The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2007
Filed:
Jan. 07, 2005
Fumitoshi Numata, Anjo, JP;
Ryo Sunazuka, Anjo, JP;
Fumitoshi Numata, Anjo, JP;
Ryo Sunazuka, Anjo, JP;
Makita Corporation, Anjo-shi, JP;
Abstract
It is accordingly an object of the invention to provide a technique of cooling a power tool which further improves cooling effectiveness of the power tool. According to the invention, a power tool is provided that includes a driving motor, a tool bit, a power transmitting mechanism, a tool body and a cooling fan. The power tool further includes first and second cooling air passages. The first cooling air passage is disposed within the tool body and flows cooling air into the tool body by using the cooling fan. The second cooling air passage is provided within the tool body and takes outside air into the tool body by using the flow of the cooling air through the first cooling air passage. The cooling air within the first cooling air passage can be cooled by mixing outside air taken into the tool body via the second cooling air passage and therefore, the cooling air can further effectively cool components within the power tool. As a result, cooling effectiveness of the power tool can be improved.