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:
Jul. 22, 1980
Filed:
Feb. 01, 1979
Applicant:
Inventor:
Charles W Grennan, Newington, CT (US);
Assignee:
Chandler Evans Inc., West Hartford, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F04D / ; F01D / ; F03B / ;
U.S. Cl.
CPC ...
415 21 ; 415 26 ; 415131 ; 415140 ;
Abstract
A high pressure centrifugal pump has an impeller assembly including two mating impeller sections which are each constituted by a shroud with fixed geometry blades. The impeller sections are fixedly mounted upon a rotatable shaft and are of a construction which permits the pressure between the impeller sections to engender flexure of the sections away from each other so as to vary the breadth of the impeller assembly. A servo control device is adapted to control the pressure behind the shrouds such that the pump delivers a constant flow at varying back pressures.