U.S. patent application number 10/001257 was filed with the patent office on 2004-10-28 for no-spill drinking cup apparatus.
Invention is credited to Hakim, Nouri E..
Application Number | 20040211787 10/001257 |
Document ID | / |
Family ID | 22002975 |
Filed Date | 2004-10-28 |
United States Patent
Application |
20040211787 |
Kind Code |
A9 |
Hakim, Nouri E. |
October 28, 2004 |
No-spill drinking cup apparatus
Abstract
An improved no-spill cup construction and valve assembly which
provides an extremely secure seal against accidental liquid flow
from the cup spout. The act of sucking at the cup spout creates
negative pressure or a partial vacuum against a valve near the
spout, causing the valve to invert which unblocks an opening in the
valve. When the opening is unblocked, liquid can flow freely
through the valve and spout. When not in use, the valve sits in a
resting, closed position, with the valve pressed against a center
seal-off, sealing off the opening in the valve assembly. The closed
position provides an extremely secure seal against fluid leakage,
such that inadvertent spills or even deliberate attempts to force
liquid outside of the cup, such as by turning the cup upside down,
or shaking the cup, are ineffective. The cup assembly further
allows liquid flow to be regulated between regular or maximum flow
and minimal flow levels or rates by rotating the position of the
valve assembly in the cover of the cup.
Inventors: |
Hakim, Nouri E.; (Monroe,
LA) |
Correspondence
Address: |
Morris E. Cohen
Suite 217
1122 Coney Island Avenue
Brooklyn
NY
11230-2345
US
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Prior
Publication: |
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Document Identifier |
Publication Date |
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US 0098312 A1 |
May 29, 2003 |
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Family ID: |
22002975 |
Appl. No.: |
10/001257 |
Filed: |
November 27, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10001257 |
Nov 27, 2001 |
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09138588 |
Aug 21, 1998 |
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6321931 |
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60056218 |
Aug 21, 1997 |
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Current U.S.
Class: |
220/714 ;
220/717 |
Current CPC
Class: |
B65D 2543/00972
20130101; B65D 47/2031 20130101; B65D 2543/00092 20130101; F16K
7/12 20130101; B65D 2543/00351 20130101; B65D 2543/00296 20130101;
B65D 51/165 20130101; B65D 2543/00046 20130101; A47G 19/2272
20130101; B65D 2543/00527 20130101; B65D 2543/00537 20130101; B65D
43/0231 20130101 |
Class at
Publication: |
220/714 ;
220/717 |
International
Class: |
A47G 019/22 |
Claims
We claim:
1. An apparatus for use in a no-spill drinking cup, said apparatus
comprising: a valve holder, such valve holder comprising at least
one valve, said valve having a resting position and being closed to
block the passage of liquid therethrough while in said resting
position, said valve being movable into an open position for the
passage of liquid therethrough upon the application of negative
pressure to the top of said valve.
2. An apparatus for use in a no-spill drinking cup, comprising: a
flexible valve member, said valve member having a closed position
and an open position, wherein said valve member sits against a
sealing portion when in said closed position such that said sealing
portion blocks the passage of fluid through said valve member, and
wherein said valve member moves away from said sealing portion to
allow passage of liquid though said valve member upon application
of negative pressure to said valve member.
3. An apparatus for use in a no-spill cup, comprising: a flexible
valve member comprising an opening in said valve member, said
flexible member having a proximal side and a distal side; and a
sealing portion, said sealing portion comprising a first area which
is impenetrable to the flow of liquid therethrough, and a second
area through which liquid can flow, said distal side of said
flexible valve member resting against said sealing portion when
said flexible valve member is in the resting, closed position such
that said opening of said flexible valve member rests against said
first area when said flexible valve member is in said resting,
closed position, said flexible valve member backing off said
sealing portion upon the application of negative pressure to said
proximal side of said flexible valve member to allow fluid to flow
through said second area of said sealing portion and through said
opening of said flexible valve member.
4. An apparatus as claimed in claim 3, wherein said first area is
the central area of said sealing portion, and wherein said second
area is the peripheral area of said sealing portion.
5. A no-spill drinking cup assembly, comprising: a flexible valve
member, said flexible valve member having an opening therein; and,
a sealing portion, said flexible valve member resting against said
sealing portion when said valve member is in its closed position
such that said opening sits against said sealing portion to block
the passage of liquid through said opening.
6. An assembly as claimed in claim 5, said flexible valve member
further comprising an open position, said flexible valve member
being displaced away from said sealing portion in said open
position to provide liquid access to said opening, said flexible
member assuming said open position upon application of negative
pressure to the top of said valve member.
