EP 0468788 A1 19920129 - Hydraulic booster device for linear actuator.
Title (en)
Hydraulic booster device for linear actuator.
Title (de)
Hydraulische Druckübersetzer für geradlinige Stellkolben.
Title (fr)
Dispositif multiplicateur hydraulique pour vérin rectiligne.
Publication
Application
Priority
US 55822890 A 19900726
Abstract (en)
A linear actuator 1 comprising: a housing 2 having a primary piston chamber 3 and a booster piston chamber 4; a piston rod 5 disposed within the housing 2; a primary piston 6 secured to one end of the piston rod 5 and disposed within the primary piston chamber 3, the primary piston chamber 3 having a first primary compartment 7 and a second primary compartment 8 disposed on opposite sides of the primary piston 6; a booster piston 9 movably disposed about the piston rod 5 and within the booster piston chamber 4, the booster piston chamber 4 having a first booster compartment 10 and a second booster compartment 11 disposed on opposite sides of the booster piston 9; a thrust column 12 attached to the booster piston 9 and disposed between the booster piston 9 and the piston rod 5 so as to define a fluid channel 16; a first port 13 capable of supplying or draining fluid or air to or from the first primary compartment 7 and the first booster compartment 10 concurrently, wherein the first primary compartment 7 and the first booster compartment 10 are in fluid contact via said fluid channel 16 disposed between the thrust column 12 and the piston rod 5; a second port 14 capable of supplying and draining fluid or air to or from the second primary compartment 8; and a third port 15 capable of supplying and draining fluid or air to or from the second booster 11 compartment. <IMAGE>
IPC 1-7
IPC 8 full level
F15B 15/14 (2006.01)
CPC (source: EP)
F15B 15/1409 (2013.01)
Citation (search report)
- [X] DE 2127181 B2 19720525
- [X] US 3018762 A 19620130 - KORB KARL W
- [X] GB 911709 A 19621128 - AUTOMOTIVE PROD CO LTD
- [A] GB 1432226 A 19760414 - SUPERFOS HYDRAULIC AS
- [A] FR 1155231 A 19580424 - AUTOMATIC VALVE ETS
- [A] NL 6701438 A 19680731
- [A] NL 108724 C
- [A] DE 3306846 A1 19840830 - NIEPENBERG HORST P [DE]
- [A] DE 1905577 A1 19700820 - ALBRECHT AUTOMATIK GMBH
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 91306788 A 19910725