Combustion gas powered fastener driving tool

Details Combustion gas powered fastener driving tool Combustion gas powered fastener driving tool

1990-10-26

1992-02-25

Yost, Frank T.

Elongated-member-driving apparatus

Explosive-type driving means

With plunger

227 8, 123 46SC, B25C 108

Patent

active

050906062

ABSTRACT:
A combustion gas powered fastener driving tool includes inlet and outlet openings through which the combustion gases are discharged from a combustion chamber. These openings are located above the uppermost driving position (top dead center) of a slidable piston, so that an air and fuel mixture is fully trapped in the combustion chamber until after it is combusted. Since an outflow of the unburnt air and fuel mixture is completely prevented, the rate of fuel consumption of the fastener driving tool is high and there is no danger of accidental explosion of unburned fuel even when the fastener driving tool is used in a badly ventilated working place or site. An electric fan for forcing fresh air into the combustion chamber is disposed outside the cylinder and isolated from high temperatures. The fan is durable in structure and reliable in operation.

REFERENCES:
patent: 4403722 (1983-09-01), Nikolich
patent: 4483473 (1984-11-01), Wagdy
patent: 4483474 (1984-11-01), Nikolich
patent: 4522162 (1985-06-01), Nikolich
patent: 4712379 (1987-12-01), Adams et al.
patent: 4773581 (1988-09-01), Ohtsu et al.

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