7. An assembly as claimed in claim 6, wherein said flexible valve
member inverts upon application of negative pressure to said valve
member to move said opening away from said sealing portion.
8. An assembly as claimed in claim 5, wherein said flexible valve
member is located in a valve assembly.
9. An assembly as claimed in claim 8, wherein said valve assembly
comprises at least one subunit for containing said valve
member.
10. An assembly as claimed in claim 9, wherein said valve assembly
comprises at least two subunits, each of said subunits comprising a
valve member therein.
11. An assembly as claimed in claim 9, wherein said valve assembly
comprises at least two subunits, a first subunit comprising a first
valve member comprising a first opening, and a second subunit
comprising a second valve member comprising a second opening, said
first opening being larger than said second opening.
12. An assembly as claimed in claim 11, wherein said first opening
is an "X" shaped slot.
13. An assembly as claimed in claim 11, wherein said second opening
is a "T" shaped slot.
14. An assembly as claimed in claim 11, wherein said first opening
is an "X" shaped slot and said second opening is a "T" shaped
slot.
15. An assembly as claimed in claim 5, wherein said assembly
further comprises a removable cap.
16. An assembly as claimed in claim 5, wherein said cap comprises a
valve assembly carrier for securing said valve assembly to said
cap.
17. An assembly as claimed in claim 15, further comprising a cup
for attachment to said removable cap.
18. An assembly as claimed in claim 17, wherein said cap is
provided with screw threads for screwing onto said cup.
19. An assembly as claimed in claim 17, wherein said cap is a
snap-on cap, for attachment to said cup.
20. An assembly as claimed in claim 9, wherein said sealing portion
is located in said subunit.
21. An assembly as claimed in claim 20, wherein said sealing
portion comprises a center seal-off stop, said center seal-off stop
comprising a solid central area impenetrable to liquid flow
therethrough, and a peripheral region surrounding said central
area, said peripheral region having at least one area open to the
passage of liquid therethrough.
22. An assembly as claimed in claim 21, wherein said opening rests
against said central region when said valve member is in its closed
position.
23. An assembly as claimed in claim 20, wherein said subunit
comprises a valve retainer for securing said flexible valve member
in said subunit.
24. An apparatus for use with a no-spill drinking cup, comprising:
a cap for attachment to a cup, said cap comprising a spout; a valve
assembly, at least a portion of said valve assembly being in
communication with said spout, said valve assembly comprising at
least one flexible valve member having an opening therein, said
flexible valve member resting in a closed position in which no
liquid can pass through said opening of said valve, said valve
moving to an open position to allow the passage of liquid through
said valve when negative pressure is applied to said valve through
said spout.
25. An apparatus as claimed in claim 24, wherein said valve
assembly further comprises a sealing portion, said sealing portion
comprising a first area and a second area, wherein said first area
is impenetrable to liquid flow therethrough, and said second area
allows the passage of liquid through said second area.
26. An apparatus as claimed in claim 25, wherein said first area is
the central area of said sealing portion and said second area is
the peripheral area of said sealing portion.
27. An apparatus as claimed in claim 24, wherein said cap further
comprises at least one vent in the surface of said cap to allow the
passage of air through said vent.
28. An apparatus as claimed in claim 24, wherein said valve
assembly comprises at least two subunits, said two subunits
comprising a first subunit and a second subunit, said first subunit
being in communication with said spout, said second subunit being
in communication with said vent in said cap.
29. An apparatus as claimed in claim 23, further comprising a
cup.
30. An apparatus as claimed in claim 24, wherein said cup is
attached to said cap.
Description
RELATED APPLICATIONS
[0001] The present application claims all rights of priority to
U.S. Nonprovisional application Ser. No. 09/138,588 filed Aug. 21,
1998, U.S. Nonprovisional application Ser. No. 09/271,779 filed
Mar. 18, 1999, and U.S. Provisional Patent Application No.
60/056,218, filed Aug. 21, 1997, all of which are fully
incorporated herein by reference.
FIELD OF THE INVENTION
[0002] The present invention relates to a no-spill cup assembly
with an improved valve mechanism to prevent liquid from flowing out
of the cup when not desired.
BACKGROUND OF THE INVENTION
[0003] No-spill cup assemblies are well known in the art. In the
past, a variety of such assemblies have been developed and
marketed. In general, the goal of a no-spill cup is to provide a
construction which minimizes or prevents liquid from emerging out
of the cup when liquid flow is not desired, i.e. when the user is
not drinking. However, though the assemblies of the prior art are
intended to avoid such accidents, their construction is such that
they generally do not provide a secure enough protection against
undesirable spilling or leakage. Thus, when such cups are inverted,
or more significantly, when they are shaken vigorously, liquid will
often emerge from them. This can be a particular problem with young
children, for whom these cups are usually intended. Accordingly,
there is a need in the art for an improved cup assembly for
preventing undesired spilling of liquids.
SUMMARY OF THE INVENTION
[0004] It is an object of the present invention to provide an
improved no-spill cup assembly.
[0005] It is a further object of the present invention to provide a
cup assembly which prevents liquid from flowing out of the cup when
the user is not drinking.
[0006] It is a further object of the invention to provide a cup
assembly which minimizes and/or eliminates accidental or
undesirable liquid flow or spillage out of the cup.
[0007] It is a further object of the invention to provide a cup
assembly which provides the ability to regulate the flow rate of
liquid out of the cup.
[0008] It is a further object of the invention to provide a cup
assembly which can be used by young children, to avoid accidental
spilling of liquid therefrom.
[0009] Further objects of the invention will become apparent in
conjunction with the disclosure herein.
[0010] In accordance with the invention, an improved cup
construction and valve assembly is provided which provides an
extremely secure seal against accidental liquid flow from the cup
spout. Further to the invention, a user places his or her mouth
against the spout of the cup assembly to suck liquid out of the cup
when desired. The act of sucking at the spout of the cup creates
negative pressure or a partial vacuum against a valve in the cup
spout, causing the valve to invert, or turn inside out, either
partially or totally, thereby unblocking an opening such as an
orifice or slit in the valve. Once the opening is unblocked, liquid
can flow freely through the valve and spout.
[0011] In contrast, when not in use, the valve sits in a resting,
closed position, with the valve pressed against the center
seal-off, thereby sealing off the opening or slit in the valve
assembly. Thus, in its relaxed state, with no negative pressure
applied, the valve sits in a closed position with the fluid opening
sealed by the center seal-off. Moreover, in accordance with the
dual valve nature of the device in the preferred embodiment, an
adjacent valve similarly seals when no negative pressure is
applied, thereby blocking off the air vents in the cover of the
cup, and further preventing the possibility of fluid flow.
Consequently, the closed position provides an extremely secure seal
against fluid leakage, such that inadvertent spills or even
deliberate attempts to force liquid outside of the cup, such as by
turning the cup upside down, or shaking the cup, are
ineffective.
[0012] In a further embodiment of the invention, the cup assembly
allows liquid flow to be regulated between regular or maximum flow
and minimal flow levels or rates by rotating the position of a
valve assembly in the cap or cover of the cup. The valve holder is
constructed as a two subunit assembly, with one subassembly holding
a valve with a larger slit or orifice for fluid flow than the valve
in the second subunit. Thus, upon rotation of the valve holder,
either a low-flow valve or a higher flow valve can be positioned in
the hole leading to the spout. In this manner, a dual position
valve assembly is provided allowing either regular flow or minimal
liquid flow conditions.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1(a) is an exploded front view of a no-spill cup
assembly in accordance with the present invention. FIG. 1(b) is an
exploded perspective view of the no-spill cup assembly of FIG.
1(a).
[0014] FIG. 2(a) is an exploded front view of a second embodiment
of a no-spill cup assembly in accordance with the present
invention. FIG. 1(b) is an exploded perspective view of the
no-spill cup assembly of FIG. 2(a).
[0015] FIG. 3 is a perspective view of the valve assembly of the
present invention.
[0016] FIG. 4 is an exploded, perspective view of another
embodiment of the valve assembly of the no-spill cup, in accordance
with the present invention.
[0017] FIG. 5(a) is an exploded front view of the cup assembly of
the present invention, showing the rotation of the valve holder or
assembly, into two alternate positions for placement in the cap or
cover of the cup. FIG. 5(b) is an exploded perspective view,
showing the placement of the valve holder into the cap, in either
of the two positions illustrated in FIG. 5(a).
[0018] FIG. 6 is a series of additional views of the valve holder
or assembly of FIG. 3. FIG. 6(a) is a top view of the valve holder.
FIG. 6(b) is a front view of the valve holder. FIG. 6(c) is a side
view of the valve holder. FIG. 6(d) is a cross-sectional view of
the valve holder wherein the valve is in a relaxed state, sealing
off fluid flow. FIG. 6(e) is a cross-sectional view of the valve
holder, showing the valve in an inverted state, to allow fluid flow
through the valve.
[0019] FIG. 7 is an exploded, perspective view of another
embodiment of the valve assembly of the no-spill cup, in accordance
with the present invention.
[0020] FIG. 8 is a series of additional views of a further
embodiment of the valve assembly shown in FIG. 6. FIG. 8(a) is a
top view of the valve holder or assembly. FIG. 8(b) is a front view
of the valve holder. FIG. 8(c) is a side view of the valve holder.
FIG. 8(d) is a cross-sectional view of the valve holder wherein the
valve is in a relaxed state, sealing off fluid flow. FIG. 8(e) is a
cross-sectional view of the valve holder, showing the valve in an
inverted state, to allow fluid flow through the valve.
[0021] FIG. 9 is a series of additional views of another embodiment
of the valve assembly shown in FIG. 8. FIG. 9(a) is a top view of
the valve holder or assembly. FIG. 9(b) is a front view of the
valve holder. FIG. 9(c) is a side view of the valve holder. FIG.
9(d) is a cross-sectional view of the valve holder wherein the
valve is in a relaxed state, sealing off fluid flow. FIG. 9(e) is a
cross-sectional view of the valve holder, showing the valve in an
inverted state, to allow fluid flow through the valve.
[0022] FIG. 10 is a side view of a no-spill cup with a soft
gripping area, in accordance with the present invention.
[0023] FIG. 11 is a series of additional views of another
embodiment of the cap of the present invention. FIG. 11(a) is a
partial sectional view of a cap with an insert molded or glued in
gasket, in accordance with the invention. FIG. 11(b) is a side
sectional view of the cap of FIG. 11(a). FIG. 11(c) is a top
sectional view of the cap of FIG. 11(b).
[0024] FIG. 12 is a series of additional views of another
embodiment of the cap of the present invention. FIG. 12(a) is a
partial sectional view of a cap with a molded lip which wedges
against into the inside surface of the cup, in accordance with the
invention. FIG. 12(b) is a side sectional view of the cap of FIG.
12(a). FIG. 12(c) is a top sectional view of the cap of FIG.
12(b).
[0025] FIG. 13 is a side sectional view of a cap having a soft
spout, in accordance with a further embodiment of the
invention.
[0026] FIG. 14 is a side sectional view of a cap having a reduced
volume spout, in accordance with a further embodiment of the
invention.
DETAILED DESCRIPTION OF THE INVENTION AND THE PREFERRED
EMBODIMENTS
[0027] As will be shown in conjunction with the attached drawings,
a novel cup assembly is disclosed for providing prevention against
accidental liquid spills. FIGS. 1(a) and 1(b) are a front view and
a perspective view, respectively, of an embodiment of the cup
assembly, in accordance with the present invention. The volume of
the cup or liquid holding portion of the assembly can be adjusted
as desired. In one embodiment, a 7 oz. drinking cup is provided, as
shown in FIG. 1. Alternatively, a 9 oz. drinking cup, as shown in
FIG. 2, a 61/2 oz. cup, or any other desired size can be provided,
as well.
[0028] The sides of the cup can be provided with no handles, one
handle, two handles or any other number of handles, for the user's
use to grip the cup. This handle or handle is preferably sized for
a child's hands. In addition, the outside appearance of the cup
and/or the cap can be a solid color, or can be printed with any
desired design.
[0029] In a further embodiment of the invention, a no spill cup
with a soft gripping area can be provided, as shown in FIG. 10. In
accordance with this embodiment, a soft ring 102 is provided around
the outside of the cup. This ring can be of any width desired, and
serves as a finger grip, to make it easier to grasp the cup
securely. Preferably, the ring is approximately two inches (2")
wide. In a preferred embodiment, the soft ring 102 has shapes or
designs 106 cut out of it, such as stars, ovals, or so forth. The
hard cup, in turn, has raised areas or protuberances corresponding
to those shapes or designs. The soft ring fits snugly over these
raised areas of the cup, each of the protruding hard shapes fitting
into the cutouts of the soft ring, with the surface of the raised
areas and the soft ring being flush when the ring is inserted onto
the cup.
[0030] In one embodiment of the invention, the cup is constructed
from polycarbonate. In an alternate embodiment, the cup is
constructed from polypropylene. If desired, clear polypropylene can
be utilized. Alternatively, any other suitable materials can be
used for the components of the no-spill cup. The components of the
cup are all made of durable materials, resistant to breakage,
dishwasher safe, and preferably color fast.
[0031] In accordance with the invention, cup 7 includes a no-spill
cap or cover 11, a valve holder or assembly 31 and tumbler cup 22.
No-spill cap 11 includes a spout 14 for drinking liquid from the
cup. The spout is sized to allow an individual to place his or her
mouth over the spout to drink therefrom. In the preferred
embodiment, the spout is sized for the mouth of a child,
particularly for a child of a young age.
