Global patent index - EP 1074750 A2

EP 1074750 A2 2001-02-07 - 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

EP 1074750 A2 (EN)

Application

EP 00116651 A

Priority

IT MI991751 A

Abstract (en)

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 (main, further and additional classification)

F15B 15/22

IPC 8 full level (invention and additional information)

F15B 15/22 (2006.01)

CPC (invention and additional information)

F15B 15/222 (2013.01); F15B 15/223 (2013.01)

Citation (applicant)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1074750 A2 20010207; EP 1074750 A3 20030604; CA 2314958 A1 20010204; IT 1313145 B1 20020617; IT MI991751 A1 20010205; IT MI991751 D0 19990804

INPADOC legal status

2003-09-10 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030304

2003-06-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2003-06-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Extension state: AL LT LV MK RO SI

2001-02-07 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-02-07 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI