US3690353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tree cross-cutting blade assembly
Assignee: Canadian Patents and Development Ltd
•
Filing: 1970-10-19
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Granted: 1972-09-12
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Expires: 1990-10-19
Abstract
Abstract Tree cross-cutting blade assembly are each trough-shaped with outwardly inclining sides leading from a bottom of the trough which slopes downward and terminates as the blade cutting edges. The blades are mounted for movement towards one another along paths which are substantially straight when viewed in a horizontal direction so that a portion of the tree between the troughs is compressed to alleviate splitting while it is being cut.
Inventors
- 👤 John S Johnston
- 👤 Andre St-Laurent
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; A01G23/087; A01G23/089
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
Tree cross-cutting blade assembly, wherein at least a portion of each blade is of uniform thickness and is trough-shaped with dependent lower sides, each trough having outwardly inclining sides leading upwardly from a trough bottom, with the trough bottom extending downwardly along an incline towards and terminating at a tree cutting edge of that blade, and the tree cutting edge forming an open end of that trough, and mounting means mounting the blades for movement towards one another along paths, which are substantially straight when viewed in an horizontal direction, for compressing a tree being cut by the cutting edges, in the troughs, by the top surface which is inclined with respect to the direction of motion, thereby causing more splitting of the portion of the tree adjacent the lower dependent sides than that adjacent the upper inclined sides of the blades.
Claim 2
Dependent Claim
142 words
Tree cross-cutting blade assembly, wherein at least a portion of each blade is of uniform thickness and is trough-shaped with dependent lower sides, each trough having outwardly inclining sides leading upwardly from a trough bottom, with the trough bottom extending downwardly along an incline towards and terminating at a tree cutting edge of that blade, and the tree cutting edge forming an open end of that trough, and mounting means mounting the blades for movement towards one another along paths, which are substantially straight when viewed in an horizontal direction, for compressing a tree being cut by the cutting edges, in the troughs, by the top surface which is inclined with respect to the direction of motion, thereby causing more splitting of the portion of the tree adjacent the lower dependent sides than that adjacent the upper inclined sides of the blades.
Claim 3
Dependent Claim
15 words
Tree cross-cutting blade assembly according to claim 1, wherein each trough is U-shaped in cross-section.
Claim 4
Dependent Claim
15 words
Tree cross-cutting blade assembly according to claim 1, wherein each trough is V-shaped in cross-section.
Claim 5
Dependent Claim
21 words
Tree cross-cutting blade assembly, according to claim 1, wherein each trough is tapered to increase in cross-section towards the cutting edge.
Claim 6
Dependent Claim
24 words
Tree cross-cutting blade assembly according to claim 1, wherein each trough terminates at a flat clamping portion of that blade for the mounting means.
References Cited (Backward Citations)
US3590894A
Cited
US3540501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |