U.S. patent number 3,860,973 [Application Number 05/347,877] was granted by the patent office on 1975-01-21 for toilet construction.
This patent grant is currently assigned to International Telephone and Telegraph Corporation. Invention is credited to Tim Minoru Uyeda, David Edward Workman.
United States Patent |
3,860,973 |
Uyeda , et al. |
January 21, 1975 |
TOILET CONSTRUCTION
Abstract
A toilet comprising a base structure which is divided into
separate upper and lower sections. The lower section is mounted on
a support, while the upper section is releasably secured to the
lower section from outside the lower section which allows access to
the internal parts of the toilet without removing the base from the
support or disconnecting the inlet water line. The front and side
walls of the base are devoid of any openings, except for the
control lever, so that water cannot splash into the interior of the
toilet base.
Inventors: |
Uyeda; Tim Minoru (South San
Gabriel, CA), Workman; David Edward (Orange, CA) |
Assignee: |
International Telephone and
Telegraph Corporation (New York, NY)
|
Family
ID: |
23365661 |
Appl.
No.: |
05/347,877 |
Filed: |
April 4, 1973 |
Current U.S.
Class: |
4/332; 4/435 |
Current CPC
Class: |
E03D
5/012 (20130101); E03D 11/10 (20130101) |
Current International
Class: |
E03D
5/012 (20060101); E03D 11/10 (20060101); E03D
11/02 (20060101); E03D 5/00 (20060101); E03d
005/012 (); E03d 011/00 () |
Field of
Search: |
;4/79,1,8,9,10,17,66,68,76,77,78,79,80,84,92,115,203,252R,86,87 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Huckert; John W.
Assistant Examiner: Levy; Stuart S.
Attorney, Agent or Firm: Peterson; Thomas L.
Claims
What is claimed is:
1. A toilet construction comprising:
a hollow base structure adapted to be mounted on a flat support
over a drain opening in said support, said base structure having an
open bottom;
a bowl mounted within said base structure having a discharge
outlet;
flush valve means adjacent to said discharge outlet for controlling
the flow of water therethrough;
conduit means extending downwardly from said flush valve means to
said open bottom of said base structure for connection to said
drain opening;
water valve means within said base structure but outside said bowl
for controlling the flow of water from a water source to said
bowl;
a seat for said bowl;
said base structure being divided into separate hollow upper and
lower sections, said upper section carrying said seat and having
its perimeter overlying the perimeter of said lower section;
means releasably securing said upper section to said lower section
from outside said lower section;
means connecting said bowl to said lower section;
said upper section being disconnected from said bowl whereby said
upper section is separable from said bowl; and
said lower section being adapted to be fixedly mounted to said
support, whereby said upper section may be removed from said lower
section to obtain access to the interior of said lower section
without removing the lower section from said support.
2. A toilet construction as set forth in claim 1 wherein:
said lower section of said base structure has a front wall and a
pair of side walls, one of said side walls having an opening
therethrough;
said flush valve means having an operating arm extending through
said opening; and
said front wall and side walls being devoid of any apertures other
than said actuating arm opening.
3. A toilet construction as set forth in claim 1 including:
means removably mounting said bowl, flush valve means and water
valve means to said lower section of said base structure.
4. A toilet construction as set forth in claim 1 wherein:
said lower section is formed with a floor therein having a central
aperture generally coaxial with said discharge outlet;
a plurality of hollow upstanding bosses on said floor opening at
the bottom thereof; and
fastening means extending through the upper end of each hollow boss
for securing said flush valve means and said bowl to said lower
section.
5. A toilet construction as set forth in claim 1 wherein said flush
valve means includes:
a wall having an inlet port therein adjacent to said discharge
outlet, the portion of said wall surrounding said inlet port having
upper and lower surfaces, a movable valve means adjacent to and
below said lower surface for closing said inlet port, a resilient
sealing ring extending about the inner periphery of said inlet
port, said sealing ring having a lower surface extending below said
wall lower surface to engage said valve means;
said sealing ring having an upper surface extending above said wall
upper surface;
said sealing ring being slidably mounted in said inlet port from
above said wall; and
said discharge outlet engaging said upper surface of said sealing
ring whereby said ring functions as a combined valve and bowl
seal.
6. A toilet construction as set forth in claim 1 wherein:
said bowl has an upper rim;
said upper section having a flange extending over said upper rim;
and
sealing means are provided between said flange and said upper
rim.
7. A toilet construction as set forth in claim 1 wherein:
the upper edge of said lower section engages the lower edge of said
upper section.
8. A toilet construction as set forth in claim 1 having a lid and
including:
means pivotally mounting said seat and said lid to a rear portion
of said upper section, with said lid overlying said seat.
9. A toilet construction as set forth in claim 1 including:
means for attaching said lower section to said support, said lower
section having generally upstanding front and side walls adjacent
to said support, said attaching means being located within the
confines of said walls.
10. A toilet construction comprising:
a hollow base structure divided into separate upper and lower
sections, said lower section having an open bottom and being
adapted to be mounted on a flat support over a drain opening
therein;
means releasably securing said upper section to said lower section
from outside said lower section;
a bowl in said base structure having a discharge outlet;
flush valve means within said lower section adjacent to said
discharge outlet for controlling the flow of water
therethrough;
water valve means within said lower section for controlling the
flow of water from a water source to said bowl;
means for attaching said lower section to said support;
said lower section having generally upstanding front and side walls
adjacent to the bottom thereof;
said attaching means being located within the confines of said
walls whereby said attaching means is accessible through said lower
section when said upper section is removed therefrom;
one of said side walls having an opening therein;
said flush valve means having an operating arm extending through
said opening; and
said front wall and side walls being devoid of any apertures other
than said actuating arm opening.
11. A toilet construction as set forth in claim 10 wherein: said
upstanding front and side walls extend to the bottom of said lower
section.
12. A toilet construction comprising:
a hollow base structure divided into separate upper and lower
sections, said lower section having an open bottom and being
adapted to be mounted on a flat support over a drain opening
therein;
means releasably securing said upper section to said lower section
from outside said lower section;
a bowl in said base structure having a discharge outlet;
flush valve means within said lower section adjacent to said
discharge outlet for controlling the flow of water
therethrough;
water valve means within said lower section for controlling the
flow of water from a water source to said bowl;
means for attaching said lower section to said support;
said lower section having generally upstanding front and side walls
adjacent to the bottom thereof;
said attaching means being located within the confines of said
walls whereby said attaching means is accessible through said lower
section when said upper section is removed therefrom;
said lower section being formed with a floor therein having an
aperture adapted to be positioned in alignment with said drain
opening; and
said attaching means extending through said floor.
Description
BACKGROUND OF THE INVENTION
This invention relates generally to toilets and, more particularly,
to an improved flush-type toilet construction which is particularly
suited for use in recreational vehicles.
While the present invention will be described particularly in
connection with recreational vehicle toilets, it will be
appreciated that the invention may be embodied in any flush-type
toilet, including permanently installed home-type toilets or the
like.
The increased demand in recent years for recreational vehicles,
such as house trailers, campers, and the like, has raised the need
for flush-type toilets which are simple in construction and,
therefore, relatively inexpensive and which may be easily
disassembled for repair or replacement of parts within the interior
of the toilet.
One form of a flush-type toilet suitable for recreational vehicles
is disclosed in U.S. Pat. No. 3,369,260 to Sargent et al. The
toilet disclosed in this patent utilizes a gate valve for
controlling the flow of water from the discharge outlet of the bowl
of the toilet and a rotary valve for controlling the flow of water
into the bowl. A foot pedal and linkage is provided for opening and
closing the gate valve and the water valve simultaneously. A plenum
is integrally formed about the rim of the bowl which collects water
when the gate valve is opened. After the gate valve is closed,
water from the plenum drains into the bowl to provide a suitable
body of water in the bowl for a water seal and additional flushing
operations. The control linkage for the gate valve and water valve
is completely exposed near the bottom of this toilet. While such an
arrangement might be convenient for the repair and replacement of
parts in the control linkage of the toilet, such linkage -- not
being enclosed -- is readily subjected to contamination or rust
caused by urine or water which might splash upon the toilet if it
is mounted in a shower, which is common in recreational vehicles.
It is, therefore, desirable that the operating parts of the flush
valve and water valve be enclosed within a housing.
