EP 0870931 B1 20010523 - Actuator with end-of-stroke-cushioning
Title (en)
Actuator with end-of-stroke-cushioning
Title (de)
Endlagengedämpfter Arbeitszylinder
Title (fr)
Vérin avec dispositif amortisseur de fin de course
Publication
Application
Priority
DE 29706364 U 19970410
Abstract (en)
[origin: US5953976A] An end dampened working cylinder for a fluid which serves as a fluid power medium for transmission of energy, the working cylinder comprising a main piston; control plungers carrying ring magnets and mounted on both sides of the main piston; springs form-locking the control plungers with the main piston and piston rod; sensors incorporated in a topside end and a bottom end and reacting to a contactless magnetic field, so that on approaching the ring magnet but at least on reaching a sealing rest position of the control plunger at each of the end stops a signal of a respective one of the sensors is generated and serves for controlling the fluid power, the control plungers sliding along the piston rod so as to provide adjustable and guaranteed sealing, outlet channels and a throttled flow-off channel, the control plungers serving as a shut-off component and valve for the outlet channels, so that when the control plungers rest on the topside end and the bottom end a dampening space is formed, from which a dampened fluid outlet through the throttled flow-off channel provides an external means of adjustment in form of a throttle adjustment screw.
IPC 1-7
IPC 8 full level
F15B 15/22 (2006.01); F15B 15/28 (2006.01)
CPC (source: EP US)
F15B 15/222 (2013.01 - EP US); F15B 15/223 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE FR GB IT NL
DOCDB simple family (publication)
US 5953976 A 19990921; AT E201483 T1 20010615; DE 29706364 U1 19970619; DE 59800746 D1 20010628; EP 0870931 A1 19981014; EP 0870931 B1 20010523
DOCDB simple family (application)
US 4788098 A 19980325; AT 98101226 T 19980124; DE 29706364 U 19970410; DE 59800746 T 19980124; EP 98101226 A 19980124