US3561012A

US3561012A - Refill unit for a flushing apparatus

Info

Publication number: US3561012A
Authority: US
Inventors: Donald M Szymanski
Original assignee: American Standard Inc
Current assignee: Trane US Inc
Priority date: 1969-06-16
Filing date: 1969-06-16
Publication date: 1971-02-09
Anticipated expiration: 1988-02-09
Also published as: FR2046803B1; FR2046803A1; DE2029764B2; DE2029764A1; BE752086A; DE2029764C3

Abstract

A REFILL UNIT POSITIONED WITHIN A TANK OF A WATER CLOSET, AND CONSISTING OF A HOLLOW HOUSING DEFINING A FIRST CYLINDRICAL SWIRL CHAMBER HAVING AN INLET FOR RECEIVING WATER FROM A WATER SOURCE AND AN OUTLET FOR SUPPLYING WATER TO THE TANK, AND A SECOND CYLINDRICAL CHAMBER HAVING AN OUTLET FOR SUPPLYING WATER TO THE WATER BOWL. A PASSAGE CONNECTS THE CHAMBERS AND A DAM IS FORMED IN THE PASSAGE FOR PREVENTING FLOW BETWEEN THE CHAMBERS DURING PREDETERMINED FLOW RATES IN THE INNER CHAMBER.

Description

.Feb. 9, 1971 M. SZYMANSKI REF ILL UNIT FOR A FLUSHING APPARATUS I 4 Sheets-Sheet 1 Filed June 16, 1969 l N VEN'I'OR.

DONALD M. SZYMAN I i/filh J d/L ATTORNEY DI.M'ISZYMANSIKI v 3,561,012

REFILL.UNIT FOR A FLUSHING APPARATUS Filed June 1G, 1969 v 4 sheets sheet 2 eb 9, v D. M. SZYMANSKI ,5

REFILL .UNIT FOR A FLUSHINGYAPPARATUS FiledJ-une 16, 1969' 4 Sheets-Sheet 3 I. I. I.

FCb Q 11M. SZYMANSKI 3,561,012

REFILL UNIT FOR A FLUSHING APPARATUS Filed June 16, 1969 4 Sheets-Sheet 4 United States Patent REFILL UNIT FOR A FLUSHING APPARATUS Donald M. Szymanski, Louisville, Ky., assiguor to American Standard Inc., New York, N.Y., a corporation of Delaware Filed June 16, 1969, Ser. No. 833,598 Int. Cl. E03d 1/22 U.S. Cl. 4--40 23 Claims ABSTRACT OF THE DISCLOSURE A refill unit positioned within a tank of a water closet, and consisting of a hollow housing defining a first cylindrical swirl chamber having an inlet for receiving water from a water source and an outlet for supplying water to the tank, and a second cylindrical chamber having an outlet for supplying water to the water bowl. A passage connects the chambers and a dam is formed in the passage for preventing flow between the chambers during predetermined flow rates in the inner chamber.

BACKGROUND OF THE INVENTION Field of the invention This invention relates to a refill unit and, more particularly, to a refill unit which selectively distributes water from a main source to two or more components of a water closet.

Description of the prior art In US. Pat. No. 3,386,459, assigned to the assignee of the present invention, a flushing apparatus is disclosed which features the use of a water refill unit for selectively distributing the flow of water from the main supply source to a tank, to the rim of the bowl, and to a ventilating apparatus. In general, this unit utilizes an open housing member positioned in the tank and consisting of an upper cylindrical swirl chamber having a water inlet for receiving water from a water source and an outlet for supplying water to the tank; and a lower cylindrical swirl chamber having an outlet for supplying water to the bowl. The upper ends of the inner walls of each of the chambers terminate below the upper ends of their outer walls, so that liquid supplied to the upper chamber will overflow its inner wall for discharging to the lower chamber, and liquid supplied to the lower chamber will overflow its inner wall for discharge to the tank. A filling tube registers with the outlet portion of the lower chamber and terminates near the bottom of the tank for discharging the water into the tank.

Although the unit distributed the water satisfactorily while effectively preventing backflow from the bowl and tank to the main water supply, several problems did develop. For example, the flow of fluid in the chambers of the unit, and from the unit to the tank, was very noisy. Also, the cycling time was relatively long, largely due to the time required for the water to completely empty from the lower chamber. Further, during the end of the cycle when the tank was nearly completely full and only a small amount of water was discharging through the outlet of the lower chamber into the bowl, an equilibrium would often establish between this latter flow and the flow from the main supply, whereby all of the flow from the latter would flow into the lower chamber and into Fiice the bowl, thereby eliminating any rise of the water level in the tank and thus rendering it impossible for the system to completely shut off.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a refill unit of the above type which distributes the :water effectively in a short time with a minimum of noise while eliminating backflow, and which insures a complete shut off of flow through the system.

Briefly summarized, the refill unit of the present invention is adapted to be positioned within a tank of a water bowl flushing apparatus and comprises a closed hollow housing defining a cylindrical swirl chamber having an inlet for receiving water from a water source and an outlet for supplying water to the tank, and a cylindrical chamber having an outlet for supplying water to the bowl. A passage connects the chambers and has a dam portion for preventing flow between the chambers dur- 20 ing predetermined flow rates in the first chamber. Means are provided in the outlet to the tank for minimizing turbulant flow through the outlet and to prevent dripping.

BRIEF DESCRIPTION OF THE DRAWINGS Reference is now made to the accompanying drawings for a better understanding of the nature and objects of the refill unit of the present invention, which drawings illustrate the best mode presently contemplated for carrying out the objects of the invention and its principles, and are not to be construed as restrictions or limiation on its scope. In the drawings:

FIG. 1 is a top plan view of a water closet and supply tank with the tank cover removed to show the refill unit 35 of the present invention and its associated structure, and with a portion of the bowl parts belng shown in section to more clearly illustrate the invention:

FIG. 2 is a cross-sectional view taken along the line 22 of FIG. 1;

FIG. 3 is a cross-sectional view taken along the line 3-3 of FIG. 1;

FIG. 4 is a top plan view of the refill unit of the present invention with the cover plate for the chamber housing being removed;

FIG. 5 is a cross-sectional view taken along the line 55 of FIG. 4, with a portion of the chamber housing cover plate being broken away;

FIG. 6 is a top plan view of the chamber housing cover plate; and

FIG. 7 is a cross-sectional view taken along the line 77 of FIG. 6.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings and specifically to FIG. 1, there is shown a one-piece water closet having a tank 2 and a bowl 4 connected by a flushing passageway 6. The lower portion of the tank front wall is shown by the reference numeral 8 in FIG. 3 and forms the rear wall of the bowl 4. The usual water containing receptacle 10 is formed in the bowl 4 and has an inlet passageway 12 registering therewith below its normal water level which supplies the bowl flushing water for starting the siphon discharge operation from the receptacle 10. The bowl also has a rim passageway 14 which surrounds the top of the receptacle and overlies the inner wall surface thereof.

A plurality of apertures 16 are provided in the passageway 14 for discharging downwardly into the bowl receptacle 10 to wash the side walls thereof, water being supplied to the rim passageway 14 by a conduit 18 which leads from the tank 2. The rim passageway also has an outlet 20 leading from its rear portion to the tank 2 whereby it is connected to a ventilating apparatus 22.

This ventilating apparatus 22, and its associated plumbing 24 are shown in general in FIG. 1, and will not be disclosed in detail since it forms no part of the present invention and is specifically disclosed in the above patent. In general, the bowl receptacle 10 has its usual discharge or waste outlet, not shown, discharging through a conduit having a water trap and downleg. The waste conduit has a portion of its top wall extending into and forming a portion of the bottom wall of the tank, and the ventilating apparatus has its outlet discharging into a conduit which opens in to the downleg through an opening in its side wall.

Also disclosed in the above patent is an inlet pipe associated with the tank 2 which is connected to a source of water under pressure such as a domestic water supply, and which connects at its upper end to a T-shaped conduit having at one end a vacuum breaker member and at the other end a valve shown, in general, by FIG. 1 by the reference numeral 30. The details of this conduit, vacuum breaker, and valve system are also specifically disclosed in the above patent, and will therefore not be described in detail. The valve member can be of a conventional variety and has an operating plunger 32 which is moved up and down by a float or liquid level responsive means 34 carried by a lever arm 36 so that the valve member is open when the float falls to the bottom of the tank, and is closed when the float is at the desired water line.

The outlet chamber of the valve 30 has an outlet 38 which is coupled, by a union 40, to the refill unit of the present invention shown generally by the reference numeral in FIGS. 1, 2 and specifically in FIGS. 3, 4 and 5. Referring specifically to the latter figures, the unit 50, in general, comprises a chamber housing 52, a valve unit 54, a conduit 56 connecting the chamber housing to the valve unit, and a discharge conduit 58 extending from the valve unit. The chamber housing 52 consists of a cover plate 52a and a base portion 52b. The base portion registers with an inlet 60 connected to the union 40, and is partitioned to define an inner cylindrical swirl chamber 62 registering with the inlet 60 and having an outlet 64 for supplying water to the tank 2; and an outer cylindrical chamber 66 having a tangential outlet 68 for supplying water to the bowl 4. A passage 70 connects the inner chamber 62 to the outer chamber 66 and has an inclined portion 72 formed in its floor or bottom wall which acts as a dam. The inner chamber 62 is separated from the outer chamber 66 by means of a wall 74, and a ridge 76 separates the inner chamber from its outlet 64.

The outlet 64 is extended by means of a conduit 80 which contains an open cell foam-like material in the form of a plug 82 to transform the turbulent flow of water through the conduit 80 into a smooth laminar flow, resulting in a well defined, silent stream pattern. The foam plug 82 is disclosed in detail in U.S. Pat. No. 3,428,258, also assigned to the assignee of the present invention, and, in general, is formed of an open pore or reticulated cellular foam material, such as, for example, a polyurathene open-pore foam and preferably is formed or blanked from a sheet of open-pore cellular material of the required thickness to a size approximating or conforming to the external diameter or circumference of the conduit 80. It is emphasized that the open-pore cellular material forming the plug should not act as a filtering media which is not desired in this environment. In this context, the preferred pore size of the plug 82 should be within a range of from 10 to 25 pores per lineal inch, to avoid excessive pressure drop and a filtering action of the material. For other details of the plug 82, reference is made to the latter cited patent.

Attached to the conduit and extending below the foam plug 82 is a concave screen 84, which is utilized to direct the drops of water coming from the plug 82 onto a bead chain 86, so that, near final shut off, the water will flow down the bead chain and into the tank without dripping.

The cover plate 52a of the chamber housing 52 is shown in cross-section in FIGS. 3 and 5, and in detail in FIGS. 6 and 7, and has a bent or flanged outer portion which extends over the outer surface of the outer wall of the base portion 52b of the housing, and a central projecting portion 92 which projects downwardly into the inner chamber 62 of the housing. The purpose of this projection is to aid in preventing water from entering the outlet 64 when the valve unit 54 is open, as will be explained in detail later. The size and shape of this projection is such that it is the same as the vortex that would form if the projection were not there, which vortex contains bubbles that are a source of noise in this environment.

As better shown in FIGS. 6 and 7, the cover plate 52a has a discharge conduit extending outwardly therefrom and generally tangential to the inner chamber 62. This conduit has a reduced end portion 102 designed to accommodate a tube 104 for connection to the ventilating apparatus, and an opening 106 which permits ambient air to flow into the refill unit 50, as will be explained in detail later.

Referring again to the general arrangement of the refill unit 50 as shown in FIGS 3 and 4, the valve unit 54 is operated by means of an operating lever, shown in general by the reference numeral 110, and consisting of an upper arm 110a and a lower arm 11% the latter having a bifurcated lower end portion, as shown. The details of the operation of the valve unit 54 is disclosed in detail in the above patent No. 3,386,459, and, in general, is operable by pivotal movement of the operating lever 110 which moves a gate valve (not shown) disposed within the valve housing to and from an opening between the conduit 56 and the conduit 58 to control the flow of water therethrough. As in the above patent, the size of the gate valve is purposely designed to be slightly less (approximately twenty-thousandths of an inch) than that of its corresponding opening, so that even though the gate valve is in a closed position, it permits a predetermined small flow of water therethrough.

As shown in FIG. 3, the conduit 58 is in the form of a tubular fitting, on which is sleeved an expansion washer or sealing ring 112 which is clamped between end nuts 114 and 116 which, in turn, are threaded on the conduit 58, a spacer sleeve 118 being provided between the nut 114 and the sealing ring 112. The unit thus formed extends into an inlet aperture 120 formed through the front wall 8 of the tank 2, and registering with the inlet to the passageway 18 which, in turn, leads to the bowl rim passageway 14.

As described in patent No. 3,386,459, the bowl flushing passageway 6 (FIG. 1) is supplied with water from the tank 2 through its bottom wall through an outlet conduit 130, as shown in FIG. 2. The latter conduit has a valve seat 132 which is engaged by a flapper type valve member 134 carried by a lever arm 136 which is pivoted at 138 on a shaft which passes through a supporting arm 140 rigid with the valve seat member 132. A second arm 142 is connected to the arm 136 which supports a horizontally extending float member 144 and a container or chamber 146 which has a drain or bleed hole 148 in its bottom end. The float 144 asists in opening the valve 134 once it is moved from its seat 132, and also forms a part of a time delay means along with the container 146, the time delay being established by the volumetric capacity of the container 146 and the size of the drain hole 148.

