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:
Feb. 08, 1977
Filed:
May. 07, 1975
Applicant:
Inventors:
Assignee:
Seiko Seiki Kabushiki Kaisha, , JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01R / ;
U.S. Cl.
CPC ...
339 / ; 3391 / ;
Abstract
A spindle assembly has a rotatable spindle which is electrically insulated from its housing by means of a moulded synthetic resin layer surrounding bearing holders. Electric current for effecting electrolytic grinding is supplied by a brush member which is in contact to the rear end of the spindle, the contact portion of the spindle and the brush having air circulating pathes for cooling and ejecting out powdered-brush-material and have radiating surfaces exposed to cooling air flow.