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US 5,294,058 AGranted
Regulated drip irrigation emitter
AssigneePlastro Gvat
InventorZvi Einav
Life of this patent
Estimating the term…
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.
Claims19
A drip irrigation emitter, comprising:
- a housing formed with an inlet opening and an outlet opening;
- and an elastomeric membrane located in said housing and defining an inlet chamber communicating with said inlet opening, and an outlet chamber communicating with said outlet opening;
- said elastomeric membrane being formed on one side with a recess partially through the membrane to define a thin wall section of substantially smaller thickness than the remainder of the elastomeric membrane;
- said elastomeric membrane being further formed with a flow-restrictor orifice through said thin wall section and of much smaller cross-sectional area than that of said recess to produce a pressure drop in the fluid flowing therethrough and through the outlet chamber to said outlet opening, said membrane being deformable such that a portion thereof, laterally of said recess and orifice and aligned with said outlet opening, is displaceable towards and away from said outlet opening to restrict or enlarge the flow thereto in response to changes in the inlet pressure and thereby to regulate the flow through said outlet opening.
1 more element
A drip irrigation emitter, comprising:
- a housing formed with an inlet opening and an outlet opening;
- and an elastomeric membrane located in said housing and defining an inlet chamber communicating with said inlet opening, and an outlet chamber communicating with said outlet opening;
- said elastomeric membrane being formed on one side with a recess partially through the membrane eccentrically thereof to define a thin wall section of substantially smaller thickness than the remainder of the elastomeric membrane;
- said elastomeric membrane being further formed with a flow-restrictor orifice through said thin wall section centrally of said recess and of much smaller cross-sectional area than that of said recess to produce a pressure drop in the fluid flowing therethrough and through the outlet chamber to said outlet opening, said membrane being deformable such that a portion thereof, laterally of said recess and orifice and aligned with said outlet opening, is displaceable towards and away from said outlet opening to restrict or enlarge the flow thereto in response to changes in the inlet pressure and thereby to regulate the flow through said outlet opening.
1 more element
A drip irrigation emitter, comprising:
- a housing formed with an inlet opening and an outlet opening;
- and an elastomeric membrane located in said housing and defining an inlet chamber communicating with said inlet opening, and an outlet chamber communicating with said outlet opening;
- said elastomeric membrane being formed on one side with a recess partially through the membrane to define a thin wall section of substantially smaller thickness than the remainder of the elastomeric membrane;
- said elastomeric membrane being further formed with a flow-restrictor orifice through said thin wall section, in the side of said elastomeric membrane facing said outlet opening, and of much smaller cross-sectional area than that of said recess to produce a pressure drop in the fluid flowing therethrough and through the outlet chamber to said outlet opening, said membrane being deformable such that a portion thereof, laterally of said recess and orifice and aligned with said outlet opening, is displaceable towards and away from said outlet opening to restrict or enlarge the flow thereto in response to changes in the inlet pressure and thereby to regulate the flow through said outlet opening.
1 more element
Dependencies are inferred from the claim text.