Combustion-type power tool having ignition proof arrangement

Details Combustion-type power tool having ignition proof arrangement Combustion-type power tool having ignition proof arrangement

2007-12-11

2007-12-11

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C123S1690PH

Reexamination Certificate

active

11356102

ABSTRACT:
In the combustion-type power tool, a first shelter wall and a second shelter wall are disposed to partially surround an area between an ignition plug and an ignition ground. Two gaps are provided between the first and second shelter walls. The first shelter wall extends radially outwardly from an outer peripheral surface of a motor boss, and also protrudes from an end face in an axial direction of a fan shaft. The first shelter wall has a lower end surface inclined such that an axial length between the end face and the lower end surface is gradually reduced toward radially outer end of the first shelter wall.

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