US20010003217A1 - Breakaway drain cover - Google Patents
Breakaway drain cover Download PDFInfo
- Publication number
- US20010003217A1 US20010003217A1 US09/417,156 US41715699A US2001003217A1 US 20010003217 A1 US20010003217 A1 US 20010003217A1 US 41715699 A US41715699 A US 41715699A US 2001003217 A1 US2001003217 A1 US 2001003217A1
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- US
- United States
- Prior art keywords
- drain
- drain cover
- pump
- spa
- switch
- 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.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/60—Components specifically designed for the therapeutic baths of groups A61H33/00
- A61H33/6068—Outlet from the bath
- A61H33/6073—Intake mouths for recirculation of fluid in whirlpool baths
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
- A61H2201/01—Constructive details
- A61H2201/0173—Means for preventing injuries
- A61H2201/0176—By stopping operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H33/00—Bathing devices for special therapeutic or hygienic purposes
- A61H33/005—Electrical circuits therefor
Abstract
A spa system which employs a removable drain cover. Removal of the drain cover will cause a proximity switch to turn off the circulation pump in the spa. In a preferred embodiment, the removable drain cover has a magnet attached to it and a magnetically actuable reed switch is attached to the drain body in proximity to the drain cover. Removal of the drain cover with the magnet attached will cause the reed switch to change state which opens a circuit controlling the operation of the spa pump thereby shutting down the spa circulation system. As a result, the spa circulation system cannot be operated without the drain cover in place. This reduces the likelihood of unwanted objects being drawn into the drain. Furthermore, should the spa user's hair become entangled in the drain cover or the drain pipe, the spa pump may be turned off by simply removing the drain cover thereby permitting the entangled user to be released.
Description
- The present invention relates to liquid circulation systems, and more particularly to a system and method for automatically turning off a spa circulation system in certain situations.
- Spas, also known as hot tubs, whirlpools, etc., utilize relatively powerful pump driven circulation systems to inject powerful streams of water into the spa. This water stream, often combined with air, is directed onto the user, thereby creating a pleasing, sometimes therapeutic effect. The circulation system providing such water streams draws water from the spa itself through a drain typically located at the bottom or wall of the spa. Because of the relatively high volume of water required to produce the desired pressure in the resulting water streams, (typically in the range of 50- 100 gallons per minute) water is drawn by the circulation system through the drain opening at a relatively high velocity.
- To ensure that foreign objects are not drawn into the drain, a drain cover is usually employed having small holes to permit only water to enter the circulation system. Operation of the spa without the drain cover in place could create a number of potential problems. For example, foreign objects brought into the circulation system could damage the pump or other components in the circulation system. Moreover, because of the relatively high velocity of the water drawn into the drain, there is a possibility of users of the spa having limbs or hair drawn into the drain.
- Nevertheless, it has been found that users of spas sometimes remove the drain covers for cleaning and may neglect to replace the cover and operate the spa without the cover in place. To prevent this from occurring, spas in the United States generally comply with the Consumer Product Services, Underwriter Laboratory (UL) or American National Standards Institute (ANSI) requirements that a spa drain cover be removable only with the use of tools. For example, the drain cover may be secured by one or more screws. It is felt that this requirement lessons the likelihood that a spa will be used without the drain cover in place. For example, with this requirement it is less likely that children playing in the spa would remove the drain cover during use.
- Yet even with the requirement that spa drain covers be secured in this manner, it is still possible for a user to fail to replace the drain cover and to operate the drain without the cover in place. This could result in the aforementioned problems. Furthermore, it has been found that even with the drain covers in place, it is unlikely but possible for a person's hair to be drawn into the drain. Once this occurs, the hair may be difficult to remove due to the relatively strong suction force in the drain opening, and also due to the possibility that they hair may become entangled in the drain cover openings. Once the person's hair is entangled in the drain cover, drain covers requiring tools to remove make the situation worse since the person will not normally have an opportunity to obtain a tool to remove the drain cover. Additionally, spa drain openings often employ an anti-vortex structure near the drain cover which provides an additional way for hair to become entangled.
- Thus while hazards still exist with drain covers that require tools to remove, it is generally felt (and in fact required) that drain covers be secured in this way because the risk of user entrapment is lower than it would be if drain covers were easily removed.
- A further problem which stems from the above discussed situation, is that the flow rate in spas is frequently limited (for example, to 50 gallons per minute) to thereby reduce the suction force in any effort to make spas safer. As a result of limited flow rates, the water pressure producing the water jets to provide recreational and therapeutic benefits is necessarily limited.
- Thus, it would be desirable to provide a spa which further reduces or eliminates the possibility of a person's hair becoming entrapped in the spa drain. It would also be desirable to provide a spa drain cover which reduces the possibility of hair entrapment in the spa drain. It would also be desirable to provide a spa which reduces such risks to the user whether the drain cover is in place or not. Furthermore, it would be desirable to provide a spa which can safely utilize a higher flow rate than is currently used.
- Pursuant to the present invention, a circulation system for a spa, swimming pool or jetted tub is provided which automatically shuts off in the event that drain cover is removed. In particular, the system includes a spa shell which contains a liquid and a circulation pathway which permits the liquid to flow from the spa shell at a drain outlet and back into the spa shell through an inlet. A pump is coupled to the circulation pathway which forces liquid through the circulation pathway. A drain cover which has a plurality of openings is removable and attached to the drain outlet in the spa. A switch is coupled to the drain cover and also to the pump for deactivating the pump upon removal of the drain cover. Thus, the pump will not operate without the drain cover in place. As a result, a removable drain cover may be utilized with the risk of operating the pump without the drain cover in place. Also, in the event that a person's hair is entangled in the drain cover, the person may be easily released by simply removing the drain cover and thereby shutting off the pump. This invention also permits the safe use of higher flow rates in spas then would otherwise be recommended.
- The various advantages of the present invention will become apparent to one skilled in the art by reading the following specifications and by reference to the following drawings in which:
- FIG. 1 is a diagrammatic representation of the spa in accordance with the present invention.
- FIG. 2 is a diagram of the proximity switch used in accordance with a preferred embodiment of the present invention.
- FIG. 3 is a bottom view of a drain cover in accordance with another embodiment of the present invention incorporating an anti-vortex device.
- Referring now to FIG. 1 there is shown a
spa 10 incorporating the breakaway drain cover of the present invention. Thespa 10 includes ashell 12 which is shown partially in cross section in FIG. 1. Theshell 12 will contain water and is preferably composed of molded fiberglass. Awater circulation system 14 provides for circulation of water from the interior of thespa shell 12 and back out into the spa creating the desired high pressure water jets. A conventional filtration system (not shown) is also integrated into the water circulation system. - In more detail, the
water circulation system 14 includes a drain comprising adrain cover 16, a drain wall fitting 18, adrain body 20, and areturn drain pipe 22 which transfers water from the interior of thespa shell 12 to apump 24.Pump 24 comprises a typical spa pump which is powered through an external source of electrical power received throughelectrical line 26.Pump 24 drives water from thedrain pipe 22 out to thewater return pipe 28. Thereturn pipe 28 then carries water to one ormore spa jets 30 which generates a high velocity water stream into thespa shell 12 interior.Spa jet 30 may compromise, for example, a spa jet which provides for an adjustable flow rate direction which also mixes an adjustable quantity of air with the water stream. Such a spa jet is described, for example, in U.S. patent application Ser. No. 08/147,171, entitled “Combination Adjustable Jet Value” which is assigned to Dimension One Spas of Oceanside, Calif. -
Drain wall fitting 18 is inserted into an opening (not shown) in thespa shell 12 and is threaded into thedrain body 20 by means ofthreads 32.Drain cover 16 is attached todrain wall fitting 18 by means of a snap fit so thatdrain cover 16 may be easily attached and removed by hand without the use of tools. For example, in the preferred embodiment this snap fit may be achieved by means ofdetent 34 which snaps into anotch 36 in thedrain wall fitting 18. Alternatively, a raised ring on the drain body engages with a tang on the drain cover. -
