EP 0017592 B1 19831102 - HYDRAULIC ACTUATING DEVICE WITH FIVE POSITIONS
Title (en)
HYDRAULIC ACTUATING DEVICE WITH FIVE POSITIONS
Publication
Application
Priority
FR 7908814 A 19790406
Abstract (en)
[origin: US4319609A] Hydraulic actuating apparatus with digital input comprising a movable output member spring biased to a neutral position and capable of moving to one or other of two working positions under the effect of opposing hydraulic means, themselves controlled by binary-type control members; To create two additional working positions for the movable output member (10), the invention provides for each of the driving means to be composed of two active areas (s1, s'1; s2, s'2) acting successively on the output member (10), and for the putting of the first area under pressure to be caused by one of the control members (EV1, EV2) while that of the other area is caused by the other control member provided that the output member has already completed a first displacement step in the required direction; Particular application to the control of double-acting hydraulic actuators with two rates of displacement in each direction.
IPC 1-7
IPC 8 full level
F16K 11/07 (2006.01); F15B 11/12 (2006.01); F15B 11/13 (2006.01); F15B 13/04 (2006.01); F15B 13/043 (2006.01); F16K 31/42 (2006.01)
CPC (source: EP US)
F15B 11/121 (2013.01 - EP US); F15B 11/123 (2013.01 - EP US); F15B 11/13 (2013.01 - EP US); F15B 13/0402 (2013.01 - EP US); Y10T 137/86606 (2015.04 - EP US); Y10T 137/86614 (2015.04 - EP US); Y10T 137/8663 (2015.04 - EP US)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
EP 0017592 A1 19801015; EP 0017592 B1 19831102; DE 3065442 D1 19831208; FR 2453306 A1 19801031; FR 2453306 B1 19860314; JP H0114474 B2 19890313; JP S55135271 A 19801021; US 4319609 A 19820316
DOCDB simple family (application)
EP 80400457 A 19800404; DE 3065442 T 19800404; FR 7908814 A 19790406; JP 4369580 A 19800404; US 13774080 A 19800407