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:
Nov. 06, 1990
Filed:
Sep. 18, 1989
Applicant:
Inventor:
Oliver L Danko, Chesterland, OH (US);
Assignee:
Nupro Company, Willoughby, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ; F16K / ;
U.S. Cl.
CPC ...
251285 ; 251229 ; 251245 ; 251331 ;
Abstract
A diaphragm valve includes alternative actuator structures. The first actuator arrangement includes an adjustable nut received on a bonnet portion of the valve for adjusting the stroke of an actuating stem. According to a first alternative arrangement, a sleeve is interposed between a biasing spring and an actuating member to limit the closing force imposed on the diaphragm. A stop defined on the bonnet limits axial movement of the actuating stem so that the spring eventually imposes the entire closing force on the diaphragm. In yet another embodiment, actuating pressure is reduced through incorporationh of a dual pistion actuator arrangement.