WO2004020753A2 - Toilet assembly - Google Patents
Toilet assembly Download PDFInfo
- Publication number
- WO2004020753A2 WO2004020753A2 PCT/US2003/026287 US0326287W WO2004020753A2 WO 2004020753 A2 WO2004020753 A2 WO 2004020753A2 US 0326287 W US0326287 W US 0326287W WO 2004020753 A2 WO2004020753 A2 WO 2004020753A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- toilet bowl
- flush
- rim
- closet
- Prior art date
Links
Classifications
-
- 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
-
- 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
- E03D11/08—Bowls with means producing a flushing water swirl
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
- E03D1/30—Valves for high or low level cisterns; Their arrangement ; Flushing mechanisms in the cistern, optionally with provisions for a pre-or a post- flushing and for cutting off the flushing mechanism in case of leakage
- E03D1/34—Flushing valves for outlets; Arrangement of outlet valves
-
- 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
- E03D2201/30—Water injection in siphon for enhancing flushing
-
- 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 for the removal of human and other waste.
- the present invention further relates to a toilet which is resistant to clogging, increases flushing capacity, and delivers the flush water volume with greater energy.
- toilets for removing waste products are well known.
- toilets incorporate three systems that work together to perform the flushing action. Those systems are (1) the bowl siphon, (2) the flush mechanism, and (3) the refill mechanism. Working in concert, these three systems allow for the flushing function of the toilet.
- Siphoning is used to transport fluid and waste from the higher elevation of the bowl to a lower elevation of the wastewater line.
- the flow channels in a toilet assembly are designed to begin siphoning when the water in the bowl rises above a certain level.
- the siphon tube itself is an upside down U-shaped tube that draws water from the toilet bowl to the wastewater line.
- Water is drawn out of the bowl and into the siphon tube when the toilet is flushed.
- the flushing action is initiated by water entering the bowl through the action of the flush mechanism and the refill mechanism.
- the bowl is quickly filled with water from the tank positioned above, which causes the siphon tube to fill with water, creating a pressure gradient in the tube.
- the water-filled bowl creates higher pressure at the beginning of the siphon tube, and causes the water and waste to be pushed through the tube and into the wastewater line.
- the tank positioned over the back of the bowl, contains water that is used to initiate the siphoning from the bowl to the sewage line, as well as refilling the bowl with fresh water.
- a flush lever on the outside of the tank, which is connected on the inside of the tank to a movable chain or lever.
- the flush lever When the flush lever is depressed, it moves a chain or lever on the inside of the tank which acts to lift and open the flush valve, causing water to flow from the tank and into the bowl, thus initiating the toilet flush.
- water flows both directly into the bowl and is dispersed into the rim of the toilet bowl.
- the rim typically has several small holes to allow flow into the bowl.
- the water releases into the bowl rather quickly, with flow from the tank into the bowl typically lasting approximately two to four seconds.
- the water flows from the rim, down a channel within the sides of the bowl, into the large hole at the bottom of the toilet, commonly known as the siphon jet.
- the siphon jet releases most of the water into the siphon tube, initiating the siphon action.
- the siphoning action draws all the water and waste out of the bowl and into the siphon tube.
- the waste and water continues through the other end of the U-shaped siphon tube through an area known as the trapway, and is then released into the wastewater line connected at the base of the toilet.
- the flush valve closes, and a floating mechanism, which has now dropped in the tank to some residual amount, initiates the opening of the filler valve.
- the filler valve provides fresh water to both the tank and the bowl through separate flows. Eventually the tank fills with water to a high enough level to cause the float to rise, thus shutting off the filler valve. At this point, the flushing cycle is complete.
- the flush lever for the flush valve assembly have a minimum "hold down" time of 1 second without exceeding the aforementioned total water usage or discharge per flush of 1.6 gallons or 6 liters of water. It has been found that the hydraulic performance characteristics of the toilet can be significantly enhanced if water can be evacuated from the water tank in a dumping time of less than 1 second, preferably 0.5-0.6 seconds. Therefore, it has been further found desirable to provide a toilet which releases the effect of the flush lever so that the valve opening can close before the expiration of the mandated minimum "hold down” time of the flush lever (1 second) without exceeding the total water per flush mandate of 1.6 gallons (6 liters).
- toilet which allows for quieter flushing and decreased likelihood of clogging, increases flushing capacity, and creates a vortex flushing action by having an asymmetrical jet stream rim flow.
- toilet includes a flush valve which minimizes losses of hydraulic force and allows for smooth transition of the water flow from the flush valve to the jet and rim channel supplies.
- An additional advantage of the present invention is to provide a toilet that is resistant to clogging.
- Another advantage of the present invention is to provide a toilet with a flushing mechanism which is capable of cleaning the bowl in a single flush.
- a further advantage of the present invention is to create a toilet which is self-cleaning.
- a still further advantage of the present invention is to provide a toilet with a relatively silent flushing mechanism.
- a yet still further advantage of the present invention is to provide a toilet with a large trapway diameter.
- Yet another advantage of the present invention is to provide a toilet with a high discharge rate into the wastewater line. Still yet another advantage of the present invention is to provide a toilet which has a sweeping flow path to deliver the flush volume to the rim and jet sections with greater energy.
- Yet an additional advantage of the present invention is to provide a toilet with a hydraulically tuned direct jet path for greater performance.
- Still another advantage of the present invention is to provide a toilet having an asymmetrical rim path flow resulting in vigorous vortex action.
- a new and improved toilet which includes a toilet bowl assembly having a toilet bowl and a trapway extending from the bottom of the toilet bowl to a sewage line.
- the toilet bowl has a rim part along an upper perimeter portion that accommodates an asymmetric flow path for flush water.
- a water tank positioned over the toilet bowl assembly contains water that is used to initiate siphoning from the toilet bowl to the sewage line and refills the toilet bowl with fresh flush water after each flush operation.
- This toilet incorporates water supply to the bowl from both a direct jet flow as well as an asymmetrical rim flow.
- the water flows from the tank through the rim in one direction and is dispersed through one slot halfway around the rim (at the front of the bowl) and another slot at the end of the rim's path (at the back of the bowl).
- the water also flows through several other smaller holes distributed evenly along the perimeter of the rim.
- the water discharged from the two large rim slots is in two powerful streams, thus creating a strong vortex that initiates the flushing action.
- This water discharge configuration creates a high energy jet.
- the dispersion from the smaller holes around the perimeter of the bowl serves to wet and clean the bowl.
- This toilet includes a trapway with no reductions in cross sectional area.
- Figure 1 is a side elevational view of a preferred embodiment of a toilet in accordance with the teachings of the present invention.
- Figure 2 is a front elevational view of the toilet of Figure 1.
- Figure 3 is a top elevational view illustrating the flush water flow into the toilet bowl of the toilet of Figure 1.
- Figure 4 is a front perspective view of a preferred embodiment of a flush valve assembly to be incorporated in the toilet of Figure 1.
- Figure 5 is a front perspective view of the flush valve assembly of Figure 4 with the valve opening in its open position.
- Figure 6 is a front exploded view of the flush valve assembly of Figures 4-5.
- Figure 7 is a front plan view of the flush valve assembly of Figure 4.
- Figure 8 is a front sectional view of the flush valve assembly of Figure 4 with the valve opening in its closed position.
- Figure 9 is a front sectional view of the flush valve assembly of Figure 5 with the valve opening in its open position.
- Figure 10 is a front perspective view of the trip release mechanism of the flush valve assembly of Figures 4-5.
- Figure 11 is a front elevational view of the water valve inlet between the water tank and the toilet bowl of the toilet of Figure 1.
- Figure 12 is a side elevational view of the water valve inlet of Figure 11.
- Figure 13 is a side elevational view of the water pathway or conduit leading from the water tank to the toilet bowl in the toilet of Figure 1.
- Figure 14 is a side elevational view of the bowl rim of the toilet of Figure 1 and specifically illustrates a water slot provided in the bowl rim through which flush water passes.
- Figure 15 is a side elevational view of the bowl rim of the toilet of Figure 1 and specifically illustrates the rim holes provided therein through which water passes.
- Figure 16 is a top elevational view illustrating the flush water flow through another preferred embodiment of a rim path for a toilet in accordance with the teachings of the present invention.
- Figure 17 is a side elevational view of the bowl rim of the toilet of Figure 16 taken along line 17-17 of Figure 16.
- Figure 18 is a top elevational view illustrating the flush water path through another preferred embodiment of a rim path for a toilet in accordance with the teachings of the present invention.
- Figure 19 is a side elevational view of the bowl rim of the toilet of Figure 18 taken along line 19-19 of Figure 18.
- Figure 20 is a side view of the toilet bowl of the toilet of Figure 1 filled with water.
- Figure 21 is a side elevational view of the siphon and trapway conduits of the toilet of Figure 1.
- Figure 22 is a side elevational view of another preferred embodiment of a toilet in accordance with the teachings of the present invention.
- Figure 23 is a front elevational view of the toilet of Figure 22.
- Figure 24 is a top elevational view illustrating the flush wall flow into the toilet bowl of the toilet of Figure 22.
- Figure 25 is a top elevational view of another preferred embodiment of a plastic insert for the direct jet channel to be used in conjunction with the toilets of Figures 1 and 18.
- Figure 26 is a top elevational view of another preferred embodiment of a plastic insert for the direct jet pathway to be used in conjunction with the toilet assembly of the present invention.
- Figure 27 is a side elevational view specifically illustrating water flow through the plastic insert of Figure 26.
- Figure 28 is a side view specifically illustrating impeded water flow through a direct jet pathway.
- Figure 29 is a chart representing the flush rate of the toilet of Figure 1 plotting millimeters/second vs. elapsed time.
- this toilet has a greater energy throughput of the flush water to thereby provide more energy available to remove waste from the toilet bowl.
- this toilet permits a toilet to meet governmental agency requirements which mandate a maximum water usage of 1.6 gallons (6 liters) per flush. Further, this toilet improves the flow characteristics of the flow water and flow capacity to provide for not only a more efficient flush but also enhanced cleaning performance and anti-clogging siphoning to assist in waste removal. Moreover, this toilet provides for a quieter and faster flush operation.
- the toilet 10 includes a water tank 12 which includes a flush valve assembly 14.
- the water tank 12 which is positioned over the back of the toilet bowl 20, contains water that is used to initiate the siphoning from the bowl to the sewage line, as well as refilling the bowl with fresh water.
- a flush lever 18 on the outside of the water tank which is connected to the flush valve assembly 14 by a movable chain or lever 19.
- the chain or lever 19 acts to lift open the flush valve opening to be described hereinafter, causing water to flow from the tank 12 and into the toilet bowl 20 thus initiating the toilet flush.
- the flush water passes from the water tank 12 to the toilet bowl 20 through a transition pathway 22, which as will be described in further detail below can be configured as a manifold made of plastic.
- This transition pathway 22 directs the flush water either into a rim channel 24 provided on top of the toilet bowl 20 or into a direct jet channel 29.
- the flush water flows through the rim channel 24 of the toilet in a path which is asymmetric and unidirectional (see arrows A of Figure 3).
- This rim channel 24 includes a plurality of rim openings such as 26a, b, c and d distributed evenly along the perimeter of the rim channel 24 so that a portion of the flush water in the rim channel 24 flows therethrough and along the sides of the toilet bowl so as to pre-wet the entire perimeter of the toilet bowl and provide a side wall cleaning operation.
- a pair of water discharge slots 28a and 28b are provided in the rim channel 24 so that the flush water passing in the asymmetric path through the rim channel 24 can either be dispensed from the rim channel 24 into the toilet bowl through one of the plurality of rim openings, such as 26a, b, c and d, or through one of the pair of water discharge slots 28a and 28b.
- These water discharge slots 28a and 28b discharge flush water directly into the toilet bowl 20 in two water streams (see arrows B & C in Fig. 3) which create a strong vortex action to provide greater siphon energy for waste removal as will be described in greater detail below.
- one of the pair of water discharge slots 28a is provided about halfway around the rim channel 24 and the second of the water discharge slots 28b is provided at a back section 29 of the toilet bowl 20.
- the water flows from the rim openings 26a, b, c and d down the sides of the bowl or directly into the toilet bowl 20 through the water discharge slots 28a and 28b toward the large discharge orifice 30 provided at the bottom of the toilet bowl 20 known as the siphon jet.
- Flush water is also delivered directly into the siphon jet by means of the direct jet channel 29.
- the siphon jet releases most of the water into the trapway 40 initiating a siphoning action.
- the siphoning action draws all the water and waste out of the toilet bowl and into the trapway 40 and is then released into the waste water line connected at the base 31 of the toilet 10.
- the opening of a filler valve (not shown) is initiated.
- the filler valve provides fresh water to both the water tank 12 and the toilet bowl 20 through separate flows.
- the water tank 12 fills to a water lever to cause a float of the flush valve assembly 14 to rise, thus shutting off the filler valve.
- the flushing cycle is now completed.
- the flush valve assembly 14 of the present invention includes a valve body 32, a flush cover member 34 of a predetermined length, and a "trip- release" or “lost-motion” mechanism 36.
- the valve assembly 14 allows the water tank to which it is installed to hold a predetermined volume of water and to also serve as a conduit to deliver water to the toilet trapway via the passages within the toilet.
- the valve body 32 includes a base sleeve portion 38 which is secured to the water tank or water closet by a threaded member 39 provided along the outer peripheral surface 40 of a base support portion 41 thereof.
- the valve body 32 also includes a first cylindrical tube member 46 which extends vertically from the base sleeve portion 38.
- a sealing member or washer 42 is fitted over the threaded member 39 so as to abut against an annular flange surface 43 of the base sleeve portion 38.
- a seal bearing 44 is threaded on the threaded member 39 so as to securely position the sealing member 42 between the annular flange member 43 and the sealing member 44.
- the flush valve cover or closure component 34 is coaxially and slidably mounted with respect to the valve body 32 so that a valve opening 50 is created between the valve body 32 and the flush valve cover 34 when the flush valve cover 34 is removed from the valve body 32.
- the flush valve cover 34 is slidably movable between a first rest position, wherein the flush valve cover 34 is seated on an annular valve seat 52 of the base sleeve portion 38 of the valve body 32 so that water cannot pass through the valve opening 50 (see Figs 4 and 8), and a second position, wherein the flush valve cover 34 is removed from the annular valve seat 52 of the base sleeve portion 38 of the valve body 32 so that water can pass through the valve opening 50 (see Figs. 5 and 9).
- valve opening 50 prevents the flow of flush water into the valve opening until the valve is activated, by means of a flush lever 18.
- the open position of the valve opening 50 allows the flow of flush water to enter the valve opening and proceed into passages within the toilet to which the water tank is attached.
- the flush valve assembly 14 of the present invention achieves a greater energy throughput of the flush water, which in turn generates more energy available to remove waste from the toilet bowl.
- the base sleeve portion 38 of the vent tube includes a radiused inlet 58 which has a diameter a which is approximately 4.5 inches with a radius b of 3 ⁇ " (see Fig. 7) incorporated onto the leading edge 58a of the inlet.
- the radiused inlet 58 of the base sleeve portion 18 creates a discharge coefficient of the valve opening of 0.95.
- the discharge coefficient is the ratio between the actual flow area of the opening area and the static opening area. In practice, the higher the discharge coefficient of the opening, the greater the hydraulic energy of the water passing through the opening. Without providing a radiused inlet at the valve opening with a lead-in angle as in the present invention, the discharge coefficient of the typical prior valve opening is approximately 0.6. Accordingly, the throughput energy of the flush water passing through the valve opening of the flush valve assembly 14 of the toilet of the present invention is greater than the throughput energy of the flush water passing through existing valve assemblies of the prior art as discussed above.
- the flush valve cover 34 includes a funneled inlet 59 at the flush water inlet orifice 60.
- This funneled inlet has a predetermined lead-angle ⁇ to the horizontal axis of the flush valve cover (see Figure 7).
- flush valve cover 34 may include an upper portion 34', a lower portion 34", and a portion 34'" located therebetween which may be a stepped or an inclined portion.
- the diameter of upper portion 34' may be smaller than the diameter of lower portion 34".
- the annular sealing member 64 provided along the bottom surface of the flush valve cover 34 has a diameter which may be larger than that of the lower portion 34".
- the inclined portion 34'" and the diameter of annular sealing member 64 may be designed and/or selected so as to enable a force to be exerted on the flush valve cover 34 during a filing operation which is sufficient to pull the flush valve cover 34 down and cause a proper seal to be formed. Such force may be the minimum force necessary to pull the flush valve cover 34 down and provide the proper seal. Additionally, the diameter of the lower portion 34" is selected so as to provide a desired buoyancy of the flush valve cover 34. Such buoyancy may affect the time period in which the flush valve cover 34 remains opened.
- the flush valve cover 34 may provide a desired buoyancy and enable a minimum pulling force to be applied thereto while providing a proper sealing condition when the flush valve cover is moved to its first rest position. Furthermore, the flow characteristics of the flush water and flow capacity of the flush valve assembly 14 of the present invention are also enhanced by reducing the pulling force necessary to close and properly seal the valve opening 50 when the flush valve cover 34 is moved from its second upper position to its first rest position.
- an annular valve seat 52 is provided downstream of the radiused inlet 58 in the flush water discharge opening 61. As best shown in Figs.
- the annular sealing member 64 is provided along the outer circumferential surface 63 of the flush valve cover 34 which rests in the indented annular valve seat 52 when the flush valve cover 34 is in its first rest position
- the flush valve cover 34 includes a second inner cylindrical tube member 68 secured to the inner peripheral surface of an inner downwardly depending vertical wall member 70 of the flush valve cover 34 by means of a plurality of radially disposed web members (not shown) bridging the second tube member 68 between the inner wall member 70 and the second cylindrical tube member 68.
- the second cylindrical tube member 68 is fitted over the first cylindrical tube member 46 of the valve body 32 so that the flush valve cover 34 is properly guided and accurately aligned with the valve body 32 when the flush valve cover 34 is moved between its first rest position and second upper position.
- This guiding assembly consisting of the first and second cylindrical tube members 46 and 68, respectively, also assists in properly sealing the valve opening 50 when the flush valve cover 34 is returned to its first rest position.
- the guiding assembly assures that the annular sealing member 64 fitted over the flush valve cover 34 is properly seated on the annular valve seat 52 of the valve body 32 in the first rest position of the flush valve cover 34.
- the valve body 32 includes structure to minimize flow resistance.
