Patent US4467849A successfully refreshed from Google Patents.
US4467849A
Expired / Lapsed
US
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Felling head
Assignee: Harricana Metal Inc
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Filing: 1982-05-28
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Granted: 1984-08-28
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Expires: 2002-05-28
Abstract
Abstract A felling head for use in harvesting trees. The felling head carries a pair of circular saws and means for positioning and gripping a tree to be felled. The saws are rotated and moved relative to the positioning and gripping means to, between them, cut through a positioned and gripped tree.
Inventors
- 👤 Jean Denis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:45
CPC Classifications
B; B23; B23D; B23D45/00; B23D45/10; B23D45/105; A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/091; B23D45/006; B23D45/02; B23D45/021; Y; Y10; Y10S; Y10S83/00; Y10S83/928; Y10T; Y10T83/00; Y10T83/768; Y10T83/7755; Y10T83/7763; Y10T83/7776; Y10T83/778
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A felling head for use in harvesting a stand of trees, the felling head having: means to position a tree to be cut; saw mounting means beneath the positioning means; a saw-carrying member movably mounted on the saw mounting means; the saw-carrying member having a pair of forwardly directed legs spaced apart to define a tree receiving slot therebetween; a circular saw mounted on the inner side of each leg and extending halfway into the slot to lie adjacent the other saw; means for rotating each saw; means for moving the saw-carrying member forwardly of the saw mounting means to saw through a tree positioned in the slot with both saws; each saw having a diameter generally half the diameter of the smallest single saw that would be needed to saw the same trees in the stand.
Claim 2
Dependent Claim
137 words
A felling head for use in harvesting a stand of trees, the felling head having: means to position a tree to be cut; saw mounting means beneath the positioning means; a saw-carrying member movably mounted on the saw mounting means; the saw-carrying member having a pair of forwardly directed legs spaced apart to define a tree receiving slot therebetween; a circular saw mounted on the inner side of each leg and extending halfway into the slot to lie adjacent the other saw; means for rotating each saw; means for moving the saw-carrying member forwardly of the saw mounting means to saw through a tree positioned in the slot with both saws; each saw having a diameter generally half the diameter of the smallest single saw that would be needed to saw the same trees in the stand.
Claim 3
Dependent Claim
40 words
A felling head as claimed in claim 1 wherein the two saws are mounted in the same plane with their axis of rotation parallel to each other, and with one saw slightly ahead of, and partially overlapping, the other saw.
Claim 4
Dependent Claim
16 words
A felling head as claimed in claim 1 wherein the positioning means comprise tree gripping means.
Claim 5
Dependent Claim
28 words
A felling head as claimed in claim 2 wherein the positioning means comprise a pair of vertically spaced-apart notched plates aligned with the slot in the saw-carrying member.
Claim 6
Dependent Claim
35 words
A felling head as claimed in claim 2 including a cover on the saw mounting means, the saw-carrying member being movable forwardly from a start position where the saw rotating means are beneath the cover.
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |