Combustion type power tool having buffer piece

Details Combustion type power tool having buffer piece Combustion type power tool having buffer piece

2007-06-05

2007-06-05

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Free piston

Single chamber; one piston

C123S0460SC, C227S010000, C227S130000

Reexamination Certificate

active

11175176

ABSTRACT:
A combustion type power tool having an arrangement avoiding direct striking of a drive shaft against a cylinder head when combustion pressure is exerted. A motor is disposed at the cylinder head and includes a motor body and a drive shaft extending in an axial direction and protruding into a combustion chamber. A fan is connected to the drive shaft to be rotatable within the combustion chamber. A buffer piece made from an elastic material is supported to the cylinder head. The buffer piece is movable relative to the cylinder head in a direction substantially perpendicular to the axial direction. The buffer piece is formed with a through-hole through which the drive shaft extends.

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