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. 07, 1989
Filed:
Dec. 31, 1987
Shun Chen, Winter Springs, FL (US);
Chin-Sheng Lee, Winter Springs, FL (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A bell seal assembly for the nozzle chamber unit of an elastic fluid turbine, such as the steam turbine used to drive electrical utility generators. The bell seal assembly includes a bell seal unit and a retaining nut unit; the seal skirt depends from a mounting flange. The outer skirt surface is subdivided into an upper skirt surface, an intermediate portion and a lower skirt margin. The intermediate portion is the primary skirt seal region, and the lower skirt margin is tapered inwardly toward the skirt end surface. The lower skirt margin includes a plurality of spaced apart, circumferentially extending grooves one of which terminates adjacent the lower edge of a sealing land on the primary seal portion of the skirt.