Cartridge for a power driven tool
US5493975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1995 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Feb 21, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B8/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A cartridge for a powder actuated tool having a cartridge case, a powder propellant, a bushing, and a piston. The piston has a tapered outer diameter that is larger in a rear end of the piston and is compressed inward by the cartridge case. A port extends through the piston and has an entrance to the port at a rear end of the piston with a semi-spherical shape to slow gas flow rate passing through the port and reduce the amount of propellant residue passing through the port. The piston has a main section and a cantilevered section. The cantilevered section has a general ring shape and forms a portion of the outer diameter of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.