- This flow resistance minimization member includes a plurality of tapered web members 72a, 72b, 72c radially disposed between the first cylindrical tube member 46 and an inner peripheral portion 73 of the base sleeve portion 38 of the valve body 32.
- each tapered web member 72a, 72b, 72c is formed of a lower height section 75a at an end toward the first cylindrical tube member 46 which increases in height through a tapered section 75b until reaching extended height section 75c at an end toward the inner peripheral surface 73 of the base sleeve portion 38.
- turbulence of the flush water passing through the valve discharge opening 61 is minimized. Hydraulic losses can also result if the flush water does not flow in a laminar manner. Laminar flow can be disrupted by backflow of water within the flush valve assembly 14. In order to reduce backflow of the flush water during the flushing operation, adequate flotation of the flush valve cover 34 must be provided so that the flush water will drain properly. In order to provide flotation of the flush valve cover 34 when the flush valve cover 34 is moved from its first rest position to its second rest position so as to achieve proper flush water drainage, a flotation cavity 76 is formed between the downwardly depending inner and outer wall members 70 and 78, respectively, of the flush valve cover 34.
- the flush valve cover 34 is initially moved from its first rest position, wherein the valve opening 50 is closed, to a second position, wherein the valve opening 50 is opened by means of a flush lever 18.
- This flush lever 18 is displaceable by a user between a first rest position and a second position to operatively move the flush valve cover 34 between its first rest position and second upper position.
- Current agency requirements mandate that the minimum “hold-down" time for the flush lever is one second. However, the longer the valve opening remains open before water is evacuated from the tank, the more energy is dissipated during the flush cycle.
- the flush valve assembly of the present invention can achieve closure of the valve opening 50 in less than 1 second, preferably in 0.5-0.6 seconds, to increase the available hydraulic energy of the flush water and thereby ensure a relatively rapid delivery of a predetermined quantity of flush water without exceeding agency requirements.
- the flush valve assembly 14 includes a "trip-release” or “lost-motion” mechanism 36 which, as described below, releases the effect of the flush lever 18 on the flush valve cover 34 when the flush valve cover 34 reaches its second position so as to return the flush valve cover to its first rest position prior to the flush lever 18 returning to its first rest position.
- the trip release mechanism 36 includes a cam rod 80, a pull rod 82 operatively connected to the flush lever at end 82a and slidably mounted with respect to the cam rod 80 so that the pull rod 82 and the cam rod 80 are moveable in response to movement of the flush lever.
- a trip dog assembly 90 is also incorporated in the trip release mechanism 36 which is capable of engaging the flush valve cover 34 when the pull rod 82 and cam rod 80 are moved between a first rest position and a second predetermined position and is capable of disengaging the flush valve cover 34 when the pull rod 82 moves beyond its second predetermined position.
- the pull rod 82 includes a plurality of extension members, such as 77a and 77b, which includes a narrow width section 79a gradually increasing in width to a raised width section 79b.
- the raised width members 79b extend outwardly to an extent such that they can be received within a receiving opening 100a formed by the inner peripheral surface of an annularly inclined baffle 100, to be explained in more detail below.
- Each of the raised width members 79b include an engaging hole 79c at a lower end thereof.
- the engaging and disengaging members of the trip dog assembly 90 include wing-like retention members 92a, 92b which are supported in the engaging holes 79c of the raised width members 79b of the extension members 77a and 77b.
- the wing-like retention members 92a, 92b extend outwardly to engage the flush valve cover 34 when the cam rod 80 and the pull rod 82 are moved together between their first position and the second predetermined position so as to move the flush valve cover 34 between its first rest and second positions. Further movement of the cam rod 80 is restricted past this second predetermined position as will be described in further detail below.
- Figure 9 illustrates that the wing-like retention members 92a, 92b retract when the pull rod 82 is moved past the second predetermined position so as to disengage the wing-like retention members 92a, 92b from the flush valve cover 34 which in turn allows the flush valve cover 34 to return to its first rest position. More specifically, as shown in Figures 6 and 8, in the first rest position of the cam rod 80 and the pull rod 82, a first catch member 93 of each wing-like retention member 92a and 92b abuts against a leading inclined surface 94a of a central depression cam section 94 of the cam rod 80. The leading edge 95a of a second catch member 95 of the wing-like retention members 92a, 92b abuts against a reduced diameter section 80a of the central depression cam section 94 of the cam rod 80.
- Each of the wing-like retention members 92a, 92b further include an engagement section 97 which is pivoted to extend outwardly and be thereby repositioned when the cam rod 80 and pull rod 82 are returned to their first rest positions.
- the first and second catch members 93 and 95 of the wing-like retention members are contained within the central depression cam section 94 of the cam rod 80.
- the engagement section 97 of each retention member 92a and 92b is engaged with annularly inclined baffle member 100 (see Fig.
- the pull rod 82 When the pull rod 82 is moved past this second predetermined position by further depression of the flush lever 18, the pull rod 82 is subjected to additional bias force being applied by a spring member 104 which is fitted over an upper portion of the cam rod 80 and loaded between a central core member 106 of the pull rod 82 (see Figs. 7 and 10) and a spring knob 108 provided at an upper end of the cam rod 80 (see Figure 10). Since the cam rod 80 is prevented from further movement, when the pull rod 82 is moved past the second predetermined height position and the biased force begins to be applied thereto, the first and second catch members 93 and 95 ride out of the central depression cam section 94 of the cam rod 80.
- This flushing operation causes closure of the valve opening in approximately 0.5-0.6 seconds providing a relatively quick flush operation which causes reduced energy dissipation of the flush water during the flushing operation. Even though the flush valve cover 34 returns to its first rest position to close the valve opening 50, the pull rod 82 continues to move upwardly until the flush lever 18 has complied with its mandatory 1 second "hold-down" time.
- the second cylindrical tube member 68 of the flush valve cover 34 includes an annular extended flange 111 at the upper end thereof (see Fig. 7).
- the wing-like retention members 92a, 92b are cammed to an extended engageable position so that the first catch member 93 of each wing-like retention member 92a and 92b abuts against the leading inclined surface of the central depression cam section 94 of the cam rod 80 and the wing-like retention members 92a and 92b are pivoted into a position whereby the engaging member 97 is capable of engaging the annularly inclined baffle member 100 of the flush valve cover 34 in a subsequent flush operation.
- Figure 11 illustrates a sweep inlet 110 providing a transition between the water tank 12 and the transition pathway 22 so as to maximize throughput energy of the flush water passing into the transition pathway 22 which in turn creates more available energy to remove waste from the toilet bowl.
- the sweep inlet 110 has a radiused port 1 12 at one end thereof having an inclined leading edge 112a, similar to the radiused inlet 58 of the base sleeve portion 38 of the flush valve assembly of Figures 4-9.
- the radiused port 1 12 has a diameter of
- the leading edge 112a is inclined to the horizontal axis of the water tank 12 at a lead-in angle ⁇ .
- the discharge coefficient of the flush valve is increased to approximately 0.95.
- the hydraulic energy of the water passing tlirough the flush valve is increased.
- the hydraulic losses of the flush water passing from the tank to the rim and jet supply channels are reduced such that more energy is created in the flush water to remove waste in the toilet bowl.
- FIG 12 is another arrangement for a flush valve with improved hydrodynamics.
- This flush valve embodiment also includes a valve inlet 115 having a radiused port 116 but does not require elevation of the platform for the water tank as in the valve inlet 110 of Figure 11. Due to the lack of elevation of the platform for the water tank, in order to provide adequate sealing, the valve inlet 115 is made of molded rubber.
- the piers of Figures 11 and 12 are set forth herein for illustrative purposes. These designs provide for a delivery rate of approximately 7.5 liters/sec. into the transitional pathway 22.
- a flush valve cover such as in the flush valve assembly of Figures 4-9 can be used in conjunction with either of these valve inlets 110 and 115.
- other known flush valve assemblies can be adapted to be used in conjunction with these pier concepts.
- Figure 13 illustrates the transitional pathway or sweep elbow 22 leading from the flush valve assembly of the water tank 12 to the rim channel 24 and direct water channel 29.
- the radius R of the sweep elbow 22 is at least 3 inches, that is, the radius R must be at least equal to the narrowed diameter of the radiused inlet.
- the flush valve assembly such as 14 herein will be fitted with a radiused horn (not shown).
- the transitional pathway 22 is preferably made of chinaware and thus provides for the smooth transition of the flow of the flush water from the flush valve 12 to the rim channel 24 and the direct water jet channel 29.
- a "sweeping" flow path is provided to deliver flush water volume with increased energy to the rim channel 24 and direct jet channel 29.
- the flush water delivered from the transitional pathway 22 either passes into the rim channel 24 or the direct water jet channel 29 provided at the back section of the toilet bowl.
- the water jet channel 29 is relatively large preferably (1 5/8" diameter) such that a concentrated stream of flush water is directed into the siphon jet 30 at the base of the toilet bowl (see arrow C in Fig. 3).
- Figures 1 and 3 illustrate that the flush water flows through the spiral rim channel 24 in an unrestricted supply path which is asymmetric and unidirectional.
- the rim cross section is approximately 1 V" x 1 Vz
- the rim channel 24 has two water discharge slots 28a and b, such as the discharge slot shown in Fig. 14. As is shown in Figures 1 and 3, one of the discharge slots 28a is provided at a front section 117 of the rim channel 24 and has a preferred dimension of approximately 3" x 5/8" and the second discharge slot 28b is provided at a rear end section 1 18 of the rim channel 24 and has a preferred dimension of approximately 4" x 1".
