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. 05, 2002
Filed:
Oct. 18, 1999
NSK Ltd., Tokyo, JP;
Abstract
A shaft seal device is provided which is capable of sealing a rotary shaft in a positive and reliable manner without requiring a periodical lubricant-supplying operation, and is free from contamination of its environment, products, etc. by splashing of excess lubricant leaking from the oil seal lip. An annular sealing channel is formed in at least one of the opposite ends of a housing of a bearing unit, in which is accommodated an annular lubricant-bearing polymer member fitted on the rotary shaft. The polymer member has an inside diameter substantially equal to an outer diameter of the rotary shaft at an initial stage of rotation of the rotary shaft. The polymer member has at least part of opposite end surfaces or outer peripheral portion thereof disposed substantially in contact with opposite lateral wall surfaces of the sealing channel.