U.S. patent application number 10/658790 was filed with the patent office on 2005-03-10 for toilet ventilation system and method.
Invention is credited to Thomas, Kirk M..
Application Number | 20050050621 10/658790 |
Document ID | / |
Family ID | 34226850 |
Filed Date | 2005-03-10 |
United States Patent
Application |
20050050621 |
Kind Code |
A1 |
Thomas, Kirk M. |
March 10, 2005 |
Toilet ventilation system and method
Abstract
A toilet ventilation system includes a flush toilet having a
toilet bowl portion including a perimeter wall enclosing an
interior of the bowl. A bowl vent inlet extends through a side of
the perimeter wall from the interior to the exterior of the bowl at
a position above a static water level in the bowl. The bowl vent
inlet has an exterior end configured to connect to a vent conduit
for drawing odors out of the toilet bowl.
Inventors: |
Thomas, Kirk M.; (Ketchikan,
AK) |
Correspondence
Address: |
David R. McKinney
THORPE NORTH & WESTERN, LLP
P.O. Box 1219
Sandy
UT
84091-1219
US
|
Family ID: |
34226850 |
Appl. No.: |
10/658790 |
Filed: |
September 8, 2003 |
Current U.S.
Class: |
4/216 |
Current CPC
Class: |
E03D 9/052 20130101 |
Class at
Publication: |
004/216 |
International
Class: |
E03D 009/04 |
Claims
What is claimed is:
1. A flush toilet, comprising: a) a toilet bowl, having a perimeter
wall enclosing an interior of the bowl, and a static water level;
and b) a bowl vent inlet, extending through a side of the perimeter
wall from the interior of the bowl to an exterior of the bowl at a
position above the static water level, the bowl vent inlet having
an exterior end configured to connect to a vent conduit.
2. A flush toilet in accordance with claim 1, further comprising a
turned-down end on the bowl vent inlet, so as to resist the
entrance of water into the bowl vent inlet.
3. A flush toilet in accordance with claim 1, wherein the toilet
bowl portion further comprises a flush high water level, and the
bowl vent inlet is disposed above the flush high water level.
4. A flush toilet in accordance with claim 1, wherein the flush
toilet is of ceramic material, and the bowl vent inlet is
integrally formed of the ceramic material.
5. A flush toilet in accordance with claim 1, wherein the flush
toilet is of ceramic material, and the bowl vent inlet is disposed
in an aperture in the ceramic material.
6. A flush toilet in accordance with claim 5, wherein the bowl vent
inlet comprises an insert configured to insert through and be
anchored in the aperture.
7. A flush toilet in accordance with claim 1, further comprising a
vent conduit, configured to be connected to the exterior end of the
bowl vent inlet, and to extend to an exterior of a building housing
the toilet.
8. A flush toilet in accordance with claim 7, further comprising a
fan, configured to draw air from the toilet bowl through the vent
conduit.
9. A toilet ventilation system, comprising: a) an air vent pipe,
extending through a wall of a toilet bowl of a toilet in a
building; b) a vent pipe outlet, in fluid communication with the
air vent pipe, and extending outside the building; and c) a fan,
configured to draw air from the toilet bowl through the air vent
pipe, and to discharge the air through the vent pipe outlet.
10. A toilet ventilation system in accordance with claim 9, further
comprising a vent pipe inlet, disposed on the air vent pipe inside
the toilet bowl.
11. A toilet ventilation system in accordance with claim 10,
wherein the vent pipe inlet is turned down, so as to resist the
entrance of water into the vent pipe.
12. A toilet ventilation system in accordance with claim 9, wherein
the fan is an electric fan.
13. A toilet ventilation system in accordance with claim 12,
wherein the fan is an axial flow fan disposed in the air vent
pipe.
14. A toilet ventilation system in accordance with claim 12,
further comprising an electric switch for activating the fan.
15. A toilet ventilation system in accordance with claim 9, further
comprising a room vent fan, disposed in the building near the
toilet, having a fan vent outlet connected to the vent pipe outlet,
and configured such that air drawn from the room may be discharged
in concert with the air drawn from the toilet bowl.
16. A toilet ventilation system in accordance with claim 15, for
comprising an electric switch configured to simultaneously activate
both the fan and the room vent fan.
17. A toilet ventilation system in accordance with claim 9, further
comprising a sewer vent associated with the toilet and extending
outside the building, the vent pipe outlet being connected to the
sewer vent, and configured such that the air drawn from the toilet
bowl is discharged into the sewer vent.
18. A method for providing a ventilation system for a flush toilet
having a toilet bowl, comprising the steps of: a) providing a
toilet bowl inlet in an interior of the toilet bowl; b) connecting
the toilet bowl inlet to a vent conduit; c) drawing air from the
interior of the toilet bowl through the vent conduit to a discharge
location outside of a building where the toilet is located.
19. A method in accordance with claim 18, wherein the step of
providing a toilet bowl inlet comprises providing a turned-down end
on the inlet in the interior of the toilet bowl, so as to resist
water entering the inlet.
20. A method in accordance with claim 18, wherein the step of
providing a toilet bowl inlet comprises the steps of: d) forming an
aperture in a wall of an existing toilet bowl; and e) disposing an
insert conduit through the aperture so as to extend from the
interior of the toilet bowl to an exterior thereof.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to systems for
ventilating toilet odors.
[0003] 2. Related Art
[0004] Toilet odors can be a great bother and nuisance. A home or
other building that is kept to very high standards of cleanliness
can still smell foul due to toilet odors. Unfortunately, typical
bathroom exhaust fans are only minimally effective at removing
these odors. This may be because such fans pump a relatively small
volume of air, and are typically located in a bathroom ceiling,
substantially removed from the source of the odors. The long
distance and small flow rate of air through the fan mean that a
relatively long time is needed for bathroom exhaust fans to have a
significant effect. During this time, the odors can easily drift
into other parts of the building. Moreover, some bathroom fans are
not actually connected to an external exhaust outlet. Such fans
merely stir the air in the room, and have very little effect in
eliminating odors.
[0005] To provide better ventilation, a number of toilet
ventilation systems have been developed. Unfortunately, many prior
systems have a number of drawbacks. Many of them are quite
complicated, with complex piping schemes, pumps, filters, drains,
etc. Some of these systems draw odors through conduits in the
toilet tank, while others require a specially designed toilet seat
with vent inlets. Other systems attempt to mask odors with
deodorants, filters, and the like. These and other systems include
components that must be replaced on a regular basis, creating a
maintenance headache.
SUMMARY OF THE INVENTION
[0006] It has been recognized that it would be advantageous to
develop a toilet ventilation system that is simple and inexpensive,
and does not require significant maintenance, and that effectively
draws odors away from a bathroom toilet.
[0007] In one aspect, the invention provides a flush toilet,
including a toilet bowl portion including a perimeter wall
enclosing an interior of the bowl. A bowl vent inlet extends
through a side of the perimeter wall from the interior to the
exterior of the bowl at a position above a static water level in
the bowl. The bowl vent inlet has an exterior end configured to
connect to a vent conduit.
[0008] In accordance with another aspect thereof, the invention
provides a toilet ventilation system for a toilet in a building.
The system includes an air vent pipe, and a fan. The air vent pipe
extends through a wall of a toilet bowl of the toilet and connects
to a vent pipe outlet extending outside the building. The fan is
configured to draw air from the toilet bowl through the air vent
pipe, and to discharge the air through the vent pipe outlet.
[0009] In accordance with yet another aspect thereof, the invention
provides method for ventilating a flush toilet having a toilet
bowl. The method includes the steps of providing a toilet bowl
inlet in an interior of the toilet bowl, connecting the toilet bowl
inlet to a vent conduit, and drawing air from the interior of the
toilet bowl through the vent conduit to a discharge location
outside of a building where the toilet is located.
[0010] Additional features and advantages of the invention will be
apparent from the detailed description which follows, taken in
conjunction with the accompanying drawings, which together
illustrate, by way of example, features of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a perspective view of one embodiment of a toilet
configured to be connected to a ventilation system in accordance
with the present invention.
[0012] FIG. 2 is an elevation view of one embodiment of a toilet
ventilation system according to the present invention.
[0013] FIG. 3 is an elevation view of an alternative toilet
ventilation system according to the present invention.
[0014] FIG. 4 is an elevation view of another alternative toilet
ventilation system according to the present invention.
[0015] FIG. 5 is an elevation view of yet another alternative
embodiment of a toilet ventilation system according to the present
invention.
[0016] FIG. 6a is a cross-sectional view of one embodiment of the
sidewall of the toilet bowl of FIG. 1, wherein the vent inlet is
integrally formed with the toilet bowl.
[0017] FIG. 6b is a cross-sectional view of another embodiment of
the sidewall of the toilet bowl of FIG. 1 wherein the vent inlet
comprises an insert extending through an aperture in the toilet
bowl.
DETAILED DESCRIPTION
[0018] Reference will now be made to the exemplary embodiments
illustrated in the drawings, and specific language will be used
herein to describe the same. It will nevertheless be understood
that no limitation of the scope of the invention is thereby
intended. Alterations and further modifications of the inventive
features illustrated herein, and additional applications of the
principles of the inventions as illustrated herein, which would
occur to one skilled in the relevant art and having possession of
this disclosure, are to be considered within the scope of the
invention.
[0019] The present invention provides a toilet ventilation system
configured for use with a specially configured flush toilet 10,
shown in FIGS. 1 and 2. While the toilet shown includes a tank
portion 12, and a toilet bowl portion 14, disposed below the tank
portion, it will be apparent that the invention can be used with
tankless toilets--i.e. those using a pressurized flush valve, such
as are found in most public most public restrooms today. The toilet
bowl includes a perimeter wall 16 enclosing an interior region 18
of the bowl. Extending through the perimeter wall from the interior
of the bowl to the exterior of the bowl is a bowl vent inlet 20. As
depicted in FIG. 1, the bowl vent inlet may be disposed near the
rear of the toilet bowl. It will be apparent, however, that the
bowl vent inlet could be positioned in many locations.
[0020] The bowl vent inlet 20 is connected to an air vent pipe,
indicated generally at 22, which extends into a wall 24 of the
building 26 that houses the toilet, and extends to an outlet 28
outside the building. An electric fan 30 is provided to draw air
from the interior 18 of the toilet bowl through the air vent pipe,
and to discharge the air through the vent pipe outlet 28. A variety
of types of fans could be used, such as axial flow fans,
centrifugal fans, etc. A conventional bathroom ceiling fan could
also be configured for use in the invention, with the appropriate
conduit and fittings. The inventor has found that a fan having a
flow rate of 50 cfm (cubic feet per minute) is suitable for this
invention.
[0021] The system can be configured in a number of ways, as
depicted in FIGS. 2-4. In the embodiment of FIG. 2, the vent pipe
22 extends directly to the outside of the building 26, with the fan
30 disposed in-line with the vent pipe. An electric switch 32 is
positioned near the toilet and operatively coupled to the fan to
allow a user to activate the fan. This switch may be a simple
toggle switch, as shown in FIG. 2, or it may be a timer switch 34,
as shown in FIG. 3, or any other suitable electric switch.
[0022] In the embodiment of FIG. 3, the toilet ventilation system
is combined with a room ventilation system. In this embodiment, the
vent pipe 22 extends into the attic 36 of the building 26, where it
meets a room vent conduit 38 extending upward from the ceiling of
the room housing the toilet. Air from both the vent pipe and the
room vent conduit are drawn through the fan 30a, and discharged out
of the building through the vent pipe outlet 28a. The embodiment of
FIG. 4 is similar to that of FIG. 3, except that the room vent
conduit 38a extends from a room vent fan 40. The timer switch 34a
controls both the fan 30a and the room vent fan 40.
[0023] In another embodiment, shown in FIG. 5, the vent pipe 22 is
connected to a sewer vent pipe 42 having an outlet 28b. This sewer
vent pipe may be a sewer vent pipe associated with the toilet 10,
or may be another sewer vent pipe in the building 26. Such sewer
vents are well known, and are generally associated with sewer
drains of all kinds. With respect to the sewer vent pipe, the
representation of FIG. 5 is partially schematic in nature. The
position of this pipe is not necessarily as shown. The fan 30b is
disposed in the line of the vent pipe, and pumps air drawn from the
interior 18 of the toilet bowl into the sewer vent for discharge
outside, as controlled by the switch 32a. This embodiment may also
include a one-way valve 44 which prevents sewer odors from entering
the vent pipe when the fan is not activated.
[0024] Cross-sectional views of two alternative configurations of
the toilet bowl wall 16 and the bowl vent inlet 20 are shown in
FIGS. 6a and 6b. In one embodiment, shown in FIG. 6a, the vent
inlet 20a is integrally formed as part of the toilet bowl wall 16.
Toilets are typically formed of ceramic material, and in this
embodiment, the vent inlet is integrally formed of the ceramic
material of the toilet bowl. In another embodiment, shown in FIG.
6b, the bowl vent inlet 20b comprises an insert that is a separate
piece of conduit 46 that extends through an aperture 48 in the
perimeter wall. Sealant 50 and an external cover plate 52 may be
used to provide a water tight seal between the conduit and the
toilet bowl wall, and to provide a neat appearance on the
outside.
[0025] The embodiment of FIG. 6b could be configured in many ways.
For example, the toilet 10 is typically formed of ceramic material,
with the aperture 48 formed in the ceramic material. The conduit 46
that goes into the aperture could be formed of a variety of
materials. For example, it could be a short section of polymer
tubing, such as ABS, PVC, etc., which is inserted into the aperture
and anchored and sealed in place. Alternatively, the conduit could
be a separate section of ceramic conduit (i.e. of the same material
as the toilet) that is inserted into the aperture and anchored and
sealed into place.
[0026] The alternative configurations shown in FIGS. 6a and 6b
demonstrate that there are different methods whereby this type of
toilet ventilation system may be installed. For example, the
embodiment of FIG. 6a relates to a specially configured toilet that
is manufactured with the bowl vent inlet 20 integrally formed in
the toilet bowl wall 16. However, the embodiment of FIG. 6b could
either represent a toilet as-manufactured, or could be a retrofit
system. For example, an existing toilet could be retrofitted for a
ventilation system according to the invention by having the
aperture 48 drilled or otherwise formed in the toilet bowl wall,
and the vent inlet conduit 46 placed through the aperture. The vent
inlet could then be connected to the vent pipe 22 in any of the
various embodiments disclosed herein. Alternatively, the aperture
could be formed during manufacture of the toilet, with the vent
inlet conduit anchored and sealed in the aperture also at the time
of manufacture.
[0027] The bowl vent inlet 20 also includes an exterior end 54 that
is configured to connect to the vent pipe 22 (FIG. 1). As shown in
FIG. 6b, the exterior end of the inlet conduit may include an
annular retaining rib 56, configured to help hold and seal the end
of the inlet to the vent pipe when connected. To accommodate any
slight misalignment of the toilet bowl inlet 20 and the vent pipe
22, a section of flexible conduit 58 may be provided to connect
them, as shown in FIGS. 1-5. This simplifies the installation of
the system, particularly where the toilet ventilation system is
retrofitted to an existing toilet in an existing building.
[0028] The end of the vent inlet 20 within the interior 18 of the
toilet bowl includes a turned-down end 60, which helps to resist
the entrance of water into the bowl vent inlet. As shown in FIGS.
6a and 6b, the turned-down end can comprise an integral end of the
vent inlet. Alternatively, the vent conduit could be substantially
straight, with the turned-down end comprising an elbow that is
attached to the end of the vent inlet in the interior of the toilet
bowl.
[0029] Viewing FIGS. 1, 6a, and 6b, within the toilet bowl is a
static water level 62. This represents the natural level of the
water in the toilet bowl when not in use. The preferred location of
the vent inlet 20 is below the rim 64 of the toilet bowl, and above
the static water level. More preferably, the inlet is disposed
above the flush high water level 66, which represents the level to
which the water will normally rise when the toilet is flushed.
These elevations help prevent water from entering the vent inlet
during normal use of the toilet. It is also desirable to orient the
portion of the vent pipe 22 that extends from the toilet bowl wall
to the building wall at a slight downward angle, as shown in FIGS.
2-5, so that any water that does happen to enter the vent pipe
(such as if the toilet becomes backed-up) will naturally drain out
when the vent inlet is clear.
[0030] The invention thus presents a specially-configured toilet
and a toilet ventilation system for removing odors from the bowl of
the toilet. The system includes a vent pipe that extends through
the wall of the toilet bowl and has an inlet therein, and a fan in
the line of the vent pipe to draw air therethrough to discharge
toilet odors through an outlet outside the building where the
toilet is located. The vent fan may be a separate fan solely for
the toilet ventilation system, or it may be associated with a
system that also ventilates the bathroom as a whole.
[0031] It is to be understood that the above-referenced
arrangements are illustrative of the application for the principles
of the present invention. Numerous modifications and alternative
arrangements can be devised without departing from the spirit and
scope of the present invention while the present invention has been
shown in the drawings and described above in connection with the
exemplary embodiments(s) of the invention. It will be apparent to
those of ordinary skill in the art that numerous modifications can
be made without departing from the principles and concepts of the
invention as set forth in the claims.
* * * * *