A flexible operating member 150, which may be in the form of a bead chain, is secured to the upper top end 146a of the container 146, and is connected at its other end to the bifurcated end of the arm 11% of the operating lever 110. The length of the container 146 and the dimension from its pivot 138 to its upper end 146a is such relative to the distance between the fulcrum of the lever 110 and the pivot 138, so that when the lever 110 is moved to an open position, corresponding pull on the flexible member 150 causes the end 146a of the container 146 to move along a path indicated by the dash lines in FIG. 2 until it attains a position indicated by the broken lines in abutment with the arm 11%. This abutment serves to hold the lever 110 in the open position until the water drains out of the container. This movement of the lever arm 110 also moves the valve member (not shown) of the valve unit 54 to an open position so that a large flow of water can pass from the refill unit 50 through the valve unit 54 and the conduit 58 to the rim passageway 18. A safety overflow conduit 152 is also provided in the tank 2, which extends above the normal liquid level in the tank as indicated by the letter L in FIG. 2, and which discharges at 152a into the outlet passageway 130 beneath the valve member 134.

Referring again to FIGv 2, a sleeve 154 extends through a side wall 156 of the tank 2, and is sealed in the wall opening and enlarged on its outer or external end to receive a hollow push-pull plunger member 158. The details of the operation of this plunger and its associated structure are disclosed in detail in the patent No. 3,386,459, it being suflicient to say for the purposes of this application that a manual pushing of the end of the plunger extending outwardly from the tank 2, causes its other end portion to engage against the arm 110a of the lever 110 and rotate same, which rotates the valve member of the valve unit 54 to an open position. This rotation of the lever also causes the chain 150 to be pulled to the left as viewed in FIG. 2 by virtue of its engagement with the arm 110b, thereby pivoting the valve member 134 to its open position, and rotating the container 146 and the float 144 counterclockwise to the position shown by the broken lines in FIG. 2.

It is understood that the arrangement of the structure associated with the plunger 158 is such that, upon the pushing of the plunger the valve associated with the ventilating apparatus remains closed, while upon a pulling of the plunger 158, the valve opens to start the ventilation apparatus, the details of this operation also being described in the latter patent cited above.

The operation of the refill unit of the present invention is initiated by pushing the plunger knob 15 8 inwardly. As described in detail above, this movement rotates the lever 110 in a manner to open the valve member associated with the valve unit 54, and moves the valve member 134 from its seat 132. This latter movement opens the bottom outlet of the tank 2 to the passageway 130 and causes flushing water to discharge from the tank through the passageway 6 into the bowl 4 below the lever liquid therein, and off center so as to establish a counterclockwise water swirl. The water in the bowl 4 will rise and overflow the usual water trap dam and flow down the downleg of the waste outlet siphon, which will create a vacuum through the ventilating apparatus outlet of the conduit leading to the ventilating apparatus in a conventional manner. The pulling of the arm 11% on the flexible member 150 also causes the float 144 and the container 146 to rotate to the position shown by 'the broken lines in FIG. 2, wherein the container 146 will engage the arm 11% to hold the lever 110 in its open position The opening of the valve 134 will cause the water level in the tank to rapidly lower, thereby causing the float 34 to move downwardly within the tank 2, which will open the water inlet valve 30. Water will flow from the main water source through the outlet of the valve 30 into the tangential inlet 60 of the chamber housing 52 of the refill unit 50, and into the upper chamber 62. Due to the centrifugal effects arising from its tangential entry into the inner chamber 62, the water spins or swirls in the chamber 62 and fills it. The swirling action of the Water, in addition to the presence of the projection 92 of the chamber housing cover plate 52a, prevents the water from climbing the small ridge 76 and passing out through the outlet 64 and the conduit 80.

The water thus climbs over the darn 72 and enters the outer chamber 66, whereby it flows through the tangential outlet 68. From the latter outlet the water flows into the conduit 56, through the open valve of the valve unit 54, and through the conduit 58 into the rim supply passageway 14 whereby it discharges through the outlet apertures 16 and into the bowl 4. This water will supplement the water discharging into the bowl through the flushing passageway 6 (FIG. 1), and will serve to wash down the side walls of the bowl. The swirling motion of the wat r in the chamber 62 will also discharge through the outlet conduit in the cover plate 52a into the refill tube 104, and thence into the ventilating apparatus water trap and its inlet, it being understood that any excess water discharging into the water trap will overflow into a passageway and thence flow to the rim passageway 14 into the bowl 4 and bowl trap for replenishing the same.

The flush valve 134, as well as the valve unit 54 will be held open until the water discharges from the container 146, whereupon the weight of unbuoyed float 144 will over-balance the weight of the empty, or substantially empty container 146, and will cause the valve 134 to move to the closed position, and the container 146 to move away from the arm 11%. This latter movement causes the flexible member 150 to pull the arm 1101) to its initial position as shown by the full lines in FIG. 2, wherein the valve unit 54 will close. In this position the substantial flow of water is prevented from flowing through the passageway 56, and therefore from the lower chamber 66.

The water in the chamber housing 52 will therefore rise over the rim 76 of the inner swirl chamber 62, and flow through the outlet 64 and the conduit and therefore through the foam plug 82, the screen 84, and along the bead chain 86, whereby it refills the tank 2 with a minimum of noise and dripping, rendering the tank ready for another flushing operation. However, as long as the valve 30 remains open, which will be until the level of the water in the tank 2 reaches the line L, there will be some water flowing through the valve unit 54 and the passageway 58 due to the above mentioned clearance provided by the gate valve in the valve unit 54. This latter water will replenish the bowl and bowl trap in conjunction with the overflow, if any, from the trap associated with the ventilating apparatus.

As emphasized above, the arrangement of Patent No. 3,386,459 was susceptible to a prolonged cyc ing and, possibly, an incomplete shutting ofl of the main water supply thhough the valve 30, due to an equilibrium being established between the water distributed to the rim portion of the bowl through the refill unit, and the supply water passing through the valve 30. As a result of this, no water would flow into the tank and therefore the valve 30 would not completely shut off due to the inaction of the float 34.

The arrangement of the present invention overcomes this by providing the dam 72 in the passageway 70 between the

chambers

62 and 66, which, at a predetermined low flow rate, prevents flow from the inner chamber 62 to the outer chamber 66 thereby forcing the water in the inner chamber to pass over the rim 76 and into the tank through the outlet 64 and the conduit 80. In connection with this, it is noted that the opening 106 formed through the lid 52a of the chamber housing cover plate permits air to flow into the chamber and thus break any vacuum which would otherwise occur when flow rates from the chamber exceed those into the chamber, and due to the differential heights of water within the housing 52, which vacuum would prevent water from flowing over the rim 76 and into the outlet 80. Rather, the air entering the housing breaks the vacuum and permits the water to fiow over the rim 76 and out through the outlet 64 and conduit 80 despite the presence of the above conditions.

Therefore, as a result of the breaking of the vacuum and the pressure of the dam 72, a flow rate is reached in which water ceases to flow into, and therefore from, the outer chamber 66, and all of the water flows out of the outlet 80, thus raising the water level in the tank until a water level is reached which shuts off the water valve 30 completely.

As in Patent No. 3,384,459 the arrangement and operation of the inner swirl chamber 62 and the outer chamber 66 are such that if a vacuum or reduced pressure should ooccur in the main supply line, water cannot accidentally be drawn from the tank 2, or from the bowl 4 or its rim, into the main water supply system, for reasons that are clearly set forth in that disclosure.

Since the ventilating system disclosed in Patent No. 3,386,459 may be incorporated in the present system, its operation will not be described in any further detail.

It can be appreciated that the refill unit of the present invention is not limited to uses in a water closet, but can be used in any environment in which simi ar fluid filling operations are desired.

Of course, variations of the specific construction and arrangement of the refill unit disclosed above can be made by those skilled in the art without departing from the invention as defined in the appended claims.

What is claimed is:

1. A water closet refill unit adapted to be positioned within a Water closet tank and comprising a hollow housing defining a first cylindrical swirl chamber having an inlet adapted to receive water from a water source and an outlet adapted to supply water to said water closet tank, and a second chamber extending radially outwardly from said second chamber and having an outlet adapted to supply water to a bowl, passage means connecting said chambers, and means disposed in said passage means for preventing fiow between said chambers during predetermined flow rates in said first chamber, said means being an inclined portion formed in the floor of said passage means to act as a dam.

2. The improvement of claim 1 wherein the outlet of said first chamber extends through its bottom, and the outlet of said second chamber extends through its outer Wall.

