Powder actuated tool
US4114792A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 20, 1977 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Jul 20, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25C1/143
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A tool for driving nails into hard surfaces wherein the driving power is provided by cartridges of explosive powder. The cartridges are contained in strips with a single strip containing a multiple of cartridges, in the order of ten. The improvement comprises the mechanism for feeding the strip of cartridges in increments automatically through the tool and for retaining the tool piston in its ready to be fired position. The feeding of the cartridges is accomplished by a camming finger connected to the barrel of the tool which progressively engages successive following lugs on the strip to move successive cartridges of the strip into place within the firing chamber as the tool is repeatedly engaged and disengaged with a work surface. A ring having a double loop configuration frictionally grips the piston to resist accidental displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.