Emitter and drip irrigation tube

Patent metadata

Field	Value
Publication number	US-11044856-B2
Application number	US-201615755564-A
Country	US
Kind code	B2
Filing date	Jul 20, 2016
Priority date	Aug 27, 2015
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

An emitter ( 120 ) adjusts the flow rate of a liquid for irrigation to be discharged from a discharge opening ( 112 ) of a tube ( 110 ) so that, according to pressure of the liquid for irrigation within the tube ( 110 ) received by a second membrane ( 153 ), the flow rate is made smaller as the pressure becomes greater in a prescribed range of pressure. The emitter ( 120 ) is constituted by mating a first member ( 130 ) having a bottom surface with a shape that follows along the inside wall surface of the tube ( 110 ) and a second member ( 150 ) that includes the second membrane ( 153 ) and is mated to the first member ( 130 ).

First claim

The invention claimed is:

1. An emitter configured to be joined to an inner wall surface of a tube for carrying irrigation liquid at a position corresponding to a discharging port for communicating between inside and outside of the tube, the emitter being configured to quantitatively discharge the irrigation liquid in the tube from the discharging port to the outside of the tube, the emitter composed of:
two molded members, the two molded members being a first member and a second member, wherein:
the first member includes:
a pressure reduction channel part configured to form a pressure reduction channel configured to carry the irrigation liquid taken by a liquid intake part while reducing a pressure of the irrigation liquid, and
a discharging part configured to house the irrigation liquid supplied from a discharge rate adjusting part, the discharging part being configured to face the discharging port,
wherein the first member is configured to be joined to the inner wall surface of the tube, and the pressure reduction channel part is disposed on a bottom surface of the first member, the bottom surface being a surface to be joined to inner wall surface of the tube, and

the second member includes:
the liquid intake part configured for intake of the irrigation liquid in the tube, and
a film part configured to receive the pressure of the irrigation liquid in the tube,
wherein:
the discharge rate adjusting part is configured to control a flow rate of the irrigation liquid supplied from the pressure reduction channel by the film part that is deformed by the pressure of the irrigation liquid in the tube,
the second member is configured to be coupled to the first member,
when the second member is coupled to the first member, the second member advances to a position where a part of the second member is to be joined to the inner wall surface of the tube,
the film part is integrated with the second member,
an entirety of the second member including the film part is integrally molded with one material, and
the discharge rate adjusting part is formed when the second member is coupled with the first member.

2. The emitter according to claim 1 , wherein the second member is configured to be coupled onto a side part of the first member from an outside.

3. The emitter according to claim 1 , wherein the first member and/or the second member further include an undercut part configured to lock the second member to the first member in a direction opposite to a direction in which the second member advances when the second member is coupled to the first member.

4. A drip irrigation tube comprising:
a tube including a discharging port configured to discharge irrigation liquid; and
an emitter according to claim 1 that is joined on an inner wall surface of the tube at a position corresponding to the discharging port.

Assignees

• Enplas Corp

Inventors

• Kidachi Masahiro

Classifications

• A01G25/092

  movable around a pivot centre · CPC title

• A01G25/09

  Watering arrangements making use of movable installations on wheels or the like · CPC title

• A01G25/06

  Watering arrangements making use of perforated pipe-lines located in the soil · CPC title

• A01G25/023 Primary

  Dispensing fittings for drip irrigation, e.g. drippers · CPC title

• A01G25/02 Primary

  Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation · CPC title