Piston retention device for combustion-powered tools

Details Piston retention device for combustion-powered tools Piston retention device for combustion-powered tools

1996-05-03

1999-01-19

Smith, Scott A.

Elongated-member-driving apparatus

Explosive-type driving means

With plunger

227130, B25C 104

Patent

active

058605800

ABSTRACT:
An improved combustion powered tool for driving fasteners into a workpiece includes a main housing enclosing a cylinder body and an adjacent combustion chamber. The tool includes a workpiece-contacting nosepiece attached to the housing at the end opposite the combustion chamber and holds fasteners to be driven into the workpiece. A reciprocally disposed piston is mounted within the cylinder body, and is attached to an elongate driver blade, the driver blade being used to impact the fasteners and drive them into the workpiece. At the upper end of the cylinder body is disposed a compressible piston retaining device. The retaining device is of sufficient strength to accommodate the weight of the piston and to retard the upward velocity of a returning piston, but is overcome when the tool is fired.

REFERENCES:
patent: 3815475 (1974-06-01), Howard et al.
patent: 3888404 (1975-06-01), Ramspeck et al.
patent: 3969988 (1976-07-01), Werner Maurer
patent: 5181450 (1993-01-01), Umberto Monacelli
patent: 5441192 (1995-08-01), Sugita et al.
patent: 5687898 (1997-11-01), Toulouse

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