Explosive powder charge operated fastening element setting tool
US5653370A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1996 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Jan 5, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C1/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An explosive powder charge operated fastening element setting tool has a hydropneumatic damping unit (17) and includes a housing part (1) forming a piston guide (5, 6) for driving fastening elements and a handle part (15) displaceable against the force of the damping unit (17) in the setting direction relative to the housing part (1). The handle part (15) supports a cylinder (18) containing a liquid medium (21) under gas pressure. The housing part (1) cooperates with a piston (23) displaceable in the cylinder (18) against the flow resistance of the liquid medium (21). The damping unit (17) has no moving valve parts. At least one through aperture (24) is provided for the liquid medium (21) flow between a front and a rear cylinder space when the piston (23) is displaced. The aperture (24) has a least cross-section (M) so that the liquid medium flowing into the front cylinder space as a fastening element is driven has an effective flow cross-section corresponding to the least cross-section of the aperture (21), while after the fastening element has been driven the effective flow cross-section of the aperture from the front cylinder space into the rear cylinder space is smaller than th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.