EP 0335504 A1 19891004 - Lifting cylinder which can be actuated by pressure fluid, preferably for ventilating devices.

Title (en)

Lifting cylinder which can be actuated by pressure fluid, preferably for ventilating devices.

Title (de)

Mittels Druckfluid aktivierbarer Hubzylinder, insbesondere für Lüftungsklappen.

Title (fr)

Cylindre de levage activé par un fluide sous pression, particuliairement pour clapets de ventilation.

Publication

EP 0335504 A1 19891004 (EN)

Application

EP 89301992 A 19890228

Priority

DE 3814003 A 19880426
DE 8804119 U 19880326

Abstract (en)

The invention relates to a lifting clyinder (1) which can be actuated by pressure fluid, preferably for the opening and closing of ventilating devices such as ventilation flaps for example, having a working piston (6) which is disposed on a longitudinally movable lifting rod (8) and is guided for movement in a working pressure chamber (5) comprising a pressure-fluid inlet and having a detent member (13) which is aligned perpendicular to the longitudinal axis (9) of the lifting rod and can be spring loaded, to lock the lifting rod in the end stroke position. The lifting rod has a contact member (17) which is loaded by a spring (22) and which can be supported against a stop (21) in an intermediate stroke position and can be transferred, by an end stroke movement overcoming the action of the spring (22), into its end stroke position when a preset operating pressure is exceeded. In a further embodiment a pair of working pistons (6.1, 6.2) (Fig. 2) on a common lifting rod (8) is movable to an end stroke position overcoming the action of a telescopic spring stop (21).

IPC 1-7

A62C 3/14; F15B 15/24

IPC 8 full level

A62C 2/06 (2006.01); A62C 2/24 (2006.01); F15B 15/24 (2006.01); F15B 15/26 (2006.01)

CPC (source: EP)

A62C 2/248 (2013.01); F15B 15/261 (2013.01)

Citation (search report)

DE 2634565 A1 19780202 - IVA INGENIEURGESELLSCHAFT MBH
DE 3008995 A1 19810917 - ESSMANN KG HEINZ [DE]
DE 2408200 A1 19750828 - GRESCHA GES GREFE & SCHARF [DE]
US 2582512 A 19520115 - STUELAND HAROLD M
DE 109684 C
FR 994333 A 19511115 - F BRASSEUR SA DES ATEL

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL SE

DOCDB simple family (publication)

EP 0335504 A1 19891004; EP 0335504 B1 19921119; DE 3814003 A1 19891012; DE 68903519 D1 19921224; DE 68903519 T2 19930519

DOCDB simple family (application)

EP 89301992 A 19890228; DE 3814003 A 19880426; DE 68903519 T 19890228