Hydraulic circuit for tree harvesting implement

Details Hydraulic circuit for tree harvesting implement Hydraulic circuit for tree harvesting implement

1975-11-03

1977-08-02

Cohen, Irwin C.

Woodworking

Special-work machine

Tree felling

60421, 91 29, 91411R, 91412, 144309AC, A01G 2308, F15B 1120

Patent

active

040390101

ABSTRACT:
A hydraulic circuit for a tree harvesting implement having a cutter mounted on a movable frame with a hydraulic ram moving the frame and a hydraulic motor driving the cutter is disclosed herein. The hydraulic circuit includes two separate pressurized fluid sources with one source connected to one end of the fluid ram and the second source connected to the hydraulic motor as well as the opposite end of the fluid ram with both conduit means having pressure relief valves that are settable so that the frame is moved as a function of the resistance encountered by the cutter and/or the movable frame.

REFERENCES:
patent: 1103036 (1914-07-01), Clark
patent: 2101021 (1937-12-01), Daly
patent: 3313316 (1967-04-01), Thomas
patent: 3730207 (1973-05-01), Christensen
patent: 3774696 (1973-11-01), Horsch
patent: 3848648 (1974-11-01), Dika et al.
patent: 3902538 (1975-09-01), Muirhead
patent: 3922855 (1975-12-01), Bridwell

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