GB2412714A - Shape memory polymer valve - Google Patents

Shape memory polymer valve Download PDF

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Publication number
GB2412714A
GB2412714A GB0407395A GB0407395A GB2412714A GB 2412714 A GB2412714 A GB 2412714A GB 0407395 A GB0407395 A GB 0407395A GB 0407395 A GB0407395 A GB 0407395A GB 2412714 A GB2412714 A GB 2412714A
Authority
GB
United Kingdom
Prior art keywords
smp
plug
flow
slit
bulkhead
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0407395A
Other versions
GB0407395D0 (en
Inventor
Geoffrey Andrew Pink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0407395A priority Critical patent/GB2412714A/en
Publication of GB0407395D0 publication Critical patent/GB0407395D0/en
Publication of GB2412714A publication Critical patent/GB2412714A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
    • F16K15/147—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery the closure elements having specially formed slits or being of an elongated easily collapsible form

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Valve Housings (AREA)

Abstract

A valve comprises a tube A fitted with an internal divider, the divider being pierced to allow flow. The downstream side of the internal divider has a plug B of shape memory polymer fixed to or sealed against the tube at its circumference; a slit C pierces through the plug B. Application of pressure through the divider will cause the plug B to deform until the slit is forced open, thus allowing through-flow, until the loss of pressure (or equalisation) causes the plug to revert to its original shape in order to effect a total seal. Reverse flow is prevented since the divider prohibits the plug deforming in this direction. The adhesive quality of the SMP material will form an envelope around contaminant particles that become trapped in the seal.

Description

SHAPE MEMORY POLYMER (SMP) VALVE The invention relates to a shape memory
polymer (SMP) valve.
There is requirement in industry for a reliable governable one way valve with no mechanical moving parts that will open under pressure, close automatically when not under pressure and upon application of reverse pressure will close absolutely with no reverse seepage despite the presence of small particle contaminants.
According to the present invention there is provided a valve as abovedescribed which may be configured for use with pressure or gravity fed systems and made suitable for liquid or gas with no risk of corrosion or static electricity.
The shape memory polymer (SMP) valve in its simplest form can comprise a tube fitted with an immovable internal obstructive bulkhead suitably pierced to allow flow. Against the downflow side of the bulkhead is a plug of SMP material fixed to or sealed against the tube at its circumference. The SMP plug is slit through across its centre essentially by equal dimension from centre. Upon application of pressure through the bulkead the SMP will bubble until its slit is forced open and flow occurs. Flow will commence at pressure determined by the SMP composition, its thickness and size of the slit. Flow can occur of liquid or gas or mix and will continue until loss of pressure or equalization whereupon the SMP will revert to its original shape causing total seal, The adhesive quality of SMP closing surfaces is such that small particle contaminants trapped within are enveloped in the seal. Reverse flow is halted by the inability of the SMP material to distort in the opposite direction being obstructed by the bulkhead set above it.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:-.
Figure 1. A plan of a Shape Memory Polymer Valve.
Figure 2. A variant.
Referring to Figure I. The valve comprises a Tube A with a fixed internal bulkhead suitably pierced to allow flow. On the downflow side and against the internal plate a plug of Shape Memory Polymeric (SMP) material B is fixed to the tube at its circumference and pierced across its centre at C. Referring to Figure 2. The shows the valve in variant of identical principle with the internal bulkhead itself reducing to a tube which is surrounded by an SMP plug similarly pierced.

Claims (1)

1. The shape memory polymer (SMP) valve in its simplest form can comprise a tube fitted with an immovable internal obstructive bulkhead suitably pierced to allow flow.
Against the downflow side of the bulkhead is a plug of SMP material fixed to or sealed against the tube at its circumference. The SMP plug is slit through across its centre essentially by equal dimension from centre. Upon application of pressure through the bulkhead the SMP will bubble until its slit is forced open and flow occurs.
Flow will commence at pressure determined by the SMP composition, its thickness and size of the slit. Flow can occur of liquid or gas or mix and will continue until loss of pressure or equalization whereupon the SMP will revert to its original shape causing total seal. The adhesive quality of SMP closing surfaces is such that small particle contaminants trapped within are enveloped in the seal. Reverse flow is halted by the inability of the SHIP material to distort in the opposite direction being obstructed by the bulkhead set above it.
GB0407395A 2004-04-01 2004-04-01 Shape memory polymer valve Withdrawn GB2412714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0407395A GB2412714A (en) 2004-04-01 2004-04-01 Shape memory polymer valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0407395A GB2412714A (en) 2004-04-01 2004-04-01 Shape memory polymer valve

Publications (2)

Publication Number Publication Date
GB0407395D0 GB0407395D0 (en) 2004-05-05
GB2412714A true GB2412714A (en) 2005-10-05

Family

ID=32247658

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0407395A Withdrawn GB2412714A (en) 2004-04-01 2004-04-01 Shape memory polymer valve

Country Status (1)

Country Link
GB (1) GB2412714A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016096776A1 (en) * 2014-12-18 2016-06-23 Fresenius Kabi Deutschland Gmbh Valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04276195A (en) * 1991-03-01 1992-10-01 Daikin Ind Ltd Oiling mechanism for sealed type compressor
WO2001028459A1 (en) * 1999-10-21 2001-04-26 Scimed Life Systems, Inc. Implantable prosthetic valve
US6565526B2 (en) * 2000-03-09 2003-05-20 The Regents Of The University Of California Bistable microvalve and microcatheter system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04276195A (en) * 1991-03-01 1992-10-01 Daikin Ind Ltd Oiling mechanism for sealed type compressor
WO2001028459A1 (en) * 1999-10-21 2001-04-26 Scimed Life Systems, Inc. Implantable prosthetic valve
US6565526B2 (en) * 2000-03-09 2003-05-20 The Regents Of The University Of California Bistable microvalve and microcatheter system
US6663821B2 (en) * 2000-03-09 2003-12-16 The Regents Of The University Of California Bistable microvalve and microcatheter system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016096776A1 (en) * 2014-12-18 2016-06-23 Fresenius Kabi Deutschland Gmbh Valve

Also Published As

Publication number Publication date
GB0407395D0 (en) 2004-05-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)