Power plants – Pressure fluid source and motor – Methods of operation
Patent
1997-01-10
1998-03-17
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Methods of operation
60459, 60469, 91361, 91435, F16D 3100, F16D 3900
Patent
active
057273871
ABSTRACT:
An apparatus for controllably moving an implement is provided. The implement is connected to a work machine and is movable between first and second implement positions in response to operation of a hydraulic actuator. The apparatus includes a joystick with first and second positions and a neutral position. The joystick is normally biased in a neutral position and is movable between the first and second positions. The apparatus senses the position of the joystick and responsively generates a joystick position signal. The joystick maintained at the first and second detent positions in response to manual movement of the joystick to the respective first and second detent positions. The joystick is released from the detent position in response to receiving a release detent signal. The apparatus senses the position of the work implement with respect to the work machine. The apparatus provides hydraulic fluid flow to the hydraulic actuator in response to a magnitude of an electrical valve signal. The apparatus receives the joystick position signal, responsively delivers the electrical valve signal. The magnitude of the electrical valve signal is proportional to the joystick position signal. The apparatus compares the implement position signal with a first detent position and a second detent position and responsively produces the release detent signal.
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Hosseini Javad
Schenkel Nathan T.
Schimpf James E.
Caterpillar Inc.
Nguyen Hoang
Yee James R.
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