Opto-sensor steering system for forklift truck
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United States of America Patent
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-
Aug 6, 1996
Grant Date -
N/A
app pub date -
Mar 22, 1994
filing date -
Mar 22, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electric forklift truck having a single motor which drives a pump which provides, via a priority valve, hydraulic fluid for both the working hydraulics and a steer unit on the truck. The motor is driven continuously at an idle speed in order to generate in the steer unit a dynamic load sensing signal to control the position of the priority valve. An optical sensor is associated with the steering column in order to provide an electric control signal to the motor controller to step up the speed of the motor in response to a steering demand.
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