Woodworking – Special-work machine – Tree felling
Patent
1975-04-08
1976-03-30
McGehee, Travis S.
Woodworking
Special-work machine
Tree felling
144 3D, A01G 2308
Patent
active
039467767
ABSTRACT:
A dual shear blade assembly for cutting through an article includes a frame having an outwardly opening article receiving slot therein, a first shear blade arrangement pivotally mounted on the frame and movable between an open position outwardly adjacent one side of the slot to a closed position within the slot, a second shear blade arrangement pivotally mounted on the frame and movable between an open position outwardly adjacent the opposite side of the slot to a closed position within the slot, a linkage apparatus which pivotally interconnectably couples the first and second shear blade arrangements for coordinated closing movement and separating opening movement thereof, and a motoring device pivotally connected to the frame and one of the first and second shear blade arrangements for powerably closing it, and thereby also the other one of said first and second shear blade arrangements for cleanly severing the article disposed in the slot.
REFERENCES:
patent: 3503429 (1970-03-01), Whisler
patent: 3509922 (1970-05-01), Lundberg
patent: 3565141 (1971-02-01), Galis
patent: 3627003 (1971-12-01), Kessler et al.
patent: 3731720 (1973-05-01), Moser et al.
Fischer Robert L.
Oldenburg Dorrance
Bray W. D.
Caterpillar Tractor Co.
Lanchantin, Jr. Charles E.
McGehee Travis S.
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