U.S. patent application number 15/606894 was filed with the patent office on 2018-11-29 for sheath to protect an aerosol valve stem.
The applicant listed for this patent is The Procter & Gamble Company. Invention is credited to Robert Paul CASSONI, Robert Earl MAGNESS, Kerry Lloyd WEAVER.
Application Number | 20180339841 15/606894 |
Document ID | / |
Family ID | 62599703 |
Filed Date | 2018-11-29 |
United States Patent
Application |
20180339841 |
Kind Code |
A1 |
MAGNESS; Robert Earl ; et
al. |
November 29, 2018 |
SHEATH TO PROTECT AN AEROSOL VALVE STEM
Abstract
An aerosol dispenser having a valve for dispensing product
through a valve stem. The valve stem is protected by a sheath, to
reduce breakage. The sheath extends equal to or above the height of
the valve stem, to absorb axially compressive loads and side impact
loads. The sheath can occur in the aerosol dispenser, an aerosol
container, an outer container, a preform and/or in the valve. The
aerosol dispenser can include bags, pistons and dip tubes.
Inventors: |
MAGNESS; Robert Earl;
(Mason, OH) ; CASSONI; Robert Paul; (Waynesville,
OH) ; WEAVER; Kerry Lloyd; (Florence, KY) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
The Procter & Gamble Company |
Cincinnati |
OH |
US |
|
|
Family ID: |
62599703 |
Appl. No.: |
15/606894 |
Filed: |
May 26, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65D 83/384 20130101;
B65D 83/44 20130101; B65D 83/62 20130101; B65D 83/38 20130101; B65D
83/32 20130101; B65D 83/205 20130101 |
International
Class: |
B65D 83/20 20060101
B65D083/20; B65D 83/38 20060101 B65D083/38 |
Claims
1. An aerosol container having a longitudinal axis and comprising:
a polymeric outer container comprising a closed end bottom and an
open neck longitudinally opposed thereto, said open neck having a
polymeric valve joined to said outer container in fluid tight
relationship, said polymeric valve having a polymeric valve stem
projecting upwardly to a valve stem distal end, a product delivery
device joined to at least one of said valve and said outer
container in fluid tight relationship, and a sheath extending
upwardly to a sheath distal end, said distal end of said sheath
being at or above said valve stem distal end.
2. An aerosol container according to claim 1 wherein said sheath
circumscribes said polymeric valve stem.
3. An aerosol container according to claim 1 wherein said sheath
projects upwardly from a sheath proximal end joined to said
polymeric valve.
4. An aerosol container according to claim 1 wherein said sheath
projects upwardly from a sheath proximal end joined to said
polymeric valve, said sheath being integral with said polymeric
valve.
5. An aerosol container according to claim 1 wherein said sheath
projects upwardly from a sheath proximal end joined to said
polymeric outer container.
6. An aerosol container according to claim 1 wherein said sheath
projects upwardly from a sheath proximal end joined to said
polymeric outer container said sheath being integral with said
polymeric outer container, and further comprising propellant within
said polymeric outer container.
7. (canceled)
8. An aerosol container according to claim 1, wherein said sheath
comprises at least one discrete, upstanding strut, spaced radially
from said polymeric valve stem.
9. An aerosol container according to claim 1, wherein said sheath
comprises at least three discrete, equally circumferentially spaced
upstanding struts, each said strut being parallel said longitudinal
axis.
10. (canceled)
11. An aerosol container according to claim 1, wherein said sheath
circumscribes said polymeric valve stem, said sheath having an
inner periphery and an outer periphery opposed thereto, said sheath
further comprising a plurality of longitudinally oriented blades
joined to one of said inner periphery and said outer periphery and
extending radially therefrom.
12. An aerosol container according to claim 1, wherein said sheath
circumscribes said polymeric valve stem, said sheath having an
inner periphery and an outer periphery opposed thereto, said sheath
further comprising a plurality of longitudinally oriented blades
integral with and extending radially inwardly from said inner
periphery.
