U.S. patent application number 09/812129 was filed with the patent office on 2001-10-04 for dispensing valve.
Invention is credited to Brown, Paul E., Socier, Tomothy R..
Application Number | 20010025862 09/812129 |
Document ID | / |
Family ID | 24022901 |
Filed Date | 2001-10-04 |
United States Patent
Application |
20010025862 |
Kind Code |
A1 |
Brown, Paul E. ; et
al. |
October 4, 2001 |
Dispensing valve
Abstract
A dispensing package is provided for fluid products such as
liquid soaps, shampoos and conditioners, household detergents,
cleaners, polishes, moisturizing creams, and the like, and includes
a container with a self-sealing dispensing valve mounted therein.
The valve includes a marginal portion, a head portion with a
discharge orifice therein, and a generally J-shaped connector
sleeve having one end connected with the marginal portion and the
opposite end connected with the head portion. The connector sleeve
has a resiliently flexible construction, with first and second leg
portions that are oriented at an acute included angle, and join one
another at an arcuate base portion to facilitate movement of the
head portion of the valve when dispensing product from the
container. A top dispense embodiment of the package has an inverted
J-shaped configuration at the top of the upper leg, which extends
arcuately into the head portion of the valve for dispensing
products from the top of the container.
Inventors: |
Brown, Paul E.; (Midland,
MI) ; Socier, Tomothy R.; (Essexville, MI) |
Correspondence
Address: |
ROCKEY, MILNAMOW & KATZ, LTD.
TWO PRUDENTIAL PLAZA, STE. 4700
180 NORTH STETSON AVENUE
CHICAGO
IL
60601
US
|
Family ID: |
24022901 |
Appl. No.: |
09/812129 |
Filed: |
March 19, 2001 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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09812129 |
Mar 19, 2001 |
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08886567 |
Jul 1, 1997 |
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08886567 |
Jul 1, 1997 |
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08508472 |
Jul 28, 1995 |
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5839614 |
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08508472 |
Jul 28, 1995 |
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08240264 |
May 10, 1994 |
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5439143 |
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08240264 |
May 10, 1994 |
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08039896 |
Mar 30, 1993 |
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5339995 |
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08039896 |
Mar 30, 1993 |
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07804086 |
Dec 6, 1991 |
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5213236 |
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Current U.S.
Class: |
222/185.1 ;
222/490; 222/494 |
Current CPC
Class: |
B65D 47/2031 20130101;
Y10T 137/788 20150401; F16K 15/147 20130101 |
Class at
Publication: |
222/185.1 ;
222/490; 222/494 |
International
Class: |
B67D 005/06 |
Claims
The embodiments of an invention in which an exclusive property or
privilege is claimed are defined as follows:
1. A dispensing package for fluid products, comprising: a container
shaped to retain a selected fluid product therein, and having a
discharge opening; and a dispensing valve for controlling the flow
of the fluid product from said container, having a marginal portion
sealing about the discharge opening of said container, a head
portion including a central area with an orifice which opens to
permit fluid flow therethrough in response to a predetermined
discharge pressure within said container, and closes to shut off
fluid flow therethrough upon removal of the predetermined discharge
pressure, and a generally J-shaped connector sleeve having a
resiliently flexible construction with a first leg portion thereof
connected with said marginal portion, and a second leg portion
thereof connected with said head portion; said first and second leg
portions being mutually oriented at an acute included angle, and
joining one another at an arcuate portion which facilitates
movement of said head portion when dispensing product from said
container.
2. A dispensing package as set forth in claim 1, wherein: said
first leg portion of said connector sleeve is shorter than said
second leg portion of said connector sleeve.
3. A dispensing package as set forth in claim 2, wherein: said
connector sleeve has a substantially uniform thickness between
opposite end portions thereof.
4. A dispensing package as set forth in claim 3, wherein: said head
portion has an axial centerline extending through said central area
thereof; and said second leg portion of said connector sleeve is
oriented at an acute angle relative to the axial centerline of said
head portion.
5. A dispensing package as set forth in claim 4, wherein: said
marginal portion of said valve includes a generally flat outer edge
oriented substantially parallel with the axial centerline of said
head portion.
6. A dispensing package as set forth in claim 5, wherein: said
first leg portion of said connector sleeve is oriented at an acute
angle to the axial centerline of said head portion.
7. A dispensing package as set forth in claim 6, wherein: said
arcuate portion of said connector sleeve has a quarter-circular
shape.
8. A dispensing package as set forth in claim 7, wherein: said
marginal portion has a generally triangular axial cross-sectional
shape.
9. A dispensing package as set forth in claim 8, wherein: said
marginal portions include opposite surfaces which taper inwardly
from said outer edge to said first leg portion.
10. A dispensing package as set forth in claim 9, wherein: said
orifice is positioned concentric with the axial centerline of said
head portion.
11. A dispensing package as set forth in claim 10, wherein: said
second leg portion of said connector sleeve has an inverted
J-shaped end portion which extends arcuately into said head portion
to further facilitate movement of said head portion when dispensing
product from a top portion of said container.
12. A dispensing package as set forth in claim 11, wherein: said
head portion has an outer edge disposed generally parallel with and
spaced radially inwardly from an adjacent upper portion of the
second leg of said connector sleeve.
13. A dispensing package as set forth in claim 1, wherein: said
connector sleeve has a substantially uniform thickness between
opposite end portions thereof.
14. A dispensing package as set forth in claim 1, wherein: said
head portion has an axial centerline extending through said central
area thereof; and said second leg portion of said connector sleeve
is oriented at an acute angle relative to the axial centerline of
said head portion.
15. A dispensing package as set forth in claim 1, wherein; said
head portion has an axial centerline extending through said central
area thereof; and said marginal portion of said valve includes a
generally flat outer edge oriented substantially parallel with the
axial centerline of said head portion.
16. A dispensing package as set forth in claim 1, wherein: said
head portion has an axial centerline extending through said central
area thereof; and said first leg portion of said connector sleeve
is oriented at an acute angle to the axial centerline of said head
portion.
17. A dispensing package as set forth in claim 1, wherein: said
arcuate portion of said connector sleeve has a generally
quarter-circular shape.
18. A dispensing package as set forth in claim 1, wherein: said
marginal portion has a generally triangular axial cross-sectional
shape.
19. A dispensing package as set forth in claim 1, wherein: said
head portion has an axial centerline extending through said central
area thereof; and said orifice is positioned concentric with the
axial centerline of said head portion.
20. A dispensing package as set forth in claim 1, wherein: said
second leg portion of said connector sleeve has an inverted
J-shaped end portion which extends arcuately into said head portion
to further facilitate movement of said head portion when dispensing
product from said container.
21. A dispensing valve for fluid product packaging of the type
having a container with a discharge opening therein, comprising: a
dispensing valve for controlling the flow of fluid product from the
container, having a marginal portion sealing about the discharge
opening of the container, a head portion including a central area
with an orifice which opens to permit fluid flow therethrough in
response to a predetermined discharge pressure within the
container, and closes to shut off fluid flow therethrough upon
removal of the predetermined discharge pressure, and a generally
J-shaped connector sleeve having a resiliently flexible
construction with a first leg portion thereof connected with said
marginal portion, and a second leg portion thereof connected with
said head portion; said first and second leg portions being
mutually oriented at an acute included angle, and joining one
another at an arcuate portion which facilitates movement of said
head portion when dispensing product from the container.
22. A dispensing package as set forth in claim 21, wherein: said
first leg portion of said connector sleeve is shorter than said
second leg portion of said connector sleeve.
23. A dispensing package as set forth in claim 21, wherein: said
connector sleeve has a substantially uniform thickness between
opposite end portions thereof.
24. A dispensing package as set forth in claim 21, wherein: said
second leg portion of said connector sleeve has an inverted
J-shaped end portion which extends arcuately into said head portion
to further facilitate movement of said head portion when dispensing
product from said container.
25. A dispensing package for fluid products, comprising: a
container shaped to retain a selected fluid product therein, and
having a discharge opening; and a dispensing valve for controlling
the flow of the fluid product from said container, having a
marginal portion sealing about the discharge opening of said
container, a head portion including a central area with an orifice
which opens to permit fluid flow therethrough in response to a
predetermined discharge pressure within said container, and closes
to shut off fluid flow therethrough upon removal of the
predetermined discharge pressure, and a resiliently flexible
connector sleeve having a first end portion thereof connected with
said marginal portion, and a second end portion thereof connected
with said head portion; said second end of said connector sleeve
having an inverted J-shape which extends arcuately into said head
portion to facilitate movement of said head portion when dispensing
product from said container.
26. A dispensing package as set forth in claim 25, wherein: said
head portion has an exterior surface which interfaces with ambient
environment and has a generally concave shape when viewed from
outside said container.
27. A dispensing package as set forth in claim 26, wherein: said
head portion has an interior surface which interfaces with the
fluid product in said container and has a center area and a
generally inclined outer portion which tapers inwardly toward said
center area, such that said exterior and interior surfaces converge
toward the central area of said head portion to provide a tapered
construction with reduced thickness adjoining said orifice.
28. A dispensing package as set forth in claim 27, wherein: said
head portion has an outer edge disposed generally parallel with and
spaced radially inwardly from an adjacent upper portion of said
connector sleeve.
29. A dispensing package as set forth in claim 28, wherein: said
connector sleeve has a generally linear medial portion disposed
between said first and second end portions.
30. A dispensing package as set forth in claim 29, wherein: said
medial and first end portions of said head portion collectively
form a J-shape.
31. A dispensing package for fluid products, comprising: a
container shaped to retain a selected fluid product therein, and
having a discharge opening; and a dispensing valve for controlling
the flow of the fluid product from said container, have a marginal
portion sealing about the discharge opening of said container, and
a head portion including a central area with an orifice which opens
to permit fluid flow therethrough in response to a predetermined
discharge pressure within said container, and closes to shut off
fluid flow therethrough upon removal of the predetermined discharge
pressure; said head portion having an exterior surface which
interfaces with ambient environment and has a generally concave
shape when viewed from outside said container, and an interior
surface which interfaces with the fluid product in said container
and has a center area and a generally inclined outer portion which
tapers inwardly toward said center area, such that said exterior
and interior surfaces converge toward the central area of said head
portion to provide a tapered construction with reduced thickness
adjoining said orifice.
32. A dispensing package as set forth in claim 31, wherein: said
valve includes a generally J-shaped connector sleeve having a
resiliently flexible construction with a first leg portion thereof
connected with said marginal portion, and a second leg portion
thereof connected with said head portion; said first and second leg
portions being mutually oriented at an acute included angle, and
joining one another at an arcuate portion which facilitates
movement of said head portion when dispensing product from said
container.
33. A dispensing package as set forth in claim 32, wherein: said
first leg portion of said connector sleeve is shorter than said
second leg portion of said connector sleeve.
34. A dispensing package as set forth in claim 33, wherein: said
connector sleeve has a substantially uniform thickness between
opposite end portions thereof.
35. A dispensing package for fluid products, comprising: a
container shaped to retain a selected fluid product therein, and
having a discharge opening; and a dispensing valve for controlling
the flow of the fluid product from said container, having a
marginal portion sealing about the discharge opening of said
container, and a head portion including a central area with an
orifice which opens to permit fluid flow therethrough in response
to a predetermined discharge pressure within said container, and
closes to shut off fluid flow therethrough upon removal of the
predetermined discharge pressure; said head portion having an
exterior surface which interfaces with ambient environment, and an
interior surface which interfaces with the fluid product in said
container; said exterior surface and said interior surface of said
head portion tapering inwardly toward said central area, such that
said exterior and interior surfaces converge toward the central
area of said head portion to provide a tapered construction with
reduced thickness adjoining said orifice.
36. A dispensing package as set forth in claim 35, wherein: said
valve includes a generally J-shaped connector sleeve having a
resiliently flexible construction with a first leg portion thereof
connected with said marginal portion, and a second leg portion
thereof connected with said head portion; said first and second leg
portions being mutually oriented at an acute included angle, and
joining one another at an arcuate portion which facilitates
movement of said head portion when dispensing product from said
container.
37. A dispensing package as set forth in claim 36, wherein: said
first leg portion of said connector sleeve is shorter than said
second leg portion of said connector sleeve.
38. A dispensing package as set forth in claim 37, wherein: said
connector sleeve has a substantially uniform thickness between
opposite end portions thereof.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] The present application is a continuation-in-part of
commonly assigned, co-pending United States patent application Ser.
No. 08/240,264, filed May 10, 1994, entitled DISPENSING PACKAGE,
which is a continuation of Ser. No. 08/804,086, filed Dec. 6, 1991
(now U.S. Pat. No. 5,213,236).
BACKGROUND OF THE INVENTION
[0002] The present invention relates to product packaging, and in
particular to a self-sealing valve for fluid products, and the
like.
[0003] Many different types of packages or containers are presently
available for packaging non-solid products of the type which are
capable of flowing, such as fluid or fluidized materials, including
liquids, pastes, powders, and the like, which substances are
collectively and generically referred to herein as "fluids". Some
such packages include a dispenser which. permits a selected amount
of fluid to be discharged from the package, and then reseals to
close the package.
[0004] Self-sealing dispensing valves have been used in packaging
for certain types of products, such as the container disclosed in
U.S. Pat. No. 4,728,006 to Drobish et al, which is designed for
shampoos, conditioners, and the like. However, such valves have
been known to experience some types of sealing problems, and
inconsistent dispensing characteristics, particularly when the
packages are exposed to significant temperature variations.
[0005] Valves constructed from most conventional plastic materials
cannot be used in at least certain types of packages, since they
either react with or adulterate the product. For instance, in food
packaging, care must be taken to avoid the use of valve materials
which might contain any type of toxin. Furthermore, active
ingredients in products can cause the valve to either embrittle or
soften, thereby ruining the designed flow rate and/or self-sealing
characteristics of the valve.
[0006] Liquid silicone rubber valves have recently been used in
some types of packaging, and have proven particularly advantageous
since the material is inherently quite inert, and will therefore
not either adulterate or react with the packaged product. Examples
of such packaging are provided in applicant's U.S. Pat. No.
5,033,655 to Brown. Although liquid silicone rubber possesses many
attributes for use in packaging, it also has other characteristics
which render such applications problematic. For example, the
surfaces of liquid silicone rubber parts are extremely tacky or
sticky, having a very high coefficient of friction. As a result, in
attempting to attach a dispensing valve to a container by a
conventional threaded collar arrangement, the surfaces of the valve
flange will stick tightly to the adjacent surfaces of the container
and collar before the collar can be tightened securely enough to
create a leak-resistant seal. Tightening of the collar often causes
the valve flange, as well as the entire valve to distort from its
designed shape, thereby preventing the formation of a secure seal,
and/or changing the intended dispensing and sealing characteristics
of the valve.
[0007] Another drawback associated with the use of liquid silicone
rubber in dispensing valves for product packaging is that there is
presently no available adhesive capable of connecting the valve to
a container in a manner that will withstand the operating pressures
to which the valve and container are repeatedly subjected. The
unique imperforate nature of the surfaces of the liquid silicone
rubber valve precludes the use of conventional adhesives. Hence,
the attachment of the liquid silicone rubber valve to a container
in a manner that will not leak, and will withstand repeated
pressurization and depressurization of the dispensing package is an
important consideration.
[0008] Another problem experienced with prior dispensing packages
relates to achieving a proper design balance between the package
container, valve, and fluid product, so that the product can be
repeatedly dispensed without requiring excess force, and will
neatly discharge only that amount of product which is desired by
the user, particularly in keeping with the type of product
involved. For instance, when dispensing highly concentrated fluid
products, such as hand soaps, and the like, the user will typically
require only a small amount or dollop of soap per application to
achieve satisfactory results. In contrast, when using other types
of fluid products, such as skin moisturizers, tanning formulas, and
the like, larger quantities of product are typically required by
the user for each application. The ability of the valve to quickly
and readily open in response to moderate pressure on the container
is important, as is the ability of the valve to quickly and
securely close when the pressure has been released. Also important
is the amount of pressure which must be maintained on the container
to sustain fluid through the valve once the valve is opened. The
ability to quickly and accurately achieve a proper balance between
all of these factors is very desirable in designing dispensing
packages.
SUMMARY OF THE INVENTION
[0009] One aspect of the present invention is a dispensing package
and associated valve for fluid products and the like, comprising a
container having the dispensing valve mounted therein. The
dispensing valve controls the flow of fluid product from the
container, and has a marginal portion sealing about a discharge
opening of the container. The valve also has a head portion
including a central area with an orifice which opens to permit
fluid flow therethrough in response to a predetermined discharge
pressure within the container, and closes to shut off fluid flow
therethrough upon removal of the predetermined discharge pressure.
The valve includes a generally J-shaped connector sleeve, having a
resiliently flexible construction with a first leg portion thereof
connected with the marginal portion, and a second leg portion
thereof connected with the head portion. The first and second leg
portions are mutually oriented at an acute included angle, and join
one another at an arcuate portion which facilitates movement of the
head portion of the valve when dispensing product from the
container.
[0010] Another aspect of the present invention is a dispensing
package and associated valve for fluid products and the like,
comprising a container having the dispensing valve mounted therein.
The dispensing valve controls the flow of fluid product from the
container, and has a marginal portion sealing about a discharge
opening of the container. The valve has a head portion including a
central area with an orifice which opens to permit fluid flow
therethrough in response to a predetermined discharge pressure
within the container, and closes to shut off fluid flow
therethrough upon removal of the predetermined discharge pressure.
The valve also has a resiliently flexible connector sleeve,
including a first end portion thereof connected with the marginal
portion, and a second end portion thereof connected with the head
portion. The second end of the connector sleeve has an inverted
J-shape which extends arcuately into the head portion to facilitate
movement of the head portion of the valve when dispensing product
from the container.
[0011] Yet another aspect of the present invention is a dispensing
package and associated valve for fluid products and the like,
comprising a container having the dispensing valve mounted therein.
The dispensing valve controls the flow of fluid product from the
container, and has a marginal portion sealing about a discharge
opening of the container. The valve has a head portion including a
central area with an orifice which opens to permit fluid flow
therethrough in response to a predetermined discharge pressure
within the container, and closes to shut off fluid flow
therethrough upon removal of the predetermined discharge pressure.
The valve also has a head portion including an exterior surface
which interfaces with ambient environment and has a generally
concave shape when viewed from outside the container, and interior
surface which interfaces with the fluid product in the container
and has a central area and a generally inclined outer portion which
tapers inwardly toward the center area, such that the exterior and
interior surfaces converge toward the central area of the head
portion to provide a tapered construction with reduced thickness
adjoining the orifice.
[0012] Yet another aspect of the present invention is a dispensing
package and associated valve for fluid products and the like,
comprising a container having the valve mounted therein. The
dispensing valve controls the flow of fluid product from the
container, and has a marginal portion sealing about a discharge
opening of the container. The valve has a head portion including a
central area with an orifice which opens to permit fluid flow
therethrough in response to a predetermined discharge pressure
within the container, and closes to shut off fluid flow
therethrough upon removal of the predetermined discharge pressure.
The head portion has an exterior surface which interfaces with
ambient environment, and an interior surface which interfaces with
the fluid product in the container. The exterior and interior
surfaces of the head portion taper inwardly toward the center area,
such that the exterior and interior surfaces converge toward the
central area of the head portion to provide a tapered construction
with reduced thickness adjoining the orifice.
[0013] The principal objects of the present invention are to
provide a dispensing package and an associated self-sealing valve
which are capable of easily and neatly dispensing a wide variety of
different types of fluid products. The self-sealing valve is
matched with both the container and the type of fluid product to be
dispensed, so as to quickly and securely seal, yet readily and
fully open when the user applies modest pressure to the container.
The valve includes a resiliently flexible connector sleeve which is
configured to apply a torque to the valve head which assists in
opening the orifice. The connector sleeve has sufficient
flexibility that pressure increases in the interior of the
container, such as those caused by thermal expansion, are offset by
shifting the valve head on the connector sleeve, so as to alleviate
excess pressure on the orifice. The connector sleeve is also
configured to provide sufficient flexibility that any misalignment
and/or distortion of the valve flange when attached to the
associated container are not transmitted to the valve head, thereby
permitting unhindered opening and closing of the orifice. The
connector sleeve is also configured to provide sufficient
flexibility that shock impact forces, and the like applied to the
container are absorbed by shifting the valve head on the connector
sleeve, so as to avoid inadvertent opening of the valve orifice.
The valve is configured to provide a generally constant flow rate
therethrough, even when exposed to a relatively wide range of
container pressures. For those products wherein a substantial
amount of material is typically dispensed per application, the
valve is configured such that once the orifice is shifted open, the
amount of pressure required to maintain fluid flow through the
orifice is reduced, so as to provide greater ease of operation,
without sacrificing secure sealing of the valve. The valve is
extremely versatile, and may be used in either top, bottom or side
dispensing packages to accommodate a wide variety of different
applications. The valve is very durable, while having reduced
manufacturing costs, and an uncomplicated design. The overall
package is efficient in use, economical to manufacture, capable of
a long operating life, and particularly well adapted for many
different proposed uses.
[0014] These and other advantages of the invention will be further
understood and appreciated by those skilled in the art by reference
to the following written specification, claims and appended
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a perspective view of a dispensing package
embodying the present invention, wherein a portion thereof has been
broken away to reveal a self-sealing valve mounted in a bottom
portion of an associated container.
[0016] FIG. 2 is a side elevational view of the dispensing package,
wherein a portion thereof has been broken away to reveal the valve,
which is shown in a fully retracted and fully closed position.
[0017] FIG. 3 is a side elevational view of the dispensing package,
wherein a portion thereof has been broken away to reveal the valve,
which is shown in a fully extended and fully open position.
[0018] FIG. 4 is an enlarged, fragmentary top view of the
valve.
[0019] FIG. 5 is an enlarged, side elevational view of the
valve.
[0020] FIG. 6 is an enlarged, cross-sectional view of the
valve.
[0021] FIG. 7 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in the
fully closed and fully retracted position.
[0022] FIG. 8 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully closed, and partially retracted position.
[0023] FIG. 9 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully closed and partially extended position.
[0024] FIG. 10 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully closed and fully extended position.
[0025] FIG. 11 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully closed and fully extended position, wherein a valve head
portion thereof is shown beginning to snap outwardly.
[0026] FIG. 12 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully closed, and fully extended position, wherein the valve head
portion of which is shown continuing to snap outwardly.
[0027] FIG. 13 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully open, and fully extended position, wherein the valve head
portion of which is shown snapped fully outwardly.
[0028] FIG. 14 is an enlarged, bottom plan view of the valve shown
in the position illustrated in FIG. 13.
[0029] FIG. 15 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully closed, and partially extended position abutting a container
closure.
[0030] FIG. 16 is an enlarged, cross-sectional view of the valve
installed in an associated container, with the valve shown in a
fully closed and fully extended position abutting an alternative
container closure.
[0031] FIG. 17 is an enlarged, fragmentary top plan view of another
dispensing valve embodying the present invention.
[0032] FIG. 18 is an enlarged, fragmentary bottom plan view of the
valve shown in FIG. 17.
[0033] FIG. 19 is an enlarged, cross-sectional view of the valve
shown in FIGS. 17-18.
[0034] FIG. 20 is an enlarged, vertical cross-sectional view of the
valve shown in FIGS. 17-19 installed in an associated top dispense
container, with the container in a fully upright orientation, and
the valve in a fully closed position.
[0035] FIG. 21 is an enlarged, vertical cross-sectional view of the
valve and associated top dispense container shown in FIG. 20, with
the container shown in an inverted orientation, and the valve in
its fully closed position.
[0036] FIG. 22 is an enlarged, cross-sectional view of the valve
and associated top dispense container shown in FIGS. 20-21, with
the container in the inverted orientation, and the valve in a
closed, partially extended position, wherein a valve head portion
is shown beginning to snap outwardly.
[0037] FIG. 23 is an enlarged, cross-sectional view of the valve
and associated top dispense container shown in FIGS. 20-22, with
the container in the inverted orientation, and the valve in a fully
open, and fully extended position, wherein the valve head portion
is shown snapped fully outwardly.
[0038] FIG. 24 is an enlarged, cross-sectional view of yet another
valve embodying the present invention.
[0039] FIG. 25 is an enlarged, cross-sectional view of yet another
valve embodying the present invention.
[0040] FIG. 26 is an enlarged, cross-sectional view of yet another
valve embodying the present invention.
[0041] FIG. 27 is an enlarged, cross-sectional view of yet another
valve embodying the present invention.
[0042] FIG. 28 is an enlarged, fragmentary, bottom plan view of yet
another valve embodying the present invention.
[0043] FIG. 29 is an enlarged, cross-sectional view of the valve
shown in FIG. 28.
[0044] FIG. 30 is an enlarged, cross-sectional view of yet another
valve embodying the present invention.
[0045] FIG. 31 is an enlarged, cross-sectional view of yet another
valve embodying the present invention.
[0046] FIG. 32 is an enlarged, cross-sectional view of yet another
valve embodying the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0047] For purposes of description herein, the terms "upper",
"lower", "right", "left", "rear", "front", "vertical",
"horizontal", and derivatives thereof shall relate to the invention
as oriented in FIGS. 1-3. However, it is to be understood that the
invention may assume various alternative orientations and step
sequences, except where expressly specified to the contrary. It is
also to be understood that the specific devices and processes
illustrated in the attached drawings, and described in the
following specification are simply exemplary embodiments of the
inventive concepts defined in the appended claims. Hence, specific
dimensions and other physical characteristics relating to the
embodiments disclosed herein are not to be considered as limiting,
unless the claims expressly state otherwise.
[0048] The reference numeral 1 (FIG. 1) generally designates a
dispensing package embodying the present invention. Dispensing
package 1 is particularly adapted for dispensing fluid products,
such as liquid soaps, household cleaners, polishes, moisturizing
creams, foodstuffs, and the like, and includes a container 2 with a
self-sealing dispensing valve 3 mounted therein. Valve 3 includes a
marginal flange 4, a valve head 5 with a discharge orifice 6
therein, and a connector sleeve 7, having one end connected with
valve flange 4, and the opposite end connected with valve head 5
adjacent a marginal edge thereof. Connector sleeve 7 has a
resiliently flexible construction, such that when pressure within
container 2 is raised above a predetermined amount, valve head 5
shifts outwardly (FIGS. 8-15) in a manner which causes connector
sleeve 7 to double over and then extend rollingly.
[0049] The container 2 illustrated in FIGS. 1-3 is particularly
designed for bottom dispensing, and includes a generally flexible,
oblong container body 12 supported on a substantially rigid base
13. Container body 12 is preferably integrally molded from an
appropriate synthetic resin material or the like, so as to create a
one-piece construction that includes oppositely oriented sidewalls
14 and 15, a top 16 and a bottom 17. The container sidewalls 14 and
15 are laterally flexible to pressurize and depressurize the
interior of container 2, and preferably have sufficient resilience
or stiffness that they automatically return to their original shape
upon release of any external forces which are applied to container
2 to dispense a fluid product 18 therefrom.
[0050] The container bottom 17 illustrated in FIGS. 2 and 3
includes a downwardly opening neck 20, which defines a discharge
opening 21 about which the marginal flange 4 of valve 3 is
positioned. As best illustrated in FIG. 7 and 8, the free end of
neck 20 includes an annularly shaped groove 22 having a general
L-shaped longitudinal cross-sectional configuration, which is
shaped to closely receive the marginal flange 4 of valve 3 therein.
Container base 13 includes a valve retainer ring 23 positioned
adjacent groove 22, and attached to container body 12 by a snap
lock arrangement 24. Container base 13 (FIGS. 2 & 3) has a
substantially flat bottom 25 adapted to abuttingly support
dispensing package 1 on an associated surface, such as a
countertop, sink, worksurface, or the like. Neck groove 22 is
located inwardly of the bottom 25 of container base 13, so as to
position valve 3 in a generally recessed condition within
dispensing package 1, as explained in greater detail
hereinafter.
[0051] With reference to FIGS. 4-6, the illustrated self-sealing
dispensing valve 3 has an integrally formed, one-piece
construction. Valve 3 has an interior side which interfaces with
the fluid product 18 in container 2, and an oppositely oriented
exterior side which interfaces with ambient environment. Valve 3 is
preferably molded from a resiliently flexible material, and in the
illustrated example comprises a silicone rubber which is
substantially inert so as to avoid reaction with and/or
adulteration of the fluid product being packaged. In one working
embodiment of the present invention, valve 3 is produced at
relatively high speeds through the molding of liquid silicone
rubber.
[0052] The illustrated marginal flange portion 4 (FIGS. 4-6) of
valve 3 has an annular plan shape, and a substantially L-shaped
cross-sectional configuration, comprising an inner edge 30, an
outer edge 31, a bottom 32, and a top 33 with an outer rim 34
upstanding therefrom. Marginal valve flange 4 has substantial
thickness between the bottom 32 and top 33 which is resiliently
compressed upon attachment of retainer ring 23 to form a secure
leak-resistant seal therebetween. The rim portion 34 of valve
flange 4 positively locks valve 3 in neck groove 22 to prevent any
radial movement therebetween.
[0053] The illustrated head portion 5 (FIGS. 4-6) of valve 3 has a
circular plan shape, and a generally tapered construction which is
thicker at the radially outside portion of valve head 5, and
thinner at the radially inside portion thereof. This tapered
construction assists in achieving the snap open/snap close action
of valve 3, as described below. More specifically, in the
illustrated example, valve head 5 has an exterior side or surface
38, which has an arcuately shaped side elevational configuration
which opens or curves outwardly, toward the exterior of dispensing
package 1, and is defined by a first, predetermined radius. Valve
head exterior surface 38 extends continuously between the interior
sidewalls of connector sleeve 7. Valve head 5 also includes an
interior side or surface 39, which has a marginal portion 40 with
an arcuately shaped side elevational configuration which opens or
curves outwardly, toward the exterior of dispensing package 1, and
is defined by a second predetermined radius. The radius of marginal
portion 40 on interior surface 39 is larger than that of exterior
surface 38, such that the two surfaces converge toward the center
of valve head 5 at or adjoining orifice 6, and provide the
above-noted inwardly tapered construction of valve head 5. The
interior surface 39 of valve head 5 also includes a center portion
41, which has a circular plan shape, with a substantially planar or
flat side elevational configuration, oriented generally
perpendicularly to discharge orifice 6. The center portion 41 of
valve head 5 assists in improving the opening and closing
characteristic of valve 3, as set forth below. The outer perimeter
of valve head 5 is defined by a circular marginal edge 42, which
begins at the outer edge 43 of marginal portion 40, and extends
outwardly therefrom with a slight outward taper, ultimately merging
into connector sleeve 7. The intersection of the marginal portion
40 and the center portion 41 of valve head 5 defines a circular
edge 44. The outside diameter of valve head 5, as measured along
marginal edge 42 is substantially smaller than the inside diameter
of marginal flange 4, as measured along inner edge 30. As explained
in greater detail below, this spacing between valve head 5 and
marginal flange 4 permits valve head 5 to shift freely in an axial
direction through the center of marginal flange 4.
[0054] The connector sleeve portion 7 illustrated in FIGS. 4-6 is
in the form of a rolling diaphragm, having a hollow circular plan
configuration, and a generally J-shaped longitudinal
cross-sectional shape, comprising a cylindrical sidewall portion
45, and a radially outwardly extending base portion 46. Connector
sleeve 7 has interior and exterior surfaces 47 and 48 respectively,
which are spaced equidistantly apart along the length thereof, such
that connector sleeve 7 has a substantially uniform thickness. One
end portion 49 of connector sleeve 7 is connected with the exterior
surface 38 of valve head 5 adjacent the marginal edge 42 thereof,
and the opposite end portion 50 of connector sleeve 7 is connected
with the inner edge 30 of marginal valve flange 4. The interior
surface 47 of connector sleeve 7 adjacent end 49 is positioned
substantially coplanar and contiguous with the marginal edge 42 of
valve head 5, while the opposite end 50 of connector sleeve 7 is
connected with marginal valve flange 7 at a medial portion of inner
edge 30, such that the base portion 46 of connector sleeve 7 flares
in a radially inwardly direction from marginal valve flange 46,-
and also protrudes outwardly toward the exterior of dispensing
package 1 at an arcuate portion 51 of connector sleeve 7. The
arcuately flared shape of connector sleeve portion 51 assists
connector sleeve 7 in first doubling over, and then rollingly
extending as valve head 5 shifts outwardly in the manner described
in greater detail below. The marginal attachment point of end 49 of
connector sleeve 7 to valve head 5, as well as its associated
geometry, increases the effectiveness of torque forces which assist
in snapping valve 3 open, as discussed hereinafter. The exterior
surface 48 of sleeve side wall 45 at end 49 of connector sleeve 7
intersects the exterior surface 38 of valve head 5 at an angle
which defines a circular edge 52. In the illustrated example, the
exteriormost area of sleeve arcuate portion 51 is disposed
substantially in-line with or slightly interior of the bottom 32 of
marginal flange 4, so as to facilitate fabrication. The length of
connector sleeve 7 is preferably selected sufficiently short to
prevent the same from folding in behind valve head 5 when valve
head 5 is in the fully extended position (FIGS. 10-14), thereby
avoiding interference with the retraction of valve head 5, which is
explained in detail below.
[0055] The illustrated one-piece valve 3 has a hat-shaped side
elevational configuration in its original, normal condition,
wherein valve head 5 assumes a generally concave shape. The
resilient flexibility of connector sleeve 7 permits the same to
double over and then extend rollingly in the manner described
hereinafter. Connector sleeve 7 acts as a rolling diaphragm with
valve head 5 mounted at the center thereof in a manner which
permits valve head 5 to shift or float freely inwardly and
outwardly in an axial direction with respect to the opening 21 in
container neck 20.
[0056] In the illustrated example, discharge orifice 6 (FIGS. 4-6)
has a cross-slit construction which includes two, intersecting
linear slits 55 and 56 that extend through the opposite sides 38
and 39 of center portion 41. The illustrated slits 55 and 56 are
oriented in a mutually perpendicular relationship, and have their
opposite ends 55a and 55b positioned slightly inwardly from the
outer edge 44 of center portion 41. Orifice slits 55 and 56 define
four flaps or pedals 57 which flex inwardly and outwardly to
selectively permit the flow of fluid product through valve 3. Slits
55 and 56 are preferably formed by slicing through the center
portion 41 of valve head 5, without removing any substantial amount
of material therefrom, so that the opposite side faces 58 and 59
(FIGS. 13 & 14) of valve flaps 57 closely seal against one
another when discharge orifice 6 is in its normally, fully closed
position. The length and location of slits 55 and 56 can be
adjusted to vary the predetermined opening and closing pressures of
valve 3, as well as other dispensing characteristics of dispensing
package 1. The side faces 58 and 59 of each valve flap 57 intersect
at their free ends to define an end edge 60. That portion of valve
head 5 disposed between marginal portion 40, marginal edge 42, slit
ends 55a and 55b, and exterior surface 38 defines a ring portion 61
of the valve head 5, which functions in the manner described in
detail hereinafter.
[0057] It is to be understood that orifice 6 may assume many
different shapes, sizes and/or configurations in accordance with
those dispensing characteristics desired. For example, orifice 6
may comprise a single slit, particularly when smaller or narrower
streams are desired. Orifice 6 may also include three or more
slits, particularly when larger or wider streams are desired,
and/or the fluid product contains aggregates, such as some types of
salad dressings, and the like. Other forms of orifice 6, such as
holes, duck bills, etc. may also be incorporated into valve 3.
[0058] Self-sealing dispensing valve 3 is preferably especially
configured for use in conjunction with a particular container 2,
and a specific type of fluid product, so as to achieve the exact
dispensing characteristics desired. For example, the viscosity and
density of the fluid product are both important factors in
designing the specific configuration of valve 3, as is the shape,
size, and strength of container 2, particularly when dispensing
package 1 is configured for bottom dispensing. The rigidity and
durometer of the valve material, and size and shape of both valve
head 5 and connector sleeve 7 are also important in achieving the
desire dispensing characteristics, and should be carefully matched
with both the container 2 and fluid material 18 to be dispensed
therefrom.
[0059] One working embodiment of the present invention is
particularly designed to dispense fluid household products
therefrom, such as dishwasher detergents, liquid soap, moisturizing
creams, foodstuffs, and the like. When such fluid product materials
are to be dispensed from a blow molded, polypropylene container
with valve 3 positioned at the bottom 4 thereof for bottom
dispensing, one specific valve 3 found to be particularly suited is
as follows. The outside and inside diameters of marginal valve
flange 4 are 0.7000 and 0.5802 inches respectively, while the
outside diameter of the marginal edge 42 of valve head 5 is 0.4391
inches, and the outside diameter of center portion 41 is around
0.2212 inches. The thickness of connector sleeve 7 is approximately
0.0130 inches, and has an overall height, as measured from the
bottom 32 of marginal flange 4 to the edge 52 of valve head 5, of
0.1159 inches. The radius of valve head exterior surface 38 is
0.2900 inches, while the radius of the marginal portion 40 of
interior surface 39 is 0.0350 inches. Hence, the total thickness of
valve head 5 at marginal edge 42 is around 0.0778 inches and around
0.0350 inches at the middle of center portion 41. The overall
height of valve 3, as measured from the bottom 32 of marginal
flange 4 to the top of center portion 41 is approximately 0.2402
inches. Slits 55 and 56 have a length of around 0.2200 inches, and
are centered squarely in valve center portion 41. The valve is
molded integrally from a liquid silicone rubber of the type
manufactured under the trademark "SILASTIC LSR" by Dow Corning
Corporation.
[0060] Experimental tests conducted on valves having the
above-identified specific dimensions and characteristics indicate
that valve 3 snaps open when exposed to a pressure inside container
2 equal to approximately 25-28 inches of water. That pressure which
causes valve 3 to snap open is generally referred to herein as the
predetermined dispensing or opening pressure. Valve 3 will
automatically snap closed when the interior pressure of container 2
drops below a pressure equal to approximately 16-18 inches of
water. That pressure which causes valve 3 to snap closed is
generally referred to herein as the predetermined closing pressure.
While the noted valve 3 is open, a substantially constant flow or
stream of fluid product is discharged through orifice 6, even when
extra pressure is exerted on container 2.
[0061] It is to be understood that according to the present
invention, valve 3 may assume many different shapes and sizes,
particularly in keeping with the type of container 2 and fluid
product to be dispensed therefrom. The predetermined opening and
closing pressures of valve 3 may be varied widely in accordance
with those dispensing criteria desired for a particular product.
Flow characteristics of the dispensed fluid product can also be
adjusted substantially, such as for relatively wide column-like
streams, thin needle-like streams, dollops, and the like.
[0062] In operation, dispensing package 1 functions in the
following manner. Valve 3 normally assumes the inwardly protruding
orientation illustrated in FIG. 7, wherein valve 3 remains
substantially in its original molded shape without deformation,
with connector sleeve 7 being fully retracted and discharge opening
6 being fully closed. When valve 3 is mounted in the bottom of
container 2, as is shown in the illustrated bottom dispensing
package 1, valve 3 is configured such that discharge orifice 6 will
remain securely closed, even under the hydraulic head pressure
applied thereto by the fluid product 18 when the container 2 is
completely full.
[0063] When additional pressure is communicated with the interior
of container 2, such as by manually flexing container sidewalls 14
and 15 inwardly, connector sleeve 7 functions as a rolling
diaphragm, and permits valve head 5 to begin shifting axially
outwardly toward the exterior of dispensing package 1 by doubling
over connector sleeve 7, which then in turn, begins to extend
outwardly in a rolling fashion, as illustrated in FIG. 8. The
outwardly protruding J-shaped configuration of connector sleeve 7
assists in initiating this rolling motion of connector sleeve 7.
The elastic deformation of connector sleeve 7 from its original
molded shape (FIG. 7), generates a complex pattern of stresses
within valve 3 which resiliently urges the same back into its
original or normal configuration, which forces include an outwardly
directed torque applied by connector sleeve 7 to valve head 5
adjacent marginal edge 42, which tends to resiliently urge
discharge orifice 6 toward its open position, as described in
greater detail below.
[0064] When additional pressure is communicated with the interior
of container 2, as illustrated in FIG. 9, valve head 5 continues to
shift axially outwardly by rolling connector sleeve 7 over upon
itself. The marginal edge 42 of valve head 5 passes through the
center of marginal valve flange 4.
[0065] When additional pressure is communicated with the interior
of container 2, valve head 5 continues to extend outwardly toward
the exterior of dispensing package 1 until connector sleeve 7 is
fully extended, as illustrated in FIG. 10. When valve heads are in
the fully extended position (FIG. 10), the stress forces built up
in connector sleeve 7 cause the sidewall portion 45 of the
connector sleeve 7 to assume a generally cylindrical shape
concentric with and about the marginal edge 42 of valve head 5.
Sidewall 45 of connector sleeve 7 is folded back 180 degrees from
its original molded shape, to an orientation parallel with the
marginal edge 42 of valve head 5, and defines an exterior lip or
rim 65.
[0066] When additional pressure is communicated with the interior
of container 2, as illustrated in FIG. 11, valve head S continues
to shift outwardly. However, since connector sleeve 7 is fully
extended, further outward shifting of valve head 5 longitudinally
tenses or stretches connector sleeve 7, thereby increasing the
outwardly directed torque applied to the valve head 5. Also, the
further outward movement of valve head 5 tends to flatten or
straighten valve head 5, particularly along the exterior surface 38
thereof, as best illustrated in FIG. 11. This flattening motion
tends to enlarge or dilate the circular plan configuration of valve
head 5, which enlargement is in turn resisted by radially inwardly
directed forces applied to the marginal edge 42 of valve head 5 by
connector sleeve 7, thereby generating another complex pattern of
stresses within valve 3, which forces include those which tend to
compress valve head 5 in a radially inward direction. Due to the
tapered shape of valve head 5, the majority of compression strain
is believed to take place adjacent the center portion 41 of valve
head 5. As best illustrated by a comparison of the broken line
figure and the full line figure provided in FIG. 11, when connector
sleeve 7 is in the fully extended position, as shown in the broken
lines, and additional pressure is communicated with the interior
side 39 of valve 3, exterior rim 65 moves axially outwardly and
radially outwardly as shown in the full lines of FIG. 11. The
marginal edge 42 of valve head 5 is shown bent or elastically
deformed inwardly as a consequence of the torque forces applied
thereto by connector sleeve 7.
[0067] When additional pressure is communicated with the interior
of container 2, as illustrated in FIG. 12, valve head 5 continues
to shift outwardly by further longitudinal stretching of connector
sleeve 7, and further enlargement of the plan shape of valve head
5. This motion is best illustrated by a comparison of the broken
line figure and the full line figure provided in FIG. 12. Exterior
rim 65 moves from the condition illustrated in FIG. 11, which
corresponds to the broken line figure of FIG. 12, in an axially
outwardly and radially outwardly fashion to the position shown in
the full lines of FIG. 12. The marginal edge 42 of valve head 5 is
shown more bent or elastically deformed inwardly, as a consequence
of the increased torque forces applied thereto by connector sleeve
7. These combined forces and motions also serve to further compress
valve head 5 into a state of bifurcation, as illustrated in FIG.
12, wherein the combined forces acting on valve head 5 will, upon
application of any additional outward force on the interior side 39
of valve 3, cause the same to quickly open outwardly with a
snapping motion to separate valve flaps 57 in the manner
illustrated in FIGS. 13 and 14, and thereby dispense liquid product
through discharge orifice 6. The bifurcation state of valve 3, as
the term is used herein, is illustrated in FIG. 12, and defines a
relatively unstable condition which valve 3 assumes immediately
prior to opening into the fully open condition shown in FIGS. 13.
and 14. As valve 3 passes through the bifurcation state shown in
FIG. 12, the combined forces acting on valve head 5 are in a very
temporary, unstable condition of equilibrium for a given moment,
and then quickly shift valve head 5 into a generally convex shape,
simultaneously opening orifice 6. In the bifurcation state shown by
the full lines in FIG. 12, valve head S assumes the shape of a
nearly planar disc, with exterior surface 38 cupped inwardly
between rim 65 and flap edges 60, and interior surface 39 bent
slightly outwardly toward the center of orifice 6.
[0068] The snap type opening of valve 3 is achieved, at least in
part, by the torque exerted on valve head 5 by connector sleeve 7,
which as noted in the example illustrated in FIG. 12, is sufficient
to substantially distort the shape of the marginal edge 42 of valve
head 5. When valve 3 assumes the fully extended and fully open
position illustrated in FIGS. 13 and 14, valve flaps 57, as well as
the associated rim portion 61 of valve head 5 are bent or
elastically deformed outwardly, thereby permitting the rim 65 of
valve head 5 to become smaller or constrict slightly. Valve flaps
57 tend to fold openly along lines extending between the ends 55a
and 55b or orifice slits 55 and 56. The continued radial inwardly
compression applied to valve head 5 by connector sleeve 7, in
addition to the outwardly oriented torque applied thereto by
connector sleeve 7, combine to keep discharge orifice 6 in the
fully open position, even if the pressure communicated with the
interior of container 2 is reduced. Hence, after discharge orifice
6 has been opened through the application of the predetermined
opening pressure, that pressure which is required to maintain fluid
flow through orifice 6 is reduced, or less than the threshold
pressure, so as to provide greater dispensing ease and flow
control. Since the resiliency of connector sleeve 7 serves to
resist the dilating action of valve head 5, and thereby compresses
the same to achieve a snap open/snap close motion, if the
resiliency of connector sleeve 7 is varied somewhat, such as by
making connector sleeve 7 thicker or thinner, the amount or degree
of snap action can be thereby adjusted for any specific
application. Similarly the resilient strength of ring 61 can be
adjusted to accomplish the desired snap action.
[0069] The combined compressive and torque forces acting on valve
head 5 by connector sleeve 7 open valve flaps 57 to a generally
predetermined configuration, such that the rate of flow through
discharge orifice 6 remains substantially constant, even though
significant pressure differences are applied to container 2. As
best illustrated in FIGS. 13 and 14, after valve 3 passes through
the bifurcation state shown in FIG. 12, in the direction of
opening, it quickly and positively assumes the fully open condition
shown in FIGS. 13 and 14, wherein the end edges 60 of valve flaps
57 diverge radially outwardly, such that discharge opening 6
assumes a star shaped plan configuration, as best seen in FIG. 14.
The marginal edge 42 of valve head 5 rotates or pivots inwardly
somewhat under the pressure of fluid product 18, and the resilient
torque applied thereto by connector sleeve 5, which continues to
resiliently urge valve 3 back toward its original molded shape
(FIG. 7). Connector sleeve 7 remains tensed both axially and
circumferentially under outwardly directed forces generated by the
pressures within container 2, as well as the dynamic flow of fluid
product through orifice 6. The geometry of the illustrated valve 3,
particularly in the shape of valve head 5 and connector sleeve 7,
serve to force valve 3 into the configuration shown in FIGS. 13 and
14 whenever orifice 6 is snapped opened.
[0070] When pressure within the interior of container 2 is reduced,
discharge orifice 6 will still remain open in substantially the
fully open position shown in FIGS. 13 and 14, until the pressure
reaches the preselected closure pressure, at which point, the
forces developed in connector sleeve 7 through elastic deformation
from its original molded shape (FIG. 7), pull valve head 5
inwardly, back through the bifurcation state, and into the concave
orientation shown in FIG. 10, thereby positively and securely
closing discharge orifice 6 with a snapping action, similar to that
action by which discharge orifice 6 opened. The snap closing motion
of valve head 5 serves to close orifice 6 very quickly and very
completely, so as to sharply cut off the stream of fluid product
being dispensed from package 1 without any drops or dribbles, even
when very viscous and/or dense products are being dispensed. Valve
3 will continue to assume the fully closed, fully extended position
illustrated in FIG. 10, until such time as the interior pressure in
container 6 is further reduced, so as to permit the resiliency in
connector sleeve 7 to shift valve head 5 back into the fully
retracted, initial position illustrated in FIG. 7.
[0071] At least some of those valves 3 contemplated by the present
invention have a relatively high predetermined closing pressure,
such as in the nature of 17-18 inches of water, so that orifice 6
will snap securely closed even if container 2 does not provide any
suck back, or negative pressure. Furthermore, the connector sleeve
7 of at least some such valves 3 is constructed to provide
sufficient resiliency to automatically shift valve head 5 back to
the fully retracted position (FIG. 7) without any suck back or
negative pressure from container 2. Hence, valves 3 can be readily
adapted for use in conjunction with containers which include
collapsing bags, tubes or the like. Also, valves 3 are particularly
adapted for bottom dispensing packages, such as those illustrated
in FIGS. 1-3, where valve 3 normally supports a column of liquid
product.
[0072] In many embodiments of dispensing package 1, container 2
will be designed with relatively stiff sidewalls 14 and 15 which
resume their original shape after being squeezed. In such
embodiments, the suck back of air into container 2 after dispensing
fluid product therefrom is typically desired to prevent collapsing
the container 2, and thereby facilitate continued ease of
dispensing until container 2 is completely empty. When valve 3 is
in the fully closed and fully retracted position (FIG. 9), the
concave configuration of valve head 5 permits orifice 6 to readily
open inwardly so that air can be sucked back into the interior of
container 2, yet positively prevents orifice 6 from opening
outwardly in a manner which would permit leakage. Hence, even
relatively weak, thin walled containers 2 can be used with valve 3
without significant collapsing of container sidewalls 14 and
15.
[0073] With reference to FIG. 15, dispensing package 1 may be
provided with a positive closure arrangement to prevent inadvertent
discharge when dispensing package 1 is being transported, or the
like, such as for initial shipping, travel, etc. The dispensing
package 1 shown in FIG. 15 includes a sliding closure 70, which
when closed, physically blocks the outward rolling extension of
connector sleeve 7 and associated valve head 5. By constraining the
outwardly extending motion of connector sleeve 7, valve head 5 is
prevented from inverting into a convex configuration, and thereby
keeps discharge orifice 6 fully closed. When closure 70 is slid
sideways out from underneath valve 3, valve 3 is then free to
reciprocate and open orifice 6 to dispense liquid product from
container 2.
[0074] FIG. 16 is a partially schematic view of an alternative
closure arrangement for dispensing package 1, wherein a removable
cap 71 is provided for detachable connection with retainer ring 23
by conventional fastener means, such as a snap lock, hinge, etc.
(not shown). The illustrated cap 71 has a generally flat exterior
surface 72, an interior surface 73, and a cylindrical sidewall 74,
which is sized and shaped such that interior cap surface 73 abuts
the rim 65 of valve 3 when valve head 5 is in its fully extended
position. The central portion of cap interior surface 73 includes
an inwardly projecting protuberance 75, which in the illustrated
example, is generally in the form of a convex, semi-spherical node
that extends inwardly toward valve 3 to a position adjacent to the
cupped exterior surface 38 of valve 3. Node 75 is shaped to
positively retain valve head 5 in a concave configuration, and
thereby securely maintain orifice 6 fully closed.
[0075] The reciprocating motion of valve head 5 on rolling
connector sleeve 7 provides dispensing package 1 with several
important advantages. For example, connector sleeve 7 is preferably
configured with sufficient flexibility that abnormal pressure
increases developed within the interior of container 2, such as
those caused by thermal expansion, or the like, are offset by the
axial shifting motion of valve head 5 with respect to connector
sleeve 7, so as to alleviate excess pressure on discharge orifice
6. In this manner, if dispensing package 1 were used in conjunction
with a liquid soap or shampoo that was designed for hanging in an
inverted condition in a shower or bath, when ambient temperatures
within the shower rise, instead of communicating the associated
pressure increases directly to discharge orifice 6 in a manner
which might cause it to inadvertently open, valve head 5 shifts
axially outwardly to relieve any such pressure, and thereby prevent
any inadvertent leakage of the fluid product from dispensing
package 1.
[0076] Another example of the benefits achieved by the rolling
diaphragm action of connector sleeve 7 and axial reciprocating
motion of valve head 5, is that connector sleeve 7 is preferably
configured with sufficient flexibility that any misalignment and/or
distortion of the valve flange 4, such as that experienced when
attaching the valve to container 2, are not transmitted to valve
head 5, thereby permitting unhindered operation of discharge
orifice 6. As previously noted, due to the inherently sticky nature
of liquid silicone rubber, the attachment of valves constructed
from the same to a container 2 can be quite difficult, and often
results in some type of unequal compression and/or distortion of
the marginal flange 4 of valve 3. Without the rolling diaphragm
action of connector sleeve 7, any such distortion is communicated
directly to the valve head 5, which in turn distorts discharge
orifice 6, and alters important design characteristics such as its
predetermined opening pressure, closing pressure, flow rate, etc.
The rolling diaphragm 5 connector sleeve 7 associated with the
present valve 3 tends to insulate or isolate valve head 5 from
marginal flange 7, such that it can float freely, and thereby avoid
such problems.
[0077] Yet another example of the benefits achieved by this aspect
of the present invention is that connector sleeve 7 is preferably
configured with sufficient flexibility that vibrations, shock
impact forces, and the like applied to container 2 are absorbed
and/or dampened by shifting valve head 5 on rolling connector
sleeve 7, so as to avoid inadvertent opening of discharge opening
6. In the event dispensing package 1 is dropped onto the floor,
slammed forcefully against a worksurface, or otherwise jarred or
shook, the shock forces arising from the acceleration and/or
deceleration of the fluid product within container 2 would
otherwise be communicated directly with the discharge orifice 6,
and tend to cause it to open inadvertently. However, the rolling
connector sleeve 7 action of valve 3 serves as a cushion or shock
absorber for such shock impact forces, and thereby greatly
alleviates the chance for the inadvertent discharge of fluid
product from dispensing package 1. In a similar manner, when
dispensing container 1 is used for non-homogenous fluids, such as
some types of salad dressings, or the like, which are typically
shook prior to use, connector sleeve 7 assists in absorbing these
vibrations, and thereby prevent leakage.
[0078] Yet another example of the benefits achieved by this aspect
of the present invention is that connector sleeve 7 is preferably
configured with sufficient flexibility that only very moderate
pressures, substantially lower than the predetermined opening
pressure of valve 3, are required to shift valve head 5 from the
fully retracted position (FIG. 7) to the fully extended position
(FIG. 10), thereby improving the dispensing "feel" of the package
1. When the user grasps container 2, even a very light squeeze on
sidewalls 14 and 15 will rollingly extend connector sleeve 7 and
valve head 5 to the fully extended and fully closed position shown
in FIG. 10, at which point valve head 5 halts momentarily and
further movement of the fluid product is resisted until additional
forces are exerted on container 2 which result in an internal
pressure within container 2 greater than the predetermined opening
pressure of valve 3. This motion of connector sleeve 7 and valve
head 5 is sensed by the user through touch or feel, typically in
the form of a vibration or ripple experienced in container
sidewalls 14 and 15 when valve head 5 reaches the fully extended
position (FIG. 10). This ripple motion signals the user that valve
head 5 is fully extended, and that further pressure will cause
valve 3 to snap open and dispense fluid product. When valve 3 snaps
open and snaps closed, similar vibrations or ripples are
communicated to the user through container sidewalls 14 and 15 to
assist in achieving accurate flow control.
[0079] In the illustrated examples of dispensing package 1, valve 3
is mounted within container 2 in a manner which causes valve head 5
to shift between the fully retracted position shown in FIG. 7
wherein valve 3 is disposed wholly within the interior of container
2 for safely storing valve 3, and the fully extended discharge
position shown in FIGS. 13 and 14 wherein valve head S and
associated orifice 6 are disposed wholly outside container 2 for
neatly dispensing the fluid product therethrough. By shifting valve
head 5 between these two extreme positions, valve 3 can remain
normally unexposed and secure within the container 2 when not in
use, without sacrificing neatness when dispensing. Also, valve 3 is
preferably positioned in container 2 so that the arcuate portion 51
of connector sleeve 7 is disposed adjacent the bottom 25 of
container base 13, so that if dispensing package is slammed down
onto a surface, abutment between valve 3 and the surface will
prevent valve 3 from shifting to the fully extended position, and
thereby keep orifice 6 closed to prevent inadvertent leakage.
[0080] Dispensing package 1 is extremely versatile, being capable
of easily and neatly dispensing a wide variety of fluid products.
The self-sealing valve 3 is matched with both the container 2 and
the type of liquid product 18 to be dispensed therefrom, so as to
quickly and securely seal, yet readily open upon manipulation by
the user, without requiring excess pressure or forces. The
resiliently flexible connector sleeve 7, which is configured to
double over and extend rollingly, accommodates for thermal
expansion within container 2, absorbs shock impact forces to the
container, accommodates for any misalignment and/or distortion
which might be applied to the valve flange in attaching the same to
the container, and provides a unique dispensing feel which greatly
facilitates accurate dispensing. Valve 3 is configured so that when
orifice 6 snaps open, a generally constant flow rate is established
therethrough, even when container 2 is subjected to a relatively
wide range of pressures. Valve 3 is also preferably configured such
that once discharge orifice 6 is open, the amount of pressure
required to maintain fluid flow is reduced, so as to provide
greater ease of operation and control, without sacrificing secure
sealing. Dispensing package 1 is particularly adapted for bottom
dispensing configurations, shake containers, and other similar
packaging concepts, without leakage.
[0081] The reference numeral 1a (FIGS. 20-23) generally designates
another dispensing package embodying the present invention, which
is particularly adapted for dispensing product from the top of the
associated container 2a. Since dispensing package 1a is similar to
the previously described dispensing package 1, similar parts
appearing in FIGS. 1-16 and FIGS. 17-23 respectively are
represented by the same, corresponding reference numeral, except
for the suffix "a" in the numerals of the latter.
[0082] The illustrated container 2a (FIG. 20) is particularly
designed for top dispensing, and includes a generally flexible,
oblong container body that may be integrally molded from an
appropriate synthetic resin material or the like, so as to create a
one-piece construction that includes oppositely oriented sidewalls
14a and 15a, a top 16a, and a bottom 17a. The container sidewalls
14a and 15a are laterally flexible to pressurize and depressurize
the interior of container 2a, and is preferably have sufficient
resiliency or stiffness that they automatically return to their
original shape upon release of any external forces which are
applied to container 2a to dispense a fluid product 18a
therefrom.
[0083] The illustrated container top 16a (FIGS. 20-21) includes a
neck 20a, which is normally in an upwardly opening orientation when
not dispensing, and defines a discharge opening 21a about which the
marginal portion 4a of dispensing valve 3a is positioned. The free
end of neck 20a includes an annularly shaped groove 22a having a
generally L-shaped longitudinal, cross-sectional configuration,
which is shaped to closely receive the marginal portion 4a of valve
3a therein. A valve retainer ring 23a is positioned adjacent groove
22a, and is attached to the neck 20a of container 2a by a snap lock
arrangement. Container base 17a has a substantially flat, annularly
shaped outer bottom 25a adapted to abuttingly support dispensing
package 1a upright on an associated surface, such as a countertop,
sink, worksurface, or the like. In the dispensing package 1a shown
in FIGS. 20-23, dispensing valve 3a is positioned in a generally
extended condition within dispensing package 2a, as opposed to the
generally recessed condition of valve 3 in dispensing package 1
(FIGS. 1-17), as described hereinabove.
[0084] With reference to FIGS. 17-19, the illustrated dispensing
valve 3a is generally similar to previously described dispensing
valve 3, and comprising a marginal portion 4a, a head portion 5a
with a discharge orifice 6a therein, and a connector sleeve 7a,
having one end connected with marginal portion 4a, and the opposite
end connected with head portion 5a. Connector sleeve 7a has a
resiliently flexible construction, such that when pressure within
container 2a is raised above a predetermined amount, the head
portion 5a of valve 3a shifts outwardly as shown in FIGS. 22 and
23, so as to dispense fluid product 18a therefrom. In contrast to
the previously described dispensing valve 1 (FIGS. 1-17), the
connector sleeve 7a of dispensing valve 3a does not double over and
extend rollingly, but simply shifts outwardly to apply opening
forces to valve head 5a in a manner which causes orifice 6a to snap
open, as described in greater detailed hereinafter.
[0085] The flange or marginal portion 4a (FIGS. 17-19) of the
illustrated dispensing valve 3a has an annular shape, with a
substantially triangular cross-sectional configuration, comprising
an upper edge 30a, an outer edge 31a, and a bottom edge 32a. The
marginal portion 4a of valve 3a has a thickness between top and
bottom edges 30a and 32a which is resiliently compressed upon
attachment of retainer ring 23a to form a secure leak resistant
seal therebetween.
[0086] The head portion 5a (FIGS. 17-19) of the illustrated
dispensing valve 3a has a circular plan shape, and a generally
tapered construction which is thicker at the radial outside portion
of valve head 5a, and thinner at the radial inside portion thereof.
