U.S. patent number 3,779,430 [Application Number 05/280,855] was granted by the patent office on 1973-12-18 for water dispenser for small animals.
Invention is credited to Motohiro Niki.
United States Patent |
3,779,430 |
Niki |
December 18, 1973 |
WATER DISPENSER FOR SMALL ANIMALS
Abstract
A funnel securely mounted within a casing has a metal ball
displaceably fitted in its bottom opening. A tube swingably
supported by a rubber disk has its funnel-shaped upper end
positioned opposite to the ball partly projecting out of the bottom
opening of the funnel. When the tube is swung about the disk by the
application of a force at its lower end, the funnel-shaped upper
end of the tube lifts the ball by leverage, so that water stored in
the funnel flows down into the tube. In another embodiment of the
invention, the spacing between the ball and the funnel-shaped upper
end of the tube is made adjustable to regulate the rate of water
flow into the latter.
Inventors: |
Niki; Motohiro (Bunkyo-ku,
Tokyo, JA) |
Family
ID: |
26391219 |
Appl.
No.: |
05/280,855 |
Filed: |
August 15, 1972 |
Foreign Application Priority Data
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|
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Aug 16, 1971 [JA] |
|
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46/62197 |
May 24, 1972 [JA] |
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47/50754 |
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Current U.S.
Class: |
222/501;
222/509 |
Current CPC
Class: |
B65D
25/38 (20130101); A01K 7/06 (20130101) |
Current International
Class: |
A01K
7/06 (20060101); A01K 7/00 (20060101); B65D
25/38 (20060101); B65d 025/44 () |
Field of
Search: |
;222/211,517,536,464,501,509,525,500,144.5 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Tollberg; Stanley H.
Claims
I claim:
1. A water dispenser comprising a casing, water storage means
within said casing, normally closed valve means provided at the
bottom of said storage means, a water dispensing tube depending
from within said casing and having an upper end operatively
associated with said valve means and a lower end projecting
downwardly out of said casing, means for swingably supporting said
tube, the relation of said valve means and said upper end of the
tube being such that when said tube is swung by a force applied to
said lower end thereof, said upper end opens said valve means,
thereby permitting the water within said storage means to flow down
into and through said tube, means forming a chamber below said
valve means and around said tube, into which chamber the water
flows and is stored therein when said valve means is opened, and
means forming at least one radial perforation through the wall of
said tube for permitting conveyance of the smell of the water from
within said chamber through said tube to said lower end of the
tube, which smell can be sensed by small animals.
2. The water dispenser according to claim 1, further comprising a
hollow cylindrical portion extending downwardly from the bottom of
said casing, said tube extending through the interior of said
cylindrical portion with clearance and with said lower end
projecting downward from the lower end of the cylindrical
portion.
3. The water dispenser according to claim 1, further comprising an
air vent formed in said tube to facilitate the flow of water
therethrough.
4. The water dispenser according to claim 1, wherein said casing
includes a container section, a cap section, and a bottom section,
all of said sections being threadedly secured to each other.
5. The water dispenser according to claim 2, wherein said hollow
cylindrical portion is integral with said casing.
6. A water dispenser comprising a casing, storage means securely
mounted within said casing for the storage of water to be
dispensed, normally closed valve means provided at the bottom of
said storage means, a tube depending from within said casing and
having a lower end projecting downwardly out of said casing, said
tube having an upper end positioned adjacent to said valve means,
and a member of resilient material supported within and by said
casing and swingably supporting said tube at the point closer to
said upper end thereof, the relation of said valve means and said
upper end of the tube being such that when said tube is swung
relative to said member by a force applied to said lower end
thereof, said upper end acts on said valve means to cause the same
to open, thereby permitting the water within said storage means to
flow down into and out of said tube through said valve means,
further comprising a chamber formed on the bottom of said casing,
into which water flows when said valve means is opened, and at
least one radial perforation through the wall of said tube for
permitting the conveyance of the water from said chamber into said
tube and thus conveying the smell of the water to said lower end of
the tube.
7. A water dispenser comprising a casing, a funnel having a bottom
opening and being mounted within said casing for the storage of
water to be dispensed, a ball displaceably fitted in said bottom
opening of the funnel to keep said opening normally closed, said
ball partly projecting downwardly out of said bottom opening of the
funnel, a tube depending from within said casing, said tube having
a funnel-shaped upper end normally positioned coaxially below said
ball and spaced apart therefrom, and a lower end projecting
downwardly out of said casing, and a member of resilient material
supported within and by said casing and swingably supporting said
tube at a point closer to said upper end thereof, the spacing
between said upper end and said ball being such that when said tube
is swung relative to said member by a force applied to said lower
end thereof, said upper end contacts and causes said ball to move
upward, thereby permitting the water within said funnel to flow
down into and out of said tube through said upper end thereof,
further comprising another ball of greater diameter than that of
said first-named ball, displaceably resting upon the latter within
said funnel to prevent leakage of water through said bottom opening
thereof.
8. The water dispenser according to claim 7, further comprising a
chamber formed on the bottom of said casing, into which water flows
when said bottom opening of the funnel is opened, and at least one
radial perforation through the wall of said tube for permitting the
conveyance of the water from said chamber into said tube and thus
conveying the smell of the water to said lower end of the tube.
9. The water dispenser according to claim 7, further comprising a
further ball supported within said tube adjacent said lower end
thereof for regulating the rate of water outflowing therefrom.
10. A water dispenser comprising a casing, storage means securely
mounted within said casing for the storage of water to be
dispensed, normally closed valve means provided at the bottom of
said storage means, a tube depending from within said casing and
having a lower end projecting downwardly out of said casing, said
tube having an upper end positioned adjacent to said valve means,
and a member of resilient material supported within and by said
casing and swingably supporting said tube at a point closer to said
upper end thereof, the relation of said valve means and said upper
end of the tube being such that when said tube is swung relative to
said member by a force applied to said lower end thereof, said
upper end acts on said valve means to cause the same to open,
thereby permitting the water within said storage means to flow down
into and out of said tube through said valve means, further
comprising a hollow cylindrical portion extending downwardly from
the bottom of said casing, said tube extending through the interior
of said cylindrical portion with clearance and with said lower end
projecting downward from the lower end of the cylindrical portion,
wherein said hollow cylindrical portion is screwed in said casing
so as to be adjustable in vertical position, and the upper end of
the cylindrical portion is in engagement with the lower surface of
said member of resilient material, whereby adjustment of said
member and therefore of said tube may be made by turning said
cylindrical portion relative to said casing.
11. A water dispenser comprising a casing having a tapped hole
extending vertically through its bottom, a hollow cylindrical
member screwed into said hole and having a portion projecting
downwardly therefrom, a funnel mounted within said casing for the
storage of water to be dispensed, a ball displaceably fitted in a
bottom opening of said funnel to keep said opening normally closed,
said ball partly projecting downwardly out of said bottom opening,
a tube extending through the interior of said cylindrical member
with clearance, said tube having a funnel-shaped upper end normally
positioned coaxially below said ball and spaced apart therefrom,
and a lower end projecting downwardly out of said cylindrical
member, and a member of resilient material supported within and by
said casing and swingably supporting said tube at a point closer to
said upper end thereof, said member being vertically movable by
said cylindrical member to adjust the spacing between said upper
end of the tube and said ball, said spacing being such that when
said tube is swung from said member by a force applied to said
lower end thereof, said upper end contacts and causes said ball to
move upward, thereby permitting the water within said funnel to
flow down into said tube through said upper end thereof.
Description
BACKGROUND OF THE INVENTION
This invention relates to a device for dispensing controlled
amounts of drinking water to comparatively small animals, and in
particular to such a water dispenser designed principally for mice,
rats and similar animals being bred in a confined space for
experimental purposes.
A water dispenser of this kind must, above all, be of watertight or
leakage-free construction because an excessively wetted cage or
other enclosures can lead to the death of some experimental animals
confined therein. Such animals are particularly susceptible to the
moisture of wood chips or the like generally used to cover the
bottom of the cage, and it is important to note that the wood chips
can be thoroughly moistened in a day or two by the water leaking
drop by drop from the dispenser. However, O-rings or like means
heretofore employed to seal against leakage have made the prior
water dispensers unnecessarily complex and expensive.
Further, most of these prior devices make use of springs for
controlled water dispensation. These spring-type water dispensers
have a serious drawback in that leakage can easily occur if their
springs are made highly yielding to render the devices responsive
to slight pressures exerted by the animals. The leakage thus caused
can be prevented only by making the devices less responsive.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a novel and
improved water dispenser of the class referred to which is of
simple and inexpensive construction but in which the possibility of
water leakage is minimized.
Another object of the invention is to provide a water dispenser of
the above described class in which leverage is utilized to make the
device highly responsive to forces exerted by water-seeking
animals, without sacrificing its watertightness.
A further object of the invention is to provide a water dispenser
of the above described class capable of dispensing water is a
well-regulated manner when actuated.
According to the present invention, briefly summarized, there is
provided a water dispenser comprising a casing, a funnel securely
mounted within the casing for the storage of water to be dispensed,
valve means provided at the bottom of the funnel, the valve means
being normally closed, a tube depending from within the casing and
having a lower end projecting downwardly out of the casing, the
tube having an upper end positioned adjacent to the valve means,
and a member of resilient material on the bottom of the casing
swingably supporting the tube at a point closer to the upper end
thereof, the relation of the valve means and the upper end of the
tube being such that when the tube is swung relative to the member
by a force applied to the lower end thereof, the upper end acts on
the valve means to cause the same to open thereby permitting the
water within the funnel to flow down into and out of the tube
through the valve means.
The novel features which are considered as characteristic of this
invention are set forth in the appended claims. The invention
itself, however, together with additional objects and advantages
thereof, will be best understood from the following detailed
detailed description taken in connection with the accompanying
drawings, throughout which like parts are designated by like
reference numerals.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings:
FIG. 1 is an elevation, partly in vertical section, showing an
example of a water dispenser according to this invention;
FIG. 2 is an elevation, with parts shown by phantom outlines,
showing a modification of the water dispenser of FIG. 1 in which
two metal balls are used to keep the bottom opening of a funnel
normally closed;
FIG. 3 is a top plan view of a rubber disk mounted on the bottom of
the dispenser of FIG. 1 and a pipe extending centrally
therethrough;
FIG. 4 is an elevational view explanatory of the relationship
between the rubber disk, the pipe, and a ball keeping the bottom
opening of the funnel normally closed in the dispenser of FIG.
1;
FIG. 5 is a view similar to FIG. 1, showing another example of a
water dispenser according to the invention;
FIG. 6 is an elevational view, partly in vertical section, showing
the pipe together with the disk and the ball as used in the
dispenser of FIG. 5; and
FIG. 7 is partial vertical sectional view showing the flattened
lower end of the pipe of FIG. 6.
DETAILED DESCRIPTION
With particular reference to FIG. 1 of the drawings, the water
dispenser illustrated therein by way of a first perferred
embodiment of the invention comprises essentially a container
section 1, a cap section 2, and a bottom section 3. All these
sections may be conveniently molded of acrylic resin or other
synthetic resins or plastics. The container section 1 has a tapered
interior with conical inner surface 4 to receive a conical funnel 5
of rubber or like material. This funnel 5 has a bottom opening 6
which is normally closed by a valve member or metal ball 7 having a
slightly greater diameter than the opening 6. The water within the
funnel 5 is thus prevented from flowing out of its bottom opening.
It should be noted that when the ball 7 is fully lowered to its
normal stationary position under its own weight, nearly all of its
lower half projects out of the bottom opening.
Around the lower rim of the cap section 2, there is formed an
annular groove 8 to divide the same into an inner portion 9 and an
outer portion 10. The inner surface of the outer portion 10 is
screw threaded at 10a to mesh with external screw threads formed on
the container section 1. The lower rim 11 of the inner portion 9
presses the upper rim 12 of the funnel 5 against the inner surface
of the container section 1, thereby preventing the overflow of
water out of the funnel and also securely retaining the same in
position within the container section 1.
The bottom section 3 has a cylindrical upper portion 14, into which
is screwed the lower end portion 13 of the container section 1, and
a cylindrical lower portion 16 of smaller diameter extending
downward from the center of the cylindrical upper portion 14.
Extending with appropriate clearance through the hollow interior of
the cylindrical lower portion 16 is a tube 15 which is retained in
position by a disk 19 of rubber or similarly resilient material
held between the lower surface 17 of the container section 1 and a
ledge surface 18 of the bottom section 3. It should be noted that
the tube 15 is frictionally secured to the disk 19 and extends
watertightly through the center of the disk 19, as shown in FIG. 3
in particular.
As illustrated in greater detail in FIG. 4, the tube 15 has a
funnel-shaped upper end 20, which is placed to coaxially confront
the ball 7 projecting out of the bottom opening 6 of the funnel 5.
It is important that the tube 15 be so positioned by the disk 19 as
to provide a suitable spacing between its funnel-shaped upper end
20 and the ball 7. This positioning of the tube 15 will be easier
if, as in FIG. 4, it is provided with projections 21 which are to
come into contact with the disk 19 when the tube is properly
supported thereby. The tube 15 is further formed with one or more
perforations 22 of capillary dimensions above the position of the
disk 19, and with an air vent 23 therebelow. The lower end of this
tube 15 projects out of the lower end 25 of the cylindrical lower
portion 16 of the bottom section 3, as seen in FIG. 1.
For use, the water dispenser of the above described construction
may be suitably mounted within a cage or the like in such a manner
that the lower end 24 of its tube 15 is positioned within easy
reach of the animals confined therein. The funnel 5 is filled with
water W. No leakage takes place through its bottom opening 6
because this opening is now completely closed by the valve member
or ball 7. Since the smell of water is conveyed to the projecting
lower end 25 of the tube 15 through its perforation or perforations
22, as hereinafter explained in more detail, a thirsty animal will
instinctively nudge the tube end 24 with its nose upon sensing this
smell of water.
The force thus exerted to the lower end of the tube 15 causes its
funnel-shaped upper end 20 to turn about a line lying in the plane
of the disk 19 and thus to lift the ball 7 by leverage. Through the
gap formed as a resultant between the ball and the lower edge of
the funnel 5, the water flows down into the funnel-shaped upper end
20 of the tube 15 as well as into a chamber 26 defined below the
funnel 5 by the lower end portion 13 of the container section 1 and
the disk 19. Owing to the provision of the air vent 23, the water
that has flowed into the funnel-shaped upper end of the tube
smoothly streams out of the tube lower end 24, to be drunk directly
by the animal.
The water which has flowed into the chamber 26, on the other hand,
gradually permeates into the tube 15 through its perforation or
perforations 22 and trickles down the tube to convey the smell of
water to its lower end even after the funnel opening 6 has been
closed, although the animals will soon acquire the habit of pushing
the projecting tube end 24 whenever they feel thirst. When no force
is applied to this lower end of the tube, its funnel-shaped upper
end 20 is kept centered by the resilient disk 19, so that the ball
7 closes the funnel opening 6 to stop dispensation of water. In
order to make sure that no leakage takes place through this funnel
opening when the same is closed, there may be provided another ball
7a of greater diameter upon the ball 7, as illustrated
schematically in FIG. 2.
FIG. 5 shows another preferred embodiment of the invention in which
are incorporated some modifications of the embodiment shown in FIG.
1 with a view to providing still further well-regulated water
dispensation. The water dispenser illustrated in FIG. 5 also
comprises a container section 1, a cap section 2, and a bottom
section 3. The container section 1 is formed with a hole 27
extending axially through its bottom 28 and has a conical recess 29
at its bottom to provide a chamber 26 above a disk 19. A funnel 5
of rubber or like material is snugly mounted inside the container
section 1, and a metal ball 7 is received in its bottom opening 6
in the same manner as in the example illustrated in FIG. 1.
The bottom section 3 has a separatedly formed hollow cylindrical
member 30 screwed axially therein at 3a from its lower surface,
instead of the integrally formed cylindrical lower portion 16 of
FIG. 1. The upper end of the hollow cylindrical member 30, thus
screwed into the bottom section 3, contacts the lower surface of
the disk 19 tightly supporting a tube 15 in its central hole. This
tube 15 is substantially the same as that in the preceding example
of FIG. 4 except for the provision of a metal ball 31 fixedly
accommodated in its flattened lower end 32, the ball 31 having a
diameter suitably smaller than the bore of the tube 15 and being
confined in the lower end 32 by any suitable means. This ball is
adapted for regulation of the rate of water flow out of the tube
end 32. Other details of construction of this embodiment of the
invention are similar to those already set forth in connection with
FIGS. 1 through 4.
In order to regulate the flow rate of water out of the tube end 32
of the water dispenser constructed and assembled as in FIG. 5, the
hollow cylindrical member 30 is manually turned relative to the
bottom section 3. The longitudinal displacement thus imparted to
the member 30 causes the disk 19 to correspondingly move the tube
15, thereby varying the gap between its funnel-shaped upper end 20
and the ball 7. This gap may be suitably adjusted while at the same
time the actual water flow rate is being visually confirmed by
actuating the projecting end of the tube 15.
The water dispenser thus adjusted is mounted within a cage or other
enclosure. When an animal confined in the cage, scenting water as
above stated, pushes the projecting lower end of the tube 15, a
controlled amount of water flows down through the tube and, further
regulated by the ball 31, streams out of its lower end, to be
easily drunk by the animal. In this manner, no more water will be
consumed than that actually drunk by the animal or animals within
the cage, so that this water dispenser may be used to the
particular advantage of the experimentalist who must be informed of
the exact amounts of water drunk by his animals.
* * * * *