DK385289A - A ENDLOCK BLOCK PROVIDED PRESSURE AIR CYLINDER, ISSUED TO ACTIVATE PUMP DRAWING VALVES - Google Patents

A ENDLOCK BLOCK PROVIDED PRESSURE AIR CYLINDER, ISSUED TO ACTIVATE PUMP DRAWING VALVES Download PDF

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Publication number
DK385289A
DK385289A DK385289A DK385289A DK385289A DK 385289 A DK385289 A DK 385289A DK 385289 A DK385289 A DK 385289A DK 385289 A DK385289 A DK 385289A DK 385289 A DK385289 A DK 385289A
Authority
DK
Denmark
Prior art keywords
locking
cylinder
piston
air cylinder
rod
Prior art date
Application number
DK385289A
Other languages
Danish (da)
Other versions
DK385289D0 (en
DK172502B1 (en
Inventor
Otto Grasl
Original Assignee
Grasl Otto Fa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE8812882U external-priority patent/DE8812882U1/de
Application filed by Grasl Otto Fa filed Critical Grasl Otto Fa
Publication of DK385289D0 publication Critical patent/DK385289D0/en
Publication of DK385289A publication Critical patent/DK385289A/en
Application granted granted Critical
Publication of DK172502B1 publication Critical patent/DK172502B1/en

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  • Actuator (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

In a compressed air cylinder having end position locking, in particular for activating smoke ventilation valves in smoke and heat ventilation systems, a double-sided piston 9 is displaceable in a counter cylinder having two cylinder chambers 9a, 9b by means of a pressure medium. For reliable locking of the end positions there is provided a locking piston 3 and 4, respectively, on both sides beyond the closed cylinder chambers 9a, 9b and situated adjacent to one of these cylinder chambers, displaceably and concentric with the piston rod 10, said locking piston being in pressure medium conducting connection with the adjacent cylinder space 9a and 9b, respectively. Each of the locking pistons 3, 4 has a bush-shaped portion, e.g. 4a, in a locking position encompassing radially displaceably journalled balls 11. Hereby, the balls engage partly in an annular groove, e.g. 10a, which is connected to the piston rod 10. The bush- shaped portion releases the balls radially outwards when removed from these. In an embodiment of the compressed air cylinder, this locking device may be extended into a double- stroke cylinder by means of an extra locking rod by the piston rod, and a pressure activated toggle valve which activates an extra locking piston cooperating with the extra locking rod. <IMAGE>
DK385289A 1988-10-13 1989-08-07 A compressed air cylinder provided with end position locking, in particular for activating smoke ventilation valves DK172502B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8812882 1988-10-13
DE8812882U DE8812882U1 (en) 1988-10-13 1988-10-13
EP89112178A EP0363575B1 (en) 1988-10-13 1989-07-04 Pneumatic actuator with locking means in the end positions, especially for actuating smoke extractor flues
EP89112178 1989-07-04

Publications (3)

Publication Number Publication Date
DK385289D0 DK385289D0 (en) 1989-08-07
DK385289A true DK385289A (en) 1990-04-14
DK172502B1 DK172502B1 (en) 1998-10-26

Family

ID=25953643

Family Applications (1)

Application Number Title Priority Date Filing Date
DK385289A DK172502B1 (en) 1988-10-13 1989-08-07 A compressed air cylinder provided with end position locking, in particular for activating smoke ventilation valves

Country Status (2)

Country Link
DK (1) DK172502B1 (en)
HU (1) HU214169B (en)

Also Published As

Publication number Publication date
DK385289D0 (en) 1989-08-07
HU214169B (en) 1998-01-28
HUT52218A (en) 1990-06-28
DK172502B1 (en) 1998-10-26

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Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed

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