U.S. patent number RE38,692 [Application Number 10/390,637] was granted by the patent office on 2005-02-01 for drinking device.
This patent grant is currently assigned to Fu Hong Industries Ltd.. Invention is credited to Chung Lun Wong.
United States Patent |
RE38,692 |
Wong |
February 1, 2005 |
Drinking device
Abstract
A drinking device including a body having an open end and for
containing a liquid, and a lid for sealingly closing the open end
of the body. The lid has an outlet incorporating a first one-way
valve for dispensing liquid from the body upon the application of
suction at the outlet and an inlet incorporating a second one-way
valve for air intake to automatically balance the internal pressure
within the body with external pressure outside the body while
liquid is being dispensed. The first valve includes a chamber
having a resiliently deformable wall including a hole in
communication with the outlet. The hole is normally closed by being
pressed against an internal surface of the body by the resilience
of the wall and is openable upon the application of suction.
Inventors: |
Wong; Chung Lun (Hong Kong,
HK) |
Assignee: |
Fu Hong Industries Ltd.
(Kowloon, HK)
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Family
ID: |
24763637 |
Appl.
No.: |
10/390,637 |
Filed: |
March 19, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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Reissue of: |
688233 |
Oct 16, 2000 |
06325236 |
Dec 4, 2001 |
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Current U.S.
Class: |
220/713;
215/11.5; 220/714; 220/717 |
Current CPC
Class: |
B65D
47/06 (20130101) |
Current International
Class: |
B65D
39/08 (20060101); B65D 39/00 (20060101); B65D
039/08 () |
Field of
Search: |
;220/714,713,717,203.19,718,203.11,203.29,707,711
;215/11.5,11.4,338,309 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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2 266 045 |
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Oct 1993 |
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GB |
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2 317 608 |
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Apr 1998 |
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GB |
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2 333 770 |
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Aug 1999 |
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GB |
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WO 00/28864 |
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May 2000 |
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WO |
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Primary Examiner: Moy; Joseph Man-Fu
Attorney, Agent or Firm: Leydig, Voit & Mayer, Ltd.
Claims
What is claimed is:
1. A drinking device comprising: a body having an open end and for
containing a liquid, and a lid for sealingly closing the open end
of the body, said lid having an outlet incorporating a first
one-way valve for dispensing a liquid from the body through the
outlet, upon application of suction to the outlet, and an inlet
incorporating a second one-way valve for air intake to
automatically balance internal pressure within the body, sealed
with the lid, with external pressure outside the body while a
liquid is being dispensed through the outlet, wherein the first
one-way valve comprises a chamber having a resiliently deformable
wall including a hole in communication with the outlet .Iadd.and a
resiliently deformable sleeve.Iaddend., .Iadd.and the lid includes
a member extending from the outlet within the sleeve and forming
the chamber, the member including an internal duct connecting the
outlet to the chamber, .Iaddend.and, when the body is sealed with
the lid, the first one-way valve is normally closed by pressing of
the resiliently deformable wall against an internal surface of the
body by resilience of the resiliently deformable wall and the first
one-way valve is opened upon application of suction to the
outlet.
2. The drinking device as claimed in claim 1, wherein the inlet is
located in the lid.
3. The drinking device as claimed in claim 1, wherein the open end
of the body has a rim for engagement with the lid.
4. The drinking device as claimed in claim 3, wherein the lid
externally engages the rim of the body for sealing the open end of
the body.
5. The drinking device as claimed in claim 1, wherein the chamber
wall has a protruding tubular rim surrounding the hole for engaging
the surface of the wall depending from the lid of the body for
closing the hole.
6. The drinking device as claimed in claim 1, wherein the chamber
wall has a protruding tubular rim surrounding the hole for engaging
the internal surface of the body for closing the hole..[.
7. The drinking device as claimed in claim 1, wherein the chamber
includes a resiliently deformable sleeve, and the lid includes a
member extending from the outlet within the sleeve and forming the
chamber, the member including an internal duct connecting the
outlet to the chamber..].
8. The drinking device as claimed in claim .[.7.].
.Iadd.1.Iaddend., wherein the member has a first end along which
the duct extends and a second end supporting the sleeve and
including a void directly opposite the hole receiving part of the
resiliently deformable wall upon opening of the first one-way
valve.
9. The drinking device as claimed in claim .[.7.].
.Iadd.1.Iaddend., wherein the sleeve has a rectangular box-like
body having an open side receiving the member.
10. The drinking device as claimed in claim 1, wherein the inlet
includes a hole in the lid, and the second one-way valve is a slit
valve located in the hole in the lid.
11. The drinking device as claimed in claim 1, including a flexible
member wherein the first and second one-way valves are integral to
and located at opposite ends of the flexible member.
12. The drinking device as claimed in claim 1, wherein the outlet
includes an upstanding spout in the lid.
13. A drinking device comprising: a body having an open end and for
containing a liquid, and a lid for sealingly closing the open end
of the body, said lid having an outlet incorporating a first
one-way valve for dispensing a liquid from the body through the
outlet in a direction generally transverse to the lid, upon
application of suction to the outlet, an inlet incorporating a
second one-way valve for air intake to automatically balance
internal pressure within the body, sealed with the lid, with
external pressure outside the body while a liquid is being
dispensed through the outlet, and a depending wall extending into
the body when the body is sealed with the lid, wherein the first
one-way valve comprises a chamber having a resiliently deformable
wall including a hole in communication with the outlet, the first
one-way valve being normally closed by pressing of the resiliently
deformable wall against the depending wall depending from the lid,
by resilience of the resiliently deformable wall, and the first
one-way valve being opened by moving in a direction generally
transverse to the outlet, upon application of suction to the
outlet.
14. The drinking device as claimed in claim 13, wherein the inlet
is located in the lid.
15. The drinking device as claimed in claim 13, wherein the open
end of the body has a rim for engagement with the lid.
16. The drinking device as claimed in claim 15, wherein the lid
externally engages the rim of the body for sealing the open end of
the body.
17. The drinking device as claimed in claim 13, wherein the chamber
includes a resiliently deformable sleeve, and the lid includes a
member extending from the outlet within the sleeve and forming the
chamber, the member including an internal duct connecting the
outlet to the chamber.
18. The drinking device as claimed in claim 17, wherein the member
has a first end along which the duct extends and a second end
supporting the sleeve and including a void directly opposite the
hole receiving part of the resiliently deformable wall upon opening
of the hole.
19. The drinking device as claimed in claim 17, wherein the sleeve
has a rectangular box-like body having an open side receiving the
member.
20. The drinking device as claimed in claim 13, wherein the inlet
includes a hole in the lid, and the second valve is a one-way slit
valve located in the hole in the lid.
21. The drinking device as claimed in claim 13, including a
flexible member wherein the first and second one-way valves are
integral to and located at opposite ends of the flexible member.
Description
The present invention relates to a drinking device, and
particularly, but not exclusively, to a trainer cup for infants,
which is leak-proof.
BACKGROUND OF THE INVENTION
Leak-proof drinking devices are, of course, generally known,
particularly for infants, which usually have a body and a lid
closing the body. In one of the known constructions, for example as
disclosed in UK Patent No. 2266045, the lid has an outlet for
dispensing liquid and an air inlet for pressure balance, both of
which are provided with respective one-way valves to protect
against leakage.
Liquid is to be extracted from inside the body through suction
applied to the outlet. While the valve of the outlet should be
closed reasonably tightly normally, it has to be opened relatively
easily to facilitate drinking. None of the known devices is found
to be satisfactory in this regard.
The invention seeks to mitigate or at least alleviate such a
problem by providing an improved drinking device.
