EP 0273955 B1 19890927 - TWO-STAGE HYDRAULIC TELESCOPIC JACK
Title (en)
TWO-STAGE HYDRAULIC TELESCOPIC JACK
Publication
Application
Priority
DE 3622424 A 19860703
Abstract (en)
[origin: WO8800296A1] In order to be able to operate also in synchronism a two-stage telescopic, jack which can be used in an automatically-sequenced control mode, it is proposed to provide the first stage (12) of the telescopic jack with a top plate (126), to short-circuit the annular space (114) of the first stage (12) with the inner space (133) of the second stage (13) cut off by the top plate (126) of the first stage, and to provide a third pressurized line (23) connected to the annular space (124/124') of the second stage, formed by the short-circuited partial regions (124/124') produced by the top plate (126) of the first stage (12), said connection being effected via a telescopic feed-through (1131, 1232) extending between the base (111) of the jack (11) and the top plate (126) of the first stage (12); it must naturally be ensured that the annular space (114) of the first stage (12) and the inner space (133) of the second stage (13) are of equal volume.
IPC 1-7
IPC 8 full level
C22C 38/38 (2006.01); B66C 23/687 (2006.01); B66F 3/28 (2006.01); B66F 9/06 (2006.01); F15B 15/16 (2006.01)
CPC (source: EP KR US)
F15B 15/16 (2013.01 - EP KR US); F15B 15/1466 (2013.01 - EP US)
Citation (examination)
DE 1107383 B 19610525 - RHEINSTAHL SIEGENER EISENBAHNB
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 3622424 A1 19880114; DE 3760633 D1 19891102; EP 0273955 A1 19880713; EP 0273955 B1 19890927; JP H01500609 A 19890301; KR 880701839 A 19881105; SU 1705398 A1 19920115; US 4852464 A 19890801; WO 8800296 A1 19880114
DOCDB simple family (application)
DE 3622424 A 19860703; DE 3760633 T 19870702; DE 8700297 W 19870702; EP 87904488 A 19870702; JP 50413687 A 19870702; KR 880700208 A 19880226; SU 4807144 A 19900130; US 15572288 A 19880128