Combustion chamber arrangement in combustion type power tool

Details Combustion chamber arrangement in combustion type power tool Combustion chamber arrangement in combustion type power tool

2006-06-27

2006-06-27

Sipos, John (Department: 3721)

Internal-combustion engines

Free piston

Single chamber; one piston

C123S0460SC, C227S008000, C227S009000, C227S010000, C227S011000

Reexamination Certificate

active

07066117

ABSTRACT:
A combustion type power tool capable of restraining reduction in output power due to lowering of combustion efficiency. A specific space within a combustion-chamber frame is enlarged. The specific space contains a specific region where high turbulence occurs in a combustion chamber at which a fuel is ignited. The enlargement is made by providing an enlarged distance between a rotation shaft of the fan and an inner wall of the combustion-chamber frame. When the turbulent combustion occurring at the specific region is expanded in the combustion chamber, flame propagation contour of the turbulent combustion reaches the wall of the combustion-chamber frame and ribs at a delayed timing. Therefore, after the turbulent combustion is sufficiently promoted, the flame reaches the combustion-chamber frame and the ribs. In other words, the flame does not reach the combustion-chamber frame and the ribs at the initial stage of turbulent combustion.

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