Internal combustion powered device for setting fastening element

Details Internal combustion powered device for setting fastening element Internal combustion powered device for setting fastening element

1991-10-01

1993-01-26

Okonsky, David A.

Internal-combustion engines

Free piston

Single chamber; one piston

60632, B25C 108

Patent

active

051814951

ABSTRACT:
A portable, internal combustion powered work device, such as a device for setting or driving fastening elements into a receiving material, includes a combustion chamber (9) wherein an air-fuel mixture is ignited. A guide cylinder (8) and a piston (7) are axially displaceably guided within the combustion chamber. When the air-fuel mixture is ignited, the piston (7) is driven and, in turn, drives a fastening element into the receiving material. Following the ignition of the air-fuel mixture and the driving of the fastening element, the combustion chamber volume is reduced to approximately zero, whereby a purely mechanical clearing of the combustion chamber is effected without the necessity of an additional flushing air flow.

REFERENCES:
patent: 4109475 (1978-08-01), Schnell
patent: 4200213 (1980-04-01), Liesse
patent: 4365471 (1982-12-01), Adams
patent: 4377991 (1983-03-01), Liesse
patent: 4721240 (1988-01-01), Cotta
patent: 4739915 (1988-04-01), Cotta
patent: 4759318 (1988-07-01), Adams
patent: 4773581 (1988-09-01), Ohtsu et al.
patent: 4905634 (1990-03-01), Veldman

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