13. An aerosol container according to claim 1, wherein said sheath
circumscribes said polymeric valve stem, said sheath having an
inner periphery and an outer periphery opposed thereto, said sheath
further comprising a plurality of longitudinally oriented blades
joined to one of said inner periphery and said outer periphery and
extending radially therefrom, wherein said sheath comprises
PET.
14. An aerosol container according to claim 1, wherein said sheath
comprises at least four discrete, equally circumferentially spaced
upstanding struts, each said strut being parallel said longitudinal
axis, each strut having a face so that said strut can act as a
blade responsive to axial torque applied thereto.
15. A polymeric outer container for an aerosol container usable as
an aerosol dispenser, said polymeric outer container having a
longitudinal axis and comprising: a closed end bottom and an open
neck longitudinally opposed thereto, said neck having a neck
diameter, a sheath projecting longitudinally upward from said neck,
said sheath having a sheath diameter greater than said neck
diameter; a polymeric valve cup joined to said outer container in
fluid tight relationship, a polymeric valve disposed within said
polymeric valve cup, said polymeric valve having an upwardly
projecting valve stem, said valve stem being disposed
longitudinally at or below said sheath, a product delivery device
joined to at least one of said polymeric valve and said outer
container in fluid tight relationship, and propellant disposed
within said outer container.
16-20. (canceled)
Description
FIELD OF THE INVENTION
[0001] The present invention relates to aerosol dispensers having a
sheath-protected valve stem and components for the manufacture
thereof.
BACKGROUND OF THE INVENTION
[0002] Aerosol dispensers are well known in the art. Aerosol
dispensers typically comprise an outer container which acts as a
frame for the remaining components and as a pressure vessel for
propellant and product contained therein. Outer containers made of
metal are well known in the art. However, metal containers can be
undesirable due to high cost and limited recyclability. Attempts to
use plastic have occurred in the art. Relevant attempts in the art
to employ plastic in aerosol dispensers are found in U.S. Pat. Nos.
2,863,699; 3,333,743; 4,969,577; 8,752,731; 9,296,550; 9,334,103
and 2009/0014679.
[0003] The outer containers are typically, but not necessarily,
cylindrical. The outer container may comprise a bottom for resting
on horizontal surfaces such as shelves, countertops, tables etc.
The bottom of the outer container may comprise a re-entrant portion
as shown in U.S. Pat. No. 3,403,804 or a base cup as shown in
commonly assigned U.S. Pat. No. 8,439,223 and U.S. Pat. No.
9,061,795. Sidewalls defining the shape of the outer container
extend upwardly from the bottom to an open top.
[0004] The open top defines a neck for receiving additional
components of the aerosol dispenser. The industry has generally
settled upon a nominal neck diameter of 2.54 cm, for
standardization of components among various manufacturers, although
smaller diameters, such as 20 mm, are also used. Various neck
shapes are shown in U.S. Pat. Nos. 6,019,252; 7,028,866; 7,279,207
and 7,303,087.
[0005] Typically a valve cup is inserted into the neck. The valve
cup is sealed against the neck to prevent the escape of the
propellant and loss of pressurization, such as described in U.S.
Pat. Nos. 8,074,847; 8,096,327; 8,844,765; 8,869,842 and 9,505,509.
The valve cup holds the valve components which are movable in
relationship to the balance of the aerosol dispenser. Suitable
valves are shown in commonly assigned U.S. Pat. No. 8,511,522 and
U.S. Pat. No. 9,132,955. When the valves are opened, product may be
dispensed through a nozzle, etc. as described in commonly assigned
U.S. Pat. No. 9,174,229.
[0006] A valve may be inserted into the valve cup for selective
actuation by the user. The valve is typically normally closed, and
may be opened to create a flow path for the product to ambient or a
target surface. The valve may be compatible with local recycling
standards. Suitable valves are disclosed in commonly assigned U.S.
Pat. No. 8,511,522 and U.S. Pat. No. 9,132,955.
[0007] If a valve is to be assembled into an aerosol, typically the
valve cup is crimped onto the neck of the aerosol container. But
this operation is expensive and is difficult to perform with a
plastic valve cup. A separate interlock may be used to attach a
valve to a valve cup, particularly a plastic valve 28 and plastic
valve cup are used. Suitable interlocks include bayonet fittings
and threads as disclosed in commonly assigned P&G Case 14458,
Ser. No. 15/235,237, filed Aug. 12, 2016. A pressure vessel with a
threaded bore is proposed in U.S. Pat. No. 8,505,762.
[0008] A bag may be used to contain product for selective
dispensing by a user. Dispensing of product from the bag occurs in
response to the user actuating the valve. The bag separates product
within the bag from propellant disposed between the bag and
container. This bag limits or even prevents intermixing of the
contents of the bag and the components outside of the bag. Thus,
product may be contained in the bag. Propellant may be disposed
between the outside of the bag and the inside of the outer
container. Upon actuation of the valve, a flow path out of the bag
is created. This embodiment is commonly called a bag in can and may
be used, for example, in dispensing shaving cream gels.
Alternatively, a bag may be directly joined to the valve housing,
in a configuration commonly called a bag on valve. A suitable bag
configuration is disclosed in commonly assigned P&G Case 14458,
Ser. No. 15/235,227, filed Aug. 12, 2016 which teaches attaching a
bag to a valve cup.
[0009] If a bag configuration is desired, propellant may be
disposed between the bag and outer container, as disclosed in U.S.
Pat. No. 5,219,005 and in commonly assigned U.S. Pat. No. 8,631,632
and U.S. Pat. No. 8,869,842. Afterwards, product fill may occur in
a separate, remote, operation, optionally carried out in another
location, which may be in the same country or in a different
country as disclosed in commonly assigned 2012/0291911. Such a
manufacturing process can conserve costs in production, shipment
and/or storage.
[0010] An aerosol container having a bag therein may be made from a
dual layer preform, having plural layers disposed one inside the
other. Relevant attempts include U.S. Pat. Nos. 3,450,254;
4,330,066; 6,254,820; RE 30093 E; WO 9108099 and US 2011/0248035
A1. But each of these attempts requires a separate operation to
attach the bag to the relevant component. Each attachment step
takes time in manufacturing and creates the opportunity for leakage
if not correctly performed. Improvements in dual layer preforms are
found in commonly assigned P&G Case 14461, application Ser. No.
15/235,279, filed Aug. 12, 2016.
[0011] Alternatively, a dip tube may be used if intermixing of the
product and propellant is desired. When the user actuates the
valve, the product and propellant are dispensed together through
the dip tube. This embodiment may utilize a dip tube. The dip tube
takes the product and propellant mixture from the bottom of the
outer container. Or a piston may be used to expel product,
particularly if highly viscous, as described in 2002/0027146, U.S.
Pat. No. 6,375,045 and commonly assigned 2016/0368700.
[0012] Collectively, bags, dip tube, pistons and the associated
hardware are referred to as product delivery devices. Various
formats for the delivery devices may be required for different
products, often complicating production. For example, one product
may require a dip tube product delivery device in conjunction with
a very small nozzle. The next aerosol dispenser on the production
schedule may simply require changeout to a new, larger, nozzle.
[0013] But if one wishes to then manufacture an aerosol dispenser
utilizing a bag for a particular production cycle, then manufacture
an aerosol dispenser having a dip tube, for subsequent production
cycles, considerable changeout is required. Different outer
containers are typically needed to accommodate the different
product delivery devices. Likewise, different valves are likely
required. As different valves are required, the different outer
containers must be matched to accommodate the different valves.
Different valves may also require different valve cups which can be
plastic and welded into place, be metal and crimped into place or
no valve cup at all may be needed. A combination of outer
container, valve, product delivery device and associated hardware,
if any, is referred to as a format for a particular aerosol
dispenser.
[0014] But each valve has a valve stem projecting upwardly from the
valve body. The valve stem is part of the flow path to ambient and
may connect to an actuator used to dispense product from the
aerosol dispenser upon demand The valve stem is preferably plastic
and prone to breakage during transport and handling, as for
example, occurs during shipping in ordinary bins from the site of
valve manufacture to valve assembly. The valve stem is further
prone to breakage post-assembly, during common soldier stacking of
the aerosol containers. If the valve stem breaks, it and the
related component parts are subject to scrap, causing downtime and
waste. Accordingly this invention, is directed to the problem of
mitigating valve stem breakage during aerosol dispenser
manufacturing.
SUMMARY OF THE INVENTION
[0015] In one embodiment the invention comprises an aerosol
dispenser, in another embodiment an aerosol container for an
aerosol dispenser, in another embodiment an outer container for an
aerosol dispenser, in another embodiment a valve for an aerosol
dispenser, in another embodiment a preform for an aerosol
dispenser. All of the embodiments have an upwardly projecting
sheath. The sheath extends to or beyond a valve stem, protecting
the valve stem. The sheath may or may not circumscribe the valve
stem.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings are to scale, unless otherwise noted as
schematic.
[0017] FIG. 1 is a vertical sectional view of an aerosol dispenser
according to the prior art and having an exposed valve stem.
[0018] FIG. 2 is a side elevational view of an aerosol dispenser
according to the present invention, showing the sheath being shown
partially in cutaway, an actuator and spray being schematically
dispensed from a nozzle, the actuator and nozzle being omitted from
all subsequent figures.
[0019] FIG. 3 is a vertical sectional view taken along lines 3 - 3
of FIG. 2, showing an aerosol container and having the actuator
removed for clarity.
[0020] FIG. 4A is a top plan view of a preform suitable for use
with the present invention and having a valve thereon.
[0021] FIG. 4B is a side elevational view of the valve and preform
of FIG. 4A.
[0022] FIG. 4C is a bottom plan view of the valve and preform of
FIG. 4A.
[0023] FIG. 5 is a fragmentary vertical sectional view of an
alternative embodiment of a valve and preform, showing the moving
assembly in the closed position and the valve having an annular
projection which intercepts the inside edge of a sealing surface in
the preform and schematically showing the preform as an outer
container in phantom.
[0024] FIG. 6A1 is a fragmentary vertical sectional view of a
preform, having a bag for the product delivery device and having an
upstanding annular projection on the bag and downwardly extending
projection on the valve, the moving assembly and valve stem of the
valve being removed for clarity, and schematically showing external
blades on the valve.
[0025] FIG. 6A2 is a fragmentary vertical sectional view of a
preform, having a bag for the product delivery device and having a
downwardly extending annular projections on the valve intercepting
the bag and outer container the moving assembly and valve stem of
the valve being removed for clarity, and schematically showing
external blades on the valve.
[0026] FIG. 6B1 is a fragmentary vertical sectional view of an
aerosol container, having a bag for the product delivery device,
showing the elevated valve stem prior to welding and having
internal blades on valve and schematic external blades on the outer
container.
[0027] FIG. 6B2 fragmentary vertical sectional view of the aerosol
container of FIG. 6B1, showing the valve stem coincident the
elevation of the sheath post-welding.
[0028] FIG. 7A1 is a vertical sectional view of the preform and
valve of FIG. 6A having a bag for the product delivery device
welded to the preform and showing the valve in the closed
position.
[0029] FIG. 7A2 is an enlarged fragmentary view of the valve and
preform of FIG. 7A1.
[0030] FIG. 7B1 is a vertical sectional view of the preform and
valve of FIG. 7A1 prior to welding with the energy concentrators in
position, the bag energy concentrator depending lower than the
outer container energy concentrator and showing the valve in the
open position.
[0031] FIG. 7B2 is an enlarged fragmentary view of the valve and
preform of FIG. 7B1.
