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:
Nov. 12, 2002
Filed:
Nov. 06, 2000
Motonori Usui, Nagano, JP;
Kabushiki Kaisha Sankyo Seiki Seisakusho, Nagano, JP;
Abstract
A manufacturing tool is inserted in a hole formed in a work piece for forming a fluid bearing groove on an inner peripheral surface of the hole. A tool shaft is rotated in the hole while being moved in an axial direction thereof. A plurality of balls are rotatably supported on an outer peripheral face of the tool shaft. The balls are to be abutted against the inner peripheral surface of the hole to form the fluid bearing groove thereon in accordance with the movement of the tool shaft. A retainer is detachably fitted on the outer peripheral face of the tool shaft so as to retain the balls on the tool shaft. A fixing member is detachably fitted with the tool shaft so as to fix the retainer on the tool shaft. The balls can be replaced when the fixing member and the retainer is detached from the tool shaft.