Hydraulic interblock system

US5577876A · kind A · utility

Assignee

• CLARK EQUIPMENT COMPANY · US

Inventors

• Thomas Q. Haeder · Lisbon, US
• Larry E. Albright · Gwinner, US
• Orlan J. Loraas · Lisbon, US
• William C. Shelbourn · Bismarck, US
• Gerald M. Berg · Lisbon, US
• Lyle L. Johnson · Lisbon, US
• Thomas M. Sagaser · Gwinner, US
• Knute K. Brock · Bismarck, US

Key dates

• Filing date: Feb 22, 1994
• Grant date: Nov 26, 1996
• Expiry date: Feb 22, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R2021/0206
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A control apparatus controls movement of a lift arm and tool on a skid steer loader. Power actuators are coupled to the lift arm circuit and the tool circuit for moving the lift arm and tool along a path. A sensor is coupled to the skid steer loader for sensing a desired parameter and providing a signal indicative of the desired parameter. A power interrupter is coupled between the power actuators for the lift arm and tool and the sensor and interrupts power to the actuators based on the signal. A manually operable bypass mechanism is coupled to the power interrupter and the power actuators and is used to bypass the power interrupter to allow movement of the lift arm.