a number of cutting edges pivotable on a vertical axis.
Claim 16
Dependent Claim
43 words
Apparatus according to claim 1, characterized in that said machining member comprises two arms movable with respect to each other, each said arm carrying at least one telescopic tube, and each said telescopic tube carrying a said cutting edge of said machining member.
Claim 17
Dependent Claim
28 words
Apparatus according to claim 1, characterized in that said machining member comprises two arms movable with respect to each other, each carrying a cutting edge having an angle-shape.
Claim 18
Dependent Claim
14 words
Apparatus according to claim 1, characterized in that said machining member carries chip breakers.
Claim 19
Dependent Claim
25 words
Apparatus according to claim 1, characterized in that stopping means limits the downward movement of said cutting edges before lifting of the tree is initiated.
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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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |