Hydraulic control circuit for a delimbing apparatus

Details Hydraulic control circuit for a delimbing apparatus Hydraulic control circuit for a delimbing apparatus

1993-04-19

1994-03-15

Bray, W. Donald

Woodworking

Special-work machine

91183, 91446, 91468, 137628, 144 3C, 144343, 144356, A01G 2300, B27L 100, B27B 100

Patent

active

052939146

ABSTRACT:
A hydraulic control circuit for uniform controlled movement of stripping and guiding arms in a tree delimbing apparatus. A pair of flow divider combiner valves allow equal amounts of pressurized fluid to communicate with and actuate said cylinders. The piston rods of said cylinders are mechanically coupled to rotate tubular sleeve members with affixed stripping and guide arms between outward and inward positions. The flow divider combiner valves provide equal rates of said fluid to flow to said cylinders to insure said piston rods and mechanically affixed stripping arms and guide arms are moved at equal rates of speed. Thus the stripping levers and guide arms open and close about a felled tree in a uniform manner for delimbing operations.

REFERENCES:
patent: 2598233 (1952-05-01), Deardorff
patent: 3809134 (1974-05-01), McCabe
patent: 4124047 (1978-11-01), Dressler et al.
patent: 4749012 (1988-06-01), Hamby, Jr.
patent: 4898218 (1990-02-01), Linderholm
patent: 4898219 (1990-02-01), Pomies

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