3. The improvement of claim 1 wherein the inlet of said first chamber and the outlet of said second chamber are substantially tangential.

4. A water closet refill unit adapted to be positioned within a water closet tank and comprising a hollow housing having a base portion defining a first cylindrical swirl chamber having an inlet adapted to receive water from a water source and an outlet adapted to supply water to said water closet tank, and a second chamber registering with said first chamber and having an outlet adapted to supply water to a bowl; and a cover plate covering said base portion to minimize noises from water flow in said chambers, said cover plate having a projecting portion extending within the central portion of said first chamber to prevent formation of a vortex in said first chamber.

5. The improvement of claim 4 wherein air intake means are formed through said cover plate.

6. The improvement of claim 4 wherein said second chamber extends radially outwardly from said first chamber.

7. The improvement of claim 4 wherein the outlet of said first chamber extends through its bottom, and the outlet of said second chamber extends through its outer wall.

8. The improvement of claim 4 wherein the inlet of 8 said first chamber and the outlet of said second chamber are substantially tangential.

9. The improvement of claim 4 further comprising passage means connecting said chambers and means disposed in said passage means for preventing flow between said chambers during predetermined flow rates in said first chamber.

10. A water closet refill unit adapted to be positioned within a water closet tank and comprising a hollow housing defining a first cylindrical swirl chamber having an inlet adapted to receive water from a water source and an outlet adapted to supply water to said water closet tank, and a second chamber registering with said first chamber and having an outlet adapted to supply water to a bowl, said first chamber outlet adapted to terminate a spaced distance from the bottom of said bowl, and means disposed in said first chamber outlet for dampening turbulent fiow from said outlet, said dampening means comprising an open cell foam-like material disposed in said first chamber outlet.

11. The improvement of claim 10 further comprising means carried by said first chamber for eliminating dripping of water from said outlet.

12. The improvement of claim 11 wherein said means for eliminating water dripping comprises a generally concave shaped screen extending over said first chamber outlet, and a bead chain extending downwardly from said screen.

13. The improvement of claim 10 wherein said second chamber extends radially outwardly from said first chamber.

14. The improvement of claim 10 wherein the outlet of said first chamber extends through its bottom, and the outlet of said second chamber extends through its outer wall.

15. The improvement of claim 10 wherein the inlet of said first chamber and the outlet of said second chamber are substantially tangential.

16. A water closet refill unit adapted to be positioned within a water closet tank and comprising a hollow housing defining a first cylindrical swirl chamber having an inlet for receiving water from said water source and an outlet for supplying water to said tank, and a second chamber registering with said first chamber and having an outlet for supplying water to a bowl, said first chamber outlet adapted to terminate a spaced distance from the bottom of said bowl, means disposed in said first chamber outlet for dampening turbulent flow from said outlet, means carried by said first chamber outlet for eliminating dripping of water from said latter outlet, said means for eliminating water dripping comprising a generally concave shaped screen extending over said outlet, and a bead chain extending downwardly from said screen.

17. The improvement of claim 16 wherein said second chamber extends radially outwardly from said first chamber.

18. The improvement of claim 16 wherein said outlet of said first chamber extends through its bottom, and the outlllet of said second chamber extends through its outer wa 19. The improvement of claim 16 wherein the inlet of said first chamber and the outlet of said second chamber are substantially tangential.

20. The water closet refill unit of claim 16 further comprising a tank connected to a water source, a bowl connected to said tank, and a flushing apparatus disposed in said tank for flushing said bowl, said refill unit being positioned within said tank.

21. The water closet refill unit of claim 4 further comprising a tank connected to a water source, a bowl connected to said tank, and a flushing apparatus disposed in said tank for flushing said bowl, said refill unit being positioned within said tank.

22. The water closet refill unit of claim 10 further comprising a tank connected to a water source, a bowl con- 9 nected to said tank, and a flushing apparatus disposed in said tank for flushing said bowl, said refill unit being positioned Within said tank.

23. The water closet refill unit of claim 16 further comprising a tank connected to a Water source, a bowl connected to said tank, and a flushing apparatus disposed in said tank for flushing said bowl, said refill unit being positioned within said tank.

1,971,880 8/1934 Taylor 413 10 Kohlmeyer 412 Ducey 137216 Ducey 441 Parkison et a1. 472X Ward 4-13 LAVERNE D. GEIGER, Primary Examiner H. K. ARTIS, Assistant Examiner US. Cl. X.R.