[0032] FIG. 7C1 is a vertical sectional view of an alternative
embodiment of the preform and valve of FIG. 6A having a dip tube
for the product delivery device with the energy concentrators in
position, the dip tube concentrator depending lower than the outer
container energy concentrator.
[0033] FIG. 7C2 is an enlarged fragmentary view of the valve and
preform of FIG. 7C1, showing the valve and dip tube welded into
position.
[0034] FIG. 8A is a top perspective view of a valve usable with the
present invention.
[0035] FIG. 8B is a side perspective view of the valve of FIG.
8A.
[0036] FIG. 8C is a bottom perspective view of the valve of FIG.
8A.
[0037] FIG. 9 is a schematic fragmentary sectional view of an
alternative embodiment of an aerosol container, having the valve
threadedly joined to the neck of the outer container and having the
sheath projecting upwards from the outer container.
[0038] FIG. 10 is a side elevational view of a preform shown
partially in cutaway and suitable for use with the aerosol
container of FIG. 9.
[0039] FIG. 11 is a schematic perspective view of an alternative
embodiment of a valve having discrete upstanding struts for the
sheath, the struts also functioning as blades, the valve stem
omitted for clarity.
[0040] FIG. 12 is a schematic side elevational view of an
alternative embodiment of a preform having discrete upstanding
struts for the sheath, the struts also functioning as blades.
DETAILED DESCRIPTION OF THE INVENTION
[0041] Referring to FIG. 1, an aerosol dispenser 20 according to
the prior art is shown. The aerosol container 22 has an exposed
valve stem 28S. The exposed valve step 28S projects above the neck
24 of the outer container 22.
[0042] Such a geometry exposes the valve stem 28S to breakage from
top loads, as occurs during soldier stacking and from side impact,
as occurs during routine handling.
[0043] Referring to FIGS. 2 and 3, an aerosol dispenser 20 and
aerosol container 22, each having a longitudinal axis is shown. The
aerosol dispenser 20 comprises a pressurizeable outer container 22
usable for such an aerosol dispenser 20. The outer container 22 has
a neck 24 into which a valve cup 26 is sealingly disposed. A valve
28 and actuator 29 may be disposed in the valve cup 26 for
selective dispensing of product 42 from the aerosol dispenser 20. A
seal 30 having a surface for sealing a valve 28 to the valve cup 26
may be disposed below the valve cup 26 and valve 28 to prevent
escape of product 42 to ambient. As used herein, an aerosol
container 20C may be a subset of an aerosol dispenser 20, and have
an outer container 22, valve cup 26 sealed thereto with a bag
55/dip tube 56, collectively referred to as a product delivery
device 55, 56, joined to the valve cup 26, and optionally
propellant 40, but not necessarily a valve 28, actuator 29,
labeling, etc. Optionally the valve 28 may be directly joined to
the outer container without a separate valve cup 26.
[0044] As used herein, the top of the aerosol dispenser 20 or the
outer container 22 is taken as the uppermost part, when the aerosol
dispenser 20 or container 22 is vertically oriented in its normal
use or storage position. As used herein, the bottom of the aerosol
dispenser 20 or the outer container 22 is taken as the lowermost
part, when the aerosol dispenser 20 or the container 22 is
vertically oriented in its normal use or storage position. The top
and bottom are longitudinally opposed, with the top typically being
open at a neck 24 and bottom typically being a closed end. The
terms `above` and `below` refer to relative positions towards and
away from the top, respectively. Likewise the terms `above` and
`below` refer to relative positions away from and towards the
bottom, respectively.
[0045] The aerosol dispenser 20 and outer container 22 have a
longitudinal axis, defining the main axis. The aerosol dispenser 20
and outer container 22 may be longitudinally elongate, i.e. having
an aspect ratio of longitudinal dimension to transverse
dimension[s] such as diameter greater than 1, an aspect ratio equal
to 1 as in a sphere or shorter cylinder, or an aspect ratio less
than 1.
