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. 15, 1979
Filed:
Jan. 23, 1978
Kenzo Kataoka, Uji, JP;
Takahiko Nose, Uji, JP;
Kabushiki Kaisha Morita Seisakusho, Kyoto, JP;
Abstract
A bearing for an air driven turbine operated dental handpiece of the type including a turbine rotor provided in a casing and having blade elements coupled to a shaft member. The bearing includes a first air bearing formed circumferentially about the shaft member, a second air bearing including a small gap formed between the end of the shaft and an inside surface of the casing and a means for introducing compressed air into the small gap and a pair of opposed magnets of the same polarity provided respectively in the end of the shaft member and the inside surface of the casing whereby the axial load on the turbine rotor is resisted not only by the second air bearing but also by the magnetic repulsive force of the magnets.