[0032] No-spill cap 11 forms a cover for placement over tumbler cup
22. When attached to the cup 22, a secure seal is formed such that
no liquid can emerge through the connection between the cap 11 and
cup 22. In use, cap 11 is sufficiently secured to cup 22 such that
shaking the cup assembly, dropping the cup on the floor, or other
vigorous movement of the cup assembly, or application of sharp
force thereto, is insufficient to separate the cap from the
cup.
[0033] In one embodiment, no-spill cap 11 and tumbler cup 22
include mating male and female screw threads, such that the cap 11
is a screw-on cap which can be easily rotated onto the tumbler cup
22, as shown in FIG. 2. In an alternative embodiment, a snap-on cap
is used, as shown in FIG. 1. In this embodiment, a resilient ring
portion of cap 11 securely fits over lip 10 of tumbler cup 22, as
is well known in the art. Although a screw-on cap or a snap-on cap
are shown as two preferred embodiments, alternatively, any other
suitable mechanism to secure the cap to the tumbler cup can be
utilized.
[0034] Either the screw-on cap and/or the snap-on cap can be
further provided with a gasket 110 between the tumbler cup and the
cap, to further seal the connection between the cup and the cap.
This gasket can be part of the tumbler cup 22 or the cap 11, or can
be a separate element inserted between the cap and the cup. In a
preferred embodiment, the gasket 110 is part of cap 11, as shown in
FIGS. 11(a)-(c).
[0035] Alternatively, the cap can be provided with a small annular
inner lip, on the inside of the cap, which acts as a gasket. This
lip, as shown in FIGS. 12(a)-(c), wedges inside the cup when the
cap is screwed or placed upon it. The lip acts to further prevent
the possibility of liquid flow through the contact between the cup
and the cap.
[0036] In a preferred embodiment, finger grips are provided on the
outside of the cap, such as grooves or the like. These grips
facilitate removal and application of the cap, particularly in
embodiments requiring the screwing of the cap on and off of the
cup.
[0037] The cap is also preferably interchangeable with numerous
tumbler cups of different sizes. In this embodiment, the rim of the
tumbler cups are all of the same diameter, although the tumbler
cups themselves are of different volumes. For example, the same
sized cap could be used on a 61/2 oz. cup and/or a 7 oz. cup and/or
a 9 oz. cup, and so forth.
[0038] In a further embodiment of the cap, the cap has a soft spout
130 as shown in FIG. 13. Preferably, the spout is made of a
thermo-elastimer. Spout 130 can be insert molded to a polypropylene
cap, providing a combination cap having a hard section for
attachment to the cup, and a soft spout portion. Preferably, the
spout has a small channel extending therethrough to reduce the
liquid volume which can be trapped within the spout portion.
[0039] In a further embodiment of the cap, the cap has a reduced
volume spout as shown in FIG. 14. Reduced volume spout 140 is
designed to reduce the volume of liquid which can be trapped within
the spout. Reduced volume spout 140 has a volume reduction member
144 inserted therein to reduce the internal volume of the spout,
and to provide a channel 148 for liquid flow. Preferably, valve
assembly subunit 142 extends up into spout 140 to further reduce
the amount of liquid which can be trapped in spout 140. Valve
assembly subunit 142 can, for example, extend into volume reduction
member 144. Accordingly, this embodiment reduces the space between
the valve and the opening of the drinking spout, to reduce the
amount of liquid potentially trapped in this area.
[0040] As shown in FIG. 1(b), no-spill cap 11 includes valve
assembly carriers 16 and 18. In the preferred embodiment, valve
assembly carriers 16 and 18 are tapered holes provided on the
underside of the cap. Valve assembly carrier or tapered hole 18
leads to an open spout 14, providing a path for liquid flow. Thus,
valve assembly carrier or hole 18 is fully open on both sides, both
on its top surface, which leads to spout 14, and on its bottom
surface opposite tumbler cup 32, for the flow of liquid out of
tumbler cup 22 through hole 18 and through spout 14 into the user's
mouth.
[0041] Valve assembly carrier or tapered hole 16, in contrast,
provides a passage for the flow of air into the cup during use,
allowing liquid to exit through opposing hole 18 and spout 14. Hole
16 is open on one side, i.e. on its lower surface opposite tumbler
cup 22. On the opposing side, hole 16 merges into the inner surface
of cap 11. The inner surface of cap 11 is further provided with one
or more, preferably small, vents or holes for air flow, allowing
air to flow through the vents of cap 11 and through hole 16 into
the cup assembly during use.