- the flush water is discharged through the first and second discharge slots 28a and 28b in two powerful streams to generate a strong vortex action in the sump. This vortex action, in combination with the action of the water jet delivered from the jet channel 29 and the siphon vacuum, leads to a quicker and more complete removal of waste from the toilet bowl as well as provides an efficient bowl cleaning operation.
- the rim channel 24 also includes a plurality of rim openings, such as 26a, b, c and d. In the preferred embodiment, twenty five rim openings are distributed evenly throughout the whole perimeter of the rim channel 24. Each of the rim openings 26a, b, c and d has a diameter of approximately 7/32" with a pitch of approximately 1 Vz
- the flush water passing through the rim openings 26a, b, c and d pre-wets the whole perimeter of the toilet bowl 12. Although energy is dissipated in the flush water passing through the rim openings 26a, b, c and d, this water still contributes additional energy to the creation of a strong vortex in the sump of the toilet bowl to efficiently and quickly remove waste.
- the sides of the bowls are pre-wetted due to the water passing through the rim openings 26a, b, c and d.
- the strong vortex action created by water passing through the siphon jet 29 and the discharge slots 28a and b efficiently washes the walls of the toilet bowl.
- Figure 16 illustrates in more detail the flush water flow through the rim channel 24, and more particularly, the side entry of the water flow from the transitional pathway 22' to the rim channel 24, as shown by arrows D.
- Figure 16 further illustrates that a strong vortex action can be achieved if the flush water is discharged from the rim channel 24 into the toilet bowl 20 by concentrated water streams, such as the water streams depicted by arrows E and F. These two streams E and F compensate for each other and create a strong but yet non-turbulent vortex action in the toilet bowl.
- the two steams E and F are formed by flush water being discharged through the pair of water discharge slots 28a and 28b provided in the rim channel 24.
- FIG. 16 illustrates that one of the discharge slots 28a is provided in the middle of the rim channel path at the front of the toilet bowl and the other discharge slot 28b is formed at the terminus of the spiral of the rim channel 24.
- FIGs 18 and 19 illustrate another preferred embodiment of the configuration of a rim channel 150 for the toilet assembly of the present invention.
- the flush water enters the rim channel 150 from the transitional pathway 22" at a side thereof.
- the flush water flows around the rim channel 150 in the direction of arrows G in Fig. 18 in a path which is asymmetric and unidirectional.
- a first set of rim openings 152a, b and c are provided in the middle of the rim channel path at the front of the toilet and a second set of rim openings 154a, b and c are provided at the end of the spiral rim path.
- a water discharge slit 156 is also formed in the rim channel 150 after the last of the second set of rim openings 154c.
- the rim openings 152a, b and c and 154a, b and c are relatively large and located close to each other.
- the narrow walls (see 158a, 158b) between the rim holes provide rigidity in the vertical direction and reduce distortion of the water flow.
- the combined area of the rim openings 152a, b, and c and 154 a, b and c should be approximately equal to the respective water discharge slots 28a and b in the embodiment of
- Figure 20 illustrates the configuration of the toilet bowl 20.
- Figures 20 illustrates that the toilet bowl 20 has sufficient depth and is wide enough to have a large enough water spot so as to not collect too much water.
- the trapway 40 has a first weir area 162 which connects to a first upwardly inclined trapway section 164.
- the length of the first trapway section 164 is minimized such that the standing water in the sump, first weir area 162 and first trapway section 164 is approximately 0.475 liters (see Fig. 21).
- the first trapway section 164 leads to a downwardly inclined second trapway section 166 which, as shown in Figure 21, has a slope which is directed to the bowl at an angle of approximately 30°.
- a second weir area 168 is provided at a discharge end 169 of the second trapway section 166.
- the trapway 40 next slopes upwardly in a third trapway section 170 which connects to a generally vertically oriented and downwardly depending fourth trapway section 172 which is connected to the sewage line 31.
- the toilet bowl 20 and trapway 40 store approximately 1.9 liters of water.
- the trapway 40 has no reduction in cross-section throughout its entire length.
- each of the sections of the trapway 40 has a diameter throughout its entire length of up to approximately 2.5 inches.
- FIGS 22-24 illustrate another embodiment of a toilet in accordance with the teachings of the present invention which achieves a similar flushing operation to that of Figures 1-3.
- flush water flows through the rim channel 24a (designated by arrow H) and flush water flows through the jet channel 29a (designated by arrow I) in opposite directions after being discharged from the transitional pathway 22a.
- the flush water paths are directed in this manner, hydraulic losses have been found to be minimal.
- Figure 25 illustrates another water flow path for a toilet in accordance with the present invention wherein water flow is directed in the same direction (see arrows J and K) into the rim channel 24b and the direct jet channel 29b.
- a portion 176 of the transitional pathway 22b is formed of a plastic insert.
- Figures 26 and 27 illustrate that the transitional pathway and the direct jet pathway are at least in part formed of a plastic insert, such as 180.
- a first hole 182 is provided in the plastic insert 180 such that flush water is directed to the rim channel 24.
- a second hole 184 is provided at the end of the insert 180 so that flush water can be directed into the base of the bowl.
- Hydraulic losses as appear in the water flow path of Figure 28, are alleviated by providing a smooth channel, the plastic insert 180, to transfer jet water from the valve inlet 110 to the inlet 184 of the jet channel 29 around the bowl.
- This smooth non-turbulent flow is enhanced by using plastic, rubber or some other material insert as compared to the more turbulent flow experienced in the water flow path of Figure 28.
- a toilet has been designed which achieves a greater energy throughput in comparison to existing toilets to thereby provide more flush water energy to remove waste from the toilet bowl.
- the toilet meets governmental agency requirements which mandate a minimum “hold-down" duration of the flush lever of one second and a maximum water usage of 1.6 gallons (6 liters)/flush.
- the toilet of the present invention enhances the flow characteristics and flow capacity of the flush water and provides a flushing operation which is completed in approximately 2.5 seconds (see Figure 29). Further, the trapway design of the toilet reduces the chances of clogging.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002495973A CA2495973A1 (en) | 2002-08-30 | 2003-08-21 | Toilet assembly |
AU2003262785A AU2003262785A1 (en) | 2002-08-30 | 2003-08-21 | Toilet assembly |
EP03791724A EP1554441A2 (en) | 2002-08-30 | 2003-08-21 | Toilet assembly |
MXPA05002333A MXPA05002333A (en) | 2002-08-30 | 2003-08-21 | Toilet assembly. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/231,977 US20040040080A1 (en) | 2002-08-30 | 2002-08-30 | Toilet assembly |
US10/231,977 | 2002-08-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004020753A2 true WO2004020753A2 (en) | 2004-03-11 |
WO2004020753A3 WO2004020753A3 (en) | 2004-05-21 |
Family
ID=31976876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/026287 WO2004020753A2 (en) | 2002-08-30 | 2003-08-21 | Toilet assembly |
Country Status (8)
Country | Link |
---|---|
US (1) | US20040040080A1 (en) |
EP (1) | EP1554441A2 (en) |
KR (1) | KR20050035899A (en) |
CN (1) | CN1685118A (en) |
AU (1) | AU2003262785A1 (en) |
CA (1) | CA2495973A1 (en) |
MX (1) | MXPA05002333A (en) |
WO (1) | WO2004020753A2 (en) |
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AU2013201917B1 (en) * | 2013-03-25 | 2013-11-14 | Azzurra Imports Pty Ltd | Low flush toilet system |
KR101932653B1 (en) * | 2018-01-16 | 2019-03-20 | 고유미 | Water saving type toilet bowl |
US11230834B2 (en) | 2019-03-07 | 2022-01-25 | Duravit Aktiengesellschaft | Sanitary fixture in the form of a water closet |
US11421412B2 (en) | 2019-03-07 | 2022-08-23 | Duravit Aktiengesellschaft | Sanitary fixture in the form of a toilet |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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AU2013201917B1 (en) * | 2013-03-25 | 2013-11-14 | Azzurra Imports Pty Ltd | Low flush toilet system |
WO2014153594A1 (en) * | 2013-03-25 | 2014-10-02 | Azzurra Imports Pty Ltd | Low flush toilet system |
US9399863B2 (en) | 2013-03-25 | 2016-07-26 | Azzurra Imports Pty Ltd | Low flush toilet system |
KR101932653B1 (en) * | 2018-01-16 | 2019-03-20 | 고유미 | Water saving type toilet bowl |
US11230834B2 (en) | 2019-03-07 | 2022-01-25 | Duravit Aktiengesellschaft | Sanitary fixture in the form of a water closet |
US11421412B2 (en) | 2019-03-07 | 2022-08-23 | Duravit Aktiengesellschaft | Sanitary fixture in the form of a toilet |
Also Published As
Publication number | Publication date |
---|---|
AU2003262785A8 (en) | 2004-03-19 |
CN1685118A (en) | 2005-10-19 |
CA2495973A1 (en) | 2004-03-11 |
KR20050035899A (en) | 2005-04-19 |
WO2004020753A3 (en) | 2004-05-21 |
AU2003262785A1 (en) | 2004-03-19 |
MXPA05002333A (en) | 2005-06-08 |
US20040040080A1 (en) | 2004-03-04 |
EP1554441A2 (en) | 2005-07-20 |
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