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. 21, 2006
Filed:
Jun. 17, 2003
Applicants:
Paul Phelan, Manchester, GB;
Nicholas Derek Quarmby, Manchester, GB;
Inventors:
Paul Phelan, Manchester, GB;
Nicholas Derek Quarmby, Manchester, GB;
Assignee:
John Crane UK LImited, Slough, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 49/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A composite seal face ring has an inner ring () made of material with good tribological properties, the inner ring () being pre-compressed by an outer ring () with a high tensile strength and a thermal coefficient of expansion substantially equal to that of the inner ring (). The seal face ring is assembled by compressing the inner ring () and/or expanding the outer ring () by fluid under pressure, before inserting the inner ring () into the outer ring ().