Drain cover 16 has a plurality ofholes 17 to permit water to flow through the drain cover and enter thedrain body 20.Drain cover 16 also includes amagnet 38 which is mounted onto apost 40 attached to thedrain cover 16 at its central axis.Magnet 38 is designed to interact withreed switch 42 which is mounted at the side of thedrain body 20. Reedswitch 42 is connected by means ofwires 44 to acontrol PC board 46.Control PC board 46 comprises a conventional spa control PC board such as will be familiar with those skilled in the art.Control PC board 46 has an output connected towires 48 are connected to thepump 24.Reed switch 42 is a normally open switch which manipulates an I/O pin onPC Board 46 in order to connect or disconnect the twowires 48 to enable and disable the operation of thepump 24. In the preferred embodiment, thereed switch 42 controls an interlock protection relay (not shown) in thecontrol PC board 46. In this way, when drain cover 16 is attached to the drain wall fitting 18,magnets 38 cause thereed switch 42 to close thereby completing a circuit for thepump 24 permitting the pump to operate. - Further details of the operation of the
reed switch 42 are shown in FIG. 2. Reed switch 42 composes a pair ofreed arms Reed 50 comprises a flexible strip of conductive material mounted in such a way as to permit up and down motion in the orientation shown in FIG. 2.Reed 52 is likewise conductive of a strip of conductive material but is mounted in a fixed manner to thereed switch 42. Whenmagnet 38 is brought within proximity ofreed switch 42 the magnetic force of attraction pullsreed 50 towardmagnet 32 thereby causing it to make contact withreed 52. The exact proximity required bymagnet 38 to movereed 50 to make contact withreed 52, will depend on the reed switch used and the strength of themagnet 38. For example,reed switch 42 may comprise a reed switch model number MDSR-4-17-23 available from Hamlin Corporation of Lake Mills, Wisc. - It will be appreciated that a variety of types of switches or sensors may be used in other embodiments of the present invention besides
reed switch 42. For example, these include but are not limited to: proximity switches, mechanical switches, optical switches, and other types of switches or sensors capable of detection of the removal of the drain cover. - Referring now to FIG. 3 and additional embodiment of a drain cover in accordance with the present invention is shown.
Drain cover 54 in this embodiment includes ananti-vortex device 56.Drain cover 54 includes a series ofholes 60 to permit water to flow through. Also, thedetent 34 is shown indrain cover 54. It will be appreciated by those skilled in the art that in anti-vortex device prevents the creation of vortex in the water as it is drawn into thedrain body 20. It does this by means of a series offins 58 which resist circular motion of water which creates a vortex. It will be appreciated that anti-vortex devices in spas are frequently affixed to thedrain body 20. However, this location of the anti-vortex device raises the possibility of entanglement of hair even in the case where thedrain cover 16 has been removed and the pump is shut off. Thus, it is much preferable in accordance with this invention to have theanti-vortex device 56 attached to thedrain cover 54 to prevent this from occurring. In this embodiment, should a person's hair become entangled in theanti-vortex device 56, the drain cover containing the anti-vortex device is easily removed from the water along with the entangled hair. - As a result, pump24 in
spa 10 will only be operational when thedrain cover 16 is in place. This reduces the likelihood that objects or a person's hair will become drawn into thedrain body 20 since the pump cannot operate without the drain cover on. When the drain cover is on, and the pump is operational, there is still a possibility of a person's hair being drawn into the drain body through openings in the drain cover. However, should this occur, the easily removable drain cover can be removed thereby disabling the pump and allowing the person to be released. Thus, two of the features of the present invention reduce the possibility of a person becoming entrapped by hair drawn into the drain body. First, simply by virtue of having the drain cover easily removable, hair which may be entangled in the drain cover can be freed by removing the drain cover itself. Second, the process of removing the drain cover will free hair which may be drawn into the drain pipe with a significant amount of force. For example, it is conceivable that in some situations, simply removing the drain cover would not permit the hair to become free because of the suction created in the drain pipe by thepump 24. Thus, Applicant's invention shuts down the pump and provides a second safety measure to permit the user to escape. - It will be appreciated that the
water circulation system 14 utilizing the breakaway drain cover of the present invention may be utilized in a variety of applications beside spas, such as swimming pools and jetted tubs. Also, thecirculation system 14 may be built into a new spa or may be added to an existing spa by means of retrofit application. - Those skilled in the art can appreciate that other advantages can be obtained from the use of this invention and that modification may be made without departing from the true spirit of the invention after studying the specifications, drawings and following claims.
Claims (16)
1. A liquid circulation system coupled to a liquid containing vessel comprising:
a vessel shell containing a liquid, said vessel shell including outlet and inlet openings;
a circulation pathway for permitting said liquid to flow from said outlet opening and back into said inlet opening;
a pump coupled to said circulation pathway, said pump forcing the liquid through said circulation pathway; drain cover having a plurality of openings, removably attached to said inlet opening; and
a switch coupled to said drain cover and also to said pump for deactivating said pump upon the removal of said drain cover, whereby said pump will not operate without said drain cover in place.
2. The system of wherein said switch comprises a magnet attached to said drain cover and a magnetically actuated switch member disposed as said drain outlet within proximity to said magnet, wherein the removal of said drain cover results of movement of said switch member, thereby changing the state of said switch means to deactivate said pump.
claim 1
3. The system of further comprising a control unit coupled between said switch and said pump for sensing a change in the state of said switch upon the removal of said drain cover and transmitting a signal to said pump causing the deactivation of said pump.
claim 1
4. The system of wherein said switch comprises a reed switch.
claim 2
5. The system of wherein said drain cover physically engages with said drain inlet in a manner which removably secures the drain cover to the drain inlet but which permits the removal of said drain cover by hand without tools.
claim 1
6. The system of wherein said drain cover further comprises a detent which engages with a groove in said drain inlet to removably secure the drain cover to the vessel shell.
claim 5
7. The system of wherein said drain cover further comprises an anti-vortex structure.
claim 1
8. The system of wherein said vessel is a spa.
claim 1
9. The system of wherein said vessel is a swimming pool.
claim 1
10. In a spa having a spa shell containing a liquid, a pump and circulation pathway for pumping said liquid from said spa shell at an outlet opening and back into said spa shell through an inlet opening, the improvement comprising:
a drain cover means removable attached to said drain outlet;
a switch attached to said drain outlet for sensing when said drain cover is removed, said switch means being coupled to said pump so as to activate said pump when said drain cover is attached to said outlet and deactivate said pump when said drain cover is not attached to said drain outlet.
11. The spa of wherein said switch comprises a magnet attached to said drain cover and a magnetically actuated switch member disposed at said drain outlet within proximity to said magnet, wherein the removal of said drain cover results of movement of said switch member, thereby changing the state of said switch means to deactivate said pump.
claim 10
12. The spa of further comprising a control unit coupled between said switch and said pump for sensing a change in the state of said switch upon the removal of said drain cover and transmitting a signal to said pump causing the deactivation of pump.
claim 10
13. The spa of wherein said magnet comprises a reed switch.
claim 11
14. The spa of wherein said drain cover physically engages with said drain inlet in a manner which removably secures the drain cover to the drain inlet but which permits the removal of said drain cover by hand without tools.
claim 10
15. The spa of wherein said cover further comprises a detent which engages with a groove in said drain inlet to removably secure the drain cover to the spa shell inlet.
