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:
Feb. 10, 2004
Filed:
Apr. 10, 2002
John M. Trantham, Hurst, TX (US);
George T. Watson, III, Dallas, TX (US);
Flow Design, Inc., Dallas, TX (US);
Abstract
According to one aspect of the invention, a fluid regulating control valve includes a housing having an upstream region and a downstream region and having a control orifice formed therein adjacent the downstream region and a piston slidably disposed within the housing. The piston has a fluid passage defining an intermediate region disposed between the upstream region and the downstream region and an edge adjacent the downstream region. The valve also includes an elastic member disposed within the housing for opposing translation of the piston within the housing and a throttling element adjacent the upstream region. The throttling element has a throttling surface adjacent the edge of the piston, in which the throttling surface and the edge define a throttling orifice therebetween. The valve further includes an equalization aperture formed in the housing to allow a fluid in the downstream region to enter an equalization chamber defined by a region between an inside surface of the housing and an outside surface of the piston.