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. 09, 2004
Filed:
Oct. 19, 2001
Applicant:
Inventors:
Takashi Ohta, Ushiku, JP;
Hironori Minagawa, Ichikawa, JP;
Assignee:
NOK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 3/508 ; H05B 6/00 ;
U.S. Cl.
CPC ...
B29C 3/508 ; H05B 6/00 ;
Abstract
A radially inner surface of a sealing lip of an oil seal, is irradiated to induce a chemical reaction in the material of the sealing lip, to form hard helical portions. The hard helical portions act like a helical groove or rib to pump oil back to an oil-side for excellent sealing properties when there is a relative rotational movement between the sealing lip and a shaft to sealed, as well as a static sealing ability at the time there is no relative rotation movement.
Ohta, Takashi. (2004). Sealing device and process for manufacturing the same (U.S. Patent No. 6814919). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6814919
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile