[특허]Method of making constant flow irrigation tape

Method of making constant flow irrigation tape 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B05B-015/00 B29C-053/02
출원번호	US-0766624 (1996-12-13)
발명자 / 주소	Delmer William Delmer Daniel Delmer Robert Erickson John W. Emmons Ray Charles
출원인 / 주소	Drip Tape Manufacturers & Engineers, Inc.
대리인 / 주소	Pretty, Schroeder & Poplawski
인용정보	피인용 횟수 : 35 인용 특허 : 0

초록 ▼

A constant-flow drip irrigation tape hose includes a primary flow path communicating water along the length of the hose. A secondary drip-flow path leads from the primary flow path to an emitter site outwardly of the hose. The hose is formed with a pair of variably spaced apart walls at least one of which is formed with a continuously-open channel defining part of the secondary flow path. A second variable-area part of the secondary flow path is defined by radial spacing of the pair of walls from one another. At least one of the pair of walls is responsive to internal water pressure in the primary flow path to open and close the variable-area part of the secondary flow path in response, respectively, to decreasing and increasing water pressure in the hose. A plurality of emitter sites are spaced regularly along a length of the hose. Consequently, the hose has at least one pressure range within which it provides a nearly constant drip-flow irrigation rate to plants of a row crop as the water pressure within the hose decreases over the length of an elongate run of hose.

대표청구항 ▼

[ We Claim:] [1.] A method of making a constant-flow drip irrigation hose of the type having an elongate primary water flow path extending therethrough, and a secondary flow path extending from said primary flow path to open outwardly of said hose, said method comprising the steps of:providing an elongate flexible resilient strip having opposite longitudinal marginal edges from which to form an elongate hose body with a boundary wall for said irrigation hose;wrapping said strip on itself with a first longitudinal marginal edge portion and an opposite second longitudinal marginal edge portion of said strip overlapping each other;sealingly securing said elongate wrapped strip to itself at circumferentially spaced locations adjacent to said longitudinal marginal edges to form said strip into an elongate hose body having a boundary wall;using said hose body to define an elongate primary water flow path which is bounded by said boundary wall and which extends through said irrigation hose;employing the overlapping of said marginal edge portions of said strip to define a secondary water flow path disposed radially between said overlapped first and second marginal edge portions and circumferentially between said first and second marginal edges;providing an inlet port communicating water from said primary flow path to said secondary flow path, and providing an outlet port spaced along the length of said hose from said inlet port for communicating water from said secondary flow path outwardly of said hose;forming one of said marginal edge portions to define a longitudinally-extending tortuous constantly-open flow channel opening toward the other of said marginal edge portions and defining a first part of said secondary flow path extending between said inlet port and said outlet port;providing one of said first marginal edge portion and said second marginal edge portion with a longitudinally-extending groove of dimension wider than said tortuous channel and narrower than the circumferential extent of said secondary flow path;spacing said marginal edge portions radially apart to provide a variable-area part of said secondary flow path extending longitudinally between said inlet port and said outlet port;using said longitudinally extending groove to define a third variable-area part of said secondary flow path;exposing an inner one of said marginal edge portions to water pressure within said primary flow path;flexing said inner one of said marginal edge portions to respectively increase and decrease the area of said variable-area second part of said secondary flow path in response to respective decreasing or increasing water pressures within said hoses; andusing said inner marginal edge portion to further deflect toward the outer one of said marginal edge portions in response to water pressure within said hose to constrict said variable-area third part of said secondary flow path after said variable-area second part of said secondary flow path has been substantially closed.

이 특허를 인용한 특허 (35)

Yiflach, Erez, Apparatus and method for producing an irrigation pipe.
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Mata, John D.; Taylor, Jr., William C., Continuous molded emitter.
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Mata, John D.; Taylor, Jr., William C.; Vildibill, Jeffrey A., Continuous molded emitter.
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Ensworth, Mark M.; Kim, Jae Yung; Edris, Mark Richard; Nazari, Joseph, Elastomeric emitter and methods relating to same.
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Ensworth, Mark M.; Kim, Jae Yung; Edris, Mark Richard; Nazari, Joseph, Elastomeric emitter and methods relating to same.
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Ensworth, Mark M.; Kim, Jae Yung; Edris, Mark Richard; Nazari, Joseph, Elastomeric emitter and methods relating to same.
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Ensworth, Mark M.; Kim, Jae Yung; Edris, Mark Richard; Nazari, Joseph, Emitter inlet.
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Ensworth, Mark M.; Kim, Jae Yung; Edris, Mark Richard; Nazari, Joseph, Emitter part.
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Daigle Harold ; Huntley Mark, External emitter for drip irrigation hose.
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Roberts John C. ; Butler Jack, Flow channel for drip irrigation with biased cavity.
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Jacobson, James D.; Bui, Tuan; Garchow, Stephen R.; Yardimci, Atif; Slepicka, James S., Fluid delivery system and flow control therefor.
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Jacobson, James D.; Bui, Tuan; Garchow, Stephen R.; Yardimci, Atif; Slepicka, James S., Fluid delivery system and flow control therefor.
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Jacobson, James D.; Bui, Tuan; Garchow, Stephen R.; Yardimci, Atif; Slepicka, James S., Fluid delivery system and flow control therefor.
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Lonky, Neal Marc, Frictional tissue sampling and collection method and device.
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Lonky, Neal Marc; Lonky, Martin L, Frictional trans-epithelial tissue disruption and collection apparatus and method of inducing or augmenting an immune response.
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Lonky, Neal M, Frictional trans-epithelial tissue disruption collection apparatus and method of inducing an immune response.
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Lonky, Neal Marc; Lonky, Martin L, Frictional trans-epithelial tissue disruption collection apparatus and method of inducing an immune response.
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Todorovic, Predrag, Method for the manufacture of an ejector nozzle tube.
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Zakarian, Berj; Feith, Raymond P.; Edris, Mark Richard; Ensworth, Mark M., Methods and apparatus for transporting elastomeric emitters and/or manufacturing drip lines.
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Bertolotti, Giacomo; Bertolotti, Fabio P, Pressure compensated discharge emitter.
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Lee, Chong Won, Pressure-compensation drip tape.
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Kruer,Thomas R.; Thompson,Hugh A., Unitized mat to facilitate growing plants.
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