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. 15, 1994
Filed:
Jan. 11, 1993
Applicant:
Inventor:
Zvi Einav, Doar Gvat, IL;
Assignee:
Plastro-Gvat, Doar Gvat, IL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05B / ; F15D / ;
U.S. Cl.
CPC ...
2395331 ; 239542 ; 239570 ; 138 45 ;
Abstract
A drip irrigation emitter includes an elastomeric membrane formed on one side with a recess having a flat bottom to define a thin wall section of substantially smaller thickness than the remainder of the elastomeric membrane, and with a flow-restrictor orifice centrally through the thin wall section and of much smaller cross-sectional area than that of the recess to produce a pressure drop in the fluid flowing therethrough to the emitter outlet opening. The membrane is deformable to enlarge or restrict the flow to the outlet opening in response to changes in the inlet pressure to thereby regulate the flow through the outlet opening.