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:
Jul. 27, 1993
Filed:
Oct. 31, 1991
Richard B Minch, Woodinville, WA (US);
Xemet, Incorporated, Redmond, WA (US);
Abstract
The present invention relates generally to fluid flow control valves and more particularly to orifice assemblies of the type which are continuously adjustable wherein a high pressure reduction is divided into multiple smaller pressure drops to reduce total audible noise generation, flow is divided into multiple paths of small dimensions to reduce total audible noise level, suppress the low frequency audible noise levels, disperse the audible noise over a wider spectrum to avoid intense peaks, cavitation and erosion damage to the valve are reduced without the need for expensive special materials, pressure reduction is achieved by adaptive reduction in area as well as friction resulting efficient use of energy, the actuator energy and force requirements are low due to force balancing design, yet the valve is energy efficient and fast.