Method and apparatus for controlling an implement of a work machine

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United States of America Patent

PATENT NO 5737993
SERIAL NO

08668783

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An apparatus for controllably moving a work implement is disclosed. The implement is connected to a work machine and is moveable in response to operation of a hydraulic cylinder. The apparatus includes an operator controlled joystick. A joystick position sensor senses the position of the joystick and responsively generates an operator command signal, which is indicative of a desired velocity. A velocity sensor senses the velocity of the lift cylinder and tilt cylinders and responsively producing respective cylinder velocity signals. A microprocessor receives the cylinder velocity and operator command signals, determines the difference between the actual and desired cylinder velocity, and responsively produces an electrical valve signal in response to the velocity difference. An electrohydraulic valve receives the electrical valve signal, and controllably provides hydraulic fluid flow to the hydraulic cylinder in response to a magnitude of the electrical value signal.

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Patent Owner(s)

Patent OwnerAddress
CATERPILLAR INC100 NE ADAMS STREET PEORIA IL 61629

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cobo, Michael A St. Charles, IL 10 164
Duffy, John D Peoria, IL 10 208

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