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 PDFInfo
- 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
Links
Landscapes
- 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>
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) |
-
1989
- 1989-08-07 DK DK385289A patent/DK172502B1/en not_active IP Right Cessation
- 1989-08-10 HU HU894103A patent/HU214169B/en not_active IP Right Cessation
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B1 | Patent granted (law 1993) | ||
PBP | Patent lapsed |
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