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WO2024076782A1 - Clapet anti-retour ayant des languettes d'ouverture - Google Patents

Clapet anti-retour ayant des languettes d'ouverture Download PDF

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Publication number
WO2024076782A1
WO2024076782A1 PCT/US2023/034752 US2023034752W WO2024076782A1 WO 2024076782 A1 WO2024076782 A1 WO 2024076782A1 US 2023034752 W US2023034752 W US 2023034752W WO 2024076782 A1 WO2024076782 A1 WO 2024076782A1
Authority
WO
WIPO (PCT)
Prior art keywords
check valve
disc
bill
tabs
affixed
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.)
Ceased
Application number
PCT/US2023/034752
Other languages
English (en)
Inventor
Michael J. Duer
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.)
Red Valve Co Inc
Original Assignee
Red Valve Co Inc
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 Red Valve Co Inc filed Critical Red Valve Co Inc
Publication of WO2024076782A1 publication Critical patent/WO2024076782A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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

Definitions

  • a check valve is essentially a valve which allows fluid flow in only one direction through a conduit, while closing and preventing back or reverse flow, when back pressure builds up downstream of the valve to a level greater than the upstream fluid pressure head.
  • a check valve is essentially a valve which allows fluid flow in only one direction through a conduit, while closing and preventing back or reverse flow, when back pressure builds up downstream of the valve to a level greater than the upstream fluid pressure head.
  • sewage treatment plants are often located at sea level and/or the lowest point possible of a municipality. They discharge a large quantity of water after treatment of sewage. Where such treatment plants discharge into a body of salt water, positive shut off is mandatory to prevent salt water intrusion. Salt water intrusion is the backflowing of salt water into the plant. Salt water intrusion must be prevented because salt water will destroy the ongoing biological treatment of sewage, forcing the plant to discharge raw sewage into the waterways, which is a situation that must be avoided.
  • the present invention is directed to a check valve that includes a tubular sleeve bounding a longitudinally-extending flow-through passage for fluids, said sleeve having an upstream fluid inlet end region adapted to be affixed to an effluent conduit and a downstream fluid outlet region.
  • the downstream fluid outlet region of said sleeve is integrally formed with a top wall, a pair of side walls, and a bill, and the downstream fluid outlet region of said sleeve provides a flow-through passage for said fluids.
  • the check valve further includes a disc affixed along a first portion of its periphery to a flexible member, said flexible member affixed to and interposed between said disc and at least one of said top wall and said pair of side walls of said sleeve. A second portion of the periphery of said disc opposite said first portion is affixed to said bill of said sleeve, and said disc opens said valve in response to positive differential pressure within said valve.
  • the bill is integrally formed with said side walls of said sleeve, said bill being formed of a flexible material, said bill forming a first opening for discharge of 5OA8961.
  • DOCX 2 Attorney Docket No.: 01164-2307793 fluid in response to a first positive differential pressure within said valve from said fluid, and said bill forming a seal to prevent backflow of said fluid through said valve when no differential pressure or negative differential pressure is present.
  • the check valve further includes one or more tabs affixed to at least one of said disc and said bill, each of said one or more tabs being adapted for connection to a cable for manually opening the disc. [0011] In some embodiments, each of said one or more tabs define an eyelet adapted for securement to the cable.
  • said one or more tabs are integrally formed with at least one of said disc and said bill. [0013] In some embodiments, at least a portion of each of said one or more tabs is vulcanized to at least one of said disc and said bill. [0014] In some embodiments, said one or more tabs are affixed to at least one of said disc and said bill via a connection member. [0015] In some embodiments, said one or more tabs comprise an elastomeric material. [0016] In some embodiments, said one or more tabs comprise a cloth member. [0017] In some embodiments, said one or more tabs are comprised of metal.
  • said one or more tabs comprise a first tab oriented longitudinally with respect to the tubular sleeve and a second tab parallel to the first tab.
  • said one or more tabs comprise a first tab oriented transversely with respect to the tubular sleeve.
  • the check valve further includes one or more grommets reinforcing said eyelets of each of said one or more tabs.
  • the present invention is directed to a check valve that includes a tubular sleeve bounding a longitudinally-extending flow-through passage for fluids, said sleeve having an upstream fluid inlet end region adapted to be affixed to an effluent conduit and a downstream fluid outlet region.
