Patent US3857425A successfully refreshed from Google Patents.
US3857425A
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US
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Tree-felling device
Assignee: PER MARTIN WIKLUND MOSSTORPSVAGEN 40 2-183 30 TABY SWEDEN
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Filing: 1973-09-10
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Granted: 1974-12-31
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Expires: 1993-09-10
Abstract
Abstract The invention concerns a device for felling trees and/or cutting of wood with a saw-blade which is chiefly in the form of a spherical cap, or annular part thereof. The feed motion of the blade consists of a pendulous motion around the geometrical centre of the spherical cap.
Inventors
- 👤 P Wiklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:41
CPC Classifications
B; B27; B27B; B27B5/00; B27B5/14; A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/091; B27B33/00; B27B33/02; Y; Y10; Y10T; Y10T83/00; Y10T83/768; Y10T83/7755; Y10T83/7788; Y10T83/7793
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
Apparatus for felling trees and/or cutting wood with a saw blade, comprising a concave saw blade having a circular series of saw teeth about the periphery thereof, means mounting said saw blade for pendulous motion around the centroid of said concave blade, and means for rotating said saw blade about an axis passing through said centeroid.
Claim 2
Dependent Claim
56 words
Apparatus for felling trees and/or cutting wood with a saw blade, comprising a concave saw blade having a circular series of saw teeth about the periphery thereof, means mounting said saw blade for pendulous motion around the centroid of said concave blade, and means for rotating said saw blade about an axis passing through said centeroid.
Claim 3
Dependent Claim
30 words
Apparatus as claimed in claim 1, and a holder adapted to be fixed upon a tree trunk, said pendulous mounting means comprising a linkage suspending said blade from said holder.
Claim 4
Dependent Claim
26 words
Apparatus as claimed in claim 1, and a driving axle at the center of said saw blade on which said saw blade is mounted for rotation.
Claim 5
Dependent Claim
17 words
Apparatus as claimed in claim 1, said saw blade comprising an annular portion of a spherical cap.
Claim 6
Dependent Claim
38 words
Apparatus as claimed in claim 4, said saw teeth being on the outer periphery of said annular portion, and gear teeth on the inner periphery of said annular portion, and a driven gear engaged with said gear teeth.
Claim 7
Dependent Claim
17 words
Apparatus as claimed in claim 1, said mounting means being offset to one side of said blade.
References Cited (Backward Citations)
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Cited
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US3364964A
Cited
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |