US3565141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically actuated three-shear blade shearing device for felling trees
Assignee: Athey Products Corp
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Filing: 1969-04-21
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Granted: 1971-02-23
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Expires: 1989-04-21
Abstract
Abstract A timber-shearing apparatus for harvesting timber employs a main sliding, wedge blade which cooperates with a pair of smaller, pivotal blades all of which are remotely actuated by a common fluid cylinder and which collectively act to both center the tree and effect the shearing.
Inventors
- 👤 Alex J Galis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/08; A01G23/087
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
201 words
A tree-shearing apparatus, comprising: a. mobile support means having a remotely adjustably positionable boom mounted thereon; b. a frame supported and remotely adjustably positionable on said boom; c. a set of shear blades operably supported by said frame and including a main shear blade and a pair of auxiliary shear blades, said auxiliary blades being disposed forwardly and outwardly of said main shear blade, all said blades being arranged to operate in substantially the same common plane aNd having respective opposed cutting edges, said main shear blade being adapted to move on said frame along a fixed linear path centrally thereof, and said auxiliary blades each being adapted to pivot on said frame in arcuate paths around pivotal points located laterally of said linear path; and d. remotely controllable actuating and linkage means mounted on said frame and being effective upon the presence of a tree section being positioned so as to be within and effectively surrounded by said blades to cause said main shear blade to move forwardly along said linear path and each said auxiliary blade to simultaneously pivot rearwardly along its respective arcuate path and toward said main shear blade to thereby effect shearing of said tree section.
Claim 2
Dependent Claim
201 words
A tree-shearing apparatus, comprising: a. mobile support means having a remotely adjustably positionable boom mounted thereon; b. a frame supported and remotely adjustably positionable on said boom; c. a set of shear blades operably supported by said frame and including a main shear blade and a pair of auxiliary shear blades, said auxiliary blades being disposed forwardly and outwardly of said main shear blade, all said blades being arranged to operate in substantially the same common plane aNd having respective opposed cutting edges, said main shear blade being adapted to move on said frame along a fixed linear path centrally thereof, and said auxiliary blades each being adapted to pivot on said frame in arcuate paths around pivotal points located laterally of said linear path; and d. remotely controllable actuating and linkage means mounted on said frame and being effective upon the presence of a tree section being positioned so as to be within and effectively surrounded by said blades to cause said main shear blade to move forwardly along said linear path and each said auxiliary blade to simultaneously pivot rearwardly along its respective arcuate path and toward said main shear blade to thereby effect shearing of said tree section.
Claim 3
Dependent Claim
34 words
A tree-shearing apparatus as claimed in claim 1 wherein said actuating and linkage means includes and is adapted to be operated with the employment of a single fluid actuated cylinder mounted on said frame.
Claim 4
Dependent Claim
64 words
A tree-shearing apparatus as claimed in claim 1 wherein said actuating and linkage means includes a single fluid actuated cylinder mounted on said frame and connected to operate said main shear blade and includes linkage connecting said main shear blade and said auxiliary shear blade such that said linear movement of said main shear blade effects said arcuate movements of said auxiliary shear blades.
Claim 5
Dependent Claim
39 words
In a tree-shearing apparatus as claimed in claim 1 wherein said main shear blade is tapered to provide increasing thickness rearwardly of the shearing edge thereof and during shearing to effect a lifting action on said section being sheared.
Claim 6
Dependent Claim
43 words
In a tree-shearing apparatus as claimed in claim 4 wherein the shearing edge of said main shear blade comprises a pair of substantially straight edges which diverge rearwardly and the respective shearing edges of said auxiliary shear blades each comprise substantially arcuated edges.
Claim 7
Dependent Claim
42 words
In a tree-shearing apparatus as claimed in claim 1 wherein said frame provides an inwardly curved surface adapted to abut said section and in cooperation with said linear and arcuate movements of said blades to center said section preparatory to being sheared.
Claim 8
Dependent Claim
34 words
In a tree-shearing apparatus as claimed in claim 1 wherein said blades are arranged such that the said shearing edges thereof at least slightly overlap when in the final stage of shearing said section.
Claim 9
Dependent Claim
18 words
In a tree-shearing apparatus as claimed in claim 2 wherein said fluid actuated cylinder comprises a hydraulic cylinder.
Claim 10
Dependent Claim
36 words
In a tree-shearing apparatus as claimed in claim 1 wherein said adjustably positionable boom and frame adapt said set of shear blades for forward and rearward, up and down, right and left and rotary positioning movements.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |