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:
Aug. 25, 1992
Filed:
Mar. 20, 1990
Applicant:
Inventors:
Clayton Bear, Calgary, CA;
Timothy A Harris, Calgary, CA;
Assignee:
NOVA Corporation of Alberta, Calgary, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D / ;
U.S. Cl.
CPC ...
415 30 ; 415 47 ; 415105 ; 415107 ; 415112 ; 415 81 ; 277-3 ; 277 15 ; 277 / ; 277 74 ;
Abstract
The axial forces imposed on a rotor of a fluid machine such as a compressor is controlled by modulating the pressure supplied to a piston and cylinder device acting between the rotor shaft and housing. A parameter indicative of axial force on the rotor during operation is monitored and changes in the magnitude and direction of the axial forces countered by varying the pressure in the cylinder. The net axial forces imposed on the shaft may thus be controlled in a predetermined range.