US20120210505A1 - Rimless toilet with flush water distribution apparatus - Google Patents

Rimless toilet with flush water distribution apparatus Download PDF

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Publication number
US20120210505A1
US20120210505A1 US13/410,095 US201213410095A US2012210505A1 US 20120210505 A1 US20120210505 A1 US 20120210505A1 US 201213410095 A US201213410095 A US 201213410095A US 2012210505 A1 US2012210505 A1 US 2012210505A1
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United States
Prior art keywords
water
toilet
bowl
inlets
flushing
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Abandoned
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US13/410,095
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English (en)
Inventor
John Pearson
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Ideal Standard International BVBA
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Ideal Standard International BVBA
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Assigned to IDEAL STANDARD INTERNATIONAL BVBA reassignment IDEAL STANDARD INTERNATIONAL BVBA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PEARSON, JOHN
Publication of US20120210505A1 publication Critical patent/US20120210505A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D11/00—Other component parts of water-closets, e.g. noise-reducing means in the flushing system, flushing pipes mounted in the bowl, seals for the bowl outlet, devices preventing overflow of the bowl contents; devices forming a water seal in the bowl after flushing, devices eliminating obstructions in the bowl outlet or preventing backflow of water and excrements from the waterpipe
    • E03D11/02—Water-closet bowls ; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D2201/00—Details and methods of use for water closets and urinals not otherwise provided for
    • E03D2201/40—Devices for distribution of flush water inside the bowl

Definitions

  • the present invention relates to a toilet and specifically to a rimless toilet.
  • FIG. 1 An example of one conventional toilet is shown in FIG. 1 , in cross-section.
  • a conventional toilet typically comprises a toilet bowl or pan (reference A) and a toilet rim (reference B) extending around the top of the bowl.
  • On flushing of the toilet water is directed from an inlet pipe into the back of the bowl.
  • the majority of the water entering the toilet is directed in a generally vertical direction down the rear wall and towards the bottom of the bowl where the water enters the waste pipe or U-bend (as illustrated by the arrow in FIG. 1 ).
  • a toilet comprising a rimless toilet bowl and a pair of water inlets arranged in use to direct substantially all of the water flowing into the toilet in substantially horizontally opposing directions around the inner surface of the toilet bowl.
  • substantially all of the flushing water received into the toilet is only directed in opposing and substantially horizontal directions by means of the two water inlets i.e. water is not directed from the inlet directly down and into the bowl as is the case in conventional toilets.
  • substantially all of the water received in the bowl is directed towards the U-bend to create the necessary flushing action as illustrated by the arrows in FIG. 1 .
  • Directing all of the water horizontally creates a flushing plume at an opposing side of the toilet bowl which cleans the inside surfaces of the toilet bowl and creates the necessary flushing plume.
  • the use of a toilet without any kind of rim minimises the regions around the bowl at which germs, bacteria and matter may build-up and furthermore maximises the visibility of the inside of the bowl allowing easy and convenient inspection.
  • rimless is intended to refer herein to a toilet bowl which is void of an overhanging surface extending around the upper surface of the rim. By removing the overhanging surface the visibility of the inside of the toilet bowl is substantially improved. In addition access to the bowl is improved for cleaning.
  • Water may be introduced into the bowl by means of a water distribution arrangement which may for example protrude from the inner wall of the bowl at the rear of the toilet bowl.
  • water may be communicated into the bowl from a pair of recesses formed in the wall of the toilet bowl and arranged in use to direct water horizontally as described above. Forming the inlets into recesses in the toilet wall further removes edges around which germs and bacteria may grow which might be associated with a protruding water inlet.
  • the flushing water may be introduced into the bowl close to the upper edge of the rimless bowl. Introducing the water at the top of the bowl maximises the area of the bowl over which the flushing water is arrange to flow and minimises the area of the bowl which is not cleaned.
  • Each of the two opposing water inlets may be formed of a single orifice arranged to communicate water into the bowl.
  • each orifice may be formed of a plurality of apertures each arranged to communicate water into the bowl.
  • substantially horizontally used herein is not limited to a purely horizontal flow of water but to a generally horizontal flow such that, in use, water is directed around the inner surface of the bowl to meet and collide at the opposing side of the bowl.
  • the toilet bowl may be provided with a pair of circumferentially extending water guides or ledges each having a first end adjacent to one of the flushing water inlets and arranged in use to guide or communicate the flushing water in the substantially horizontally opposing directions around the inner circumference of the toilet bowl.
  • each guide advantageously prevents the water from flowing in a manner as found in conventional toilets i.e. directly down towards the U-bend.
  • the guides communicate water from the respective inlets and around the inner surface of the bowl so as to collide on the opposite side of the toilet bowl and to create a ‘plume’ of water which in turn flows into the U-bend.
  • the arrangement of the guides advantageously provides a surface on which water may be communicated.
  • the guides are void of any concealed portions because there are no overhanging surfaces or rim and can be easily and conveniently inspected for cleanliness. As described above the guide surfaces are also advantageously convenient and easy to clean because they are readily accessible to a cleaner.
  • a toilet comprising a rimless toilet bowl and a water distribution arrangement arranged to communicate water into the bowl, the bowl further comprising two generally horizontal water guides disposed on the inner surface of said bowl and arranged to receive in use water from a respective flushing water inlet and to communicate water along an upper surface thereof.
  • each guide or ledge may advantageously be formed as a surface protruding from the inner surface of the toilet bowl i.e. integral with the bowl inner surface. Guides may therefore be conveniently formed using conventional manufacturing techniques.
  • Each guide/ledge is formed of a proximal end adjacent to a respective inlet and a distal end located at some distance around the circumference of the bowl.
  • the ledge may extend around the entire circumference of the bowl so as to meet at the front of the toilet bowl.
  • the guides or ledges may be provided with any suitable profile or configuration comprising a surface on which the water is supported and/or directed as it flows around the bowl.
  • the guides may be in the form of a substantially horizontal surface on which the water is supported and along which the water flows. As discussed above, such a surface advantageously supports the flow of water around the bowl and additionally allows for convenient inspection of the toilet (for cleanliness) and furthermore allows the toilet inner surface to be easily cleaned.
  • each guide/ledge may be angled relative to the inner surface of the bowl to support water on the ledge for an extended period of time as it flows around the bowl.
  • the guides may be adapted e.g. angled along all or a portion of their lengths to allow a portion of the water flowing along each guide to flow over the inner edge thereof so as to flow over the inner wall of the toilet bowl beneath the guide. In effect a portion of the water directed around the inside of the bowl is permitted to flow from the guide in a generally vertical direction down the inside surface of the bowl so as to rinse the inner surface of the bowl.
  • the water flowing from the guide in this fashion will have a generally horizontal component of movement as it flows from the edge of the guide and so the water will circulate around the bowl as it flows from the guide.
  • This advantageously rinses the inner surface of the bowl as it flows around and down the bowl surface.
  • This may be achieved by providing all or part of the ledges with a small angle away from the horizontal such that a portion of the water flows over the inner surface thereof.
  • the ledges may for example be provided with an angle of between 1 and 15 degrees to the horizontal.
  • each ledge with a first width proximate a respective inlet and a second smaller width at a distal end of the ledge.
  • the guides may be arranged to taper from the proximate end to the distal end so that the supporting surface along which the water flows narrows around the circumference of the toilet bowl.
  • the distal ends of the guides may meet at a point on the circumference of the toilet bowl substantially opposite the water distribution apparatus to ensure that water is communicated around the entire circumference of the bowl.
  • the guides may be provided with a first end proximate the respective flushing water inlet having a guide width of between 40 mm and 65 mm, more preferably between 50 mm and 60 mm and most preferably 58 mm.
  • the distal end of each guide may have a width of between 1 mm and 8 mm, more preferably 2 mm and 5 mm and most preferably 3 mm. It has been established that the most preferred values optimise the creation of the flushing plume whilst optimising the cleaning action of the bowl.
  • the plume creation may also be optimised by making the inside of the bowl generally symmetrical.
  • the taper may alternatively be arranged such that the guide terminates a part way around the circumference of the rim i.e. the guides may taper into the bowl wall. It will be recognised that in such arrangement an increasing portion of the water flowing along each guide will be permitted to flow into the bowl.
  • the guides may advantageously be arranged so as to direct the two opposing flows towards each other so as to collide at a position diagonally opposite the inlet apparatus i.e. at the front of the bowl. It will be appreciated that the elevation of the collision point (relative to the height of the bowl from the floor) of the two flows is dependent on the specific configuration of the guides and the flow rate of water.
  • the configuration of the guides is selected such that a sufficient proportion of water collides at the front of the bowl and is directed, by virtue of the momentum of water, in a general direction back across the bowl towards the back of the toilet.
  • a ‘collision point’ is in effect created at which the two streams meet and which creates a turbulent region of water which rebounds across the toilet bowl.
  • each guide proximate the respective flushing water inlet may, as described above, be formed in a recess in the inner wall of the bowl.
  • the recess is in effect formed of a lower surface defined by the tapered guide and an upper opposing surface which acts as a cover to prevent any spray passing from the respective water inlets over the top of the bowl as the water passes at its highest flow rate onto the guides.
  • this surface may taper into the wall of the bowl to maximise access and visibility of the inner surface of the bowl.
  • the inner surface of the toilet bowl may also be provided with a further small orifice which is arranged in use to allow a small quantity of water to flow over the portion of the toilet bowl between the two opposing water inlets. This ensures that the entire surface of the toilet bowl receives a flow of water to provide a complete bowl surface rinse. Only a small proportion of the flushing water received by the toilet need flow over this portion of the bowl.
  • the two opposing inlets may be configured to receive in excess of 90% of the water received into the toilet (45% each) with the remaining quantity passing to the rinse inlet disposed above and between the two opposing inlets.
  • the rinse inlet may be arranged at any suitable height relative to the upper surface of the toilet bowl but is preferably arranged close to the upper surface to maximise the area of the bowl over which water flows
  • a system comprising a toilet including a rimless toilet bowl; a water reservoir connected to said toilet for supplying flushing water to said toilet bowl; and a water distribution arrangement adjacent an inner wall of said bowl arranged to received said flushing water and comprising two bowl inlets arranged in use to direct substantially all of said water in horizontally opposing directions around the inner circumference of the toilet bowl.
  • a toilet comprising a rimless toilet bowl and a pair of opposing water inlets arranged in use to direct water flowing into the toilet in substantially horizontally opposing directions around the inner surface of the toilet bowl, and further comprising a third water inlet disposed above and between said pair of opposing water inlets and arranged in use to direct a small quantity of water into the bowl at a position above and between the inlets.
  • a method for flushing a toilet comprising the steps of providing flushing water to a rimless toilet bowl via a water distribution apparatus comprising two inlets at an inner wall of said toilet bowl; and directing substantially all of said flushing water in first and second substantially horizontally opposing directions around the inner circumference of said toilet bowl so as to collide together at a portion of said inner wall of said bowl located opposite said water distribution apparatus.
  • FIG. 1 shows a cross-sectional perspective view of a conventional toilet comprising a toilet rim
  • FIG. 2 shows a front perspective view of a toilet according to an embodiment the invention
  • FIG. 3 shows a rear perspective view of the toilet
  • FIG. 4 shows a plan view of the toilet
  • FIG. 5 shows a cross-sectional perspective view of the toilet taken on line A-A of FIG. 4 ;
  • FIG. 6 shows a plan view of a toilet according to the invention with the dimensions of a pair of suitable water guides
  • FIGS. 7A and 7B show the toilet bowl in cross-section
  • FIG. 8 shows a view of a section forming a rear portion of the toilet bowl.
  • the toilet according to the invention comprises a rimless toilet bowl 1 and a water reservoir (not shown) for supplying flushing water to said toilet bowl.
  • a water distribution apparatus or arrangement 3 is integrally formed with the inner wall of the toilet bowl 1 . The distribution arrangement is discussed below in more detail with reference to FIGS. 7A and 8 .
  • the water distribution apparatus 3 includes a conduit 4 for receiving water to be supplied to the toilet bowl. This is in fluid communication with the water cistern (not shown).
  • the distribution apparatus also includes two inlets to the toilet bowl 5 and 6 for supplying water to the toilet bowl from the conduit 4 .
  • the inlets may be any suitable size depending on the particular water pressures and characteristics of the system into which the toilet is installed. In one example the inlets are provided with a diameter of 20 mm with a tolerance of + ⁇ 1 mm.
  • outlets 5 and 6 may be formed of a plurality of small apertures.
  • the toilet bowl includes a pair of water guides adjacent to the water distribution apparatus 3 .
  • the guides are first and second symmetrical guiding ledges 7 and 8 . Alternatively a single ledge could also be used.
  • each ledge 7 and 8 has a proximal end adjacent a corresponding inlet 5 and 6 .
  • the ledge then extends circumferentially from its corresponding inlet 5 and 6 around the inner circumference of the toilet bowl 1 to a distal end.
  • the ledges 7 and 8 extend around the circumference of the inner wall and their distal ends meet at a point which is located substantially opposite the water distribution apparatus.
  • the ledges 7 and 8 also incrementally narrow (taper) in width towards the distal end.
  • FIG. 6 An example of optimal tapering of the ledges 7 and 8 is shown in FIG. 6 , where the width of proximal ends of the ledges 7 and 8 nearest the inlets 5 and 6 are approximately 58 mm, and the width of the distal ends at their meeting point is narrowed to approximately 3 mm.
  • the distal ends may only extend along a portion of the circumference of the inner wall and hence not meet at a common point.
  • the distance the ledge extends along the circumference may vary depending on the requirements of the system and the dimensions of the toilet bowl.
  • FIG. 7A shows a cut-away of one side of the toilet and FIG. 7B shows a closed cross-sectional view of the rim of the toilet through B-B shown in FIG. 7A .
  • the ledge may be provided with a surface at a small angle ‘a’ relative to the horizontal in order to increase the flow of water running down the inner wall of the bowl during flushing and to reduce the likelihood of water remaining on the guide ledges after the flushing cycle is complete.
  • the angle a (shown in FIG. 7B ) of incline of the ledges 7 and 8 may for example range from 1° to 15° with respect to the horizontal.
  • the angle may be higher at a portion of the guide proximate the inlet and increase in angle along the length of each guide.
  • the water distribution apparatus may include a portion 11 disposed between the ledges 7 and 8 which extends upwardly from the rear inner wall of the bowl. This is illustrated in FIG. 7A . In effect this smooth portion is part of the chamber forming the water distribution arrangement within the toilet bowl wall.
  • a pair of sidewalls 12 and 13 each intersects the portion 11 and extend rearwardly forming the two opposing surfaces in which the water inlets 5 and 6 are disposed.
  • FIG. 7A illustrates side wall 13 comprising water inlet 5 .
  • portion 11 and the associated side walls are arranged such that the side walls are disposed at an angle to the vertical.
  • water issuing from the water inlet 5 is directed onto the upper surface of the water guide 7 and subsequently along its surface.
  • FIG. 8 shows one embodiment of the portion 11 and the associates dimension thereof As shown in the figure, the angle of inclination of each sidewall ranges from 7.5° to 9° with respect to the vertical.
  • the width of the section may range from 39 to 50 mm at the base and from 56 to 67 mm at the top.
  • the ledges 7 and 8 are also provided with upper guiding ledges 9 and 10 .
  • guides 7 and 8 support and communicate water around the rim from their respective inlets.
  • the upper water guides 7 and 8 provide an opposed surface forming a short channel into which water issues from the respective inlets.
