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:
Sep. 29, 1998
Filed:
Jan. 15, 1997
Applicant:
Inventor:
Thomas E Kurtz, Xenia, OH (US);
Assignee:
Vernay Laboratories, Inc., Yellow Springs, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01G / ;
U.S. Cl.
CPC ...
239-1 ; 239542 ;
Abstract
Fluid flow control devices such as drip irrigation or micro-sprinkler valves and emitter unit membranes are constructed of an elastomeric composition selected from the group consisting of (1) a halogenated butyl elastomer, and (2) a diene nitrile elastomer and mixtures of (1) and (2). An ethylene propylene diene elastomer EDPM can also be incorporated into the composition. Use of the compositions inhibits valve and membrane swelling that would otherwise occur when such valves and membranes are contacted by water sources comprising organic and inorganic impurities.