Document Type and Number:
Japanese Patent JPH059642
Kind Code:
B2
Abstract:
Disclosed is an arrangement that includes a piston cylinder unit having pressure chamber in which fluid acts in opposition to a spring piston combination, a pressure generator and a fluid conduit extending between a tank and the tank. A first and a second valve are connected in series between the pressure generator and tank with the pressure chamber being in fluid communication with the connection between the valves. In known arrangements of the above type there is dead play wherein not every control signal corresponds to a defined position of the piston in the cylinder. However as disclosed herein the setting accuracy is improved by a throttle in parallel with valve that is fluidly connected between the pressure chamber and the piston cylinder unit. Also third and fourth valves may be connected in series between the pressure generator and tank and have a fluid connection between the third and fourth valves to the unit pressure chamber that is opposite the first chamber to provide a bridging circuit.
Inventors:
KIERUDO RAFUN
Application Number:
JP948290A
Publication Date:
February 05, 1993
Filing Date:
January 18, 1990
Export Citation:
Assignee:
DANFOSS AS
International Classes:
F15B9/09; F15B11/00; F15B13/043
Next Patent: JPS59643