Combustion type power tool having fin for effectively...

Details Combustion type power tool having fin for effectively... Combustion type power tool having fin for effectively...

2006-06-08

2009-02-17

Kamen, Noah (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C227S010000

Reexamination Certificate

active

07490582

ABSTRACT:
A combustion-type power tool includes a housing having one end, a head portion disposed at the one end, and a cylinder disposed in the housing, the cylinder being formed with an exhaust hole. A piston is reciprocally movable in the cylinder, and a combustion-chamber frame is disposed in the housing and movable in an axial direction of the cylinder, the combustion-chamber frame being abuttable on the head portion to provide a combustion chamber in cooperation with the head portion and the piston. A fin is disposed on the cylinder and has a portion extending in a direction slanted in relation to the axial direction and oriented toward the exhaust hole.

REFERENCES:
patent: 2480879 (1949-09-01), Rice, Jr.
patent: 4403722 (1983-09-01), Nikolich
patent: 5197646 (1993-03-01), Nikolich
patent: 5558264 (1996-09-01), Weinstein
patent: 1 236 544 (2002-09-01), None
patent: 1 559 514 (2005-08-01), None

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