[0042] As shown in FIGS. 1 and 2, no-spill cup 7 further includes
valve holder or assembly 31. Valve holder 31 is preferably
constructed from a high temperature ABS material, and is
dimensioned to fit snugly into cap 11. In the preferred embodiment,
valve holder is a separate assembly which fits into cap 11.
Alternatively, the valve holder can be provided as an integral part
of cap 11 and/or cup 7. For example, valve holder 31 can be molded
as a part of cap 11, such that the valve holder is inseparable from
the cap.
[0043] In the preferred embodiment, valve holder 31 is a
two-subunit assembly connected by bridge 34. Each subunit of the
two-subunit assembly is sized to frictionally fit into and be held
by either one of tapered holes 16 and 18. The spacing between
tapered holes 16 and 18 is the same as between the subunits of
valve holder 31, such that the valve holder can be easily secured
within cap 11. The sizing and tapering of holes 16 and 18 and the
sizing of valve holder 31 are dimensioned so as to provide a
secure, snug mating between the valve assembly and the tapered
holes. In a preferred embodiment, the top of the valve holder (i.e.
the side facing the spout) and the bottom of the valve holder (i.e.
the side facing the cup) has two different diameters. The top is
proportioned to fit snugly into the tapered hole, and the bottom is
proportioned such that it cannot be inserted into hole 16 or 18. In
this way, a mechanism is provided to prevent the valve holder from
being inserted into the holes in the wrong orientation, i.e. upside
down.
[0044] FIG. 3 is an enlarged, exploded, perspective view of the
valve holder of the present invention. Valve holder 31 consists of
two valve holder subunits 37 and 39, connected by a bridge 34. Each
valve holder subunit is intended to hold a single valve therein. As
shown in the figure, valve or valve member 42 is intended for
placement in subunit 37, and valve or valve member 45 is intended
for placement in subunit 39. Valves 42 and 45 each include a slit
for the passage of liquid. The slit is preferably through the
center portion of the valve, and is dimensioned to allow a
predetermined flow level or rate of liquid therethrough, as
desired.
[0045] Valve holder subunits 37 and 39 open into sealing units 37a
and 39(a) and valve retainers or endcaps 37b and 39(b),
respectively. Taking subunit 37 as an example of the function of
each subunit, as shown in FIG. 3, subunit 37 is initially in an
open position in which the sealing unit and the valve retainer have
been pulled or hinged apart. In one embodiment, the sealing unit
and the valve retainer have a tab 60 connecting them, to prevent
the components from being permanently separated accidentally.
Alternatively, the valve retainer can be welded into place (e.g. by
sonic welding), as shown in FIGS. 4 and 7. The sealing units each
have at least one open section 58, such that, in the valve
assembly's disassembled state, fluid can pass, unobstructed,
through the sealing unit since no valve is in place. Likewise, the
valve retainers are open on both sides for unobstructed passage of
fluid through the valve retainer in the disassembled state when no
valve is in place.
[0046] To assemble the valve assembly, valve 42 is inserted into
the valve holder by placement of the valve between sealing unit 37a
and valve retainer 37b. After a valve has been placed into one or
both of the subunits, the valve retainers can each be folded or
hinged back about tab 60, over the sealing unit 37 (or under
sealing unit 39, in the orientation shown in the figure) and
snapped into place to close the subunits, as shown in FIG. 5. The
resilience of the sealing unit allows for a tight seal to be
established between the valve retainer and the sealing unit. When
closed, each subunit secures or encapsulates a valve tightly
therein, maintaining the valve in place in the valve holder. For
clarity, reference is primarily made to subunit 37, although
subunits 37 and 39 are preferably the same in all features other
than the size of the valve opening. For the purposes of the present
discussion, it is assumed that subunit 37 is the subunit intended
for initial placement into hole 18.
[0047] As shown in FIGS. 5, 6, 8 and 9, upon closing a subunit
(e.g. subunit 37 in FIG. 3), valve 42 sits securely against center
seal-off stop or center stop 52 in sealing unit 37a, with the
opening 70 in valve 42 being flush against center seal-off stop 52.
Valve 42 includes a top, proximal side which will face the spout of
the cap, and a distal side which rests against the center seal-off
stop when the valve is placed in valve holder 31.
[0048] Center stop 52 functions as a sealing portion or blocking
element of the valve assembly which seals off and blocks the flow
of fluid through the valve. In a preferred embodiment, center stop
52 consists of a solid central area or portion 56 which is
impenetrable to the flow of liquid therethrough. Surrounding the
central area or portion 56 is preferably a peripheral area or
region 58, having open areas such as slots or so forth, for
allowing the passage of liquid therethrough, as shown, for example
in FIG. 8(a). Central area 56 or center stop 52 further includes
stems 74. As shown in FIG. 9, stems 74 can further be reinforced
with braces 72, which are reinforcing elements, which provide
additional material strength to the connection between the stems
and the valve holder.
[0049] When in the normal resting position, valve 42 relaxes to sit
securely against the center stop 52, as shown in FIG. 8(d). In this
resting position, opening or orifice 70 of valve 42 presses firmly
against the central area 56 of center stop 52, preventing any fluid
flow through the valve, and maintaining the valve in a closed
configuration.
[0050] To drink from the cup, a user raises the cup to his or her
mouth and begins to suck liquid through spout 14. In the process,
the user creates negative pressure or a partial vacuum against the
top of valve 42 in subunit 37. Valve 42 is constructed of a
flexible material which is designed to fully invert and turn inside
out, or to begin to invert and turn inside out, upon creation of a
partial vacuum against the top of the valve 42, as shown in FIG.
8(e). For example, valve 42 can be a membrane, either in whole or
in part. Preferably, the valve is constructed of Kraton or
silicone. If silicone is used, a 45 durometer silicone such as Lims
6045 is preferred, which is available from General Electric or from
Wacker (a subsidiary of Bayer) of Germany. The materials used for
the valve assembly and its components are sufficiently durable and
heat resistant that the entire valve assembly can be placed in a
dishwasher or boiled.
[0051] In a preferred embodiment, the valve material is constructed
of a single material with a greater thickness of material on the
center area which seals off on the center stop, and with a thinner
portion of material on the sidewalls. Providing a thinner sidewall
portion contributes to the flexibility of the valve at its edges,
which further assists and encourages inversion of the valve, by
causing the valve to flex at the sidewalls first upon application
of negative pressure thereto. Preferred dimensions for the valve
thickness are approximately 0.4 mm of thickness on the sidewalls
and approximately 0.9 mm of thickness on the center area.
[0052] Upon inversion of valve 42, opening or orifice 70 is
displaced away from central area 56 of center stop 52. The
inversion of the valve therefore unblocks opening 70 allowing fluid
flow through the subunit. As negative pressure is being applied to
the top of the valve 42 located next to the spout, negative
pressure is likewise being applied to the bottom of the adjacent
valve in the other subunit, located in the other tapered hole of
the cup cover. Thus, this negative pressure, opens the second valve
as well, by displacing the opening in the other valve away from its
center stop. Inversion of valves 42 allows fluid flow to proceed
through both subunits of the assembly. Liquid will flow through one
subunit of the valve assembly, the subunit connected to the spout,
concurrently accompanied by air flow through the other subunit of
the assembly, the subunit connected to the air vents. In this
manner, liquid smoothly and easily flows though the valve assembly,
the spout, and out of the cup.
[0053] In a preferred embodiment, the valve assembly is further
provided with a flow bridge 84. Flow bridge 84 blocks movement or
expansion of the valve 42 beyond a certain maximum distance to
prevent the valve from overextending itself, or from being
subjected to excessive strain or distension, as shown in FIG. 8(e).
Thus, the flow bridge prevents the valve from inverting beyond the
point where it can no longer easily revert to its original
position. In addition, the flow bridge provides a shield or a
barrier preventing the valve from damage. Thus, it blocks objects
such as a spoon or so forth, whether in a dishwasher or otherwise,
from easily damaging the valve.
[0054] When negative pressure is released or removed from the
spout, the valve reverts back to its resting position, and fluid
cannot flow through the closed slit in the valve. In the resting
position, no liquid will spill from or emerge out of the cup.
[0055] Further embodiments of the valve holder and assembly are
shown in FIGS. 4 and 7-9. As shown in FIG. 4, instead of the valve
retainer shown in FIG. 3, a detachable snap fit valve retainer 81
can alternatively be provided. Or, as shown in FIG. 7, valve
retainer 94 can be provided as well. Valve retainers 81 and 94
serve the same function as valve retainers 37b and 39(b), holding
and securing the valve within the valve assembly. It is preferred
that the valve retainer, whichever embodiment is utilized, be sonic
welded on, to ensure that the valve cannot be dislodged or removed
from the holder.
[0056] Thus, in accordance with the invention, a system is provided
for maintaining a tight seal against fluid flow when the cup is not
in use. An extremely secure seal is provided, such that excessive
or vigorous shaking is ineffective to force fluid out of the cup.
Significantly, the valve construction disclosed results in a much
tighter seal than that observed in the no-spill cup assemblies of
the prior art. In accordance with the invention, unless the user
sucks through the spout, no liquid will flow through the valve.
[0057] In the preferred embodiment, subunits 37 and 39 are
preferably identical in all respects excepts for the size of the
orifice or slit in valve 42 and the slit in valve 45. It is
preferred that one valve be provided with a larger opening than the
other valve, such as a longer slit in one valve than the other. In
one embodiment, one valve is provided with an opening in the form
of a slit of approximately two hundred thousandths ({fraction
(200/1000)}) of an inch in length, while the second valve is
provided with a slit of approximately fifty thousandths ({fraction
(50/1000)}) of an inch. Alternatively, other lengths may, of
course, be used as well in accordance with the invention.
[0058] By varying the size and/or shape of the opening in the
valve, the present inventor has further provided a novel dual
acting flow system for regulating fluid flow. In this system, the
level of flow of liquid out of the cup during use can be easily
regulated. Regulation is accomplished by a simple rotation of the
valve assembly which converts the cup between a faster or higher
liquid flow, and a slower or lower flow system.
[0059] As shown in FIG. 5, valve holder 31 can be inserted into cap
11 in either of two configurations. In a first configuration, valve
45, having a larger opening or slit, is placed into hole 18, the
hole in communication with spout 14. In this configuration, a
first, higher, flow level of liquid through the valve is
established when the user sucks liquid through the spout, due to
the use of the valve having the larger opening therein. By removing
the valve holder 31 from holes 16 and 18, and flipping the valve
holder 31 one hundred eighty degrees (180.degree.), the other valve
42, having the smaller opening, can be inserted into hole 18. This
valve 42 provides a second, lower flow state, in which liquid can
still flow out of the spout, but at a lower flow rate than flow
through the first valve. In this way, the rate of flow of liquid
out of the cup can be regulated by a parent. Although a two level
flow system is disclosed, greater or fewer flow levels can be
provided by varying the number of attached subunits having valves
therein, or by providing replacement valve holders having different
sized openings 70 therein. In all configurations, however, liquid
only flows through the valve when the user sucks through the spout,
as disclosed above.
[0060] Any form of desired opening suitable for passage of a
desired level of liquid can be utilized in the valve. The opening
70 can be, for example, a slit, a slot, an orifice, a hole, or so
forth. Likewise, by the term opening, it is contemplated that
multiple openings of these or any other types can be provided as
well.
[0061] In one embodiment, the opening 70 is an "X" shaped slot 78,
as shown in FIG. 7. In another preferred embodiment, the opening is
a "T" shaped slot 76, as also shown in FIG. 7. Use of the X-shaped
slot 78 shown in FIG. 7, will provide a higher flow rate than the
T-shaped slot 76 shown therein. The flow rate, of course, depends
on the total length of the slots, or in general, on the size of the
opening. Accordingly, both the X-shaped slot and the T-shaped slot
can be used in a single valve assembly, each placed in its
respective subunit. In this preferred embodiment, a two level flow
system is provided, as previously discussed.
[0062] In a further embodiment, both openings are X-shaped, with
one opening larger than the other. A 7 mm opening (the length from
end to end of each crossbar of the "X") can be used for the fast
side, and a 6 mm opening for the slow side.
[0063] It is further preferred that the valve holder be marked to
indicate which subunit is suitable for higher flow, and which for
lower flow of liquid therethrough. Accordingly, the valve holders
can be explicitly marked "Fast" and "Slow" as shown in FIGS. 7 and
9, respectively. Alternatively, or additionally, the subunits or
the valve holders can be marked with a hare or rabbit, signifying
fast flow, and a tortoise or turtle, signifying slow flow, as
respectively also shown in FIGS. 7 and 9. The subunit connected to
the spout is, of course, the subunit which controls the liquid flow
rate. The valve holder can be marked, for example, on the subunit
itself, or on the bridge in an area directly adjacent to the
subunit, as shown in the figures. In one embodiment, the valve
holder is marked on the top and bottom (i.e. the sides facing the
spout and the cup, respectively), such that the symbols and/or
words can be seen from the top when the valve holder is being
inserted, and from the bottom, once it has already been inserted,
to determine which speed valve is in place in the spout. In an
alternate embodiment, the words and/or symbols are only on the
bottom of the valve, so that the user can see them from the bottom
when inserting the valve holder, and can also view the valve holder
from the bottom, once inserted.
[0064] Having described this invention with regard to specific
embodiments, it is to be understood that the description is not
meant as a limitation since further modifications may suggest
themselves, or may be apparent to those in the art. It is intended
that the present application cover all such modifications and
improvements thereon.
* * * * *