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:
Mar. 02, 1993
Filed:
Dec. 09, 1991
Applicant:
Inventor:
Derek Woollatt, Campbell, NY (US);
Assignee:
Dresser-Rand Company, Corning, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F01L / ;
U.S. Cl.
CPC ...
251 48 ; 251 634 ; 123 9012 ;
Abstract
A shank of the valve reciprocates within a hydraulic fluid-receiving chamber, and a cap, detachedly confined with the chamber cooperates with the shank to define a dashpot. The dashpot serves to decelerate the final closing of the valve to minimize wear of the valve head and the seat against which it closes.