U.S. Pat. No. 3,601,820 to Sargent et al discloses a toilet
structure similar to that described in the aforementioned Sargent
et al patent except that the control linkage for the valves of the
toilet are mounted within a substantially closed housing, thus
providing some protection for such parts. However, the front wall
of the housing or base of the toilet is provided with a relatively
large aperture through which the foot pedal for controlling the
valves extends. Hence, water or urine can still splash into the
interior of the toilet to contaminate the parts or cause rust. This
toilet employs an annular cover ring which is separably mounted to
the base of the toilet. However, the cover ring cannot be removed
from the base unless the base is removed from the floor. As a
consequence, access to the interior of the base of the toilet for
performing repairs or replacement of parts can be achieved only by
removing the toilet from the floor and disconnecting the inlet
water line from the toilet. It is apparent that removing the toilet
base from the floor is a time-consuming and inconvenient procedure
for gaining access to the interior of the toilet.
Another form of recreational vehicle toilet is disclosed in U.S.
Pat. No. 3,308,481 to O'Brien et al. This toilet comprises a
pedestal which is integrally formed with a toilet bowl. The
pedestal is mounted over an inner housing which carries the water
valve and the operating mechanism for the flush valve of the
toilet. The pedestal is provided with an outwardly extending floor
flange which allows the pedestal to be secured to the floor by
means of bolts passing through the flange. The floor flange
provides an area for collecting water or urine which may cause
contamination and rusting of the exposed flange bolts. In addition,
like the toilet disclosed in the aforementioned U.S. Pat. No.
3,601,820 the Sargent et al toilet must be removed from the floor
in order to obtain access to the inner housing which carries the
flush and water valves and control mechanism therefor. As a
consequence, it is also inconvenient to perform maintenance on this
toilet.
The purpose of the present invention is to overcome the attendant
disadvantages of the prior art toilets by providing a construction
which permits the user to readily gain access to the interior of
the toilet for performing maintenance or repair without requiring
the toilet base to be removed from the supporting floor. Another
object of the invention is to provide a toilet which eliminates
outwardly extending floor flanges and front apertures to thereby
minimize areas where contamination might occur.
SUMMARY OF THE INVENTION
According to the principal aspect of the present invention, there
is provided an improved toilet construction comprising a base
structure which is adapted to be mounted on a support, such as the
floor of a recreational vehicle. The base structure is divided into
separate upper and lower sections. The upper section which carries
the seat for the toilet is releasably secured to the lower section
from outside the lower section whereby the upper section may be
removed from the lower section to obtain access to the interior of
the lower section without removing the latter from the floor
support. Thus, maintenance and repair of the parts in the interior
of the toilet are greatly facilitated. In addition, the lower
section of the base has front and side walls which are completely
closed except for a small opening in one side wall through which
the operating arm for the flush and water valves of the toilet
extends. Thus, the parts in the interior of the toilet are
protected from any water or urine which might be splashed upon the
walls of the base. Moreover, because the upper section of the
toilet base structure is removable from the lower section, the
lower section may be mounted to the floor support through the
interior thereof, thus avoiding the necessity of having outwardly
extending floor flanges on the bottom of the base. It will be
appreciated that by this design of the toilet base, areas for
collection of water, which would otherwise produce contamination or
rust of mounting bolts, are avoided. Other aspects and advantages
of this invention will become more apparent from the following
description taken in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the toilet construction of the
present invention with the lid of the toilet shown in its raised
position;
FIG. 2 is a plan view of the lower section of the toilet, the upper
section and the bowl being removed;
FIG. 3 is a vertical sectional view taken along line 3--3 of FIG. 2
with the upper section of the toilet mounted in place, the hoses in
the toilet being shown on a reduced scale so that the other parts
of the toilet may be more clearly seen;
FIG. 4 is a fragmentary plan view of the toilet bowl utilized in
the toilet construction of the present invention, showing the inlet
and outlet ports therefor; and
FIG. 5 is a vertical sectional view taken along line 5--5 of FIG. 2
showing the details of the arrangement for mounting the lower
section of the toilet to the floor support.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings in detail, there is illustrated the
toilet construction of the present invention, generally designated
10, which is mounted on a floor support 12, which may be the floor
of a recreational vehicle or the like. In general, the toilet
comprises a base structure 14 in which a bowl 16 is mounted. A seat
18 and a lid 20 are provided for the bowl. The discharge outlet 22
of the bowl 16 is connected to a flush valve assembly 24 which is
fixedly mounted in the base structure 14. The flush valve assembly
comprises a gate valve having a horizontally movable valve blade 26
which is movable from a position as seen in FIG. 3 closing the
discharge outlet 22, to a second position remote from the discharge
outlet wherein water will exit from the bowl and pass through a
cylindrical outlet port 27 on the valve assembly 24 to a sewer
drain 28 mounted in the floor support 12. A rotary water valve 30
is mounted on the flush valve assembly 24. The inlet (not shown) of
the water valve is connected to a flexible copper conduit 32 which
is coupled to a water inlet line, not shown. The outlet 34 of the
water valve is connected by a flexible plastic hose 36 to one port
38 of a vacuum breaker valve 40. The vacuum breaker valve may be of
any conventional design and constitutes no part of the present
invention. However, it is preferred that a vacuum breaker be
utilized as described in copending application of Milette et al
entitled "Vacuum Breaker Valve", Ser. No. 332,371, filed on Feb.
14, 1973, now U.S. Pat. No. 3,788,342, assigned to the assignee of
the present application. The outlet port 42 of the vacuum breaker
valve is connected by an additional flexible hose 44 to an outlet
port 46 at the rim 48 of the bowl 16. An overflow port 50 is also
provided at the rim 48 which receives a small amount of water
discharged from the inlet port 46 during each flushing operation.
This water is conveyed by means of an S-shaped flexible hose 52 to
a port 54 on the flush valve assembly 24. The water flowing through
the hose 52 to the port 54 serves to rinse out the flush valve
assembly. Also, the hose 52 and port 54 provide a by-pass flow path
around the valve blade 26 to allow water to escape from the outlet
27 of the valve assembly 24 in the event the level of water in the
bowl 16 rises to the height of the outlet port 50. The water in the
S-shaped hose 52 between the ports 50 and 54 serves as a water trap
to prevent waste gases from passing through the system.
A foot pedal 60 (seen only in FIG. 1) is connected to the end of a
control lever 62 near the front portion of the toilet. The lever 62
is in the form of a cylindrical metal rod which has a horizontally
extending portion 64 that extends through a small opening 266 in
the upper wall portion of the base structure 14. The lever is
mounted on the housing 67 of the flush valve assembly 24 for
pivotal movement about the longitudinal axis of the horizontally
extending portion 64 thereof. The inner end 68 of the lever 62 is
bent at a right angle to the horizontally extending portion 64. An
actuating arm 70 is fixedly connected to the rotatable stem 72 of
the water valve 30. A second actuating arm 74 is fixedly connected
to a rotatable vertically extending shaft 76. The shaft is fixed to
the shank portion 78 of the gate valve blade 26. A link 79 is
pivotally connected at one end to the end 68 of the lever 62 and at
its opposite end to the actuating arm 74 for the valve blade 26. A
second link 80 is pivotally connected at one end to the end 68 of
the lever 62 and at its opposite end to the actuating arm 70 of the
water valve. A coil spring 82 normally biases the end 68 of the
lever 62 downwardly and thus the pedal 60 to its uppermost position
as seen in FIG. 1. When the pedal 60 is depressed, the lever 62
will pivot about the longitudinally extending axis of the
horizontal section 64 thereby lifting the inner end section 68.
Initial lifting of the end section 68 will cause the actuating arm
70 to move upwardly rotating the valve stem 62 to open the water
valve 30 and introduce water through the port 46 into the bowl 16.
Further lifting of the end section 68 will cause the actuating arm
74 to rotate in a counter clockwise direction as viewed in FIG. 2,
thereby rotating the shaft 76 and hence the valve blade 26 fixed
thereto. Hence, the valve blade will be shifted to its open
position allowing the contents of the bowl 16 to be flushed through
the outlet 26 of the valve assembly 24 to the sewer drain 28. When
the pedal 60 is released, the valve blade 26 will shift to its
closed position and the water valve 30 will close, in sequence, so
that a body of water will remain in the bowl to provide a water
seal at the discharge outlet of the bowl. For further description
of the details of structure and operation of the flush valve
assembly 24, reference may be made to the copending application of
Milette et al entitled "Toilet Valve Assembly", Ser. No. 347,858,
filed on Apr. 4, 1973, now U.S. Pat. No. 3,835,479, filed
concurrently herewith and assigned to the assignee 0f the present
application. It should be noted that the flush valve assembly 24
described herein is given by way of example only and constitutes no
part of the present invention. Other flush valve assemblies may be
utilized if desired in the toilet construction of the present
invention.
According to an important feature of the present invention, the
base structure 14 of the toilet is divided into separate upper and
lower sections 90 and 92, respectively, the line of division
between such sections being adjacent the upper end of the base
structure. The upper section 90 of the base structure includes
generally vertically extending front and rear walls 93 and 94 and
vertically extending side walls 96 which are continuous with one
another. An annular flange portion 98 extends inwardly from the
upper edge of the front, rear and side walls of the upper section
90 over the rim 48 of the bowl 16. The inner edge 100 of the flange
portion 98 is bent downwardly to provide a protective cover for
water which exits from the inlet 46 at the rim of the bowl. The
flange portion 98 also embodies a downwardly extending cylindrical
wall 102 spaced from the inner edge 100. A cylindrical upper wall
portion 104 at the rim 48 of the bowl surrounds the wall 102. An
annular sealing element 106 is provided between the flange 98 and
the rim 48. This sealing element has an inverted U-shaped
configuration in cross-section whereby the element may be mounted
over the cylindrical wall portion 104 at the rim to engage both the
bottom surface of the flange portion 98 and the outer surface 108
of the cylindrical wall 102 of the flange.
At the rear of the flange portion 98 of the upper section 90, there
is formed a centrally located upstanding hollow enclosure 110 into
which the vacuum breaker 40 extends thereby providing a cover for
the vacuum breaker. The vacuum breaker 40 itself is fixedly mounted
on an upstanding supporting section 112 formed adjacent the rear
portion of the lower section 92 of the toilet base.
The lid 20 is formed with two downwardly extending flanges 114
which are disposed on opposite sides of the upstanding hollow
enclosure 110 on the upper section 90. The rear portion of the
toilet seat is formed with a pair of upstanding projections 116
which are disposed on opposite sides of the two flanges 114 on the
lid 20. A pivot pin 118 extends horizontally through each
projection 116, flange 114 and the adjacent side wall of the hollow
enclosure 110 so that the seat 18 and lid 20 are pivotally mounted
for up and down movement on the upper section 90 of the toilet
base.
A hollow upstanding boss 120 is integrally formed in the upper
front port 122 of the lower section 92 of the toilet base. The boss
opens at a downwardly facing portion 124 of the upper front port
122 of the base. A hollow cylindrical projection 125 integral with
the flange portion 98 on the upper section 90 extends downwardly
and coaxial with the boss 120. A self-threading screw 126 extends
upwardly through an opening 128 at the top of the boss 120 and is
threadally engaged in the hollow projection 125 to secure the front
portion of the upper section 90 to the lower section 92 of the
toilet base. A pair of tabs 130 are formed on the outer surface of
the upper rear wall portion 132 of the lower section 92 of the
base. These tabs engage in corresponding openings 134 formed in the
rear wall 94 of the upper section 90. The tabs 130 embody
downwardly facing shoulders 136 which engage the bottom edges 138
of the apertures 134 to retain the rear portion of the upper
section 90 onto the lower section 92 of the toilet base. Thus, the
screw 126 and the tabs 130 serve to releasably secure the upper
section 90 of the toilet base to the lower section.
The lower portion of the lower section 92 of the toilet base is
formed by a generally upstanding front wall 140 and generally
upstanding side walls 142. The rear of the base structure 14 is
formed with a vertically extending recess defined by a pair of
upstanding walls 144, only one of such walls being seen in FIG. 3.
The recess formed by the walls 144 opens into the interior of the
base structure 14 whereby the conduit 32 may be connected to an
inlet water line, not shown, exterior of the toilet. The base
structure 14 is provided with a slightly inclined floor 146 which
is integral with the lower front wall 140 and side walls 142. The
floor is formed with a pair of spaced concentric cylindrical walls
148 and 150 joined by an annular section 152. The inner wall 148
defines a central aperture which is coaxial with the discharge
outlet 22 of the bowl. The lower end 154 of the valve outlet 27
extends into the aperture 148. An O-ring 156 is disposed between
the outer surface of the outlet 27 and an upstanding cylindrical
wall 158 formed on the annular section 152 of the floor 146. A
second resilient sealing ring 160 is disposed between the annular
section 152 of the floor and a flange 161 on the sewer drain 28.
