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:
Jun. 08, 1993
Filed:
Apr. 22, 1992
Applicant:
Inventors:
Robert A Walker, Galston, GB;
Anthony W Porter, Kimberley, GB;
Assignees:
James Howden & Co. Ltd., , GB;
Greene, Tweed & Co., Ltd., , GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 74 ; 277-2 ; 277 27 ; 277 53 ; 277 92 ; 277 59 ; 277 / ;
Abstract
A sealing assembly between first and second relatively rotatable parts, such as the parts of a tunnel boring machine, in which a flange on a first part has a radial sealing face engaged by the axial faces of inner and outer sealing rings mounted on the body portion of the second part at radially spaced locations, a bleed passage in the second body portion opening between the sealing rings and indicating any failure in the outer sealing ring.