EP 0363575 B1 19940907 - Pneumatic actuator with locking means in the end positions, especially for actuating smoke extractor flues.
Title (en)
Pneumatic actuator with locking means in the end positions, especially for actuating smoke extractor flues.
Title (de)
Druckluftzylinder mit Endlageverriegelung, insbesondere zur Betätigung von Rauchabzugsklappen.
Title (fr)
Vérin pneumatique avec dispositif de verrouillage dans les positions extrêmes, en particulier pour la commande de clapet de fumée.
Publication
Application
Priority
DE 8812882 U 19881013
Abstract (en)
[origin: EP0363575A1] In a pneumatic actuator with locking means in end positions, especially for actuating smoke extractor flues in smoke and heat extracting installations, a double-ended piston (9) can be displaced by a pressure medium in a mating cylinder with two cylinder chambers (9a, 9b). For the purpose of reliable locking of the end positions, on both sides outside the closed cylinder chambers (9a, 9b) and in each case adjacent to one of said cylinder chambers a locking piston (3 or 4) can in each case be displaced concentrically with the piston rod (10), which locking piston is connected to the adjacent cylinder chamber (9a or 9b) in a manner conducting pressure medium. Each locking piston (3 or 4) has a sleeve-like section (e.g. 4a) which in one locking position embraces radially guided balls (ii). In this arrangement, the balls partially engage in an annular groove (e.g. 10a) connected to the piston rod (10). The sleeve-like section releases the balls radially outwards when it is moved away axially from them. In one embodiment of the pneumatic actuator, this locking device can be supplemented as a double-stroke cylinder by means of an additional locking rod on the piston rod and a pressure-controlled reversing valve, which actuates an additional locking piston co-operating with the additional locking rod. <IMAGE>
IPC 1-7
IPC 8 full level
F15B 15/26 (2006.01)
CPC (source: EP)
F15B 15/261 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0363575 A1 19900418; EP 0363575 B1 19940907; AT E111190 T1 19940915; DE 58908312 D1 19941013; DE 8812882 U1 19890216; ES 2060701 T3 19941201; YU 152389 A 19920907; YU 48225 B 19970822
DOCDB simple family (application)
EP 89112178 A 19890704; AT 89112178 T 19890704; DE 58908312 T 19890704; DE 8812882 U 19881013; ES 89112178 T 19890704; YU 152389 A 19890731