Combustion type power tool

Details Combustion type power tool Combustion type power tool

2005-10-04

2005-10-04

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C227S010000

Reexamination Certificate

active

06951194

ABSTRACT:
A combustion-type power tool capable of preventing a sub-stream of air-fuel mixture from passing through a gap between an electrode and an opposing electrode section, and yet capable of providing a desirable ignition without lowering maintenance efficiency of the tool. The opposing electrode section opposes the electrode of an ignition plug body. A head cap supports the opposing electrode section at a position closer to an axis of a fan than the electrode to the axis. The opposing electrode section protrudes from the head cap outward in the radial direction of the fan. The side of the head cap defining a combustion chamber has three parts. A first part surrounds the rotation axis of the fan. A second part supports the ignition plug body. A third part located in the radially outer side of the second section with respect to the axis.

REFERENCES:
patent: 4256071 (1981-03-01), Casull
patent: 5197646 (1993-03-01), Nikolich
patent: 6584945 (2003-07-01), Porth
patent: 2001/0006046 (2001-07-01), Thieleke et al.
patent: 1 053 834 (2000-11-01), None
patent: 3-25307 (1991-04-01), None

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