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:
Feb. 13, 2001
Filed:
May. 21, 1999
Applicant:
Inventors:
Masato Wada, Osaka, JP;
Junji Omiya, Osaka, JP;
Assignee:
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L 3/904 ;
U.S. Cl.
CPC ...
F16L 3/904 ;
Abstract
A space between a housing and a rotator is hermetically sealed with a double-mechanical seal. A pair of rotary seal rings are sandwiched between a pair of stationary seal rings while sandwiching therebetween a stopper ring for inhibition of relative rotation between the rotary seal rings and the rotator. A spring is interposed in a space between the stopper and each of the rotary seal rings for pressing each rotary seal ring against the corresponding stationary seal ring.