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. 08, 1997
Filed:
May. 23, 1996
Applicant:
Inventors:
Kimball R Barron, Marshalltown, IA (US);
Edward J Merwald, Marshalltown, IA (US);
Assignee:
Fisher Controls International, Inc., Clayton, MO (US);
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251210 ; 251332 ;
Abstract
A fluid control valve operable in erosive fluid conditions includes a primary soft seat protected by a secondary hard seat. Two dead band areas control the fluid flow on valve opening and closing to spacially separate the soft seat from the flow stream. A diverter is provided to deflect the flow stream away from the soft seat.