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. 23, 1991
Filed:
Apr. 25, 1990
Applicant:
Inventor:
Anthony C Back, Slough, GB;
Assignee:
John Crane U.K. Limited, , GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277 88 ; 277 90 ; 277 / ; 277 / ; 277 27 ;
Abstract
A seal for providing a fluid tight seal between a pair of relatively rotatable components has a first seal face member mounted in fixed axial and rotational relationship and sealed with respect to one component and a second seal face member sealed with respect to said other component, the second seal face member being sealed with respect to its associated component by a radially extending diaphragm, the diaphragm being disposed on the high pressure side of the seal face members, so that when subjected to fluid under pressure the force acting on the diaphragm will urge the second seal face member into engagement with the first seal face member.