  • the downstream fluid outlet region of said sleeve is integrally formed with a top wall, a pair of side walls, and a bill, and the downstream fluid outlet region of said sleeve provides a flow-through passage for said fluids.
  • the check valve further includes a disc affixed along a first portion of its periphery to a flexible member, said flexible member affixed to and interposed between said disc and at least one of said top wall and said pair of side walls of said sleeve.
  • a second portion of the periphery of said disc opposite said first portion is affixed to said bill of said sleeve, and said disc opens said valve in response to positive differential pressure within said valve.
  • the bill is integrally formed with said side walls of said sleeve, said bill being formed of a flexible material, said bill forming a first opening for discharge of 5OA8961.
  • DOCX 3 Attorney Docket No.: 01164-2307793 fluid in response to a first positive differential pressure within said valve from said fluid, and said bill forming a seal to prevent backflow of said fluid through said valve when no differential pressure or negative differential pressure is present.
  • the check valve further includes one or more hooks affixed to at least one of said disc and said bill, each of said one or more hooks being adapted for connection to a cable for manually opening the disc.
  • the present invention is also directed to a check valve assembly that includes a check valve as described above, and a tubular body.
  • the check valve is at least partially integrally formed within the tubular body. [0023] In some embodiments, at least one of an upstream region of the tubular body and a downstream region of the tubular body is affixed to an interior portion of a conduit. [0024]
  • the present invention also includes the following aspects.
  • a check valve comprising: (a) a tubular sleeve bounding a longitudinally-extending flow-through passage for fluids, said sleeve having an upstream fluid inlet end region adapted to be affixed to an effluent conduit and a downstream fluid outlet region; (b) the downstream fluid outlet region of said sleeve being integrally formed with a top wall, a pair of side walls, and a bill, said downstream fluid outlet region of said sleeve providing a flow-through passage for said fluids; (c) a disc affixed along a first portion of its periphery to a flexible member, said flexible member affixed to and interposed between said disc and at least one of said top wall and said pair of side walls of said sleeve, wherein a second portion of the periphery of said disc opposite said first portion is affixed to said bill of said sleeve, and wherein said disc opens said valve in response to a first positive differential
  • Aspect 2 The check valve of aspect 1, where each of said one or more tabs define an eyelet adapted for securement to the cable.
  • Aspect 3 The check valve of aspect 1, wherein said one or more tabs are integrally formed with at least one of said disc and said bill. 5OA8961.DOCX 4 Attorney Docket No.: 01164-2307793
  • Aspect 4 The check valve of aspect 1, wherein at least a portion of each of said one or more tabs is vulcanized to at least one of said disc and said bill.
  • Aspect 5 The check valve of aspect 1, wherein said one or more tabs are affixed to at least one of said disc and said bill via a connection member.
  • Aspect 6 The check valve of aspect 1, wherein said one or more tabs comprise an elastomeric material.
  • Aspect 7 The check valve of aspect 1, wherein said one or more tabs comprise a cloth member.
  • Aspect 8 The check valve of aspect 1, wherein said one or more tabs are comprised of metal.
  • Aspect 9 The check valve of aspect 1, wherein said one or more tabs comprise a first tab oriented longitudinally with respect to the tubular sleeve and a second tab parallel to the first tab.
  • Aspect 10 The check valve of aspect 1, wherein said one or more tabs comprise a first tab oriented transversely with respect to the tubular sleeve.
  • a check valve comprising: (a) a tubular sleeve bounding a longitudinally-extending flow-through passage for fluids, said sleeve having an upstream fluid inlet end region adapted to be affixed to an effluent conduit and a downstream fluid outlet region; (b) the downstream fluid outlet region of said sleeve being integrally formed with a top wall, a pair of side walls, and a bill, said downstream fluid outlet region of said sleeve providing a flow-through passage for said fluids; (c) a disc affixed along a first portion of its periphery to a flexible member, said flexible member affixed to and interposed between said disc and at least one of said top wall and said pair of side walls of said sleeve, wherein a second portion of the perip
  • a check valve assembly comprising: (a) a check valve according to any one of aspects 1-12; and (b) a tubular body, wherein the check valve is at least partially integrally formed within the tubular body.
  • Aspect 14 The assembly of aspect 13, wherein at least one of an upstream region of the tubular body and a downstream region of the tubular body is affixed to an interior portion of a conduit.
  • Figure 1a is a side cutaway view of a prior valve as described in U.S. Patent No. 5,769,125.
  • Figure 1b is an end view of the valve of Figure 1a.
  • Figure 1c is a top view of the valve of Figure 1a.
  • Figure 1d a perspective cutaway view of the valve of Figure 1a.
  • Figure 2a is a side cutaway view of a check valve according to the present invention enclosed in an integral tubular body with the entire assembly installed in a conduit.
  • Figure 2b is a front view of the check valve and assembly of Figure 2a.
  • Figure 2c is a top cutaway view of the check valve and assembly of Figure 2a.
  • Figure 2d is a perspective cutaway view of the check valve and assembly of Figure 2a.
  • Figure 3 is a perspective cutaway view of a check valve according to the present invention that is rectangular in shape and which is installed in a concrete conduit.
  • Figure 4a is a side cutaway view of another embodiment of a check valve according to the present invention enclosed in an integral tubular body with the entire assembly installed in a conduit.
  • Figure 4b is a front view of the check valve and assembly of Figure 4a.
  • Figure 4c is a perspective cutaway view of the check valve and assembly of Figure 4a.
  • Figure 4d is a side cutaway view of the check valve and assembly of Figure 4a shown in an opened position.
  • Figure 4e is a front view of the check valve and assembly of Figure 4a shown in an opened position.
  • Figure 4f is a perspective cutaway view of the check valve and assembly of Figure 4a in an opened position.
  • Figure 5a is a side cutaway view of the check valve of Figure 4a having an opening tab.
  • Figure 5b is a front view of the check valve of Figure 5a in a closed position.
  • Figure 5c is a front view of the check valve of Figure 5a in an opened position.
  • Figure 5d is a side cutaway view of the check valve of Figure 5a in a closed position, showing a cable leading to ground level.
  • Figure 5e is a side cutaway view of the check valve of Figure 5d in an opened position.
  • Figure 6 is a front view of another embodiment of the check valve of Figure 5a in a closed position.
  • Figure 7a is a front view of another embodiment of the check valve of Figure 5a in a closed position.
  • Figure 7b is a front view of the check valve of Figure 7a in an opened position.
  • Figure 8a is a side cutaway view of another embodiment of the check valve of Figure 5a.
  • Figure 8b is a front view of the check valve of Figure 8a.
  • Figure 9 is a front view of the check valve of another embodiment of the check valve of Figure 5a.
  • Figure 10 is a side cutaway view of another embodiment of the check valve of Figure 5a DESCRIPTION OF THE INVENTION [0067]
  • the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary.
  • any numerical range recited herein is intended to include all sub-ranges subsumed therein.
  • a range of “1 to 10” is intended to include all sub-ranges between (and including) the recited minimum value of 1 and the recited maximum value of 10, that is, having a minimum value equal to or greater than 1 and a maximum value of equal to or less than 10.
  • differential pressure refers to the difference between the upstream and downstream pressures.
  • a “positive differential pressure” refers to a condition where the upstream pressure is greater than the downstream pressure. This is also referred to as “headloss”.
  • a “negative differential pressure” refers to a condition where the downstream pressure is greater than the upstream pressure. This is also referred to 5OA8961.DOCX 8 Attorney Docket No.: 01164-2307793 as “backpressure”.
  • a check valve 10 is shown mounted at a discharge end of a conduit 12, from which fluids are discharged in the direction shown by the arrows A and A'.
  • the conduit 12 may be a storm sewer, an industrial waste pipe, or any pipe which discharges an effluent into a river, creek, ocean, or analogous waterway, or a chemical reaction vessel or any vessel known in the art where it is desired to discharge a fluid while preventing backflow into the conduit 12.
  • the valve 10 generally comprises a sleeve 14, which bounds a longitudinally- extending flow-through passage for the effluent fluid which may be a gas, liquid, or slurry, such as raw sewage, storm rain water, sludge, chemical slurry, scum paper stock, tailings slurry, or any industrial waste. More specifically, the sleeve 14 has a generally tubular upstream fluid inlet region 16, which is either mounted on or within the discharge end of conduit 12. [0076] Fluid inlet region 16 may be secured to the exterior of conduit 12 by any devices commonly known in the art such as bands, clamps, etc. Alternatively, fluid inlet region 16 may be affixed to the interior of conduit 12 by means known in the art.
  • fluid inlet region 16 may include a flange which corresponds to a mating flange of conduit 12, and the two flanges, when mated, may be secured to each other by any means known in the art, such as bolts, nuts, and the like.
  • the sleeve 14 terminates at a second downstream end with a fluid outlet region 18.
  • Fluid outlet region 18 is in turn integrally associated with a trough 20.
  • Trough 20 is shown in Figures 1a, 1b, and 1c as semi-cylindrical in design, but it is to be understood that it could be designed as a U-shaped or V-shaped channel or the like.
  • sleeve 14 and trough 20 are formed of materials having sufficient strength to support the weight and pressure of effluent flowing through valve 5OA8961.
  • DOCX 9 Attorney Docket No.: 01164-2307793 10. This material may take the form of one or more layers or plies of elastomeric material with or without reinforcing fabric.
  • Valve 10 further includes disc 30 as shown in Figures 1a through 1d.
  • Disc 30 is composed of an elastomeric material and is affixed to fluid outlet region 18 of sleeve 14 via flexible member 32, which is in the nature of an elastomeric hinge.
  • the width of disc 30, as shown along line B-B in Figure 1d is coextensive with the distance between side walls 24, 26 of valve 10, thereby forming a seal against fluid from backflowing through valve 10 into conduit 12, with additional sealing being accomplished by bill 36.
  • the length of disc 30 as measured along line C-C of Figure 1d, and extending from flexible member 32 to bottom wall 22 of trough 20, must be longer than the interior diameter of sleeve 14. As shown in Figures 1a through 1d, this will prevent disc 30 from assuming a perpendicular or 90 degree angle with bottom wall 22, but will instead, ensure that disc 30 in a closed position assumes the inclined plane position as shown in Figures 1a through 1d.
  • Flexible member 32 may be any hinge known in the art, but is typically an elastomeric hinge comprised of one or more plies of an elastomeric material, or fabric reinforced elastomeric material. Flexible member 32 may be of “tire-cord” design, which is a polyester fabric that has considerable strength in one direction and is very flexible at right angles to the first direction. Further, the flexible member 32 may be made with a lower durometer rubber to provide greater flexibility in this area.
  • the check valve 10 can be enclosed in an integral tubular body 17 which, in turn, is installed in a conduit 12 such as a pipe.
  • a check valve assembly that includes any of the previously described check valves 10, an integral tubular body 17, and conduit 12.
  • the check valve assembly provides a simple means to install a valve 10 and integral body 17 assembly inside a 5OA8961.
  • DOCX 10 Attorney Docket No.: 01164-2307793 conduit 12 at the discharge end without the necessity of having access to the upstream end of the valve 10, which in the case of small valves (less than 18 inches) is virtually impossible to do, and in the case of larger valves is inconvenient.
  • the downstream region 19 of the tubular body 17 may be affixed to the interior of the conduit 12 by means known in the art, such as internal expanding clamps.
  • downstream region 19 may include a flange which corresponds to a mating flange on the conduit 12, and the two flanges, when mated, may be secured to each other by any means known in art, such as with bolts, nuts, and the like.
  • fluid inlet region 16 may include a flange which corresponds to a mating flange affixed to the downstream end of conduit 12, and the two flanges, when mated, may be secured to each other by any means known in the art, such as bolts, nuts, and the like.
  • the check valve 10 When the check valve 10 is integral with a tubular body 17, the entire lower portion of the check valve 10, below the plane of the horizontal centerline of the valve 10, is vulcanized to the tubular body 17. Further, the portions of the check valve 10, above the plane of the horizontal centerline of the valve 10 that are in contact with the tubular body 17 when the valve 10 is fully closed, are vulcanized together. These vulcanized regions 13 are shaded in Figure 2d. As further shown in Figure 2d, the bill 36 and disc 30 of the valve 10 are not vulcanized to the tubular body 17 and are free to move upward allowing the valve 10 to open and discharge flow. As such, the bill 36 and disc 30 of the check valve 10 are separated from the interior portions of the tubular body 17.
  • the check valve 10 of the present invention can have a circular shape.
  • the check valve 10 is a different shape including, but not limited to, a rectangular, square, oval, or elliptical shape.
  • Figure 3 illustrates a rectangular shaped check valve 90 having a rectangular disc 91 that is installed in a concrete conduit 92.
  • Figure 4a to 4f another embodiment of the check valve 10 is shown.
  • the fluid outlet region 18 is generally tubular instead of including trough 20.
  • the sleeve 14 includes a top wall 21, side walls 24, 26, and bill 36 attached to or integral with the disc 30.
  • the sleeve 14 and wall components thereof may be constructed substantially as described in reference to Figures 1a-2d.
  • the connection between the disc 30 and at least a portion of the top wall 21 and side walls 24, 26 is defined by a flexible member 32.
  • the flexible member 32 may be constructed substantially as described in reference to Figures 1a-2d. 5OA8961.DOCX 11 Attorney Docket No.: 01164-2307793 [0087]
  • the top wall 21, side walls 24, 26, and bill 36 define the tubular structure of the sleeve 14, which in some embodiments is adapted for connection to a tubular body 17.
  • the top wall 21 of the sleeve 14 may be vulcanized to the tubular body 17, but at least a portion of the sleeve 14, such as at least a portion of the side walls 24, 26 and the bill 36, are not vulcanized to or otherwise connected to the tubular body 17, such that the bill 36 may be deflected toward the top wall 21 responsive to fluid flow and/or pressure.
  • the tubular body 17 may include circumferential or partially circumferential retaining shoulder 23 adapted to receive a corresponding ridge of the top wall 21, side walls 24, 26, and/or bill 36, thereby locating the sleeve 14 in the tubular body 17.
  • FIG. 4d and 4e show the check valve 10 in an opened position, in which the disc 30 is biased by the flow of effluent toward the top wall 21.
  • the side walls 24, 26 at least partially fold over and the bill 36 separates from the tubular body 17, allowing the effluent to pass from the fluid inlet regions 16 to the fluid outlet region 18.
  • the check valve 10 of the present invention may include at least one opening tab 40 affixed to at least one of the disc 30 and the bill 36.
  • Each opening tab 40 may include an eyelet 41 or other suitable connection means known in the art for connection to a cable 50.
  • the cable may run from the eyelet 41 of the tab 40 to a ground surface 60 above the conduit 12, where the cable 50 may be connected to a winch or other pulling or winding device known in the art.
  • the cable may be routed through apertures in the check valve 10, conduit 12, and ground surface 60 between the tab 40 and the ground surface 60.
  • the cable 50 may be routed through the interior of the conduit 12 and up an existing orifice in the ground surface 60, such as a man hole. Other schemes of routing the cable 50 to the ground surface 60 may be appreciated by those skilled in the art.
  • the disc 30 is opened to permit fluid flow between the fluid inlet region 16 and the fluid outlet region 18 of the check valve 10.
  • the check valve 10 may be opened manually, without a differential pressure between the fluid inlet region 16 and the fluid outlet region 18.
  • the check valve 10 may be manually opened to allow service or maintenance to be performed within the conduit (12), or to permit effluent flow when an insufficient differential pressure exists to automatically open the check valve (10).
  • Other benefits and uses for manually opening the check valve 10 may be appreciated by those skilled in the art.
  • a single tab 40 may be affixed to the disc 30 of the check valve 10 for connection to the cable 50.
  • the tab 40 may be oriented longitudinally with respect to the sleeve 14, although other orientations may be utilized as discussed below.
  • the tab 40 may include an eyelet 41 that the cable may be threaded through or looped around to secure the cable 50 to the tab 40.
  • the tab 40 may be integrally formed with the disc 30 or bill 36, and may comprise an elastomeric material having the same composition as the surrounding region of the check valve 10. Further, the tab 40 may comprise a cloth member embedded in the elastomeric material.
  • the tab 40 may alternatively be a separate structure vulcanized to the check valve 10.
  • a grommet may be fastened to the eyelet 41 to reinforce the eyelet 41 and prevent tearing of the tab 40 due to tension from the cable 50.
  • the entirety of the tab 40 or a portion of the tab 40 may be composed of a rigid material such as metal and embedded into the disc 30 or bill 36.
  • the tab 40 may be oriented in any direction relative to the sleeve 14, such as transversely across the disc 30.
  • the check valve 10 may include two or more tabs 40, each of which may be substantially similarly to the tab 40 described with reference to Figures 5a to 5e.
  • the one or more tabs 40 may be affixed to the disc 30 or bill 36 by a connection member 42 instead of being integrally formed with the disc 30 or the bill 36.
  • the connection member 42 may be an elastomeric material vulcanized to the check valve 10.
  • the connection member 42 may be a rigid material fastened to the check valve 30 be fasteners, adhesives, or other means known in the art.
  • connection member 42 may be suitable for connection to the check valve 10 while the check valve 10 is installed in the conduit 12, such that one or more tabs 40 may be retrofitted to an existing check valve 10 without removing the check valve 10 from service.
  • FIG 9 another embodiment of the check valve is shown having a single tab 40 affixed to the disc 30 via a connection member 42, which may be substantially similar to the connection member 42 described with reference to Figures 8a and 8b.
  • the check valve 10 may include one or more hooks 70 for connecting to the cable 50 and providing similar functionality to the tabs 40 described with reference to Figures 5a-9.
  • the one or more hooks 70 may be made of metal or another rigid 5OA8961.DOCX 13 Attorney Docket No.: 01164-2307793 material to maintain a secure connection to the cable 50 when the cable 50 is under tension.
  • the one or more hooks 70 may be embedded or otherwise attached to at least one of the disc 30 and the bill 36 of the check valve 10 to facilitate manual opening of the check valve 10 by applying tension to the cable 50.
  • other structures may utilized for connection of the check valve 10 to the cable 50 such as fasteners, lugs, loops, eyebolts, and adhesives.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

Un clapet anti-retour comprend un manchon tubulaire ayant une région d'extrémité d'entrée de fluide amont conçue pour être fixée à un conduit d'effluent et une région de sortie de fluide aval. La région de sortie de fluide aval fournit un passage d'écoulement pour lesdits fluides. Le clapet anti-retour comprend en outre un disque fixé à au moins l'une parmi une paroi supérieure et une paire de parois latérales dudit manchon. Ledit disque ouvre ledit clapet en réponse à une pression différentielle positive à l'intérieur dudit clapet. Le clapet de non-retour comprend en outre une ou plusieurs languettes fixées à au moins l'un parmi ledit disque et ledit billet, chacune desdites une ou plusieurs languettes étant conçue pour être reliée à un câble pour ouvrir manuellement le disque.
PCT/US2023/034752 2022-10-07 2023-10-09 Clapet anti-retour ayant des languettes d'ouverture Ceased WO2024076782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263414223P 2022-10-07 2022-10-07
US63/414,223 2022-10-07

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WO2024076782A1 true WO2024076782A1 (fr) 2024-04-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5881772A (en) * 1998-01-05 1999-03-16 Chesebrough-Pond's Usa., Co. Division Of Conopco, Inc. Smiling duckbill valve
US5931197A (en) * 1997-09-22 1999-08-03 Red Valve Co., Inc. Asymmetrical check valve
EP1577450A1 (fr) * 2004-03-15 2005-09-21 Ab Sjöbo Bruk Piège à odeur
US20170065811A1 (en) * 2014-03-05 2017-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device for providing a constant amount of aerosol
US20180023724A1 (en) * 2016-07-21 2018-01-25 Red Valve Company, Inc. Elastomeric In-Line Tide Gate Valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5931197A (en) * 1997-09-22 1999-08-03 Red Valve Co., Inc. Asymmetrical check valve
US5881772A (en) * 1998-01-05 1999-03-16 Chesebrough-Pond's Usa., Co. Division Of Conopco, Inc. Smiling duckbill valve
EP1577450A1 (fr) * 2004-03-15 2005-09-21 Ab Sjöbo Bruk Piège à odeur
US20170065811A1 (en) * 2014-03-05 2017-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device for providing a constant amount of aerosol
US20180023724A1 (en) * 2016-07-21 2018-01-25 Red Valve Company, Inc. Elastomeric In-Line Tide Gate Valve

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