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:
Apr. 01, 1997
Filed:
Oct. 23, 1995
Kimball R Barron, Marshalltown, IA (US);
Fisher Controls International, Inc., Clayton, MO (US);
Abstract
A fluid control valve suitable for pressure reducing service. A valve is provided with a fixed cage member containing an internal passageway communicating with a cage inlet and outlet. A movable valve plug is slidably mounted within the cage member and contains an internal plug passageway. A fluid flow path is provided through the plug assembly and through the cage internal passageway so that multi-stages of pressure reduction are obtained. The provided fluid flow includes a combination of axial, outwardly radial, inwardly radial flows and a flow through the internal passageway of the plug assembly in order to obtain the required multiple pressure drops. The restricted flow passages at each stage are large enough in size so that any particulate in the fluid will pass out without plugging up the passages in the valve trim.