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:
Apr. 20, 1976
Filed:
Jun. 21, 1974
Applicant:
Inventor:
Gail Cornelius, Portland, OR (US);
Assignee:
R. M. Wade & Co., Portland, OR (US);
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ;
U.S. Cl.
CPC ...
251118 ; 137540 ; 138 45 ;
Abstract
A flow control device includes a resilient member defining an opening through which fluid flows, the opening becoming smaller upon increase of pressure of fluid supplied thereto, and relatively larger upon decrease of pressure of fluid supplied thereto. A check valve allows flow of such fluid in an irrigating direction through the device upon a certain level of pressure of supplied water being achieved, but closes when such pressure falls below such certain level to block flow through the device.