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:
Oct. 04, 1988
Filed:
May. 07, 1987
Applicant:
Inventor:
Mark E Peters, Cookeville, TN (US);
Assignee:
The Duriron Company, Inc., Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
13762532 ; 251127 ;
Abstract
A low-noise plug valve is formed with a plug in which one side wall of the plug is a grid defined by a plurality of small openings therethrough, which openings lead from the through passage of the plug to a region outside the plug and which grid is movable into partial flow-blocking relation with respect to the valve body outlet, in partially open positions of the plug. The grid creates a back pressure which suppresses the flashing and the formation of cavitation bubbles. The grid openings, in the partially open position of the plug, are in substantial alignment with the direction of flow.