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:
May. 28, 2002
Filed:
Apr. 28, 2000
Applicant:
Inventor:
Shin-ichi Nakane, Okazaki, JP;
Assignee:
Makita Corporation, Anjo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 1/918 ;
U.S. Cl.
CPC ...
E21B 1/918 ;
Abstract
A rechargeable impact screwdriver ( ) includes a housing ( ) and a brush holder ( ). The brush holder ( ) in turn includes a circular main holder body ( ) and a bearing box ( ) which contains a ball bearing and is coaxially and integrally formed with the main holder body ( ). A pair of carbon brushes ( ) is inserted into the bearing box ( ) so as to come into pressing contact with a motor shaft ( ) which is supported by the ball bearing of the a bearing box ( ). The brush holder ( ) is elastically supported within the housing ( ) by four rubber pins ( ) which are mounted in the main holder body ( ) and in bosses ( ) of the housing ( ) on the opposite ends thereof.