Combustion type power tool facilitating cleaning to internal...

Details Combustion type power tool facilitating cleaning to internal... Combustion type power tool facilitating cleaning to internal...

2006-05-16

2006-05-16

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C227S008000

Reexamination Certificate

active

07044090

ABSTRACT:
A combustion type power tool capable of performing cleaning to a cleaning target from outside of the tool without disassembly of a head cover and a head cap. In the head cap, first and second cleaning passages are formed. The first cleaning passage has one end open to an atmosphere and a closed inner end. The second cleaning passage has one end in communication with the first cleaning passage and another end open to a spark generating portion which is one of the cleaning target in the combustion type power tool. A check valve is disposed in the first cleaning passage for normally closing the one end of the first cleaning passage by a biasing force of a compression coil spring.

REFERENCES:
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patent: 4483280 (1984-11-01), Nikolich
patent: 4483473 (1984-11-01), Wagdy
patent: 4483474 (1984-11-01), Nikolich
patent: 4522162 (1985-06-01), Nikolich
patent: RE32452 (1987-07-01), Nikolich
patent: 5909836 (1999-06-01), Shkolnikov et al.
patent: 0 775 553 (1997-05-01), None
patent: 0 913 234 (1999-05-01), None

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