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:
Jun. 23, 1981
Filed:
Apr. 10, 1979
Applicant:
Inventor:
Roydon B Cooper, Locust Valley, NY (US);
Assignee:
Pall Corporation, Glen Cove, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ; F16K / ; B01D / ;
U.S. Cl.
CPC ...
1376361 ; 137601 ; 251 95 ; 251104 ; 251110 ; 251258 ; 251282 ; 210340 ;
Abstract
A pressure-balanced three-way transfer valve for controlling fluid flow into one of two fluid lines includes a pair of cam actuated valves actuated by a single actuator to move a respective valve to an open and closed position. Pressure balancing of the valve rods is accomplished by a fluid passage through each of the respective rods to allow lower pressure to a respective balancing chamber. The valves further include respective balancing surfaces.