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:
Mar. 22, 1994
Filed:
Dec. 20, 1991
Ken-ichi Kajiwara, Tokyo, JP;
Ebara Corporation, Tokyo, JP;
Abstract
A liner ring for a pump is provided between a pump casing and an impeller to check counterflow therebetween. The liner ring comprises a housing provided on a casing body, an annular sealing member provided in the housing in such a manner that a predetermined gap is provided in a radial direction between the sealing member and an impeller, and an elastic member provided between the sealing member and the housing. In accordance with the present invention, the sealing member is housed in the housing made of sheet metal in such a manner that a predetermined gap is provided between the sliding member and the housing. The gap corresponds to the variation in dimensions due to the difference in thermal expansion coefficients of the sealing member and the housing. The gap is sealed by the elastic member provided between the sealing member and the housing.