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:
Mar. 31, 1998
Filed:
Nov. 21, 1995
Atsushi Yao, Kashihara, JP;
Masahiro Mukasa, Nara, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
There is provided a dental handpiece capable of stably supporting a turbine during high-speed rotation thereof. A projection is provided at each corner portion of a polygonal end surface of a retainer. The projections prevent a conical spring washer from deviating from a centered position relative to the central axis of the turbine. First and second ball bearings for supporting the turbine are axially pressed with a sufficient force which is symmetrical about the central axis of the turbine. A sufficient axial pre-load can be applied to the first and second ball bearings by the conical spring washer, and the conical spring washer is prevented from being displaced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile