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US 5,701,676 AGranted
Portable rotary saw
AssigneeMakita Corporation
InventorAkihiro Itoh
Life of this patent
Estimating the term…
Abstract
A portable rotary saw includes a cooling fan fastened to the output shaft of a motor and a plurality of ports provided downstream of the fan in a blade case defining a blade chamber. The ports allow the cooling air delivered by the fan to blow further downstream in the housing of the portable rotary saw. The portable rotary saw further includes a cover plate provided in front of the ports for separating a pathway of a wind caused by a rotating saw blade and for directing the cooling air out of the blade chamber without disturbing the wind caused by the rotating saw blade.
Claims11
A rotary saw, comprising
- a cooling fan coupled to an output shaft of a motor,
- fluid communication means forming an air intake to permit cooling air to flow from said cooling fan to a blade chamber formed by a blade case such that said cooling air delivered by the cooling fan is blown into the blade chamber through the fluid communication means, and
- means forming a guide passage in the blade chamber for separating the cooling air passing through said fluid communication means from a pathway of airflow created by a rotating saw blade mounted within the blade chamber, said guide passage having means forming an opening for discharging the cooling air out of the blade chamber.
Dependencies are inferred from the claim text.