The lower section of the base structure 14 is fixedly mounted to
the floor support 12 by means of a pair of bolts 162 as best seen
in FIGS. 2 and 5. The bolts extend through apertures 164 formed in
the flange 161 on the sewer drain and through bosses 168 formed on
the annular section 152 of the floor 146 of the toilet base. A nut
170 is threadably engaged on the upper end of each bolt 162 to
firmly hold the base structure 14 on the support 12.
Three hollow bosses 172 extend upwardly from the annular section
152 of the toilet floor 146. The housing 66 of the flush valve
assembly 24 is supported by the upper ends of the bosses 172. The
bowl 16 is mounted on top of the housing 66. Screws 174 extending
upwardly through the upper ends of the bosses 172 pass through
openings 176 in the housing 66. These screws are threadably engaged
in corresponding downwardly extending projections 178 formed on the
bottom of the toilet bowl 16.
To mount the toilet 10 on the support 12, the valve assembly 24 and
the bowl 16 are mounted on top of the bosses 172 as seen in FIG. 3
and an elongated screw driver is extended upwardly through the
hollow bosses to drive the screws 174 into the projections 178 on
the bowl to firmly secure the bowl and valve assembly 24 to the
lower section 92 of the toilet base. The lower section 92 is then
mounted on the floor support 12 so that the floor bolts 162 extend
upwardly through the bosses 168 on the toilet floor 146. The
operator then threads the nuts 170 on the floor bolts 162 through
the upper open portion of the lower section 92 of the toilet. After
the lower section is firmly secured to the support 12, the upper
section 90 is positioned on top of the lower section 92 of the
toilet. By pressing the upper section 90 onto the lower section 92,
the tabs 130 will become engaged within the apertures 134 in the
upper section so that the rear wall 94 of the upper section will be
frictionally retained on the rear portion 132 of the lower section
of the toilet. Thereafter, the screw 126 is inserted upwardly
through the hollow boss 120 and threaded into the downwardly
extending projection 124 on the upper section 90. Thus, it will be
appreciated that when it is desired to perform any repairs or
replace any parts within the interior of the toilet 10, the upper
section 90 is removed by simply removing the single screw 126 at
the front of the toilet, and the upper section may be removed to
provide access to the interior of the toilet base 14. Therefore, by
the construction of the toilet 10 of the present invention, it is
not necessary to remove the toilet base from the floor support 12
when it is desired to perform some operation within the interior of
the toilet. In addition, it is not necessary to disconnect the
conduit 32 from the water inlet line. Thus, repair and maintenance
of the toilet is greatly facilitated. In addition, because the
toilet is mounted on the support 12 through the interior of the
toilet, outwardly extending mounting flanges on the base of the
toilet are not required. Also, only a single small opening 66 is
required in the side wall of the toilet through which the operating
lever 62 extends. As a consequence, there are no enlarged openings
in the front or side walls of the toilet through which water or
urine could enter into the interior of the toilet to cause
contamination or rusting of the nuts and bolts at the floor 146 of
the toilet.
Referring again to the flush valve assembly 24, the valve housing
66 is formed with a circular port 180 adjacent the discharge outlet
22. A lip 182 extends downwardly and radially inwardly from the
surface of the port 180, providing a downwardly facing annular
valve seat 184. A resilient sealing ring 186, formed of rubber or
the like, is slidably mounted in the port 180. The lower portion
188 of the ring 186 flares radially inwardly to seat upon the lip
182. The bottom edge 190 of the sealing ring 186 extends below the
valve seat 184 to sealingly engage with the upper surface of the
gate valve blade 26. An upstanding short cylindrical wall 192
surrounds and is spaced outwardly from the port 180. An upwardly
facing annular ledge 194 joins the surface of the port 180 to the
wall 192. An annular groove 196 opens at the bottom of the
discharge outlet of the bowl 16 and receives the upper portion of
the sealing ring 186. A downwardly facing annular shoulder 198 at
the bottom of the discharge outlet rests upon the ledge 194 on the
valve housing. Thus, the seal 186 serves a double function of both
a valve seal and a toilet bowl gasket. The seal may be readily
replaced by simply removing the bowl 16 from the valve assembly 24
after the toilet base 14 has been removed from the support 12.
Therefore, it is not necessary that the valve assembly be
disassembled to replace the valve seal, thus avoiding the necessity
of the user contacting waste material which may reside within the
interior of the valve housing.
* * * * *