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.

Date of Patent:
Oct. 02, 2012

Filed:

Dec. 21, 2009
Applicants:

Akihiro Hozumi, Takatsuki, JP;

Koji Omori, Kusatsu, JP;

Hiroyuki Miyaura, Ibaraki, JP;

Yoshiyuki Baba, Hikone, JP;

Junichi Nishikimi, Anjo, JP;

Akira Tomonaga, Anjo, JP;

Inventors:

Akihiro Hozumi, Takatsuki, JP;

Koji Omori, Kusatsu, JP;

Hiroyuki Miyaura, Ibaraki, JP;

Yoshiyuki Baba, Hikone, JP;

Junichi Nishikimi, Anjo, JP;

Akira Tomonaga, Anjo, JP;

Assignees:

OMRON Corporation, Kyoto, JP;

Makita Corporation, Aichi, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

In view of the above problem, the present invention is to provide an electrical power tool which enables a user to intuitively grasp a rotation direction and a rotation speed of a tip tool. The electrical power toolcomprises a chuckprovided at a tip of a tool body, and rotatable with a tip tool held, and an operation switchhaving operation protrusionsexposed to both side surfaces of a tool bodyso as to be able to operate, respectively bilaterally symmetrically protruded with a rotation axis of the chucktherebetween, coaxially rotatable with the chuck, and urged so as to be self-restored to a neutral position. The chuckis rotated in a direction according to a rotation direction of the switchat a speed according to a rotation angle from the neutral position of the operation switch


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