claim 14
16. A method for disabling a pump driven liquid circulation system in a liquid containing vessel, said method comprising the steps of:
locating a removable drain cover in said vessel;
locating a switch on said drain cover on said vessel;
actuating said switch upon the removal of said drain cover from said vessel; and
disabling the circulation system pump upon said actuation of said switch, whereby said spa circulation system is disabled whenever the drain cover is removed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/417,156 US6269493B2 (en) | 1999-10-12 | 1999-10-12 | Breakaway drain cover |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US09/417,156 US6269493B2 (en) | 1999-10-12 | 1999-10-12 | Breakaway drain cover |
Publications (2)
Publication Number | Publication Date |
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US20010003217A1 true US20010003217A1 (en) | 2001-06-14 |
US6269493B2 US6269493B2 (en) | 2001-08-07 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/417,156 Expired - Fee Related US6269493B2 (en) | 1999-10-12 | 1999-10-12 | Breakaway drain cover |
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US (1) | US6269493B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003013416A3 (en) * | 2001-08-02 | 2003-11-27 | Hoesch Metall & Kunststoffwerk | Whirlpool bath with safety drain |
US6760931B1 (en) | 2002-08-02 | 2004-07-13 | Roy W. Mattson, Jr. | Non-electric sanitation water vessel system |
US20050044619A1 (en) * | 2002-08-02 | 2005-03-03 | Mattson Roy W. | Sanitation suction device |
US20050091740A1 (en) * | 2002-08-02 | 2005-05-05 | Mattson Roy W.Jr. | Retrofit suction sanitation safety cover |
US6944893B1 (en) | 2003-07-22 | 2005-09-20 | Roy W. Mattson, Jr. | Combination sanitation suction device and high flow antimicrobial dispenser |
US7384544B2 (en) | 2005-08-30 | 2008-06-10 | Meincke Jonathan E | Canister filter for swimming pool |
USD897503S1 (en) * | 2019-01-11 | 2020-09-29 | Watts Regulator Co. | Drain cover |
CN114876019A (en) * | 2022-04-11 | 2022-08-09 | 厦门市欧立通电子科技开发有限公司 | Intelligent closestool's wiper mechanism, intelligent closestool |
Families Citing this family (11)
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US6775863B2 (en) | 2002-10-23 | 2004-08-17 | Dimension One Spas | Spa or pool switch |
US6817043B2 (en) | 2002-11-15 | 2004-11-16 | Leif Alexander Zars | Safety swimming pool replacement drain cover apparatus and method |
US7146657B2 (en) * | 2004-03-22 | 2006-12-12 | Jahnke Mark G | Water equipment attachment apparatus |
US20060090257A1 (en) * | 2004-10-29 | 2006-05-04 | Randy Geller | Drain surrounding structure protective cosmetic cover |
US7931447B2 (en) * | 2006-06-29 | 2011-04-26 | Hayward Industries, Inc. | Drain safety and pump control device |
ES2805773T3 (en) | 2010-02-25 | 2021-02-15 | Hayward Ind Inc | Universal bracket for a variable speed pump drive user interface |
EP3620149B1 (en) | 2013-03-15 | 2021-10-06 | Hayward Industries, Inc. | Modular pool/spa control system |
US9752715B2 (en) | 2014-11-19 | 2017-09-05 | Duane Heaton | Decorative and magnetic cleanout cover |
US20170209338A1 (en) | 2016-01-22 | 2017-07-27 | Hayward Industries, Inc. | Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment |
US11720085B2 (en) | 2016-01-22 | 2023-08-08 | Hayward Industries, Inc. | Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment |
US10718337B2 (en) | 2016-09-22 | 2020-07-21 | Hayward Industries, Inc. | Self-priming dedicated water feature pump |
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Cited By (11)
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WO2003013416A3 (en) * | 2001-08-02 | 2003-11-27 | Hoesch Metall & Kunststoffwerk | Whirlpool bath with safety drain |
US6760931B1 (en) | 2002-08-02 | 2004-07-13 | Roy W. Mattson, Jr. | Non-electric sanitation water vessel system |
US20040168248A1 (en) * | 2002-08-02 | 2004-09-02 | Mattson Roy W. | Antimicrobial chemical dispensing faceplate |
US20050044619A1 (en) * | 2002-08-02 | 2005-03-03 | Mattson Roy W. | Sanitation suction device |
US20050091740A1 (en) * | 2002-08-02 | 2005-05-05 | Mattson Roy W.Jr. | Retrofit suction sanitation safety cover |
US7203977B2 (en) | 2002-08-02 | 2007-04-17 | Roy W. Mattson, Jr. | Fill and drain jetted hydromassage antimicrobial water vessel |
US7346938B2 (en) | 2002-08-02 | 2008-03-25 | Roy W. Mattson, Jr. | Retrofit suction sanitation safety cover |
US6944893B1 (en) | 2003-07-22 | 2005-09-20 | Roy W. Mattson, Jr. | Combination sanitation suction device and high flow antimicrobial dispenser |
US7384544B2 (en) | 2005-08-30 | 2008-06-10 | Meincke Jonathan E | Canister filter for swimming pool |
USD897503S1 (en) * | 2019-01-11 | 2020-09-29 | Watts Regulator Co. | Drain cover |
CN114876019A (en) * | 2022-04-11 | 2022-08-09 | 厦门市欧立通电子科技开发有限公司 | Intelligent closestool's wiper mechanism, intelligent closestool |
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