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. 16, 2016
Filed:
Feb. 21, 2014
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Kevin M. Rankin, Windsor, CT (US);
Peter M. Ballard, Einfield, CT (US);
Todd Haugsjaahabink, Springfield, MA (US);
Glen A. Pruden, Somers, CT (US);
HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US);
Abstract
A rotary metering valve assembly includes a stationary body plate having a first contact surface. Also included is a valve plate having a second contact surface disposed in contact with the first contact surface of the stationary body plate, wherein the valve plate is configured to rotate relative to the stationary body plate. At least one of the first contact surface and the second contact surface comprises a surface flatness of less than about 2.4 μm (about 93 μin) and a surface roughness of at least about 0.2 μm (about 8 μin).