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. 19, 2006
Filed:
Oct. 30, 2001
James R. Hardin, North Huntingdon, PA (US);
James R. Hardin, North Huntingdon, PA (US);
Elliott Turbomachinery Co., Inc., Jeannette, PA (US);
Abstract
A valve arrangement () for reducing the instability of fluid flow in a compressible flow governor valve includes a cutoff plug () with a lateral concave surface () and an end portion () having a substantially circular cross section, and a seat () with a convex surface (). The lateral concave surface () and the end portion () of the cutoff plug () define an abrupt cutoff corner (). The radius (re) of the end portion () of the cutoff plug () is less than the radius (Rs) of the seat (). The radius of curvature (R) of the seat () is less than the radius of curvature (rq) of the lateral concave surface () of the cutoff plug (). The configuration of the cutoff plug () and seat () enhances the annular flow pattern beneath the cutoff plug () at all lift positions thus reducing flow instability.