Hydraulically controlled valve comprising at least one hydraulic drive unit
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United States of America Patent
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Issued Date -
Jan 19, 2006
app pub date -
Aug 10, 2004
filing date -
Aug 27, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hydraulically controlled valve includes at lease one hydraulic drive unit that is provided with a control piston to which a control tappet is connected. The control tappet acts upon a flow control mechanism of the valve for controlling the flow of hydraulic oil from or to a consumer. The control piston can be moved towards a control spring by a control pressure P.sub.X. The control piston has a first step and a second step which have different diameters. A connection having a throttle point is provided between a primary control pressure chamber and a secondary control pressure chamber. The valve creates a throttle effect with the aid of which vibrations are dampened.
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