SUMMARY OF THE INVENTION
According to the invention, there is provided a drinking device
comprising a body having an open upper end and for containing a
liquid, a lid for sealingly closing the upper end of the body, the
lid having an outlet incorporating a first one-way valve for
dispensing the liquid from the body upon the application of suction
at the outlet, and an inlet incorporating a second one-way valve
for air intake to automatically balance the internal pressure of
the closed body with the external pressure while the liquid is
being dispensed, wherein the first valve comprises a chamber having
a resiliently deformable wall including a hole in communication
with the outlet, which hole is normally closed by being pressed
against an internal surface of the drinking device by virtue of the
resilience of the wall and is openable upon the application of said
suction.
It is preferred that the inlet is provided at the lid.
Preferably, the upper end of the body has a rim for engagement with
the lid, and the internal surface against which the hole of the
chamber wall is normally pressed is provided by an inner surface of
the body at a position slightly below the rim.
More preferably, the lid is arranged to engage externally around
the rim of the body for closing the body upper end.
In a slightly different construction, the lid includes a depending
wall providing the internal surface against which the hole of the
chamber wall is normally pressed.
It is preferred that the hole of the chamber wall has a tubular rim
protruding outwards for engaging the internal surface of the
drinking device.
In a preferred embodiment, the chamber is provided by a resiliently
deformable sleeve, and the lid includes a member which extends
downwards from the outlet and around which the sleeve is disposed
for support to form the chamber, the member incorporating a
co-extending internal duct connecting the outlet to the interior of
the chamber.
More preferably, the member has an upper end along which the duct
extends and a lower end supporting the sleeve and forming a void
directly behind the hole of the chamber wall to provide excessive
room for that part of the chamber wall to bend inwards for opening
the hole.
Further more preferably, the sleeve has a rectangular box-like body
having an open upper side which is stretched from below over the
lower end of the member to form the chamber.
It is preferred that the lid has a centre hole acting as the inlet,
and the second valve is of a slit valve located at the centre
hole.
Advantageously, the first and second valves are connected
integrally to opposite ends of a flexible member, thereby together
forming a one-piece seal.
The aforesaid drinking device may be a trainer cup for infants,
wherein the lid includes an upstanding spout having an apex
providing the outlet.
BRIEF DESCRIPTION OF DRAWINGS
The invention will now be more particularly described, by way of
example only, with reference to the accompanying drawings, in
which:
FIG. 1 is a side view of an embodiment of a drinking device in
accordance with the invention, the device having a body and a lid
incorporating a seal;
FIG. 2 is a front view of the drinking device of FIG. 1;
FIG. 3 is a cross-sectional side view of a portion of the lid of
FIG. 1;
FIG. 4 is a bottom plan view of a part of the lid portion of FIG.
3;
FIG. 5 is a side view of the seal of FIG. 1;
FIG. 6 is a top plan view of the seal of FIG. 5;
FIG. 7 is an end view of the seal of FIG. 5;
FIG. 8 is a cross-sectional side view of an upper portion of the
drinking device of FIG. 1, with the seal in a closed condition;
FIG. 9 is a cross-sectional side view corresponding to FIG. 8,
showing the seal in an open condition; and
FIG. 10 is a cross-sectional side view of an upper portion of a
slightly different embodiment of a drinking device in accordance
with the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
Referring initially to FIGS. 1 to 9 of the drawings, there is shown
a drinking device embodying the invention, which is in the form of
a trainer cup 10 for infants and comprises a plastic body 100 for
containing liquid and a plastic lid 200. The cup body 100 includes
an open upper end 110 having a circular rim 112, over which the lid
200 is pressed for sealingly closing the cup end 110. The lid 200
has a circular body 210 which comprises a depending rim 212 for
externally engaging the cup rim 112, an air inlet hole 214 at the
centre, and an upstanding spout 220 on one side.
The spout 220 has an apex 222 with an outlet hole 224 and includes
an internal integral member or bar 230 extending, downwards from
the apex 222, at a position close to the lid rim 212. The bar 230
has an upper end (half) 232 which has a hollow rectangular
cross-section and includes a co-extending partition 234. The
partition 234 has a part-circular cross-section and defines a duct
236 extending downwards from the outlet 224 above and on the outer
side of the bar 230 facing the lid rim 212. The partition 234
continues onto a lower end (half) 238 of the bar 230, where it is
exposed to form an empty space or void 239 on the outer side of the
bar 230.
The lid 200 incorporates a resiliently deformable seal 300 made of
silicone rubber. The seal 300 includes a one-way slit valve 310 and
another one-way valve including a sleeve 320, which are connected
integrally to opposite ends of a tape 330, thereby together forming
a one-piece structure.
The slit valve 310 has a grommet-like body 312 press-fitted from
below through the inlet 214 of the lid 200 and includes a
hemispherical valve member 314 at the lower end of the body 312.
The valve member 314 includes a split 316 that is normally-closed
(FIG. 8). The valve member 314 protrudes from the underside of the
lid 200 such that the slit 316 will open (FIG. 9) when the pressure
inside the closed cup 100 drops.
The sleeve 320 has a rectangular box-like sleeve body 322 having an
open upper side 324, which is stretched from below over the lower
end 238 of the bar 230 of the lid 200. The upper rim of the sleeve
body 322 reaches over the lowermost end of the upper end 232 of the
bar 230, thereby forming a chamber 323 enclosing the lower bar end
238.
Outer wall 326 of the sleeve body 322 or chamber 323 includes a
hole 328 which has a tubular rim 329 protruding outwards. The hole
328 is positioned directly in front of the void 239 in the bar 230
such that there is excessive room, as provided by the void 239, for
the part of the chamber wall 326 including the rim 329 to bend
inwards.
The spout outlet 224 is in communication with the sleeve hole 328
via the duct 236 and the void 239, whereby a through path X is
formed. The bar 230 is arranged such that when the lid 200 is in
place, the rim 329 of the sleeve hole 328 is pressed against the
inner surface of the cup body 100 at a position slightly below the
rim 112, whereby the hole 328 is normally closed and hence the path
X blocked (FIG. 8).
When the trainer cup 10 containing water (for example) is in use at
an inverted position, the infant sucks at the spout 220 and thus
creates a suction or pressure drop within the chamber 323. The
pressure drop causes the wall 326 of the sleeve body 322 to bend
inwards, thereby moving the rim 329 away from the aforesaid inner
surface of the cup body 100 and thus resulting in opening or
unblocking of the hole 328 (FIG. 9). Water can simultaneously flow
out along the path X and be dispensed at the spout 220 for as long
as the infant is sucking, via the sleeve 320 acting as a one-way
valve.
The loss of water creates a pressure drop within the cup 10, which
is compensated in terms of volume by air drawn in through the slit
valve 310, which automatically opens for air intake to balance the
internal pressure of the cup 10 with the external pressure, as
required, for water dispensing. When the infant stops drinking, the
hole 328 is instantly re-closed by virtue of the resilience of the
chamber wall 326.
By reason of the construction of the one-way dispensing valve with
the sleeve 320, the subject drinking device 10 enables users to
drink easily, while preventing liquid leakage when not in use.
Reference is now made to FIG. 10, which shows a slightly different
cup 10A embodying the invention, with equivalent parts designated
by the same reference numerals suffixed by a letter "A". Compared
with the previous cup 10, the only major difference of this cup 10A
lies in the lid 200A having an integral wall 216 which extends
downwards from the lid body 210A at a position close to the bar
230A. The wall 216 provides an inner surface for pressing by the
rim 329A and closing the hole 328A of the chamber wall 326A, as an
alternative to the inner surface of the previously described cup
body 100. With this construction, the spout 220A will remain closed
even when the lid 220A is removed from the cup body 100A.
In general, it is envisaged that the air inlet (with slit valve)
may be provided on the cup body instead of the lid, for example on
the shoulder of the cup body in the case where the cup body has an
open end of a reduced size.
The invention has been given by way of example only, and various
other modifications of and/or alterations to the described
embodiments may be made by persons skilled in the art without
departing from the scope of the invention as specified in the
appended claims.
* * * * *