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...

2006-06-08

2008-11-25

Kamen, Noah (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C227S010000

Reexamination Certificate

active

07455036

ABSTRACT:
A combustion-type power tool includes a housing, a head portion, a cylinder disposed in the housing, and a push lever. A piston is reciprocally movable in the cylinder, and a combustion-chamber frame is disposed in the housing and abuttable on the head portion to provide a combustion chamber in cooperation with the head portion and the piston. A fuel supplying portion supplies the fuel into the combustion chamber, a motor is disposed at the head portion, and a fan is disposed in the combustion chamber and connected to an output shaft of the motor so as to promote turbulent combustion of an air-fuel mixture. The fan and the combustion-chamber frame define a high turbulent-combustion region and a low turbulent-combustion region, a fin of one shape is located within the low turbulent-combustion region, and another fin of another shape has a part thereof located in the high turbulent-combustion region.

REFERENCES:
patent: 4522162 (1985-06-01), Nikolich
patent: 5197646 (1993-03-01), Nikolich
patent: 1 388 394 (2004-02-01), None
patent: 1 543 926 (2005-06-01), None

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