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:
Feb. 16, 1988
Filed:
Jul. 31, 1986
Applicant:
Inventors:
Howard J Bates, Yorba Linda, CA (US);
Willard D Childs, Encinitas, CA (US);
Eugene S Matsuda, Laguna Hills, CA (US);
Douglas W Nayler, Mission Viejo, CA (US);
Assignee:
NL Industries, Inc., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137498 ; 137504 ; 1375147 ;
Abstract
A speed control valve is formed with a pair of cooperating inversely operating dashpots to control movement of a valve element in either direction so as to prevent sudden actuation upon change in fluid velocity or oscillation due to fluid flow changes. Bleeding of fluid into and out of the dashpots controls the speed of movement of the valve element.