Auto-return function for a bulldozer ripper

Details Auto-return function for a bulldozer ripper Auto-return function for a bulldozer ripper

1996-09-05

1997-11-11

Melius, Terry Lee

Earth working

Automatic power control

172699, A01B 63111

Patent

active

056853777

ABSTRACT:
An apparatus controls the movement of a ripper for a machine. Tilt and lift cylinders controllably actuate the ripper. Hydraulic control valves control the flow of hydraulic fluid to the respective cylinder. An auto-return button produces an auto-return signal in response to being depressed by the machine operator. A controller receives the auto-return signal and delivers a ripper control signal to the hydraulic control valves to automatically raise the ripper to a predetermined position.

REFERENCES:
patent: 4044838 (1977-08-01), Wooldridge
patent: 4934463 (1990-06-01), Ishida et al.
patent: 5088020 (1992-02-01), Nishida et al.
patent: 5293944 (1994-03-01), Matsumoto
patent: 5386877 (1995-02-01), Codina et al.
patent: 5462125 (1995-10-01), Stratton et al.
patent: 5467829 (1995-11-01), Barton et al.

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