This tapered construction assists in achieving the snap open/snap
close action of valve 3a, as described below. More specifically, in
the illustrated example, valve head 5a has an exterior side or
surface 38a, which has an arcuately shaped side elevational
configuration that opens outwardly, toward ambient environment, and
is defined by a first predetermined radius. Valve head exterior
surface 38 extends continuously between the exterior sidewalls of
connector sleeve 7a. Valve head 5a also includes an interior side
or surface 39a, which has a marginal portion 40a with an arcuately
shaped side elevational configuration which curves inwardly, toward
the interior of dispensing package 1a, and is defined by a second
predetermined radius. The radius of marginal portion 40a on
interior surface 39a is larger than that of exterior surface 38a,
such that the two surfaces converge toward the center of valve head
5a at or adjoining orifice 6a, and provide the above-noted inwardly
tapered construction of valve head 5a. The interior surface 39a of
valve head 5a also includes a center portion 41a, which has a
circular plan shape, with a substantially planar or flat side
elevational configuration, oriented generally perpendicularly to
discharge orifice 6a. The center portion 41a of valve head 5a
assists in improving the opening and closing characteristics of
valve 3a, as set forth below. Valve head 5a has a circular marginal
edge 42a, which begins at the outer edge 43a of marginal portion
40a, and extends outwardly therefrom with a slight taper,
ultimately merging into connector sleeve 7a. Marginal edge 42a of
valve head 5a is spaced radially inwardly of the adjacent upper
portion of connector sleeve 7a. The inner section of marginal
portion 40a and center portion 41a of head portion 5a define a
circular edge 44a.
[0087] The connector sleeve portion 7a of the illustrated
dispensing valve 3a has a generally J-shaped longitudinal
cross-sectional shape, comprising an annular base portion in the
form of a first leg portion 46a, and a radially inwardly
cylindrical sidewall portion in the form of a second leg portion
45a. Connector sleeve 7a has interior and exterior surfaces 47a and
48a respectively, which are spaced equidistantly apart along the
length thereof, such that connector sleeve 7a has a substantially
uniform thickness. One end 49a of connector sleeve 7a is connected
with the head portion 5a of valve 3a, and the opposite end 50a of
connector sleeve 7a is connected with the marginal portion 4a of
valve 3a. The first and second leg portions 46a and 45a of
connector sleeve 7a are mutually oriented at an acute included
angle, as measured between the exterior surfaces of connector
sleeve legs 46a and 45a, and noted by the Greek letter theta
(.theta.) in FIG. 19. The connector sleeve leg portions 46a and 45a
join one another at an arcuate portion 51a, which facilitates
movement of the head portion 5a of valve 3a when dispensing product
from the container 2a.
[0088] In the example illustrated in FIGS. 17-19, the first leg
portion 46a of connector sleeve 7a is shorter than the second leg
portion 45a, and the included angle between them is in the range of
65-85 degrees. Also, the first leg portion 46a of connector sleeve
7a is oriented at an acute angle relative to the axial centerline
of the head portion 5a, which extends through slit 56a. The outer
edge 42a of valve 3a is generally flat, and oriented substantially
parallel with the axial centerline of head portion 5a. The second
leg portion 45a of connector sleeve 7a is oriented at an acute
angle to the axial centerline of head portion 5a, at an angle in
the range of 2-10 degrees.
[0089] The connector sleeve 7a of the illustrated dispensing valve
3a has an inverted J-shaped end portion 49a at the top of leg
portion 46a, which extends arcuately into the head portion 5a of
valve 3a to further facilitate movement of the head portion 5a when
dispensing product from the container 3a. As previously noted, the
outer edge 42a of valve head 5a is spaced apart from the inside
surface of the upper end of connector leg 45a. This spacing between
valve head 5a and connector sleeve 7a assists in applying torque to
valve head 5a when dispensing product from the associated container
in the manner described in detail thereinafter. The inverted
J-shaped end portion 49a of connector sleeve leg portion 45a loops
around approximately 180 degrees to attach to valve head portion 5a
adjacent the outer margin of exterior surface 38a.
[0090] In operation, dispensing package 1a functions in the
following manner. Valve 3a normally assumes the outwardly
protruding orientation illustrated in FIG. 20, wherein valve 3a
remains substantially in its original molded shaped without
deformation, with a major portion of connector sleeve 7a as well as
head portion 5a protruding outwardly from snap ring 23a. When valve
3a is mounted in the top of container 2a, as shown in the
illustrated top dispensing package 1a, valve 3a is not normally
subjected to the hydraulic head pressure applied thereto by the
fluid product 18a.
[0091] To dispense product 18a from package 1a, the user first
inverts container 2a to the upside down orientation illustrated in
FIGS. 21-23. Preferably, discharge orifice 6a is positioned
directly over or aligned with the location at which the fluid
product 18a is to be dispensed. Additional pressure is then
communicated with the interior of container 2a, such as by manually
flexing container sidewalls 14a and 15a inwardly. Connector sleeve
7a permits the head portion 5a of valve 3a to begin shifting
axially outwardly toward the exterior of dispensing package 1a, as
illustrated in FIG. 22. The J-shaped configuration of connector
sleeve 7a assists in permitting the axial shifting of valve head
portion 5a. The elastic deformation of connector sleeve 7a from its
original molded shape generates a complex pattern of stresses
within valve 3a which resiliently urges the same back into its
original or normal configuration, which forces include an outwardly
directed torque applied by connector sleeve 7a to head portion 5a,
which tends to resiliently urge discharge opening 6 toward its open
position.
[0092] When additional pressure is communicated with the interior
of container 2a, the head portion 5a of valve 3a continues to shift
outwardly by further longitudinal stretching of connector sleeve
7a, and further enlargement of the plan shape of valve head 5a to
snap open to the fully open position illustrated in FIG. 23 in a
manner similar to that described in detail hereinabove with respect
to dispensing valve 1. Since the upper end of the second leg
portion 45a is attached to head portion 5a adjacent its outer
surface 38, a torque is applied to head portion 5a as the same
shifts axially outwardly which tends to snap orifice 6a open. The
inverted J-shaped portion 49a of second leg portion 45a assists in
effectively applying these opening forces to valve head portion
5a.
[0093] The reference numerals 3b (FIG. 24), 3c (FIG. 25), 3d (FIG.
26), 3e (FIG. 27) and 3f (FIGS. 28-29) generally designate
additional alternate embodiments of the present invention, that
have slightly different dispensing valve configurations. Since
dispensing valves 3b-3f are similar to the previously described
dispensing valves 3 and 3a, similar parts appearing in FIGS. 1-23
and 24-29 respectively are represented by the same, corresponding
reference numeral, except for the suffixes "b"-"f" respectively in
the reference numerals of the later.
[0094] Dispensing valves 3b-3f are each specifically designed for
top dispense containers, similar to the previously described
dispensing valve 3a, and operate in a similar manner. More
specifically, dispensing valve 3b is similar to dispensing valve
3a, except that the interior head portion surface 40b of dispensing
valve 3b is completely arcuate, and lacks the circular center
portion 41a of dispensing valve 3a. The radius of interior valve
head surface 40b is greater than that of the exterior valve head
surface 38b, such that valve head Sb has a tapered configuration,
which is thinner at discharge orifice 6b.
[0095] Dispensing valve 3c is similar to dispensing valve 3b,
except that the opposite surfaces 40c and 38c of valve head 5c are
parallel, and of the same radius, such that head portion 5c has a
substantially uniform thickness. Dispensing valve 3d is similar to
valve 3c, except that the upper end of connector sleeve 7d attaches
directly to the associated head portion 5d, without the inverted
J-shape 49c of valve 3c. Dispensing valve 3e is similar to valve
3a, except that the upper end of connector sleeve 7e attaches
directly to head portion 5e, without the inverted J-shape 49a of
valve 3a. Dispensing valve 3f is similar to valve 3a, except that
the interior surface 40f of head portion 5f has a square shape
adjacent orifice 6a, instead of the circular shape 44a of valve
3a.
[0096] The reference numerals 3g (FIG. 30), 3h (FIG. 31) and 3i
(FIG. 32) generally designate additional alternate dispensing
valves embodying the present invention. Since dispensing valves
3g-3i are similar to the previously described dispensing valves
3-3f, similar parts appearing in FIGS. 30-32 are represented by the
same, corresponding reference numeral, except for the suffixes
"g"-"i" respectively in the reference numerals of the later.
Dispensing valves 3g-3i are each specifically designed for bottom
dispense packaging, similar to valve 3, and operate in a similar
manner. More specifically, dispensing valve 3g is similar to
previously described valve 3, except that the opposite surfaces 38g
and 40g of valve head 5g are frustroconical, and taper to center
circular areas 80 and 81 adjacent discharge orifice 6g. Dispensing
valve 3h is similar to previously described dispensing valve 3g,
except that the opposite surfaces 38h and 40h of head portion 5h
intersect at discharge orifice 6h, such that they lack the circular
areas 80 and 81 of dispensing valve 3g. Dispensing valve 3i is
similar to previously described dispensing valve 3h, except that
the exterior surface 40i of head portion 5i is flat and oriented
generally perpendicular to the central axis of the valve 3i.
[0097] In the foregoing description, it will be readily appreciated
by those skilled in the art that modifications may be made to the
invention without departing from the concepts disclosed herein.
Such modifications are to be considered as included in the
following claims, unless these claims by their language expressly
state otherwise.
* * * * *