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:
May. 22, 1990
Filed:
Oct. 28, 1988
Applicant:
Inventors:
Christopher D Eick, Phoenix, AZ (US);
Kenneth P Worcester, Tempe, AZ (US);
John R Williamson, Paradise Valley, AZ (US);
Assignee:
Allied-Signal Inc., Phoenix, AZ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02C / ;
U.S. Cl.
CPC ...
60 39281 ; 60734 ; 251 3001 ;
Abstract
A high speed liquid vortex pump is fitted with an electrically controlled needle valve assembly which modulates the pressure of a small portion of the working fluid which in turn moves a spool valve to regulate the high volume, high pressure pump output flow.