Control valve system for the hydraulic work system of a work vehicle
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United States of America Patent
Stats
-
Nov 11, 2003
Grant Date -
Jul 5, 2001
app pub date -
Feb 27, 2001
filing date -
Feb 4, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A valve system is provided for the hydraulic work system of a work vehicle, in particular of an industrial truck, with a elevating drive system for raising and lowering a load and a tilting drive system, each of which can be actuated by a control valve, in particular by an electrically actuated control valve, the opening width of which determines the speed of movement of the user. The elevating drive system is realized in the form of a single-action hydraulic cylinder and a check valve in the form of a seat valve that can be opened toward the hydraulic cylinder is located in a hydraulic line leading from the control valve to the hydraulic cylinder. The tilting drive system is realized in the form of a double-action hydraulic cylinder. The valve system has an improved function with low energy losses.
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