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:
Aug. 08, 1989
Filed:
Oct. 14, 1987
Dennis E Schnipke, Wooster, OH (US);
Premier Industrial Corporation, Cleveland, OH (US);
Abstract
Apparatus for minimizing water hammer and/or shock waves resulting from closure of a valve member disposed for movement into and out of closing arrangement in valve means included within a fluid flow system. The apparatus comprises a piston and cylinder arrangement having a circular path of travel, the cylinder being formed in part as an incised channel means in a body means, within which body means a rotatable sleeve means is disposed in a longitudinal bore. The inner portion of the cylinder is the outer surface of the rotatable sleeve, and a fluid chamber is formed by said combination. The piston means projects outwardly from the sleeve and is disposed within the channel means, so that the piston means sweeps the cylinder volume as the sleeve is rotated. An adjustable orifice is provided in the cylinder means to constrict the flow of fluid in said cylinder on rotation of the sleeve. A fluid is supplied to the piston and cylinder arrangement, and the valve member is connected with said sleeve such that displacement of the valve results rotational movement of the sleeve, which is resisted by the fluid and orifice means.