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:
Jun. 25, 1996
Filed:
Jan. 20, 1995
Farhad Golestan, Dallas, TX (US);
John M Trantham, Dallas, TX (US);
Flow Design, Inc., Dallas, TX (US);
Abstract
A flow control valve (10) is provided including a valve body (20) and a piston (16). The valve body (20) has extending therethrough a longitudinal bore (18) defining a fluid passage (32). The piston (16) is slidably disposed within the bore (18) to vary the flow area of a fluid flow through the control valve (10). The piston (16) has a generally cylindrical body formed from a solid piece of material. The piston (16) contains a longitudinal flow channel (24). The longitudinal flow channel (24) has a varying depth. The piston (16) preferably slides within the longitudinal bore (18) to vary the flow area of the fluid passage (32) such that the fluid flow through the control valve (10) is substantially constant over a selected range of pressure differentials across the control valve (10).