Patent ID: 6523344
Filing Date: 2003-02-25
Classification: F15B

Abstract:
A hydraulic switching device for controlling a pressurized pressure medium, comprising:at least two movable drive units for producing movement in a functional direction and in a counter-direction, said drive units each having at least two connection lines for application of the pressurized pressure medium; an externally controllable selector switches provided for controlling the pressurization of the pressure medium provided for each of said drive units, said externally controllable switches controlling application of the pressure medium to the connection lines of said at least two movable drive units with the exception that at least one connection line of the connection lines is kept pressurized throughout all switching positions of said externally controllable switches; and said connection lines of said at least two movable drive units being interconnected via at least one of logical AND and OR valve elements so that: operation of a first drive unit of said at least two movable drive units in the functional direction is possible while at the same time a force release of a second drive unit of said at least two movable drive units is effectable, and operation of the first drive unit in the counter direction is possible while at the same time operation of the second drive unit in the functional direction, in the counter direction and a force release mode is effectable.