  • the channel retains the water as it leaves the inlets and prevents any overflow or splash from the bowl.
  • the upper guides 9 and 10 are arranged so as to taper into the wall of the bowl therefore maximising access and visibility of the inner surface of the bowl.
  • water enters a chamber formed within the bowl wall (disposed behind the portion 11 ) and exits through inlets 5 and 6 into respective channels defined by the lower guides 7 and 8 and upper guides 9 and 10 .
  • the largest proportion of water is communicated along the upper surface of the ledges 7 and 8 and around the bowl. It will be recognised that water will flow from these guides down into the bowl.
  • the arrows shown in FIG. 7A illustrate the increasing proportion of water which flows from the guides and into the bowl.
  • the portion 11 may therefore be provided with a further small rinsing aperture 14 which is in fluid communication with the chamber disposed behind the section 11 and into which water collects before passing through the inlets 5 and 6 .
  • a small amount of water approximately 6.5% of the total volume of flushing water flows from the chamber through the aperture 14 and down surface of the portion 11 . In effect the aperture rinses this region and also the inner wall of the toilet bowl beneath the portion 11 .
  • a rinsing aperture 14 advantageously increases the total surface area of the bowl which is rinsed during flushing. In this arrangement approximately 93.5% of the flushing water is arranged to flow through the inlets and around the bowl.
  • FIG. 7A depicts the rinsing aperture at the centre of the portion 11 toward its base, the rinsing aperture 14 may be located higher on the portion 11 to allow a greater portion of the surface area below to be rinsed.
  • the rinsing aperture may be disposed above and between the two inlets for flushing water described herein which in itself constitutes an invention.
  • the amount of surface area rinsed may alternatively or additionally be increased by the addition of a pair of mutually opposed recesses or channels located at points 15 and 16 shown in FIG. 7A . These recesses are arranged to communicate a small proportion of water from each of the guides into the region below the section 11 .
  • water is supplied from the reservoir (not shown) to the conduit 4 .
  • the water then passes into a chamber disposed behind the portion 11 and through the inlets 5 and 6 .
  • the inlets direct substantially all of the water in horizontally opposing directions around the inner circumference of the toilet bowl 1 .
  • the guiding ledges 7 and 8 form the other half of a channel to direct the water exiting from the outlets in substantially horizontally opposing directions and prevent water flowing over the top of the toilet over the short portion of the water passage as it first enters the bowl.
  • At least a portion of the opposing streams then collide together at a portion of the inner wall of the bowl located substantially opposite the water distribution apparatus 3 .
  • the specific point on the wall where the collision of the streams will occur may vary depending on the pressure applied to the water and the specifications of the toilet bowl.
  • the first and second streams form a water plume and are directed back toward the rear portion of the inner wall adjacent the water distribution apparatus 3 .
  • the impact and volume is sufficient to move the water trapped in the toilet's U-bend and hence, ‘flush’ the toilet.
  • the dimensions shown in FIG. 6 were surprisingly found to be optimum for enabling the water to flow around to the front of the bowl and form a strong plume suitable for initiating flushing of the toilet.
  • the ledges are not limited to these dimensions as many variations could also be used to create a strong plume suitable for flushing a toilet.
  • more than two water streams may be formed in each direction, however the streams will still be directed in substantially horizontally opposing directions around the inner circumference of the toilet bowl and function in the manner as described above.
  • first and second water streams Whilst a majority of the first and second water streams collide together at the front portion of the inner wall of the bowl located opposite the water distribution apparatus, a portion of the first and second streams also flow over an edge of the water guide to serve the function of rinsing a portion of the inner wall situated below. This is illustrated by the flow arrows in FIG. 7A . This effect may be emphasised toward the end of the flush cycle when the inlet pressure declines and the reach of the outgoing water stream is reduced, allowing it to fall over the side of the ledge.
  • a portion of the first and second stream may flow past the distal end of its corresponding guiding ledge and rinse a portion of the inner wall situated below.
  • the aperture allows a small portion of the flushing water to rinse the area of the rear inner wall below.
  • the rinsing aperture 14 may also advantageously function as a draining aperture for draining water collected in the chamber of the water distribution apparatus during the flushing cycle. Hence, the amount of standing water left in the system after flushing may be reduced. This may be advantageous because standing water may be a potential breeding ground for germs.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
US13/410,095 2007-09-05 2012-03-01 Rimless toilet with flush water distribution apparatus Abandoned US20120210505A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0717274A GB2453319B (en) 2007-09-05 2007-09-05 Rimless toilet
PCT/GB2008/002986 WO2009030904A1 (en) 2007-09-05 2008-09-03 Rimless toilet with flush water distribution apparatus

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2008/002986 Continuation WO2009030904A1 (en) 2007-09-05 2008-09-03 Rimless toilet with flush water distribution apparatus

Publications (1)

Publication Number Publication Date
US20120210505A1 true US20120210505A1 (en) 2012-08-23

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ID=38640285

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/410,095 Abandoned US20120210505A1 (en) 2007-09-05 2012-03-01 Rimless toilet with flush water distribution apparatus

Country Status (8)

Country Link
US (1) US20120210505A1 (ko)
EP (1) EP2203608B1 (ko)
KR (1) KR20100049597A (ko)
CN (1) CN101835945B (ko)
DK (1) DK2203608T3 (ko)
ES (1) ES2569500T3 (ko)
GB (1) GB2453319B (ko)
WO (1) WO2009030904A1 (ko)

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US9719239B2 (en) 2014-03-18 2017-08-01 Kohler India Corporation Private Limited Dual-jet toilet
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US10060113B2 (en) 2014-03-21 2018-08-28 Kohler Co. Rimless toilet
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RU2017126642A (ru) * 2014-12-26 2019-01-28 Еджзаджибаши Йапи Геречлери Санайи Ве Тиджарет Аноним Ширкети Чаша унитаза с передней системой смыва
EP3237695A1 (en) 2014-12-26 2017-11-01 Eczacibasi Yapi Gereçleri Sanayi Ve Ticaret Anonim Sirketi Flushing apparatus for closet bowl with flow rate adjuster
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TR202021894A1 (tr) * 2020-12-28 2022-07-21 Eczacibasi Yapi Gerecleri Sanayi Ve Ticaret Anonim Sirketi Su yönlendi̇ri̇ci̇ kapağa sahi̇p kanalsiz serami̇k sağlik gereci̇
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CN218713669U (zh) * 2022-08-12 2023-03-24 厦门科牧智能技术有限公司 一种马桶座体及马桶

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US9719239B2 (en) 2014-03-18 2017-08-01 Kohler India Corporation Private Limited Dual-jet toilet
US10060113B2 (en) 2014-03-21 2018-08-28 Kohler Co. Rimless toilet
US10233627B2 (en) 2014-03-21 2019-03-19 Kohler Co. Rimless toilet
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WO2017049332A1 (en) 2015-09-21 2017-03-30 Caroma Industries Limited A rimless toilet pan and a method of flushing same
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JP7148835B2 (ja) 2016-11-16 2022-10-06 Toto株式会社 水洗大便器
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GB2453319A (en) 2009-04-08
EP2203608A1 (en) 2010-07-07
GB2453319B (en) 2011-09-21
CN101835945B (zh) 2014-04-23
DK2203608T3 (en) 2016-05-09
WO2009030904A1 (en) 2009-03-12
EP2203608B1 (en) 2016-02-17
GB0717274D0 (en) 2007-10-17
KR20100049597A (ko) 2010-05-12
CN101835945A (zh) 2010-09-15

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