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:
Aug. 18, 1992
Filed:
Feb. 27, 1991
Applicant:
Inventors:
Kazuya Suzuki, Osaka, JP;
Hirokazu Takii, Nara, JP;
Assignee:
Koyo Seiko Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F16C / ; F04D / ;
U.S. Cl.
CPC ...
4174234 ; 384488 ; 384492 ; 3849071 ; 415 90 ; 41742313 ;
Abstract
A ball ball bearing for use in a vacuum is a sealed full-type ball bearing comprising an inner ring and an outer ring both made of stainless steel, balls made of a ceramic composed primarily of silicon nitride, and stainless steel shield plates. The bearing has enclosed therein a grease of low-volatility composition comprising a diester synthetic oil serving as a base oil, an organic condensation agent and an ethylene tetrafluoride resin additive.
Suzuki, Kazuya. (1992). Ball bearing for use in vacuum and turbo-molecular pump incorporating (U.S. Patent No. 5139396). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5139396
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile