WO2010059163A1 - Système réglable de soupape de sécurité casse-vide pour piscines et spas - Google Patents

Système réglable de soupape de sécurité casse-vide pour piscines et spas Download PDF

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Publication number
WO2010059163A1
WO2010059163A1 PCT/US2008/084416 US2008084416W WO2010059163A1 WO 2010059163 A1 WO2010059163 A1 WO 2010059163A1 US 2008084416 W US2008084416 W US 2008084416W WO 2010059163 A1 WO2010059163 A1 WO 2010059163A1
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WO
WIPO (PCT)
Prior art keywords
pump
inner chamber
housing
shell
sealing element
Prior art date
Application number
PCT/US2008/084416
Other languages
English (en)
Inventor
Hassan Hamza
Original Assignee
Hassan Hamza
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 Hassan Hamza filed Critical Hassan Hamza
Publication of WO2010059163A1 publication Critical patent/WO2010059163A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]

Definitions

  • the present invention generally relates to vacuum relief valves. More particularly, the present invention relates to an adjustable vacuum relief safety valve system for use in swimming pools, spas and the like which causes the pump to lose its prime and be shut off if a pre-determined vacuum level is reached in the pump system, such as when an object obstructs the pool's drain.
  • a pre-determined vacuum level is reached in the pump system, such as when an object obstructs the pool's drain.
  • Pools of various types are known to have one or more suction inlets where pool water is sucked along the line via a pump to filtration, aeration, chemical treatment and other type of equipment prior to being returned to the pool via one or more return outlets.
  • suction inlets are positioned in the bottom or lower region of the pool.
  • Very recently developed pool systems known as in-floor cleaning systems, have one or more suction inlets which suck pool water therethrough and any debris of pollutants entrained therein are cleaned from the water by being pumped through a filtration and/or treatment station.
  • a high rate of water flow must be achieved in order to maintain an acceptable level of cleanliness. Consequently, a high capacity pump must be employed to draw the water from the pool, with a relatively larger pump generally being required as the size of the pool increases.
  • valves require that the pipe be cut so that the safety valve device can be inserted therein. Cutting these lines increases the opportunity for air leakage in the suction side. Moreover, such installation typically requires professionals having the appropriate tools and ability to install such safety devices. A problem with all such "in-line" systems is that they are typically not close to the pump. The closer one gets to the pump, the better the safety device responds to emergencies.
  • the safety valve should be capable of being attached directly to the pump.
  • the safety valve system should also be simple enough in design so as to be manufactured inexpensively and installed by the pool owner.
  • the safety valve system should also be capable of being used in existing pools as a retrofit and adjustable to the pump of the existing pool.
  • the present invention fulfills these needs and provides other related advantages.
  • human-occupiable pool means any residential or commercial swimming pool, wading pool, hot tub, spa, Jacuzzi or the like.
  • human-occupiable pools have a water circulation system including an intake line, such as from drains from the pool, and a water output line fluidly connected to a pump.
  • the pump serves to circulate the water, such as through a filtration system.
  • the adjustable vacuum relief safety valve system of the present invention comprises a housing comprised of a first shell portion and a second shell portion which cooperatively define an inner chamber.
  • the first shell portion of the housing has an aperture in fluid communication with the pump and the inner chamber of the housing.
  • An air inlet aperture is formed in the second shell of the housing and open to ambient air.
  • the housing is directly attached to the pump.
  • the housing is threadedly attached to a drainage port of the pump.
  • a sealing element is disposed within the housing inner chamber.
  • the sealing element includes at least one leg biased against a wall of the inner chamber.
  • a spring may be used to bias the at least one leg against the wall of the inner chamber.
  • a spring is disposed within the inner chamber and adapted to bias the sealing element against the air inlet aperture of the second shell so as to prevent ambient air from entering the inner chamber and into the pump during normal pressure conditions.
  • the spring can be compressed to permit the sealing element to be pushed away from the air inlet aperture of the second shell and permit the flow of ambient air into the inner chamber and into the pump, such that the pump loses its prime during elevated negative pressure operating conditions, such as when a drain of the human-occupiable pool is obstructed.
  • the first shell and the second shell of the housing are connected so as to be adjustably moved toward and away from one another so as to alter the compression of the spring and adjust for pump characteristics.
  • the first shell and the second shell are threadedly attached to one another.
  • a visually readable pressure gauge is operably connected to the housing so as to read a pressure within the inner chamber. This may be done by connecting the pressure gauge to a port of the housing in fluid communication with the inner chamber of the housing. The first and second shells of the housing are adjustably connected to one another until a reading from the pressure gauge is generally constant. This indicates that the vacuum release safety valve system has been adjusted properly to that particular pump to reflect its normal operating pressure conditions.
  • the system includes an electronic circuit, including a switch actuatable by movement of the sealing element, wherein actuation of the switch activates the electronic circuit to shut off power to the pump.
  • the switch includes a depressable member engageable with a portion or extension of the sealing element so as to actuate the switch.
  • the electronic circuit preferably includes a timer circuit configured to temporarily shut off power to the pump, and after a predetermined period of time restore power to the pump.
  • the electronic circuit may also include delay circuitry configured to delay shutting off power to the pump during a predetermined pump start-up period.
  • FIGURE 1 is a side perspective view of an adjustable vacuum relief safety valve embodying the present invention, with first and second shells of the housing being completely closed towards one another;
  • FIGURE 2 is a side perspective view of the adjustable vacuum relief safety valve of FIG. 1 , illustrating the first and second shells moved away from one another, in accordance with the present invention
  • FIGURE 3 is a rear and side exploded perspective view of the vacuum relief safety system of FIG. 1 , illustrating various component parts thereof;
  • FIGURE 4 is a front and side exploded perspective view of the vacuum relief safety device of FIG. 1 ;
  • FIGURE 5 is a front elevational view of the vacuum relief safety valve system of the present invention.
  • FIGURE 6 is a partially sectioned view of the vacuum relief safety valve system of FIG. 5;
  • FIGURE 7 is a side sectional view of the vacuum relief safety system, illustrating a sealing element thereof in a closed position;
  • FIGURE 8 is a sectioned view similar to FIG. 7, but illustrating the sealing element in an open position
  • FIGURE 9 is a side perspective view of another embodiment of the vacuum relief safety valve of the present invention.
  • FIGURE 1 0 is a side perspective view of the vacuum relief safety valve of FIG. 9, with the shells of the housing being adjusted away from one another, in accordance with the present invention;
  • FIGURE 1 1 is a rear and side exploded perspective view, illustrating various components of the vacuum relief safety valve
  • FIGURE 1 2 is a front and side exploded perspective view of the vacuum relief safety valve
  • FIGURE 1 3 is a partial cross-sectional view taken generally along line
  • FIG. 9 1 3-1 3 of FIG. 9, illustrating the device of the present invention during normal pump operating conditions
  • FIGURE 1 4 is a cross-sectional view taken generally along line 1 4-1 4, illustrating arrangement of inner components of the device during normal pump operating conditions;
  • FIGURE 1 5 is a partially cross-sectional view similar to FIG. 1 3, but with the pump operating under abnormal, and elevated negative pressure conditions;
  • FIGURE 1 6 is a cross-sectional view taken generally along line 1 6-1 6 of FIG. 1 5, illustrating the internal components in an elevated negative pressure condition, including actuation of a switch thereof;
  • FIGURE 1 7 is a partially sectioned view of a pump having a vacuum relief safety valve system embodying the present invention attached to a drainage port thereof;
  • FIGURE 1 8 is a partially sectioned view of a pump having the vacuum relief safety valve system of the present invention attached directly to another portion of the pump, in accordance with the present invention;
  • FIGURE 1 9 is a diagrammatic view of a pump having the vacuum relief safety valve system of the present invention attached to a drainage port thereof, and operably connected to a control circuit, in accordance with the present invention;
  • FIGURE 20 is a diagrammatic view of an electric circuit used in accordance with the present invention.
  • FIGURE 21 is a diagrammatic view of the steps taken in accordance with one mode of the present invention.
  • the present invention resides in an adjustable vacuum relief safety valve system, generally referred to by the reference number 1 0, for a human-occupiable pool.
  • human occupiable pool includes residential and commercial swimming pools, wading pools, spas, Jacuzzis, hot tubs and the like.
  • Such human-occupiable pools have a water circulation system which includes a water intake line and a water output line fluidly interconnected with a pump.
  • the present invention under abnormal elevated negative pressure conditions, introduces ambient air into the pump such that the pump loses its prime. In one embodiment, the invention also at least temporarily shuts off power to the pump.
  • the safety valve system 10 includes a housing comprised of a first shell 1 2 and a second shell 14, which are adjustably attached to one another.
  • the first and second shells 1 2 and 14 of the housing are configured to be connected to one another in an adjustable manner such that the axial distance therebetween can be altered in a selective manner.
  • the first shell includes interior threads 1 6, as illustrated in FIG. 4, and the second shell includes a portion having mating exterior threads 27, as illustrated in FIGS. 2 and 3.
  • the second shell includes hand grip bumps 20, or the like, to facilitate the manual screwing and unscrewing of the second shell 14 to the first shell 1 2.
  • the second shell 1 4 is adjusted appropriately, as will be more fully described herein, one or more bolts 1 8 are inserted through a slot or aperture 1 9 of the second shell and into a corresponding tie bolt receiving threaded aperture 33.
  • a series of semi-circular slots 1 9 are formed within a circumferential edge of the second shell such that the bolt 1 8 can be aligned with the receiving threaded aperture 33 of the first shell.
  • the first and second shells 1 2 and 1 4 cooperatively form an inner chamber 32 therebetween.
  • the size of the inner chamber is adjusted per the adjustable connection of the first and second shells 1 2 and 14, as described above.
  • the inner chamber 32 is in fluid communication with a pump 79 of the circulation system.
  • the first shell 1 2 includes an exteriorly threaded shank 26 having an aperture 30 which provides fluid communication between the inner chamber 32 and the pump 79.
  • the relief valve system 1 0 of the present invention is preferably attached to a drainage plug outlet 1 68 of the pump.
  • an extension conduit 1 67 interconnecting the drain plug port 1 68 and the relief safety valve system 10.
  • the drain port 1 68 is shown with its plug 1 70 inserted therein, as is typically the case without the invention.
  • the vacuum relief safety valve system 10 has been directly attached to another portion of the pump 1 60. This may be by threaded interconnection with the exterior threads 28 of the first shell extension 26, or by other means, such as the use of adhesives or the like.
  • the vacuum relief safety valve system 10 be directly attached to the pump so that ambient air can be introduced into the pump as quickly as possible such that the pump loses its prime and the obstruction can be removed from the drain of the pool.
  • an O-ring 34 or the like is typically provided between the back plate of the first shell 1 2 and surrounding the extension 26 so as to be disposed between the first shell 1 2 and the adjoining pump face.
  • one or more apertures 22 and 23 are formed in the second shell 14 of the housing which are in fluid communication with ambient air. Absent any obstruction, ambient air is allowed to flow through the one or more holes 22 and 23 of the second shell of the housing 14, through the inner chamber 32, and through the outlet aperture 30 of the first shell 1 2 and into the pump 1 60.
  • a plurality of apertures 23 are formed which are relatively small in size so as to prevent insects or other debris from entering therein. It will also be understood that a mesh material or the like can be used to prevent such material from entering into the system 10.
  • the apertures 22 and 23 are formed in the front face 24 of the second shell 1 4, as illustrated in FIG. 4.
  • a sealing element 36 is disposed within the housing and biased upwardly against the upper end wall 24 of the second shell 1 4 so as to seal the air inlet aperture 22.
  • O-ring 37 engages radially to form a seal between sealing element 36 and the inside of the housing at ledge 39 to form a piston like mechanism that creates pneumatic compensation for any existing pool set-up.
  • this dual sealing will work as a primary air and fluid tight seal.
  • a gasket such as the illustrated rubber O-ring 38, may be disposed between the housing and the sealing element 36 so as to create a back-up air and fluid-tight seal.
  • the sealing element 36 is of a disc-figuration, as illustrated in FIGS.
  • An inner based surface of the first shell 1 2 includes a seat 46 which supports a spring 48 thereon.
  • the spring is a compression spring so as to extend outwardly away from the base plate 1 2 and contact the sealing element 36 so as to bias it into engagement with the upper wall 24 of the second shell 14 so as to seal the air inlet aperture 22.
  • the seat 46 preferably includes a cylindrical guide 50 which extends into the spring 48 and properly positions the spring 48.
  • the seat 46 preferably includes one or more channels 52, as will be more fully described herein.
  • the inner wall of the housing typically also includes at least one depression 53, typically in the form of elongated flutes or channels, which permit air to pass through the housing around the sealing element 36 when the sealing element 36 is moved into the inner chamber, as illustrated in FIG. 8.
  • the sealing element 36 is shown with at least a portion, typically the end, of the legs 44 in engagement with the surface of the inner wall 56 of the housing.
  • the flexed legs 44 serve as a guide for the sealing element 36.
  • the legs 44 serve to delay the closure of the sealing element 36, or can be used to create a situation where a manual resetting is required.
  • a visually readable pressure gauge 1 7 is operably connected to the housing so as to read a pressure within the inner chamber 32.
  • the pressure gauge 1 7 is connected to a port 54 which extends through the first shell and into the inner chamber.
  • a pressure gauge 1 7 illustrating a rotatable dial is illustrated, although it will be appreciated that other pressure gauges, such as an electronic pressure gauge, could be used.
  • the vacuum relief safety valve system 10 of the present invention is adjustable so as to accommodate the different characteristics of pumps, such as the difference between different types of pumps, the power of the pump, etc. This is accomplished by attaching the system 10 to the pump of the pool water circulation system, and adjusting the second shell, either by rotating the second shell clockwise or counterclockwise so as to tighten or loosen the second shell to the first shell, and thus adjust the axial distance therebetween, and compress or decompress the spring and the sealing element until the system 1 0 is adjusted for the normal operating condition of the pump that it is being attached to. This can be easily visually seen with the pressure gauge.
  • the system 10 needs to be adjusted by rotating the second shell 1 4 until a generally constant reading is achieved.
  • the installer will know that the system 10 has been properly adjusted for the characteristics, such as horsepower, of that particular pool pump.
  • the bolts 1 8 can then be used to lock the first and second shells 1 2 and 14 in that position. This will prevent tampering or inadvertent adjustment of the system 10.
  • adjustability is highly desirable as the same system 10 can be used in association with a variety of different pumps.
  • the sealing element 36 and legs 44 can be comprised of a resilient material, such as nylon, causing the legs 44 to be biased outwardly against the housing inner wall.
  • a resilient material such as nylon
  • Teflon Other materials, such as Teflon, enable the sealing element 36 to be opened and closed numerous times, such as one hundred times or more.
  • a spring such as the illustrated flat spring 63, is disposed within the legs 44, causing them to be biased outwardly against the housing wall.
  • the legs 44 serve not only as a guide for the sealing element 36, but also serve to slow the closing of the sealing element 36.
  • the flush end of the second shell 58 can form a ledge 58 which can be engaged by an end 59 of the legs such that the legs lock the sealing element 36 in place if the sealing element 36 is pushed sufficiently far into the inner chamber of the housing.
  • This is desirable in that if the child or obstruction is lifted away from the drain port of the pool, the pump may regain its prime quickly, causing the sealing element 36 to close quite rapidly. Of course, this can cause the obstruction to be sucked back onto the drain port of the pool.
  • a pump 1 60 is shown with a water intake 1 64 and a water outlet 1 62.
  • Some pumps may include what is referred to as a "pot" 1 66.
  • the system 10 of the present invention is typically directly connected to the pump 1 60, such as at the pot 1 66, water inlet 1 64, or more preferably at the winterizing drain plug aperture 1 68.
  • An advantage of the safety valve system 1 0 of the present invention being placed at the winterizing drain port 1 68 is that the safety valve 1 0 serves as a discharge or drainage port for winterizing and the like, as well as a vacuum relief safety valve.
  • drain plug 1 70 is threadedly received within the drain port 1 68, such that when the pump is not going to be used for prolonged periods of time, such as when cold weather is imminent, the drain plug 1 70 is removed such that the water within the pump 1 60 drains therefrom.
  • the safety valve device 1 0 could be unthreaded and removed, causing the water within the pump to flow out of the pump.
  • the safety device 10 could have the sealing element 36 pushed inwardly therein until it is locked into place, allowing the water to drain therefrom.
  • the safety valve system 1 0 of the present invention can be attached to the pump 1 60 by other means, such as a hole drilled into the inlet port or in the pot, which may or may not be by threaded engagement. In such a case, the drain plug 1 70 would be inserted into the drain aperture 1 68 in normal fashion.
  • the present invention incorporates an electric switch assembly 70 having a depressable member 71 such that when the depressable member 71 is depressed, the switch is activated or changed from an open to a closed state such that electricity can flow through wires 72 to an electric circuit so as to shut off power to the pump.
  • the sealing element 36 includes a projection or plunger 66 having an enlarged end forming one or more ledges 69.
  • the depressable member 71 of switch 70 is positioned such that the plunger ledge 69 and the depressable member 71 are in alignment with one another.
  • the sealing element 36 Normally, the sealing element 36, and thus the plunger 66, is biased upwardly or outwardly such that the ledge 69 and the depressable member 71 are not in contact with one another, as illustrated in FIG. 1 4.
  • the plunger 66 comes into contact with the depressable switch member 71 , as illustrated in FIG. 1 6.
  • spring 48 As illustrated in FIG. 1 6, when the sealing element 36 is moved inwardly into the housing, spring 48 is compressed and the air inlets 22 and 23 open such that air can flow therethrough, around sealing element 36, into flutes or internal channels 53, and through air outlet 30 and into the pump such that the pump loses its prime, as described above.
  • the plunger 66 is moved downwardly and into contact with the depressable member 71 of switch 70.
  • switch 70 is secured to the housing via bolts 67 or the like.
  • depression of the switch mover 71 provides power to an electric circuit which shuts off power to the pump.
  • a cover cap 60 is provided.
  • the second shell includes structure to house the switch 70 and to accommodate the attachment of the cover cap 60, such as by insertion of a pin, screw, or the like through aperture 65.
  • Wires 72 extend from the switch 70 to the electronic circuit, as will be more fully described herein.
  • the plunger 66 is threadedly attached to an extension of the sealing element 36, such as by means of jam nut 73. This enables the distance between the plunger, and particularly ledge 69 and the depressable member 71 of switch 70 to be adjusted as needed.
  • the safety valve system 10 incorporating the electric switch is shown attached to the drainage port 1 68 of the pump 1 60.
  • the drainage port 1 68 is formed in a pot 1 66 having a removable lid, as is the case with certain pool pumps.
  • Electric leads 72 extend to a control box 90 having a door 92. Leads 93 may extend directly to the pump 1 60 for automatically turning the pump on or off in a permanent manner which can then later be reset.
  • the electric circuit includes a time relay 74, a transformer, a timer 78 and a switch 77, which is normally closed. Lead wire 79 from the electric circuit of the box 90 can then be used to power the pump.
  • the electric circuit within the box 90 or the pump motor serves to at least temporarily shut off power to the pump 1 60 when an excessive negative pressure within the pump or water circulation system is encountered.
  • FIG. 20 an illustrative wiring diagram consisting of two electrical circuits, namely, a high voltage alternating current circuit 68 and a low voltage direct current circuit 76.
  • the high voltage circuit 68 includes a normally closed switch 77, a time delay relay 78 and the pump 79.
  • the low voltage circuit 76 includes a time delay relay 74, a low voltage direct current output transformer/power supply 75, switch 70 and relay 73.
  • switch assembly 70 is actuated from its biased open circuit position to a closed circuit position, or is otherwise actuated, relay 73 is energized, causing normally closed switch 77 to open and turn the pump off.
  • another time delay relay 78 is used to postpone the pump restart, such as a five minute delay, after an entrapment to allow for enough time to free the impediment while also automatically supplying power to the pump again so as to avoid the need to manually reset the system.
  • Time delay relay 78 is energized 1 26 causing the start up of pump 79 to be delayed for a predetermined time, typically five minutes. After the five minute delay 1 28, the pump will start on 1 30, and run on the normal filtration cycle using typical power supply such as 1 1 0 or 220 alternating current voltage or 3-phase power supply. After this delay, relay 74 is energized 1 1 2. This relay serves to delay the powering of transformer 75 for a predetermined time, such as five seconds 1 1 4. Thus, time delay relay 74 acts as a surge-ignoring device when the pump is initially powered on. It is not uncommon when pumps are powered on initially that a high vacuum level occurs.
  • relay 74 is energized and delays the providing of power to the rest of the circuit for at least several seconds.
  • the pump starts and runs on the normal filtration cycle using the typical power supply, such as a 1 10 or 220 alternating current voltage or 3 PH power supply.
  • the transformer 75 is energized 1 1 6 as the 1 2 volts to 28 volts of direct current is output to transformer 75.
  • the pump remains on until there is an entrapment 1 1 8, determined when the switch 70 is closed from its normally open position 1 20.
  • a time delay relay 78 is energized 1 26 resulting in a delay of a predetermined amount of time, such as five minutes 1 28, before the power to the pump is restored and the pump is powered on 1 30 again automatically.
  • a predetermined amount of time such as five minutes 1 28, before the power to the pump is restored and the pump is powered on 1 30 again automatically.
  • the pump could be required to be manually reset and powered on. However, it is believed that the delay and automatic powering of the pump is preferable.
  • the five minute delay is used to postpone the pump restart immediately after an entrapment to allow for enough time to free the impediment.
  • the present invention also serves as a surge suppressor.
  • the surge suppressor function is achieved by venting off the sudden vacuum rise while the sealing element 36 is momentarily depressed.
  • the valve 10 protects the pump filtration equipment against shocks and vibrations during pump start-ups resulting in reduced maintenance cost, less down time and longer equipment life.
  • the electric circuit 76 also accounts for such surges by incorporating relay 74 so as to delay the supply of electricity to the remainder of the circuit for at least a few seconds, as described above, so that the pump is not automatically shut off within the first few seconds of operation when surges typically occur.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne un système réglable de soupape de sécurité casse-vide comprenant une enveloppe comportant une première coque et une deuxième coque qui forment ensemble une chambre interne en communication fluidique avec la pompe d'un système de circulation de piscine. Un élément d'étanchéité dans l'enveloppe est placé par défaut contre une ouverture d'entrée d'air de l'enveloppe grâce à un ressort afin d'isoler de l'air ambiant la chambre interne de l'enveloppe. Pour s'adapter à différentes pompes, la première coque et la deuxième coque sont connectées l'une à l'autre de façon que la compression du ressort puisse être modifiée selon les caractéristiques de la pompe. Lors de conditions de fonctionnement avec une dépression importante, l'élément d'étanchéité est poussé vers l'intérieur de la chambre interne, ce qui permet à l'air ambiant de s'écouler dans la chambre interne et la pompe, provoquant la perte rapide de l'amorçage de la pompe. Un circuit électronique peut être actionné par l'intermédiaire d'un commutateur pour couper l'alimentation de la pompe.
PCT/US2008/084416 2008-11-21 2008-11-21 Système réglable de soupape de sécurité casse-vide pour piscines et spas WO2010059163A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/275,896 US20090126806A1 (en) 2005-03-08 2008-11-21 Adjustable vacuum relief safety valve system for swimming pools and spas
US12/275,896 2008-11-21

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WO2010059163A1 true WO2010059163A1 (fr) 2010-05-27

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MX344350B (es) * 2010-12-08 2016-12-13 Pentair Water Pool & Spa Inc Válvula de descarga con vacío para sistema de liberación de vacío de seguridad.
US9874288B2 (en) * 2014-03-02 2018-01-23 Patrick Dean Cummins Oscillating pressure in a finite volume
BR112021013637A2 (pt) 2019-01-11 2021-09-14 Naegis Pharmaceuticals Inc. Inibidores da síntese de leucotrieno

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