EP 0110024 B1 19870603 - DEVICE FOR CHANGING THE FORCE ACTING ON AN ACTUATOR
Title (en)
DEVICE FOR CHANGING THE FORCE ACTING ON AN ACTUATOR
Publication
Application
Priority
DE 3244920 A 19821204
Abstract (en)
[origin: ES8501852A1] A force transmitting fluid actuator for use with a control device wherein an actuator member, movable within an actuator housing, actuates the control device due to the urging force of a plurality of pistons which can be selectively pressurized in unitary increments. The plurality of pistons are disposed within pressure chambers formed in the actuator housing in a symmetrical ring-shaped arrangement concentric to a single pressure chamber disposed on the vertical axis of the housing. A number of passageways interconnect the plurality of pressure chambers to form groupings of pressure chambers which act simultaneously in response to operation of a solenoid valve associated with each passageway. In addition to the symmetrical arrangement of the pressure chambers, the valve and passageway arrangement provide for a symmetric pressurization of the pressure chambers thereby resulting in a balanced force being exerted on the actuator. The amount of force each piston can exert on the actuator is limited by a piston stop designed to contact a portion of the housing while the actual piston force is transmitted by a spring disposed between each piston and the actuator. In this manner, fluctuations in the pressurizing force are not transmitted from the piston to the actuator.
IPC 1-7
IPC 8 full level
F16K 31/40 (2006.01); F15B 11/02 (2006.01); F15B 15/02 (2006.01); F16K 31/42 (2006.01)
CPC (source: EP US)
F15B 11/02 (2013.01 - EP US); F15B 2211/50554 (2013.01 - EP US); F15B 2211/526 (2013.01 - EP US); F15B 2211/55 (2013.01 - EP US); F15B 2211/7053 (2013.01 - EP US); F15B 2211/76 (2013.01 - EP US); Y10T 137/86919 (2015.04 - EP US)
Citation (examination)
DE 2531904 A1 19770120 - ELMEG
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0110024 A1 19840613; EP 0110024 B1 19870603; AT E27639 T1 19870615; DE 3244920 A1 19840607; DE 3371931 D1 19870709; ES 526471 A0 19841201; ES 8501852 A1 19841201; JP H0429912 B2 19920520; JP S59110905 A 19840627; US 4531548 A 19850730
DOCDB simple family (application)
EP 83108660 A 19830902; AT 83108660 T 19830902; DE 3244920 A 19821204; DE 3371931 T 19830902; ES 526471 A 19831014; JP 22709283 A 19831202; US 55757283 A 19831202