US Patent 8627900 Electric power tool
Patent 8627900 was granted and assigned to Hitachi on January, 2014 by the United States Patent and Trademark Office.
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Patent abstract
An electric power tool (1) includes a brushless direct-current motor (3) and a drive circuit that supplies drive power to the motor, the power tool rotates or drives a tool, whereby the drive circuit includes plural switching elements (21), and is arranged on a board (9) provided in a grip portion of a housing or below the grip portion; and an electric fan (22) is provided in the vicinity of the switching element for cooling the switching element.
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Patent Inventor Names
Hiroki Uchida0
Junichi Toukairin0
Katsuhiro Oomori0
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US Patent 08627900 Electric power tool US Patent 8627900 Electric power tool
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Patent Number
086279000
Patent Number
86279000
Edits on 28 Sep, 2022
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Is a
Current Assignee
Patent Jurisdiction
Patent Number
086279000
Date of Patent
January 14, 2014
0Patent Application Number
129947310
Date Filed
May 20, 2009
0Patent Primary Examiner
Edits on 21 Dec, 2021
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US Patent 08627900 Electric power tool
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
08627900
Date of patent
January 14, 2014
Patent application number
12994731
Date Filed
May 20, 2009
Patent primary examiner
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