U.S. patent application number 13/028077 was filed with the patent office on 2012-01-19 for plungers and devices for storing plumbing tools.
This patent application is currently assigned to SMART PRODUCTS AND INVENTIONS, INC.. Invention is credited to Josh P. DEFOSSET, H. Lee HOLDEN, Francois P. NGUYEN.
Application Number | 20120012136 13/028077 |
Document ID | / |
Family ID | 37024536 |
Filed Date | 2012-01-19 |
United States Patent
Application |
20120012136 |
Kind Code |
A1 |
NGUYEN; Francois P. ; et
al. |
January 19, 2012 |
PLUNGERS AND DEVICES FOR STORING PLUMBING TOOLS
Abstract
A plunger that operates by a piston to drive a purging flow at
relatively high pressure is disclosed. The plunger includes
features so that the exterior of the plunger remains in a dry and
sanitary condition. An optional storage unit is also disclosed
where the storage unit includes at least one UV element. Where the
UV element decreases the amount of pathogens on the plumbing
tool.
Inventors: |
NGUYEN; Francois P.; (San
Francisco, CA) ; DEFOSSET; Josh P.; (Boulder Creek,
CA) ; HOLDEN; H. Lee; (Los Gatos, CA) |
Assignee: |
SMART PRODUCTS AND INVENTIONS,
INC.
Los Gatos
CA
|
Family ID: |
37024536 |
Appl. No.: |
13/028077 |
Filed: |
February 15, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
11386256 |
Mar 21, 2006 |
7908681 |
|
|
13028077 |
|
|
|
|
60664102 |
Mar 22, 2005 |
|
|
|
Current U.S.
Class: |
134/22.12 ;
4/255.11 |
Current CPC
Class: |
E03C 1/308 20130101;
A61L 2/10 20130101; A47K 17/00 20130101; E03D 9/00 20130101 |
Class at
Publication: |
134/22.12 ;
4/255.11 |
International
Class: |
B08B 9/032 20060101
B08B009/032; E03D 9/00 20060101 E03D009/00 |
Claims
1.-70. (canceled)
71. A method of clearing an obstruction from a toilet, said method
comprising: positioning a distal end of a plunger in a source of
liquid; drawing liquid from the liquid source into the inner
member; positioning the inner member over an outlet of a toilet;
and forcing the liquid from the inner member and into the outlet,
drawing liquid into the inner member again without liquid
contacting the exterior surface of the plunger.
72. The method of claim 71, wherein liquid escaping past a seal
flows through an interior portion of the plunger.
73. A kit comprising: at least one of a plunger and a plumbing
tool; and a UV sterilization unit according to claim 1 for
sterilizing the plunger or the toilet brush.
74. The kit of claim 1, wherein the plumbing tool comprises a
plunger body comprising an upper body portion and a lower body
portion, where the upper body portion includes a handle and a
gripping section; a reservoir located within the plunger body and
terminating at an opening in the lower body portion, where the
opening is adapted to direct fluid into the drain; a piston
slidably moveable in the reservoir, such that movement of the
piston displaces fluid from a first reservoir portion to a second
reservoir portion, where the second reservoir portion comprises at
least one port in the lower body portion allowing liquid in the
second reservoir portion to exit the plunger body at a location
away from the upper body portion; and a compliant member located
adjacent to the opening, where the compliant member is sufficiently
compliant to form a seal between the lower body portion and the
drain allowing fluid to be drawn into the first reservoir portion
via the opening.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 11/386,256, filed Mar. 21, 2006, which claims the benefit of
U.S. Provisional Application No. 60/664,102, filed on Mar. 22,
2005, the contents of which are incorporated herein by reference in
their entirety.
BACKGROUND OF THE INVENTION
[0002] A variety of tools have been developed for use in clearing
an obstruction from a toilet, sink, and the like. For example, the
most commonly used toilet plungers are relatively simple devices
that are designed for non-professional plumbers. These simplistic
plungers generally include a dome-like force cup with a rod
attached thereto. The force cup is brought into contact with a
drain outlet and pushed down by the rod to create pressure against
the clog. While simple to use and relatively inexpensive, these
types of toilet plungers have several drawbacks. Use of these
plungers usually results in water and/or waste splashing out of the
toilet to the surrounding area during use. In addition to requiring
inconvenient additional clean-up, resulting contact of the toilet's
contents with the user is unsanitary and may pose health risks.
Furthermore, these common plungers often require a significant
amount of physical effort by the user and often (either because of
the user or design) are not effective.
[0003] Other devices utilize water pressure to dislodge toilet
obstructions. For example, U.S. Pat. No. 4,768,237 discloses a
toilet plunger having a conventional suction cup and handle. The
handle of the device includes a connection for the supply of
pressurized water deliverable to the clogged toilet outlet. U.S.
Pat. No. 4,238,860 discloses a device that includes a pressurized
water receiving-cup and a fitting to be secured within the outlet
as water is passed therethrough. These water pressure devices are
generally positioned in a sealing engagement with the outlet duct
opening so as to rely on a general build up of pressure between the
device and the obstruction to dislodge the obstruction. These
devices also present a risk that water and other waste in the
toilet bowl will splash on the user and surrounding area.
[0004] U.S. Pat. No. 2,697,842 discloses a combination hand and air
force pressure pump and plunger. This device uses a complex
arrangement of valves and conduits for causing a pressure
differential at the drain clog. The plunger can be reversed on the
base stem of the pump and a flexible hose extends therefrom.
However, when used as hand plunger, the device is subject to many
of the same disadvantages noted above, e.g., toilet contents such
as water/waste contacting the user and using the force pressure
mode requires a hook-up to an external pressurized air source.
Furthermore, the device includes a piston having a felt or leather
piston member making it unsuitable for contacting liquid to which
it may be exposed. For example, felt or leather pistons do not
easily dry-out, easily degrade upon water contact and may provide
an environment for microbial growth.
[0005] Toilet plungers, toilet brushes, and similar cleaning
devices are commonly known since little substantive change has
taken place in this industry since the first crude plungers and
brushes arrived on the market. Furthermore, conventional products
do not provide high-end toilet brushes and plungers that bring
design, value and most importantly, sanitization to the bathroom.
Pathogens (including bacteria and viruses) found in the bathroom
(or other areas where plungers/brushes are used) cause serious
health problems, and in extreme cases, can even cause death.
Conventional methods for keeping these areas sanitized were limited
to cleansing chemicals. Such chemicals pose a risk to occupants and
also, ultimately, to the environment.
[0006] These conventional cleaning devices do not address health
concerns, as they have no convenient sterilization capability.
Often, storage of these products occurs in a damp, dark environment
such as a container or the corner of the room. If contaminated, the
brush, plunger, or other cleaning device becomes a breeding ground
for viruses and bacteria and many other pathogens. Toddlers,
children, pets, as well as adults, who come in contact with these
plungers are exposed to the pathogens and risk becoming sick or
carriers of the pathogens. The problem is exacerbated in public-use
areas such as hospitals, restaurants, dormitories, hotels, and even
nursing homes.
[0007] The introduction of products with disposable cleaning ends
(such as disposable toilet brushes) is one attempt to address this
sterilization and cleanliness issue. For example, SC Johnson's
Scrubbing Bubbles Fresh Brush, Clorox's Toilet Wand and Scotch
Brite's Disposable Scrubbers are products aimed at reducing
contamination. However, aside from the increased cost burden, these
products still require a non-disposable component (such as a shaft,
handle, arm, body, etc.), that may serve as a breeding ground for
such pathogens.
[0008] UV light sterilization is a safe and proven technology that
is widely used in hospitals, air and water purification, food
processing and packaging, medical packaging. UV light sterilization
is also found in toothbrush holders and surface cleaning
sterilizers.
[0009] Ultraviolet (UV) light is part of the light spectrum between
100 and 400 nanometers (nm), just below the violet end of the
visible spectrum. UV technology is a non-chemical approach to
disinfection. In this method of disinfection, no chemicals are
added, which makes this process simple, inexpensive and low
maintenance.
[0010] UV sterilizers use germicidal lamps designed and calculated
to produce a certain dosage of ultraviolet light. The principle of
design is based on a product of time and intensity. Both parameters
require specified levels for successful disinfection.
[0011] Accordingly, there remains to be a need for improved
plumbing related products.
SUMMARY OF THE INVENTION
[0012] The devices and methods described herein are improved means
for handling and storing plumbing-related products, especially
bathroom-related products and plumbing tools. The plumbing tools
may include plungers, toilet brushes, handles for disposable toilet
brushes/plungers, other types of plumbing accessories such as drain
brushes, drain snakes, and other similar type cleaning or clearing
implements.
[0013] One variation of a device provides for a cleaner plumbing
tool that improves clears obstructions in a toilet or other drain
in an improved manner. Another particular feature of the products
and methods described herein is that they increase the ability of
the user to maintain a clean device yet do so in a safe and
effective manner lessening or even eliminating the need for
chemicals.
[0014] It is specifically noted, that products and methods
described herein increase the sanitization aspect of these plumbing
related products and may also sterilize the products. With regards
to sterilization, the products and methods herein may allow for
total sterilization by eliminating the threat from harmful
substances, or, the products and methods may partially sterilize
the products by reducing the amount of harmful substances on the
plumbing related devices.
[0015] The invention includes a plunger for clearing a drain, where
the plunger has a plunger body comprising an upper body portion and
a lower body portion, where the upper body portion includes a
handle and a gripping section, a reservoir located within the
plunger body and terminating at an opening in the lower body
portion, where the opening is adapted to direct fluid into the
drain, a piston slidably moveable in the reservoir, such that
movement of the piston displaces fluid from a first reservoir
portion to a second reservoir portion, where the second reservoir
portion comprises at least one port in the lower body portion
allowing liquid in the second reservoir portion to exit the plunger
body at a location away from the upper body portion, and a
compliant member located adjacent to the opening, where the
compliant member is sufficiently compliant to form a seal between
the lower body portion and the drain allowing fluid to be drawn
into the first reservoir portion via the opening.
[0016] In another variation of the invention, a plunger can include
a first chamber substantially surrounded by a housing and
spaced-apart a distance from an interior surface of the housing,
the chamber comprising a top end and a bottom end, the top end
being substantially open, and a piston movably and sealingly
arranged within the first chamber. A space between a wall of the
first chamber and the interior surface of the housing can define a
second chamber, and where the first and second chamber are in fluid
communication only at a top of the first chamber, such that
material flowing around the piston is forced into the second
chamber.
[0017] The invention also includes a storage unit for sanitizing or
sterilizing a plumbing tool, the unit can include a base adapted to
sealingly hold the plumbing tool, and at least one UV light source
within the base. Variations of the invention include storage units
that sterilize/sanitize with our without rinse cycles.
[0018] The invention also includes methods for clearing
obstructions from a toilet or drain by positioning a distal end of
a plunger in a source of liquid; drawing liquid from the liquid
source into the inner member (e.g., the reservoir); positioning the
inner member over an outlet of a toilet and forming a seal against
the drain; and forcing the liquid from the inner member into the
outlet without undue splashing of the liquid found in the toilet.
The method includes optionally cycling liquid with the plunger
through the drain without breaking the seal. Eventually, the toilet
drains when the seal is removed.
BRIEF DESCRIPTIONS OF THE DRAWINGS
[0019] The figures illustrate exemplary aspects of the invention.
Of these figures:
[0020] FIG. 1A is a view of an variation of a plunger and a
base;
[0021] FIG. 1B is an exploded view of the plunger of FIG. 1A;
[0022] FIG. 1C is an end view of the plunger of FIG. 1A;
[0023] FIG. 1D is an partial section view of an end of a
plunger;
[0024] FIG. 2A is another variation of a plunger;
[0025] FIG. 2B is a cross-sectional view of the plunger of FIG. 2A
taken along lines A-A;
[0026] FIG. 2C shows an enlarged view of a portion of the plunger
of FIG. 2B showing the flow-by path for liquid that gets behind the
piston seal of the plunger; FIG. 2D shows an enlarged view of a
portion of the plunger of FIG. 2C showing the final exit path of
liquid that gets behind the piston seal of the plunger (i.e.,
flow-by liquid);
[0027] FIGS. 3A-3E illustrate various internal components of
variations of plunger under the present invention;
[0028] FIGS. 4A-4C are perspective/assembly view showing a piston
sleeve, plunger rod, upper and lower retaining rings and a piston
of the plunger;
[0029] FIGS. 5A-5C illustrate a variation of the plunger being used
to clear a drain/toilet;
[0030] FIGS. 6A-6C shows a view of a base and plunger;
[0031] FIGS. 7A-7B shows exemplary plunger/toilet brush storage
units according to the present invention where the unit is opened
for insertion of a plumbing tool;
[0032] FIGS. 8A-8B show partial sectional views of storage units
with UV sources for use with plumbing tools;
[0033] FIG. 9A shows a cross sectional view of another variation of
a unit with a side view of a plumbing tool;
[0034] FIG. 9B illustrates an exploded view of the unit of FIG.
9A;
[0035] FIG. 9C illustrates a partial sectional view of a lid of a
plumbing tool as it engages a switch on a base unit;
[0036] FIG. 9D illustrates an exemplary UV lamp and power
supply;
[0037] FIG. 9E illustrates an exploded view of a toilet brush;
and
[0038] FIG. 10 illustrates a flowchart representation of a
variation of the logic flowchart contained on a circuit board for
controlling the unit.
DESCRIPTION
[0039] The subject invention provides devices and methods for
clearing an obstruction from a drainage outlet ("outlet") of a
toilet, sink, washbasin, shower, bath, urinal, and the like.
Although variations of the devices described herein are discussed
primarily for use in clearing an obstruction from a toilet, the
devices and systems are not limited to such a use unless otherwise
discussed. Although the subject plungers described herein work
optimally with its seal engaged under submerged conditions,
variations of the invention may not be required to function in this
manner. Embodiments of the subject invention are described with
reference to FIGS. 1-8C.
[0040] Generally, embodiments of the subject plunger are
constructed to prevent contents of the toilet (water, waste,
obstruction particulates, etc.), from contacting the exterior
surface of the plunger when the plunger is used to dislodge or
break-up an obstruction in a toilet, thereby preventing liquid from
coming in contact with the user of the plunger--especially the
user's hands when using the plunger.
[0041] FIG. 1A illustrates a variation of a plunger assembly 100
according to the present invention. As illustrated, the plunger
assembly or device 100 includes a handle 108, a neck portion, and a
compliant member 112. Typically the plunger 100 will comprise a
handle 108 and a gripping section. In the variation of FIG. 1A, the
gripping section may comprise a neck portion 110 such that the
handle 108 and gripping portion are on the upper part of the
plunger body. However, variations of the plunger 100 include a
gripping portion that is found on a lower part of the plunger
body.
[0042] The compliant member 112 is sufficiently compliable and/or
conformable to permit formation of a seal between the plunger 100
and drain and/or toilet. A full or partial seal allows the plunger
100 to intake and exhaust fluids to clear any obstructions. The
compliant member 112 for use with the devices described herein may
be resiliently deformable members such as a soft, pliable double
wall gasket such as an elastomeric gasket. The compliant member 112
can be conformable to the bottom or liquid dispensing end of the
plunger and adapted to sealingly engage the opening of a the toilet
outlet or drain. The gasket thus provides a flexible member that
may form a seal against a variety of toilet bowl shapes and is
adapted to allow a distal plunger location for flow-by liquid to
discharge from the plunger (into the bowl during use or into the
base if it has not fully drained when it is put away).
[0043] The gaskets may be double walled gaskets. As shown herein,
the gasket may connect to the housing wall to form a double lap
joint and to the sleeve wall to form a single lap joint, as well as
being adapted to be permissive of liquid flow therethrough.
[0044] The gasket can include at least one through hole by which
liquid (from within the chamber and/or from the flow-by path) is
dispensed from the plunger to the drain. In certain embodiments, a
gasket includes at least one liquid dispensing opening in
communication with the interior of the sleeve and at least one
liquid dispensing opening in communication with a flow-by path.
[0045] As noted above, in the variation of FIG. 1A, the upper
portion of the plunger 100 comprises the handle 108 and neck
portion 110. Where the neck portion 108 is convenient for the user
to grip when using the plunger 100. Although not shown, variations
of the invention include a handle 108 and/or neck portion 110
having a handle grip type configuration to allow for the user to
apply greater force when using the plunger 100. The lower body
portion generally includes the compliant member 112 and the part of
the plunger 100 containing a reservoir (not shown in FIG. 1A).
Again, variations of the plunger 100 include the gripping portion
located on the lower body portion.
[0046] The system described herein may include base 200, where the
lower body portion nests within the base 200 when not in use. As
shown, the base 200 may include drain openings 202 to allow any
liquids to drain from the plunger 100 when in storage.
[0047] FIG. 1B illustrates an exploded view of the plunger device
100. As shown, the piston 106 is slidably located within a
reservoir portion or first chamber 102. The piston 106 is coupled
to a shaft 114. The shaft 114 terminates in a handle 108. This
configuration allows an operator to grasp the neck portion 110 and
handle 108 to actuate the plunger device 100 while allowing the
working end of the device 100 to direct fluid. As illustrated, the
neck portion 110 may contain ribs to increase its column strength.
Alternatively, the neck portion may be solid. Variations of the
device 100 include at least two shells that form the body of the
device 100. Alternatively, the plunger device 100 may be a single
uniform piece of material. In any case, plugs may be used to fill
any openings (caused by fastening members) in the external portion
of the plunger body.
[0048] As discussed below, the internal surfaces of the plunger
assembly 100 may be reflective such that UV light is reflected
within the reservoir to assist in sterilizing the plunger.
Alternatively, or in combination, a UV light source or other
sterilization source, may be placed within the reservoir or housing
of the plunger. In such cases, a power supply will be coupled to
the plunger (either through a coupling in the base, a battery
operated system in the plunger body, or an external plug or
charging source. Furthermore, a photocatalyst may be provided with
the plunger. For example, the photocatalyst may be provided in the
material forming the plunger parts. Alternatively, or in
combination, the photocatalyst may be provided as a separate insert
that is placed within the plunger. In any case, the photocatalyst
will be placed within a line-of-sight of the UV light source and/or
it will be placed such that UV light shines onto and activates the
catalyst.
[0049] FIG. 1B also shows the plunger 100 including a reservoir for
displacement of fluids (where fluids include gas and liquids). The
reservoir is generally divided into a first reservoir portion 102
or first chamber 102 and a second reservoir portion 104 or second
chamber 104. The reservoir, usually the first reservoir portion 102
terminates at an opening 118 in the lower body portion, where the
opening is adapted to direct fluid into the drain. The piston 106
is slidably moveable in the reservoir, such that movement of the
piston displaces fluid from the first reservoir portion 102 to the
second reservoir portion 104. The second reservoir portion 104
comprises at least one port 120 in the lower body portion allowing
liquid in the second reservoir portion 104 to exit the plunger 100
body at a location away from the upper body portion. This assists
in preventing fluid wastes from the plunger 100 from contacting the
user's hands.
[0050] In the variation of FIG. 1B, the first and second reservoir
portions 102, 104 are separated by a wall 116. The wall 116 spaces
the first reservoir portion 102 from the body of the plunger. The
spacing may then form the second reservoir portion 104. To permit
fluid flow between the reservoir portions, the wall can be open at
the top of the reservoir portions 102, 104 to allow for fluids to
be displaced between reservoir portions 102, 104. For example, when
the piston moves from the bottom of the plunger to the top of the
first reservoir portion, air in the first reservoir portion
displaces into the second reservoir portion. It is noted that any
liquid may also move to the second reservoir portion without
contacting the user or exterior of the plunger. As the piston moves
upward in the plunger body, liquids fill in the first reservoir
portion through the opening 118 in the bottom of the plunger. This
fluid path between reservoir portions 102, 104 is referred to as a
"flow-by path". It should be noted that the wall may have other
openings as well as openings in the top.
[0051] FIG. 1C illustrates a view of the bottom of the plunger 100.
As shown, the opening 118 of the reservoir is adjacent to the
compliant member 112. Some variations of the device 100 may include
a compliant member 112 having a cavity 122 (not shown). In such
cases, the cavity 122 will have cavity openings 124 or apertures
124 to allow fluid to drain from the plunger through the port 120
of the reservoir. Variations of the device 100 include ports that
deliver fluid to an external surface of a lower body portion of the
plunger or even back into the reservoir.
[0052] FIG. 1D illustrates a partial sectional view of the plunger
100 of FIGS. 1A-1B. As shown, the piston 106 is slidably moveable
within the first reservoir portion 102. The shaft 114 passes
through the reservoir and into the neck portion 110. To prevent
liquids form entering the neck portion 110, a shaft opening 115
into the neck portion 110 may have a close tolerance to the shaft
114 and/or a seal may be used. In addition, to allow fluid
communication between reservoir portions 102, 104, one or more
flow-by openings 119 may be used. For example, if the plunger 100
uses a wall 116 to separate reservoir portions 102, 104, then the
wall may have openings 119 as shown. Alternatively, if the first
reservoir portion 102 is defined by a sleeve 126, then the sleeve
may have openings 119 or may have an insert or cap with such
openings 119.
[0053] FIG. 2A illustrates another variation of a plunger 100
according to principles described herein.
[0054] FIG. 2B shows a cross sectional view taken along the lines
A-A of FIG. 2A. As shown, the plunger 100 includes a sleeve 126
defining a first reservoir portion 102 or first chamber 102. Where,
a piston head 106 is moveable in the first chamber 102 and serves
as the mechanism to draw fluid in the assembly 100 and generate
hydraulic pressure to unclog a drain such as a toilet drain or the
like.
[0055] As shown in FIG. 2B, the second reservoir portion 104 or
second chamber 104 is exterior to the first reservoir portion 102
or first chamber 102. As discussed above, the sleeve 126 is open at
the top to allow for a flow-by path between chambers. This permits
confinement of liquid within plunger device.
[0056] FIG. 2C is an expanded view of the balloon 2C from FIG. 2B.
As shown, the double wall construction formed by the sleeve 126
helps confine liquid that may pass behind the piston 106. This
fluid is referred to as "flow-by liquid". The flow-by liquid then
exits the device 100 in a direction away from the user/handle
108.
[0057] FIG. 2D is an expanded view of the balloon 2D from FIG. 2B.
As shown, the port 120 from the second chamber 104 permits flow-by
liquid to enter into a cavity 122 of the compliant member or gasket
112. The flow-by liquid then exits via the aperture 124. In this
manner, the component pieces of the plunger 100 direct liquid to
exit the plunger (e.g., to return to the toilet, or drain into the
base 200) without contacting the exterior surface of the plunger.
As noted above, variations of devices includes aperture and/or
ports that deliver flow-by liquid externally to the body of the
plunger in the lower body portion.
[0058] FIGS. 3A-3E illustrate various internal components of the
plunger 100. FIG. 3A illustrates a variation of a sleeve 126 for
use with a plunger 100. As shown, the sleeve 126 includes mating
portion 128. The mating portions may be threaded portions, have
ridges, or other such features that allow for placement and
securing of the sleeve within the plunger body and (optionally) to
the compliant member or gasket. Typically, the bottom end of the
sleeve allows for liquid to pass into and out of the plunger. The
top end of the sleeve may be adapted to provide substantially
unobstructed flow for flow-by liquid to the flow-by path. The top
end of the sleeve may be substantially, including completely, open,
thereby accommodating a wide volume of liquid that may leak past
the piston/sleeve seal during use of the plunger.
[0059] FIG. 3B illustrates a sleeve 126 being joined to a gasket
112. FIG. 3C illustrates a gasket 112 or compliant member 112. The
gasket may be comprised of a thermoplastic elastomer. As noted
herein, the materials used for the gasket are capable of
cyanoacrylates and epoxies. The materials should be useful for
industrial applications and should be compatible with heavy
alkalis. FIG. 3D shows a variation of a piston 106. The piston 106
may be fabricated from a thermoplastic elastomer, thermoplastic
rubber/resin, polypropylene or any similar material. As shown, the
piston may have a double seal and a flat top. Both `ridgelines` or
seals on on the piston may form an independent seal with the
sleeve. Finally, the top of the piston should not have cavities or
wells in which `flow-by` liquid may collect. However, other
configurations of pistons may also be employed.
[0060] FIG. 3E illustrates a shaft 114. The shaft 114 may be
fabricated from a stiff material such as a steel coated with a
corrosion inhibiting material. Alternatively, the shaft may be
fabricated from a stiff polymer.
[0061] FIG. 4A-4C illustrates another variation of a set of
internal components. FIG. 4A shows a sleeve 126 that is positioned
in the interior of the housing and maintained in a fixed position
by one or more sleeve-holding members or fixtures 130, 132 which
may be in the form of rings (e.g., rings with perforations to
maintain the flow-by path allowing for passage of flow-by liquid).
For example, an upper retaining ring and/or a lower retaining ring
may be used.
[0062] The sleeve 126 may be spaced a distance apart from the
housing so that spacing between the outer surface of the sleeve and
the inner surface of the housing is provided that defines a liquid
flow-by path for flow-by liquid. Alternatively or in addition, the
sleeve may include external grooves or flow channels for flow-by
liquid. In one variation, the sleeve outer housing and flow
channels may provide an integrated or one-piece structure.
[0063] In any case, spacing between the first reservoir portion 102
(i.e., the piston bore) and housing defines the second reservoir
portion 104 and provides a liquid flow path that is adapted to
receive flow-by liquid and direct the flow-by liquid to the bottom
or dispensing end of the plunger. The flow-by path terminates at
the distal or bottom end of the plunger or another location distal
a user's grip position for return of flow-by liquid to the toilet
bowl without user contact.
[0064] The sleeve 126 with the piston therein provides a chamber
suitably constructed for receiving and holding liquid, until the
liquid dispenses from the reservoir (or chambers) through an outlet
to a toilet, by actuation of the piston. The chamber is designed to
be compatible with substantial liquid contact. In other words, the
chamber is constructed so that it is robust for repeated contact
with liquid (e.g., toilet water, waste, etc.), and does not provide
an environment for fostering microbial growth that may result from
contact with contaminated toilet water.
[0065] The sleeve 126 is typically substantially rigid and
constructed to maintain rigidity upon repeated and prolonged liquid
contact. The sleeve 126 will typically be constructed of material
that is compatible with drain-cleaning liquids, e.g., heavy alkali
drain cleaners. A smooth bore is preferred, so seams should be
avoided. Generally, extruded, pulltruded or cast polymeric material
will suffice. Material of interest include, but are not limited to,
polypropylene, poly(vinyl chloride), and other opaque, stiff,
non-hydrophillic or hydrophobic thermoplastics, preferably one that
is capable of adhesion with epoxies and cyanoacrylates. However,
some choice of materials may be preferable for ease of
manufacturing but such materials may not hold up to the heavy
alkali drain cleaner discussed above. Materials include PVC,
polypropylene or other such materials.
[0066] The piston typically includes a polymeric material. The
piston may be a simple disc or be otherwise suitably configured.
The type of seal required must be one such that the user can easily
actuate the rod or handle attached to the seal. Consequently, the
seal may not be air or liquid tight. Yet, it will generally only
"leak" or allow about 0.001% to about 2% of the liquid it is
driving past its face to pass. Still, either a better or worse seal
may be employed.
[0067] The chamber is configured to hold and dispense a suitable
volume of liquid for the various applications. For example, when
intended for use to unclog a toilet, the chamber may have a liquid
volume capacity (i.e., the volume of liquid that may be displaced
by one stroke) that ranges from about 0.25 to about 2 liters, e.g.,
0.5 to about 1.0 liters. In certain embodiments, the volume of
liquid that may be displaced by one stroke may be as little as
about 0.05 liters, e.g., if a motor is employed as described
below.
[0068] Variations of the device include plungers with housings that
include the sleeve-retaining portions and an elongate neck portion,
wherein the two may differ in shape and/or size. For example, a
sleeve-retaining portion may be in the form of a curved body
portion (e.g., a bulbous portion), which curved body portion
extends into a narrower neck portion that terminates in an opening.
Such features may offer both design appeal as well as improved
ergonomics.
[0069] The neck portion of the housing may be adapted to
accommodate a shaft connected to the piston. The piston shaft may
terminate in a user-contactable handle or knob which may protrude
from the opening of the neck portion of the housing. The handle
and/or neck may be configured to provide an ergonomic holding and
controlling location for the operator of the plunger. An operator
may hold the handle and move it upward and downward to drive the
piston inside the sleeve in a reciprocating manner causing liquid
to be dispensed from the plunger to the toilet outlet.
[0070] Variations of the device may include motor means disposed in
the housing for driving the piston assembly in reciprocating
motion. The motor may be actuated by a manual switch secured to the
housing.
[0071] In another variation of the plunger, a system is provided
that includes a brush portion (not shown) to be received at the
bottom end of the plunger such that a subject plunger may be
configured as a toilet brush. Alternatively, the body of the
plunger may be adapted to accommodate either one of the seal or
brush in an interchangeable fashion.
[0072] When no brush is attached to the plunger body, it may be
received by a base. The base may include a central protuberance to
help capture or stabilize the plunger received thereon. Adjacent
this section, drain holes may be provided to allow fluid that
remains in the plunger body to eventually leak out to accumulate in
a reservoir base. Such a reservoir can be threaded onto or into an
upper portion of the base. A chamber provided by these various
components may be sized to receive a toilet puck, wafer or disk to
aid in odor control.
[0073] Methods according to the invention include loading a plunger
with liquid to be used to hydraulically clear an obstruction.
However, FIGS. 5A-5C illustrate an example of use of a plunger 100
to clear a toilet. In using a subject plunger, downward hydraulic
pressure may be repeatedly applied on an obstruction to dislodge or
break-up the obstruction without contacting the exterior of the
plunger with any liquid that bypasses the piston/sleeve seal of the
device. Use generally includes two successive plunger strokes--a
liquid pickup or loading stroke, followed by a liquid dispensing
stroke. This cycle may be repeated a number of times to address the
issue at hand
[0074] As shown in FIG. 5A, the user positions a bottom end of the
plunger 100 into a drain (in this case the toilet). Next, the
compliant member 112 forms a seal between the body of the plunger
100 and the drain. Alternatively, the bottom end of the plunger is
simply placed within liquid and water is drawn into the reservoir
and then the end of the plunger forms a seal with the drain.
[0075] FIG. 5B shows a pulling motion on the handle 108 while the
operator's hand holds the neck portion. This action draws liquid
into the sleeve by causing the piston to move in a proximal
direction within the reservoir. (i.e., away from the drain
outlet).
[0076] Once loaded, the liquid may then be dispensed from the
plunger with force. FIG. 5C illustrates a downward motion on the
handle 108. Generally, the handle is pulled back and forth, causing
the piston to move within the sleeve to force one or more streams
of liquid from the sleeve and into the drain to dislodge and/or
break-up an obstruction. This action may be repeated one or more
times as needed. In certain embodiments, between about 2 and about
10 successive strokes may be used.
[0077] As discussed above, the use of the structure described above
(including sealing the plunger, and the flow-by paths) prevents
liquid from splashing or otherwise contacting the user's hands.
Furthermore, the device only permits liquid to exit the device
towards the bottom portion to avoid contacting the user.
[0078] FIG. 6A illustrates an example of a base 200 for use with
plungers of the present invention. As shown, the base 200 may
optionally include one or more drain holes 202 to drain liquids
that accumulate after use of the plunger. FIG. 6A also illustrates
one or more optional UV light sources 210 or other sterilization
source. The base 200 may also include a base trap 204 used to
collect any liquids that collect during storage of a plunger. FIG.
6B illustrates a cross sectional view of one example of a base
trap. Variations of the invention may include bases with or without
base traps.
[0079] FIG. 6C illustrates another example of a base 200 use with
plungers 100 of the present invention. As shown, the base 200 may
include one or more UV illumination sources 210 as discussed below.
The UV sources 210 will be placed to sanitize/sterilize portions of
the plunger 100 that come in contact with waste water from the
drain/toilet.
[0080] The subject invention also provides ultraviolet (UV)
sterilization units or base modules for use with plungers and
toilet brushes. Accordingly, a subject UV sterilization unit may be
used to sterilize or sanitize a plunger as described above
(configured with a fluid gasket or with a brush), or any
conventional plunger, toilet brush, and the like. The UV
sterilization units may be used to aseptically store such a device
for a prolonged period of time. Also provided are systems that
include a sterilization unit and at least one of a plunger
(including but not limited to a plunger of the subject invention)
and a toilet brush.
[0081] Ultraviolet light is part of the light spectrum between 100
and 400 nanometers (nm), just below the violet end of the visible
spectrum. Within UVC, wavelengths from 200 nm to 280 nm are known
as the "germicidal range". Specifically, 253.7 nm is generally
accepted as the apex of this range. Germicidal ultraviolet (UVC)
light kills cells by damaging their DNA. The light initiates a
reaction between two molecules of thymine, one of the bases that
make up DNA. UV light at this wavelength (UVC) causes adjacent
thymine molecules on DNA to dimerize. The resulting thymine dimer
is very stable. If enough of these defects accumulate on a
microorganism's DNA its replication is inhibited, thereby rendering
it harmless.
[0082] The principle of design is based on a product of time and
intensity--both levels must be specified for a successful
sterilization. In one variation, the system delivers between
2,500-250,000 mWs/cm2 throughout the enclosure. This expose is
believed to eliminate 95% to 99.9% of E. coli., Staphylococci,
Streptococcus, Influenza, Hepatitis and many other pathogens. In
additional variations of the invention, the container will be
enclosed to protect the user from even the smallest dosage level of
this light. Alternatively, or in combination, the system may
include trigger switching to prevent unintended discharge of the UV
light.
[0083] UVC light may be provided by fluorescent or low
pressure-type bulbs. However, a more desirable source may be LED
type bulbs which can produces ultraviolet light as well as Cold
Cathode Fluorescent Lamps, which are smaller than the old Low
Pressure bulbs. In one variation, the bulbs used deliver 95% of
their energy as 253.7 nm. Systems of the present invention may be
powered either from standard household electrical supply (e.g., 120
VAC). Alternatively, the system may be configured to use standard
DC batteries such as AA, AAA, 9V or even watch batteries. In yet
another variation, a wind-up dynamo (such as those used to power
flashlights or radios) may be employed. Variations of the invention
include devices used with any variation of the UV spectrum
including UV cycles that provide varying ranges or wavelengths of
the UV spectrum.
[0084] FIGS. 7A-7B illustrates variations of storage units as
described herein. The storage unit 250 includes a base 252 where
the bottom portion of the base comprises a skirt 253, having a UV
source (not shown in FIG. 7A or 7B). This variation includes a gate
254 that is moveable to allow insertion and removal of the plumbing
tool 10, 12. Typically, the gate 10 will be coupled to a switch for
the UV source to avoid unintended exposure to the UV energy. The
base can contain or surround a plumbing tool. Typically at least
the distal end or head of the plumbing tool is located within the
base. In additional variations, as much of the handle as is
practical (i.e., a wetted or otherwise contaminated portion) is
also enclosed in the base. The internal surface 262 of the unit 250
may have reflective properties to better distribute the UV energy.
Optionally, the system or unit 250 may include a removable collar
256 that allows retention of a standard plumbing tool 10, 12 with
the unit 250. However, in most variations, the collar 256 is not
removable but integral with the tool. In some cases, a plumbing
tool may be provided with the system, where the plumbing tool
incorporates features to allow nesting of the tool within the
unit.
[0085] FIGS. 8A and 8B illustrate cross sectional views of storage
units 250. In these variations, the base 252 comprises an internal
reflective surface at least in the area housing the plumbing tool
10, 12. Variations of the unit 250 includes the bottom portion of
the base 252 As shown by the arrows, light from the UV light
sources 210 bounces within the unit 250. Any number of UV light
sources may be employed in variations of the devices. Moreover, the
unit may be reflectively coated, or, the unit 250 may contain an
insert that has a reflective coating. In variations of the unit 250
water that accumulates in a mid-wall 255 of the base 252 and
eventually evaporates because of the UV exposure. In such
variations, the base 252 is not in fluid communication with the
interior skirt portion 258 of the unit 250 because the interior
skirt portion 258 houses the electrical components and/or power
supply of the system. Accordingly, the base 252 is sealed from the
interior skirt portion 258 to prevent water seeping into the
interior skirt portion. Typically, a mid-wall 255 separates the
interior of the base 252 from the interior of the skirt 258.
[0086] In some variations, the interior portion of the skirt 258
may serve as a fluid trap 258 (e.g., the mid-wall 255 contains
holes for drainage from the base 252 into the interior skirt
portion 258). The fluid trap 258 collects liquid drainage from the
plumbing tool. Optionally, the fluid trap 258 area may have a
reflective coating to expose the fluid to UV light. Such exposure
may be intended to reduce the pathogens in the drained fluid or to
evaporate the drained fluid. In another variation, the fluid trap
258 may include a secondary source of UV light 212.
[0087] UV sources for use with the present invention include the
following:
[0088] UV-A targeted at just below 380 nm in conjunction with a
photocatalyst (e.g., TiO2). This could be performed with an
inexpensive cold cathode glass bulb or an LED. Available UV-A LED's
include: Roithner Lasertechnik # RLT350-30--peak wavelength of 350
nm, Roithner Lasertechnik # 380D30--380 nm, Roithner Lasertechnik #
HUUV-5102L--393-395 nm, LEDTronics # L200CUV395-12D--395 nm,
Wilycon # WUV503-C395-C--390 nm minimum, 395 nm typical, 400 nm
max, Nichia America, NSHU550E--370 nm, Lumex, part #
SSL-LX5093SUVC. The photocatalyst could be a) mixed into the resin
that is used to injection mold the chamber basin; b) mixed into the
resin used for injection molding of the Handle or Head (of the
Plunger or Brush); c) coated onto the inner surface of the chamber
with a film--this is advantageous as "off the shelf" films may soon
be available allowing for the film to be vacuum formed directly
onto the inside surface of the unit's parts; d) a currently
available solution is sprayed on in a solution and then dried to
coat the entire inside of the unit (see e.g., GreenTekQuest.com).;
and/or coating a high surface area textile like fiberglass cloth
and then die-cut and shape the cloth to line the inside of the
unit.
[0089] Use UV-C targeted to 253 nm with a glass CCFL Bulb. That
this mode requires a) a non-LED bulb, and, b) more power than the
unit described above. As demonstrated by VioLight and Steripen
devices, this mode can still be powered by 4AA or 2 9V to provide
more than 25 sanitization cycles. This mode also produces some
Ozone that will kill some germs.
[0090] Use UV-C targeted to 253 nm with a special doped quartz CCFL
Bulb. This mode is useful for variations of the device in which
Ozone production is avoided.
[0091] Use UV-C targeted to 253 nm with a glass CCFL bulb and
photocatalyst in the chamber. The UV-C provides a primary
sterilization means while the photocatalytic oxidation provides as
a secondary sterilization mans, and Ozone serves as a tertiary
sterilization. Again, while this may mode has drawbacks in size and
production of Ozone, the effectiveness would be quite high and the
cost would be medium.
[0092] Use UV-C targeted to 253 nm with a special doped quartz CCFL
bulb and Photocatalyst in the chamber this would have UV-C as the
primary method of sterilization and photocatalytic oxidation as the
secondary. This mode avoids Ozone production. This mode requires a
quartz CCFL bulb of a sufficient size to fit within the unit.
[0093] In each of the above modes, the photocatalyst could be
provided in the plunger and/or base. Furthermore, the photocatalyst
could be found in the actual housing. Alternatively or in
combination, the photocatalyst could be inserted as a separate
piece.
[0094] FIG. 8A also shows a variation of a plumbing tool 10 (e.g.,
a plunger) having an internal reservoir 14 that is reflectively
coated to aid in UV light distribution. In addition, it is further
noted that the unit may be used with plumbing tools comprising
handles only (e.g., a tool without a plunger cup or brush such as a
disposable head toilet brush provided by, for example, Clorox.RTM.,
SC Johnson, or Scotch-Brite.TM.).
[0095] FIG. 9A shows a cross sectional view of another variation of
a unit 250 with a side view of a plumbing tool 12. As illustrated,
the unit 250 includes a base 252, with a opening 260 for insertion
of the plumbing tool. The unit 250 includes an illumination source
210 having associated circuitry 214 with a power supply 216. In
this variation, the power supply 216 comprises a set of batteries
placed within the unit. However, variations include power supplies
that are external to the unit or plugs for AC power. The unit 250
also includes a reflective interior surface 262 (for example, the
interior surface of the base 252 may be reflective, or an insert
may be used).
[0096] FIG. 9A also shows a plumbing tool 12 in the form of a brush
12. The brush has a brush head or attachment 16 coupled to a shaft
18. The shaft includes a lid 20 that is receivable within or on the
top of the unit 250 and a handle 22. As shown, the unit 250 may be
provided with a standard plug 228 so that the UV source obtains
power from a wall outlet.
[0097] As discussed herein, the unit 250 may also include a
photocatalyst. For example, the photocatalyst may be provided in
the material forming the parts of the unit (e.g., base, insert,
lid, etc.) Alternatively, or in combination, the photocatalyst may
be provided as a separate insert 230 that is placed within the unit
(such inserts may also be combined with plungers and other plumbing
tools as described herein.) In any case, the photocatalyst will be
placed within a line-of-sight of the UV light source and/or it will
be placed such that UV light shines onto and activates the
catalyst.
[0098] FIG. 9B shows an exploded view of the unit 250. As shown,
the unit may include the insert 262 within the base 252 and base
cap 264 that is removable to access the electrical components
and/or power supply. The bottom of the insert 262 is open or
otherwise transparent to allow for the UV source (not shown) to
deliver light into the insert 262. The insert 262 may also contain
a cover 220 to help in preventing liquids from contacting the light
source or associated components. FIG. 9B also shows a variation of
the circuitry 214 and power supply 216 associated with the unit
250. In this variation, a switch 218 is used to trigger the light
source. The switch 218 may limit the light source for activation
upon placement of the tool. Alternatively, or in combination, the
switch 218 may be a safety type switch that prevents or terminates
the light source upon removal of the tool 12.
[0099] FIG. 9C illustrates a sectional view of a top portion of the
unit 250. As shown, the switch 218 may be triggered by the weight
of the tool or lid 20. Alternatively, the tool or lid 20 may
complete the circuit of the switch 20 to trigger the UV cycle.
[0100] FIG. 9D illustrates a variation of the illumination source
210, circuitry 214, and power supply 216. In this variation, the
circuitry 214 comprises a socket 222 for the UV source 210, the
socket is coupled to a printed circuit board 224 for containing the
algorithms or cycle information (see e.g., FIG. 10). In this
variation, the circuitry 214 contains a starter 226, where the
voltage regulator (not shown) is housed on the circuit board.
[0101] Examples of such parts may be found as follows: switch
contact crimp-terminal A3B-A4B type (supplier Digi-Key part
H9999-ND, manufacturer A3B-2630SCC); sensor wires 18-26 gauge;
socket--#710 intermediate phenolic lampholder (supplier
LightBulbDepot.com); lamp (9.09v, 2 watt, 0.22 amp, base--E17,
shape T7, length 55 mm, UVC, supplier Bulbman.com); ballast
(starter FS-5, manufacturer code 18344, supplier Bulbman.com).
[0102] FIG. 9E illustrates an exploded variation of a brush 12 for
use with the present system. However, FIG. 9E illustrates features
that may be incorporated with any plumbing tool as described
herein. As shown, a plumbing tool may use a lid 20 member to
activate the UV cycle and/or to block UV light. The lid 20 may be
configured to permit a small amount of light to pass therethrough.
This "escaped" light may be sufficient for the user to confirm
activation of the UV light.
[0103] FIG. 10 illustrates a flowchart representation of a
variation of the logic flowchart contained on a circuit board for
controlling the unit.
[0104] The bases described herein may be provided in any suitable
form. The base may be constructed to sealably hold the head of a
plunger or toilet brush when not in use, typically with a portion
of the plunger or brush (e.g., the handle portion) sticking up
through an aperture in the top of the base, the base establishing a
seal with the portion of the plunger or toilet brush that extends
through the aperture.
[0105] In certain embodiments, the UV base is in the form of a
clamshell having a bottom surface and two or more side panels or
petals connected (e.g., as by hinges) to the bottom surface. The
petals may be adapted to automatically close around the plunger or
brush upon contacting the plunger or brush with the base.
[0106] Disposed within the interior of the base is an UV
sterilization system including at least one UV light bulb or
source. In many embodiments, a plurality of UV lights are provided
and positioned about the interior of the base so as to be directed
to different surface areas of the object being
sanitized/sterilized.
[0107] In one embodiment, a first or bottom light source is
positioned on the bottom surface of the base and adapted to
sanitize or sterilize at least the bottom or underside of a toilet
brush or plunger. In certain instances, top bristles of a brush or
the top of a traditional plunger dome will not be exposed to light
from this bottom-surface light source. Therefore, at least two
additional UV bulbs or light sources may be included: one for each
side of the top surface.
[0108] Embodiments may include a base having one or more top light
sources positioned on one or more of the petals to sterilize the
top or upperside and/or sides of a toilet brush or plunger. A light
source may be associated with each petal of the base. For example,
a 2-petal base may include 1 UV light source on the bottom and one
UV light source on each petal for a total of 3 light sources, a
3-petal base may include 1 UV light source on the bottom and one UV
light source on each petal for a total of 4 light sources, etc.
[0109] In certain embodiments, the light source(s) are
automatically activated once a plunger or toilet brush is received
for storage therein. After a predetermined period of time, the
light sources may automatically turn off.
[0110] Also provided are kits that include the subject plunger
devices. A kit may include a subject plunger device and one or more
interchangeable liquid dispensing caps and brushes to be used with
the plunger. In one embodiment, a kit may include a subject plunger
device and a sterilization unit for sterilizing the device. The kit
my further include instructions for use, various cleaning supplies,
etc.
[0111] Devices and methods of the present invention include
combinations of features/aspects of various embodiments as well as
the combination of the embodiments themselves wherever possible. As
for other details of the present invention, materials and
manufacturing techniques may be employed as within the level of
those with skill in the relevant art.
* * * * *