Combustion type power tool having fin in low turbulent...

Details Combustion type power tool having fin in low turbulent... Combustion type power tool having fin in low turbulent...

2006-06-20

2006-06-20

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C227S010000

Reexamination Certificate

active

07063052

ABSTRACT:
A combustion-chamber frame is disposed in a housing of a combustion-type power tool and is movable in a longitudinal direction in interlocking relation to a push lever. The combustion-chamber frame is abuttable on a head portion to provide a combustion chamber in cooperation with the head portion and a piston. A fan is disposed in the combustion chamber and is connected to an output shaft of a motor so as to be rotatable with the output shaft for promoting turbulent combustion of air-fuel mixture. The fan and the combustion-chamber frame define, within the combustion chamber, a high turbulent-combustion region in which the turbulent combustion is rapidly generated and a low turbulent-combustion region outside the high turbulent-combustion region. A fin is disposed at at least one of the combustion-chamber frame, the head portion, and the piston to protrude into the combustion chamber. The fin is located within the low turbulent-combustion region.

REFERENCES:
patent: 5197646 (1993-03-01), Nikolich

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