[특허]Stretch hose and hose production method

Stretch hose and hose production method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16L-011/112 B29D-023/18 B29C-071/02 B29L-023/00
출원번호	US-0120981 (2014-07-18)
등록번호	US-9964238 (2018-05-08)
발명자 / 주소	Forrester, Martin E Garrett, Carl J
출원인 / 주소	GlobalMed, Inc.
대리인 / 주소	Burge, David A.
인용정보	피인용 횟수 : 0 인용 특허 : 74

초록 ▼

An extensible-retractable helically reinforced hose is formed by helically wrapping a freshly extruded bead of thermoplastic material about a rotating mandrel to form a helical array of spaced reinforcing coils, and by helically wrapping a freshly extruded thin yet wide web of thermoplastic material so edge regions of the wide web are placed onto and bond continuously with the peripheries of each adjacent pair of the reinforcing coils, with a leading edge region of each new wrap of the web overlying and bonding to a trailing edge region of a prior web wrap. Central portions of each web wrap extend radially inwardly and are sandwiched between adjacent reinforcing coils when the hose is retracted to a minimal axial length.

대표청구항 ▼

1. A hose production method comprising the steps of: 1) concurrently and continuously extruding both a strand-like bead of thermoplastic material of substantially uniform cross-section, and a relatively wide, relatively thin, tape-like web of thermoplastic material of substantially uniform cross-section and having equidistantly spaced, continuously extending edge regions;2) wrapping the freshly extruded strand-like bead around and in engagement with peripheral portions of a rotating mandrel to provide a substantially uniformly spaced array of reinforcing coils for a hose that is being formed so as to extend along a central axis of the rotating mandrel;3) helically wrapping the freshly extruded web about the rotating mandrel with the equidistantly spaced edge regions of the wrapped web continuously contacting and substantially immediately bonding to outer peripheral portions of each adjacent pair of the reinforcing coils, and with each new helical wrap of the web having a leading one of the equidistantly spaced edge regions overlapping and bonding substantially immediately and continuously to a trailing one of the equidistantly spaced edge regions of a previous wrap of the web; and4) annealing the hose while the hose is axially compressed to cause central portions of the web that extend between adjacent ones of the reinforcing coils to extend inward toward the central axis when the hose is subsequently axially compressed a minimal axial length. 2. The hose production method of claim 1 additionally including the step of cutting a discrete length of hose from the hose produced by the method. 3. The hose production method of claim 2 additionally including the step of treating the discrete length of hose to diminish such stress as may have been instilled in the discrete length of hose. 4. The hose production method of claim 3 wherein treating the discrete length of hose comprises relaxing molecules of the thermoplastic material such that stress is substantially absent from the hose when the hose is retracted to the minimal axial length. 5. The hose production method of claim 1 additionally including the step of treating the hose while axially compressed to effect cross-linking. 6. The hose production method of claim 1 wherein the central portions define at least part of an interior diameter of the hose when the hose is retracted to the minimal axial length after the annealing. 7. The hose production method of claim 1 additionally including the step of annealing the hose to set a reverse-turn fold in the central portions of the web while the hose is axially compressed to the minimal axial length to cause the central portions of the web to return to the reverse-turn fold when the hose is retracted to the minimal axial length after the annealing. 8. The hose production method of claim 7 wherein, at the reverse-turn fold, the central portions extend along the central axis when the hose is retracted to the minimal axial length after annealing. 9. The hose production method of claim 7 wherein the hose exhibits a noticeable snap action when at least a portion of the reverse-turn fold unfolds during an axial extension of the hose from the minimal axial length after the annealing.

이 특허에 인용된 특허 (74)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Stretch hose and hose production method 원문보기

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Stretch hose and hose production method 원문보기

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