EP 0435196 A1 19910703 - Pressure converting device.
Title (en)
Pressure converting device.
Title (de)
Druckverstärkungseinrichtung.
Title (fr)
Dispositif de conversion de pression.
Publication
Application
Priority
JP 15133189 U 19891226
Abstract (en)
This pressure converting device comprises a primary cylinder (1); a secondary cylinder (2) disposed in line with and joined to the primary cylinder (1), a low-pressure-side piston (7) reciprocably fitted in the primary cylinder (1), a high-pressure-side piston (9) reciprocably fitted in the secondary cylinder (2), a piston rod (8) coaxially mounting the low-pressure-side piston and the high-pressure-side piston, a pilot-operated directional control valve (6) provided on a rear cover to supply the working fluid alternately to the front and rear chambers (A,B) of the primary cylinder (1), a pilot valve (5) for operating the directional control valve (6), and a shifting rod (11) for operating the pilot valve (5) which is connected to the rear piston rod (10) extending rearwardly from the low-pressure-side piston (7) and is concentrically accommodated in the pilot valve (5). Due to such construction, the diameter and the length of the primary cylinder (1) can be minimized thus making the pressure converting device extremely compact. <IMAGE>
IPC 1-7
IPC 8 full level
F04B 9/105 (2006.01); F04B 9/113 (2006.01); F15B 3/00 (2006.01)
CPC (source: EP)
F15B 3/00 (2013.01)
Citation (search report)
- [Y] US 3632230 A 19720104 - UEDA ATSUM
- [A] DE 3323902 C1 19840830 - HEMSCHEIDT MASCHF HERMANN
- [A] DE 904858 C 19540222 - WILHELM REPPEL
- [A] DE 2221388 A1 19721116 - BENDIX CORP
- [YP] SOVIET INVENTIONS ILLUSTRATED Section Mechanical, Week 9001, 14 February 1990, abstract no. 90-005711/01 Q/57, Derwent Publications Ltd., London, GB; & SU - A - 1488586 (SARYCHEV) 23.06.1989
Designated contracting state (EPC)
CH DE FR GB LI NL SE
DOCDB simple family (publication)
EP 0435196 A1 19910703; EP 0435196 B1 19941109; DE 69014089 D1 19941215; DE 69014089 T2 19950518; JP 2512551 Y2 19961002; JP H0387976 U 19910909
DOCDB simple family (application)
EP 90125101 A 19901221; DE 69014089 T 19901221; JP 15133189 U 19891226