EP 1074750 A3 20030604 - Pressure fluid actuator with damping and speed control device
Title (en)
Pressure fluid actuator with damping and speed control device
Title (de)
Druckmittelzylinder mit Enddämpfung und Geschwindigkeitssteuervorrichtung
Title (fr)
Vérin à fluide avec amortissement et dispositif de réglage de vitesse
Publication
Application
Priority
IT MI991751 A 19990804
Abstract (en)
[origin: EP1074750A2] The pressure fluid actuator (10) comprises a tubular body (11) and closing heads (12,13) to define a piston chamber (14) in which a piston (15) may reciprocate. The piston (15), at both ends, is provided with a damping bush (25) which may protrude into a flow damping chamber (18,19) in each closing head (12,13) connected to a fluid inlet/outlet port (16,17); a conduit (25A) comprising a flow throttling valve (23) is branched between each side of the piston chamber (14) and the damping chamber (18,19) in each closing head (12,13). The flow damping bush (25) comprises a longitudinally extending fluid supply duct (32) provided with a pressure actuated unidirectional flow control valve (30,32) which prevent the pressure fluid to flow from the piston chamber (14) into the damping chamber (18,19) during damping at the end of a piston stroke, while allowing flow circulation into the piston chamber (14) when the bush (25) is within the damping chamber (18,19) at the beginning of a piston stroke. <IMAGE>
IPC 1-7
IPC 8 full level
F15B 15/22 (2006.01)
CPC (source: EP)
F15B 15/222 (2013.01); F15B 15/223 (2013.01)
Citation (search report)
- [XY] GB 2009323 A 19790613 - PARISIENNE OUTILLAGE
- [X] DE 1039844 B 19580925 - PUMPENFABRIK URACH
- [X] DE 2027395 A1 19711209 - HENNECKE E
- [X] EP 0286777 A2 19881019 - HYDRAULIK ZUBEHOER GES FUER [DE]
- [AY] GB 2091841 A 19820804 - SHOWA MFG
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1074750 A2 20010207; EP 1074750 A3 20030604; CA 2314958 A1 20010204; IT 1313145 B1 20020617; IT MI991751 A0 19990804; IT MI991751 A1 20010204
DOCDB simple family (application)
EP 00116651 A 20000802; CA 2314958 A 20000803; IT MI991751 A 19990804