Force matching tree shear

Details Force matching tree shear Force matching tree shear

1990-10-29

1991-09-03

Bray, W. Donald

Woodworking

Special-work machine

Tree felling

303795, 83604, 83605, 144339, A01G 2308

Patent

active

050444093

ABSTRACT:
A tree shear where the shear blade is moved by a power mechanism that includes a link and lever so arranged that the force available matches approximately, at all times, the force required to pass the shear blade through the tree to sever the same.

REFERENCES:
patent: 2129352 (1938-09-01), Haralson
patent: 3888287 (1975-06-01), Johnson
patent: 3946776 (1976-03-01), Oldenburg et al.
patent: 3995671 (1976-12-01), Wirt
patent: 4100951 (1978-07-01), Fischer
patent: 4131144 (1978-12-01), Fischer

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