WO1995033151A1 - Electromagnetically operated tube pinch valve - Google Patents

Electromagnetically operated tube pinch valve Download PDF

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Publication number
WO1995033151A1
WO1995033151A1 PCT/DK1995/000205 DK9500205W WO9533151A1 WO 1995033151 A1 WO1995033151 A1 WO 1995033151A1 DK 9500205 W DK9500205 W DK 9500205W WO 9533151 A1 WO9533151 A1 WO 9533151A1
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WO
WIPO (PCT)
Prior art keywords
armature
rod
tube
cup
solenoid
Prior art date
Application number
PCT/DK1995/000205
Other languages
French (fr)
Inventor
Sven Karl Lennart Goof
Original Assignee
Sven Karl Lennart Goof
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 Sven Karl Lennart Goof filed Critical Sven Karl Lennart Goof
Publication of WO1995033151A1 publication Critical patent/WO1995033151A1/en

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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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/022—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising a deformable member
    • F16K11/027—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising a deformable member the fluid flowing through a constrictable tubular diaphragm
    • 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
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
    • F16K7/04—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force
    • F16K7/045—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force by electric or magnetic means

Definitions

  • the present invention relates to an electromagnetically operated tube pinch valve comprising a solenoid surrounding a magnetizable core part, a movable armature part mounted for attraction to the core part when the solenoid is electrically energized, and a pinch device operated by the movable armature part and designed for locally pinching at least one elastic tube.
  • the prior art comprises pinch valves of this type in which the magnetic flux lines around the solenoid are extending more or less through air, when the solenoid is electrically energized.
  • the generation of a necessary pinching force which is determined by the nature of the tube and by the valve function in general, will require additional electric power in order to compensate for losses in the energized state of the valve.
  • the tube pinch valve of this invention which is characterized by the core part being arranged as a central column interiorly on a bottom of a generally cup-shaped stationary armature part enclosing the solenoid, by the movable armature part being generally disk-shaped and arranged as a lid for the cup-shaped armature part, and by the movable armature disk being mounted on a first end of an operating rod which is supported axially movable in a central bore through the core column, a second end of the rod extending through the bottom of the armature cup and into a base part to operate the pinch device.
  • the armature disk When the solenoid is electrically energized the armature disk can make full contact with the rim of the armature cup and preferably also at the same time with the free end of the core column. As a consequence the magnetic circuit can be completely closed in the energized condition of the solenoid, and the magnetic flux lines can extend exclusively through iron.
  • fig. 1 is a schematic view showing an axial cross-section through a first embodiment of the type N.O. - normally open,
  • fig. 2 is a schematic view showing an axial cross-section through a second embodiment of the type N.C. - normally closed,
  • fig. 3 is an axial section (A-A in Fig. 4) through an example of a base part for a valve as that of fig. 1 ,
  • fig. 4 is a plan view showing the base part in fig. 3,
  • fig. 5 is an axial section (B-B in fig. 6) through an example of a base part for a valve as that of fig. 2 and/or that of fig. 1 ,
  • fig. 6 is a plan view showing the base part in fig. 3,
  • fig. 7 is an axial cross-sectional view schematically showing an example of a dual valve according to the invention.
  • fig. 8 is an axial cross-section at right angles to that of fig. 7.
  • Fig. 1 of the drawing is schematically illustrating the arrangement of a first pinch valve according to the invention.
  • a wire coil or solenoid 2 preferably wound onto an appropriate coil form 4, is seated around a core part 6 of a magnetizable material such as iron, and the solenoid has appropriate terminals (not shown) for connection with an electric voltage supply.
  • the core part 6 is erected as a central portion of the core part 6 of a magnetizable material such as iron, and the solenoid has appropriate terminals (not shown) for connection with an electric voltage supply.
  • the core part 6 is erected as a central
  • SUBSTITUTE SHEET 3 column interiorly on the bottom of a stationary and cup - shaped armature 8 made of a magnetizable material such as iron.
  • This armature cup 8 encloses the solenoid 2 preferably with the free rim of the cup being in level with the free end of the core column 6.
  • a movable armature part 10 of a magnetizable material such as iron is designed as a generally disk-shaped part which is attracted as a lid to the rim of the armature cup and to the end of the core column, when the solenoid 2 is electrically energized.
  • the armature disk 10 is a plane disk or plate as illustrated, but other designs are applicable.
  • the essential feature is that the armature disk 10 should make direct metal contact with the rim of the armature cup 8 and preferably also at the same time with the free end of the core column 6, when the solenoid 2 is energized and the armature disk 10 is fully attracted.
  • the armature disk 10 is mounted on one end of a rod 12, preferably by means of a through hole with threads in the disk and a counter nut 14.
  • the rod 12 is supported axially movable in a central bore through the core column 6, the second end of the rod extending out through the bottom of the armature cup 8 and into a base part 16.
  • the base part 16 which is indicated schematically in fig. 1 , includes a pinch device for locally pinching at least one elastic tube 18.
  • Fig. 1 shows a tube pinch valve according to the invention of the type normally open (N.O.) wherein the second end of the rod 12 is operating the pinch device to collapse and close the tube 18 for flow therethrough, when the solenoid 2 is energized.
  • the second end of the rod 12 may be designed in several different manners, for example with a plate disk or with an eye or similar means through which the tube 18 is threaded.
  • the second end of the operating rod 12 is connected with a cross-rod 20 which is adapted for contact with the tube 18.
  • the cross-rod 20 may also act on several tubes simultaneously against an appropriate counter part 22.
  • Fig. 2 shows an embodiment of the type normally closed (N.C.). At least one tube 26 is kept resiliently collapsed and closed when the solenoid is currentless.
  • the arrangement of solenoid core part, armature cup, armature disk and operating rod corresponds to that described in connection with fig. 1.
  • a compression spring 24 in the base part 16.
  • the spring 24 acts on the second end of the operating rod 12 and is continuously tending to lift the armature disk 10 from the rim of the armature cup 8 through the operating rod 12.
  • the second rod end in the base part 16 can be designed in several ways.
  • the rod end has a cross-rod 20 which is adapted for contact with at least one tube 26.
  • the tube 26 is inserted between the cross-rod 20 and the bottom surface of the armature cup 8, so that the spring 24 will keep the tube collapsed and closed when the solenoid 2 is currentless.
  • Figs 3 and 4 are showing an example of a base part 16 for a valve as that of fig. 1.
  • a base plate 28 is designed with a tube groove 30 having a depth and width sufficient for the tube 18 to extend freely through the groove supported on the bottom surface of the groove.
  • a guiding slot 32 designed and adapted to accommodate and movably guide the cross-rod 20, when the base plate 28 is attached to the bottom surface of the armature cup 8.
  • Figs 5 and 6 are showing a similar base plate 28 in which the tube groove 30 has an enlarged width so that several tubes can be placed and supported simultaneously in the groove.
  • This base plate is therefor suitable for the armature cup in fig. 2, and also for the armature cup in fig. 1 when several tubes 18 are to be used and operated simultaneously.
  • the base plate 28 is preferably made of a non-magnetizable material such as brass or plastic.
  • the respective base plates 28 may be removably attached to the bottom surface of the armature cup 8, with the base plates being oriented as indicated in fig. 3 and in fig. 5, respectively.
  • the valve unit is easy to change from type N.O. to type N.C. and vice versa.
  • Figs 7 and 8 are showing a further embodiment which has been made by
  • a first base plate 28 is attached to the armature cup 8 in a similar manner as in connection with figs 1 and 3. Thereby a first and normally open valve function has been provided in which a cross-rod 20 or the like is operating a first tube 42.
  • a second base plate 28 is attached to the first base plate, the two base plates 28 being oriented bottom to bottom and with the respective holes 34 being aligned two by two.
  • a U-shaped yoke 36 is inserted in the second or outer base plate 28 with the legs of the yoke being inserted through the respective aligned holes 34 to engage the cross-rod 20 in the guiding slot 32 of the first or inner base plate 28.
  • a cover plate 40 is attached to the outer base plate 28 with an appropriate compression spring 38 being placed between the cover plate 40 and the yoke 36 in the outer base plate.
  • figs 7 and 8 is thereby a dual valve which is operating the two tubes 42 and 44 simultaneously.
  • base plates 28 similar to that of figs 3 and 4 have been used.
  • one or both of the base plates 28 in fig. 7 could also be similar to that of figs. 5 and 6. Thereby several tubes could be operated simultaneously in the inner as well as in the outer base plate 28. Moreover the inner base plate 28 may also operate one or more tubes in a similar manner as the tube 26 in fig. 2.
  • a common feature of embodiments of the tube pinch valve of the invention is accordingly the stationary cup-shaped armature part 8 having the movable armature disk 10 arranged at the open end of the armature cup and the base part 16 with the tube pinching device arranged at the other closed end.
  • the armature cup 8 and the central core column 6 therein may be made in one piece, but may also be made of several interconnected parts.
  • the respective base plates 28 may have the same contour as the armature cup 8.
  • the attachment of the base plates 28 to the armature cup 8 is preferably made by appropriate screws extending through holes (not shown) in the base plates 28 and into aligned, threaded holes in the bottom of the armature cup.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

An electromagnetically operated tube pinch valve includes a solenoid (2) which surrounds a magnetizable core (6), and a movable armature (10) is mounted for attraction to the core by electrically energizing the solenoid. A pinching device is operated by the movable armature and is adapted to locally collapse and close at least one elastic tube (18). The core (6) is erected as a central column interiorly on the bottom of a stationary cup-shaped armature (8) which encloses the solenoid (2), and the movable armature (10) is designed as a lid for the armature cup. The armature lid (10) is mounted on one end of a rod (12) which is axially movable in a central bore through the core column (6). The other end of the rod (12) extends out through the bottom of the armature cup and into a base part (16) in order to operate the pinching device (20, 22). When the solenoid (2) is current-carrying the armature lid (10) is able to fully engage the rim of the armature cup and, at the same time, the end of the core column. Optimum electromagentic conditions have thereby been provided, and a predetermined necessary tube pinching force can be generated and maintained with a minimum of electric power consumption.

Description

Electromagnetically operated tube pinch valve
The present invention relates to an electromagnetically operated tube pinch valve comprising a solenoid surrounding a magnetizable core part, a movable armature part mounted for attraction to the core part when the solenoid is electrically energized, and a pinch device operated by the movable armature part and designed for locally pinching at least one elastic tube.
The prior art comprises pinch valves of this type in which the magnetic flux lines around the solenoid are extending more or less through air, when the solenoid is electrically energized. As a consequence the generation of a necessary pinching force which is determined by the nature of the tube and by the valve function in general, will require additional electric power in order to compensate for losses in the energized state of the valve.
It is an object of this invention to provide a particularly efficient pinch valve, whereby a predetermined pinching force can be provided and maintained with a substantially lower electric power consumption than in corresponding tube pinch valves of the prior art.
The object is achieved by the tube pinch valve of this invention which is characterized by the core part being arranged as a central column interiorly on a bottom of a generally cup-shaped stationary armature part enclosing the solenoid, by the movable armature part being generally disk-shaped and arranged as a lid for the cup-shaped armature part, and by the movable armature disk being mounted on a first end of an operating rod which is supported axially movable in a central bore through the core column, a second end of the rod extending through the bottom of the armature cup and into a base part to operate the pinch device.
When the solenoid is electrically energized the armature disk can make full contact with the rim of the armature cup and preferably also at the same time with the free end of the core column. As a consequence the magnetic circuit can be completely closed in the energized condition of the solenoid, and the magnetic flux lines can extend exclusively through iron.
SUBSTITUTE SH The electromagnetic conditions are thereby at an optimum, so that a required valve operating force can be provided and maintained with a minimum of electrical power consumption.
Further details and features of the invention will be explained in the specification to follow based on embodiments and with reference to the drawing in which
fig. 1 is a schematic view showing an axial cross-section through a first embodiment of the type N.O. - normally open,
fig. 2 is a schematic view showing an axial cross-section through a second embodiment of the type N.C. - normally closed,
fig. 3 is an axial section (A-A in Fig. 4) through an example of a base part for a valve as that of fig. 1 ,
fig. 4 is a plan view showing the base part in fig. 3,
fig. 5 is an axial section (B-B in fig. 6) through an example of a base part for a valve as that of fig. 2 and/or that of fig. 1 ,
fig. 6 is a plan view showing the base part in fig. 3,
fig. 7 is an axial cross-sectional view schematically showing an example of a dual valve according to the invention, and
fig. 8 is an axial cross-section at right angles to that of fig. 7.
Fig. 1 of the drawing is schematically illustrating the arrangement of a first pinch valve according to the invention. A wire coil or solenoid 2, preferably wound onto an appropriate coil form 4, is seated around a core part 6 of a magnetizable material such as iron, and the solenoid has appropriate terminals (not shown) for connection with an electric voltage supply. The core part 6 is erected as a central
SUBSTITUTE SHEET 3 column interiorly on the bottom of a stationary and cup - shaped armature 8 made of a magnetizable material such as iron. This armature cup 8 encloses the solenoid 2 preferably with the free rim of the cup being in level with the free end of the core column 6.
A movable armature part 10 of a magnetizable material such as iron, is designed as a generally disk-shaped part which is attracted as a lid to the rim of the armature cup and to the end of the core column, when the solenoid 2 is electrically energized.
In the simplest embodiment, the armature disk 10 is a plane disk or plate as illustrated, but other designs are applicable. The essential feature is that the armature disk 10 should make direct metal contact with the rim of the armature cup 8 and preferably also at the same time with the free end of the core column 6, when the solenoid 2 is energized and the armature disk 10 is fully attracted.
The armature disk 10 is mounted on one end of a rod 12, preferably by means of a through hole with threads in the disk and a counter nut 14.
The rod 12 is supported axially movable in a central bore through the core column 6, the second end of the rod extending out through the bottom of the armature cup 8 and into a base part 16.
The base part 16 which is indicated schematically in fig. 1 , includes a pinch device for locally pinching at least one elastic tube 18.
Fig. 1 shows a tube pinch valve according to the invention of the type normally open (N.O.) wherein the second end of the rod 12 is operating the pinch device to collapse and close the tube 18 for flow therethrough, when the solenoid 2 is energized. For that purpose the second end of the rod 12 may be designed in several different manners, for example with a plate disk or with an eye or similar means through which the tube 18 is threaded. In a preferred embodiment the second end of the operating rod 12 is connected with a cross-rod 20 which is adapted for contact with the tube 18. The cross-rod 20 may also act on several tubes simultaneously against an appropriate counter part 22.
When the solenoid 2 is current-carrying the armature disk 10 will be attracted efficiently and thereby move the rod 12 and cross-rod 20 to pinch and collapse the tube 18. When the current in the solenoid 2 is interrupted the rod 12 and armature disk 10 will be returned by the resilient force from the tube itself, possibly combined with a (not shown) return spring.
Thereby the tube will be open for flow therethrough, when the solenoid 2 is currentless.
Fig. 2 shows an embodiment of the type normally closed (N.C.). At least one tube 26 is kept resiliently collapsed and closed when the solenoid is currentless. In the embodiment shown the arrangement of solenoid core part, armature cup, armature disk and operating rod corresponds to that described in connection with fig. 1.
In order to provide the N.C. valve function there is inserted a compression spring 24 in the base part 16. The spring 24 acts on the second end of the operating rod 12 and is continuously tending to lift the armature disk 10 from the rim of the armature cup 8 through the operating rod 12.
As in fig. 1 the second rod end in the base part 16 can be designed in several ways. In the embodiment shown the rod end has a cross-rod 20 which is adapted for contact with at least one tube 26. The tube 26 is inserted between the cross-rod 20 and the bottom surface of the armature cup 8, so that the spring 24 will keep the tube collapsed and closed when the solenoid 2 is currentless.
When the solenoid is current-carrying the armature disk 10 will be attracted
SUBSTITUTE SHEET against the force of the spring 24 whereby the tube 26 will be open for flow therethrough.
Figs 3 and 4 are showing an example of a base part 16 for a valve as that of fig. 1. A base plate 28 is designed with a tube groove 30 having a depth and width sufficient for the tube 18 to extend freely through the groove supported on the bottom surface of the groove.
Transverse to the tube groove 30 there is a guiding slot 32 designed and adapted to accommodate and movably guide the cross-rod 20, when the base plate 28 is attached to the bottom surface of the armature cup 8. Figs 5 and 6 are showing a similar base plate 28 in which the tube groove 30 has an enlarged width so that several tubes can be placed and supported simultaneously in the groove. This base plate is therefor suitable for the armature cup in fig. 2, and also for the armature cup in fig. 1 when several tubes 18 are to be used and operated simultaneously.
In the bottom of the guiding slot 32 there may be provided two through-holes 34, the purpose of which will be explained in connection with figs. 7 and 8.
The base plate 28 is preferably made of a non-magnetizable material such as brass or plastic.
In fig. 1 as well as in fig. 2 the respective base plates 28 may be removably attached to the bottom surface of the armature cup 8, with the base plates being oriented as indicated in fig. 3 and in fig. 5, respectively. In this manner the valve unit is easy to change from type N.O. to type N.C. and vice versa. Moreover it is easy to adapt the valve unit to the type, size and number of tubes 18, 26 to be operated.
Such changes or adaptations will only require an exchange of the base plate 28.
Figs 7 and 8 are showing a further embodiment which has been made by
SUBSTITUTE SHEET elaborating the base part. A first base plate 28 is attached to the armature cup 8 in a similar manner as in connection with figs 1 and 3. Thereby a first and normally open valve function has been provided in which a cross-rod 20 or the like is operating a first tube 42.
A second base plate 28 is attached to the first base plate, the two base plates 28 being oriented bottom to bottom and with the respective holes 34 being aligned two by two.
A U-shaped yoke 36 is inserted in the second or outer base plate 28 with the legs of the yoke being inserted through the respective aligned holes 34 to engage the cross-rod 20 in the guiding slot 32 of the first or inner base plate 28.
A cover plate 40 is attached to the outer base plate 28 with an appropriate compression spring 38 being placed between the cover plate 40 and the yoke 36 in the outer base plate.
Accordingly there is provided a second and normally open valve function whereby the yoke 36 is operating a second tube 44 in the tube groove 30 of the outer base plate 28.
The embodiment of figs 7 and 8 is thereby a dual valve which is operating the two tubes 42 and 44 simultaneously. In the embodiment shown, base plates 28 similar to that of figs 3 and 4 have been used.
Alternatively, one or both of the base plates 28 in fig. 7 could also be similar to that of figs. 5 and 6. Thereby several tubes could be operated simultaneously in the inner as well as in the outer base plate 28. Moreover the inner base plate 28 may also operate one or more tubes in a similar manner as the tube 26 in fig. 2.
When the armature disk is attracted and thereby moving the operating rod and
SUBSTITUTE SHEET cross-rod, the yoke 36 will be pushed back against the force from the spring 38. When the solenoid is currentless, the yoke 36 and thereby the cross-rod 20 will be returned to the starting or resting position by means of the spring 38.
During these valve movements the yoke 36 is efficiently guided not only in the holes 34, but also in the guiding slot 32 of the outer base plate 28.
A common feature of embodiments of the tube pinch valve of the invention is accordingly the stationary cup-shaped armature part 8 having the movable armature disk 10 arranged at the open end of the armature cup and the base part 16 with the tube pinching device arranged at the other closed end.
This provides the possibility of a compact and efficient valve unit which, moreover, is easy to change or supplement as needed. Furthermore, it is easy to adjust the valve stroke, because this is only a matter of adjusting the position of the armature disk 10 relative to the operating rod 12.
The armature cup 8 and the central core column 6 therein may be made in one piece, but may also be made of several interconnected parts.
The respective base plates 28 may have the same contour as the armature cup 8. The attachment of the base plates 28 to the armature cup 8 is preferably made by appropriate screws extending through holes (not shown) in the base plates 28 and into aligned, threaded holes in the bottom of the armature cup.
SUBSTITUTE SHEET

Claims

Claims 1. Electromagnetically operated tube pinch valve comprising a solenoid surrounding a magnetizable core part, a movable armature part mounted for attraction to said core part when said solenoid is electrically energized, and a pinch device operated by said movable armature part and designed for locally pinching at least one elastic tube, characterized by said core part (6) being arranged as a central column interiorly on a bottom of a generally cup-shaped stationary armature part (8) enclosing said solenoid (2), said movable armature part (10) being generally disk-shaped and arranged as a lid for said cup-shaped armature part (8), and said movable armature disk (10) being mounted on a first end of an operating rod (12) which is supported axially movable in a central bore through said core column (6), a second end of said rod extending through said bottom of said armature cup (8) and into a base part (16) to operate said pinch device (20,22).
2. Tube pinch valve according to claim 1 , characterized by said second end of said operating rod (12) having a cross-rod (20) designed and arranged for engaging said tube (18).
3. Tube pinch valve according to claim 2, characterized by said cross-rod (20) being inserted in a guiding slot (32) in said base part(28).
4. Tube pinch valve according to claim 2 or 3, characterized by said cross-rod (20) being engaged by a spring member (24) tending to move said operating rod (12) and armature disk (10) away from said armature cup (8).
5. Tube pinch valve according to claim 2, 3 or 4, characterized by said cross-rod (20) being in engagement with a U-shaped yoke (36) which is supported to follow the movements of said rod (12) and cross-rod (20).
SUBSTITUTE SHEET
PCT/DK1995/000205 1994-05-27 1995-05-24 Electromagnetically operated tube pinch valve WO1995033151A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK597/94940527 1994-05-27
DK59794A DK59794A (en) 1994-05-27 1994-05-27 Electromagnetically operated hose valve

Publications (1)

Publication Number Publication Date
WO1995033151A1 true WO1995033151A1 (en) 1995-12-07

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ID=8095367

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000205 WO1995033151A1 (en) 1994-05-27 1995-05-24 Electromagnetically operated tube pinch valve

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WO (1) WO1995033151A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607156A1 (en) * 1996-02-26 1997-08-28 Atomika Instr Gmbh Valve for real=time rapid on-line analysis and control in engine
EP0841509A1 (en) * 1996-08-30 1998-05-13 Siemens-Elema AB Flow regulator
CN109654250A (en) * 2018-12-20 2019-04-19 珠海优特智厨科技有限公司 Pinch valve
CN109654249A (en) * 2018-12-20 2019-04-19 珠海优特智厨科技有限公司 Pinch valve
US11131398B2 (en) 2018-08-14 2021-09-28 Automatic Switch Company Smart pinch valve
US11221078B2 (en) 2018-08-14 2022-01-11 Automatic Switch Company Pinch valve guard
IT202000025669A1 (en) * 2020-10-29 2022-04-29 De Longhi Appliances Srl VALVE DEVICE
WO2023067427A1 (en) * 2021-10-18 2023-04-27 Verdot Ips2 Pinching regulating valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4496133A (en) * 1982-03-02 1985-01-29 Akos Sule Pinch valve assembly
US4921206A (en) * 1988-12-20 1990-05-01 Coulter Electronics, Inc. Snap-together solenoid operated pinch valve assembly
US5078361A (en) * 1990-12-04 1992-01-07 Applied Biosystems Inc. Positive opening pinch valve
US5188334A (en) * 1990-11-24 1993-02-23 Horiba, Ltd. Pinch valve assembly with a storage mode

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4496133A (en) * 1982-03-02 1985-01-29 Akos Sule Pinch valve assembly
US4921206A (en) * 1988-12-20 1990-05-01 Coulter Electronics, Inc. Snap-together solenoid operated pinch valve assembly
US5188334A (en) * 1990-11-24 1993-02-23 Horiba, Ltd. Pinch valve assembly with a storage mode
US5078361A (en) * 1990-12-04 1992-01-07 Applied Biosystems Inc. Positive opening pinch valve

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607156A1 (en) * 1996-02-26 1997-08-28 Atomika Instr Gmbh Valve for real=time rapid on-line analysis and control in engine
DE19607156C2 (en) * 1996-02-26 1998-01-29 Atomika Instr Gmbh Flow valve
EP0841509A1 (en) * 1996-08-30 1998-05-13 Siemens-Elema AB Flow regulator
US5810324A (en) * 1996-08-30 1998-09-22 Siemens-Elema Ab Flow regulator with two solenoids
US11131398B2 (en) 2018-08-14 2021-09-28 Automatic Switch Company Smart pinch valve
US11221078B2 (en) 2018-08-14 2022-01-11 Automatic Switch Company Pinch valve guard
CN109654250A (en) * 2018-12-20 2019-04-19 珠海优特智厨科技有限公司 Pinch valve
CN109654249A (en) * 2018-12-20 2019-04-19 珠海优特智厨科技有限公司 Pinch valve
CN109654250B (en) * 2018-12-20 2020-05-22 珠海优特智厨科技有限公司 Pinch valve
IT202000025669A1 (en) * 2020-10-29 2022-04-29 De Longhi Appliances Srl VALVE DEVICE
WO2022091156A1 (en) * 2020-10-29 2022-05-05 De' Longhi Appliances S.R.L. Con Unico Socio Valve device
WO2023067427A1 (en) * 2021-10-18 2023-04-27 Verdot Ips2 Pinching regulating valve

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