Driving piston braking means for explosive powder actuated setting device
US4941391A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Jun 12, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C1/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In an explosive powder actuated setting device, a driving piston (8) is displaceable between a ready-to-fire position and a fired position within a barrel (12) formed by a piston guide (5). When the piston is driven from the ready-to-fire position into the fired position, it is held by braking balls (17) supported in recesses (16) in the piston guide. As it moves into the fired position, the piston moves the braking balls into the range of a spring (18) which biases the balls inwardly against the shank (11) of the piston (8). When the piston is returned into the ready-to-fire position, the balls move out of the range of the spring releasing the biasing force acting on the piston shank via the balls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.