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:
Apr. 01, 1980
Filed:
Sep. 21, 1978
Applicant:
Inventor:
Junji Otsuka, Okabe, JP;
Assignee:
Nippon Oil Seal Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 92 ;
Abstract
A mechanical shaft seal has a seal ring made of rubber or the like elastic material and disposed between a housing and a floating seat. The seal ring has a poly-arcuate shape consisting of continuous arcuate portions of different diameters. The maximum outer diameter of the seal ring is larger than the inner diameter of the peripheral surface of a stepped recess formed in the housing, while the minimum inner diameter of the seal ring is smaller than the outer diameter of the peripheral surface of a stepped recess formed on the floating seat.