Operation control method and device for construction machine
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United States of America Patent
Stats
-
Feb 5, 1991
Grant Date -
N/A
app pub date -
Feb 14, 1990
filing date -
Feb 14, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An operation control device for a construction machine is constructed of a remote control valve having a member moveable in proportion to an operating lever stroke and having a plurality of devices engaged with the member and operable in association therewith. A part of the plural devices include a proportional hydraulic signal generator for reducing a hydraulic pressure from a hydraulic pressure source in proportion to a moving quantity of the member and generating a signal as a pilot pressure, and a part or the other of the plural devices including a proportional electric signal generator for generating an electric signal proportional to the moving quantity of the member.
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