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:
Mar. 21, 2000
Filed:
Sep. 21, 1998
George S Stoner, Portsmouth, NH (US);
Peter M Schoonmaker, Attleboro, MA (US);
Northern Research and Engineering Corp, Woburn, MA (US);
Abstract
An inlet guide vane assembly for a centrifugal compressor includes a guide vane housing having an inlet side for receiving a fluid passing through the compressor at a first flow angle, an outlet side remote from the inlet side and a central axis extending between the inlet and outlet sides of the housing. The assembly has a first set of inlet guide vanes pivotally mounted within the guide vane housing, between the inlet side and the outlet side thereof, for impinging upon the fluid passing through the housing. The assembly includes a second set of inlet guide vanes pivotally mounted within the guide vane housing, between the first set of inlet guide vanes and the outlet side of the housing, for impinging upon the fluid passing through the housing after the fluid has passed through the first set of inlet guide vanes. The assembly also includes an actuator coupled with the first and second sets of inlet guide vanes for selectively pivoting the guide vanes so as to optimize the efficiency of the centrifugal compressor. Movement of said actuator pivots the first set of guide vanes a first angular distance from the central axis while pivoting the second set of guide vanes a second angular distance from the central axis, the second angular distance being greater than the first angular distance.