Case Corporation

William L Ostler

Darrel J Svendsen

Patrick M Lourigan

Hermann H Regep

Ted W Gregory

Curtis A Halgrimson

William L Christopher

An auxiliary hydraulic system for a work vehicle which can be coupled to an auxiliary implement. The implement includes a hydraulic actuator and a sensor for generating a feedback signal to an implement controller, which in turn generates an automatic command signal. The system includes a fluid source, a coupler for fluidly coupling to the actuator, a control valve fluidly coupled to the source and the coupler to regulate the fluid flow between the source and the actuator in response to a valve command signal, an input device for generating a manual command signal, and a mode device for generating a mode signal. The system also includes an auxiliary control unit operable in first and second modes in response to the mode signal, which generates the valve command signal based on the manual command signal and the automatic control signal when operating in the first and second modes, respectively. The valve command signal is applied to the valve.

Automatic remote auxiliary implement control

A control lever assembly for generating an electrical signal representative of the position of a linearly-moveable control lever which extends through an elongated passage in a console cover includes a control lever guide rotatably mounted to a bracket beneath the console cover. An arm projecting above the console cover is provided for moving the guide between rotational positions. The guide has an opening with slots of predetermined length associated with the rotational positions which define ranges of linear movement of the control lever. The movement of the control lever causes a sensing circuit to generate the electrical signal representative of the position of the control lever. The assembly also includes a switch actuated by a cam on an end of the guide depending upon the rotational position of the guide. The assembly also includes detent mechanisms for releasably retaining the control lever and the guide in various detent positions.

Control lever assembly

An auxiliary hydraulic system for a working vehicle having an operator station is disclosed herein. The system includes a hydraulic pump for providing hydraulic fluid under pressure, auxiliary hydraulic fittings for connection to auxiliary attachments, and electrically-actuated auxiliary valve assemblies for controlling the supply of hydraulic fluid from the pump to the fittings in response to control signals. The system also includes an operator control console mounted at the operator station and including control levers moveable between different flow positions, flow limit input devices for setting flow limits for the control levers, and a console control circuit for generating command signals based upon the positions of the control levers and the flow limits. The command signals are transmitted to an auxiliary control circuit which generates the control signals in response thereto and applies the control signals to the auxiliary valve assemblies. Thus, the supply of fluid to the auxiliary valve fittings depends upon the positions of the control levers and the flow limits which are controlled by an operator from an integrated operator control console.

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Fargo, ND, United States of America

William L Ostler