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:
Sep. 02, 1980
Filed:
Jun. 21, 1976
Applicant:
Inventors:
John L Bearden, Schaumberg, IL (US);
Sankaraiyer Gopalakrishnan, Roselle, IL (US);
John J Tuzson, Evanston, IL (US);
Assignee:
Borg-Warner Corporation, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ; B23P / ;
U.S. Cl.
CPC ...
2915 / ; 2915 / ; 415D / ;
Abstract
The operating characteristics and the nominal, best operating point of a multi-stage centrifugal pump are shifted to lower flow rates without loss of nominal head and without substantial loss of efficiency by machining or otherwise shortening the trailing edge of all or some of the stationary guide vanes of the diffusers between impeller stages. By so doing, a single pump size can be adapted to a range of flow requirements, as desired. Thus, it is possible to reduce the number of pump sizes manufactured, and yet supply the needs of customers.