[0046] The outer container 22 may comprise metal or preferably
plastic, as are known in the art. The plastic may be polymeric, and
particularly comprise polyethylene terephthalate (PET) or
polypropylene (PP) for all of the components described herein. The
outer container 22 may be injection molded or further blow molded
in an ISBM process, as well known in the art. The outer container
22 defines a longitudinal axis and may have an opening at one end
thereof. The opening is typically at the top of the pressurizeable
container when the pressurizeable container is in its-in use
position.
[0047] The opening defines a neck 24, to which other components may
be sealingly joined. The neck 24 has a neck diameter, taken as the
inside diameter at the top of the outer container 22.
[0048] As the top of the outer container 22 is approached, the
outer container 22 may have a neck 24. The neck 24 may be connected
to the container sidewall by a shoulder 23. The shoulder 23 may
more particularly be joined to the sidewall by a radius. The
shoulder 23 may have an annular flat. The neck 24 may have a
greater thickness at the top of the outer container 22 than at
lower portions of the neck 24 to provide a differential thickness.
Such differential thickness may be accomplished through having an
internally stepped neck 24 thickness.
[0049] A normally closed valve 28 may be disposed in the neck 24.
The valve 28 is openable upon demand by a user, in response to
manual operation of an actuator 29. The actuator 29 may be
depressable, operable as a trigger, etc. to spray product 42 from
the aerosol dispenser 20. Illustrative and non-limiting products 42
include shave cream, shave foam, body sprays, body washes,
perfumes, cleansers, air treatments, astringents, foods, paint,
insecticides, etc.
[0050] An optional valve cup 26 may be sealed to the opening of the
outer container 22. The valve cup 26 may be sealed to the neck 24
of the outer container 22 using class 1 TPE material. Polyester
based TPE sold by Kraiburg TPE GmbH & Co KG of Waldkraiburg,
Germany under the name HTC8791-52 and sold by DuPont of Delaware
under the name HYTEL may be used for good resistance to Silicone
and adhesion to PET. Such a TPE material is believed to fall under
Resin Identification Code 1/01 for PETE/PET, as set forth above by
the Society of Plastics Industry and ASTM D7611. Or a Styrenic bloc
copolymer based TPE such as Kraiburg HTC8791-24 or Krayton
elastomer may be used, providing easier process and lower density.
Other seal materials include silicone, rubber and similar
conformable materials.
[0051] If desired, the valve cup 26 may be sealed to the outer
container 22 utilizing a press fit, interference fit, solvent
welding, laser welding, sonic welding, ultrasonic welding, spin
welding, adhesive or any combination thereof. An intermediate
component, such as a sleeve or connector may optionally be disposed
intermediate the valve cup 26 and neck 24 or top of the outer
container 22. Any such arrangement is suitable, so long as a seal
adequate to maintain the pressure results.
[0052] Referring to FIGS. 4A, 4B and 4C, a preform 60 can be made
in a single injection molding operation, providing tolerances
suitable for mass production. A first preform 60 is then blow
molded in known fashion to make the outer container 22. A valve
attachment 25, such as threads, is above the blow molding
operation, preventing undue dimensional distortion thereof. A
second preform 60 can be used to make the valve cup 26 as the
finish and internal bag 55 as the body upon blow molding thereof.
One of skill will understand the blow molding step may also include
stretching as is known in the art.
[0053] The invention further comprises a sheath 28P. The sheath 28P
protects the valve stem 28S, as described herein. If the valve stem
28S is broken, or its movement (usually in the axial direction)
hindered, scrap ensues. The sheath 28P has a sheath diameter, taken
as the internal diameter of the proximal end of the sheath 28P. The
sheath 28P has a sheath distal end, taken as the uppermost portion
of the sheath 28P without an actuator 29 or other attachment. The
distal end of the sheath 28P extends to a position at or above the
distal end of the valve stem 28S.
[0054] Furthermore, the sheath 28P may have internal or external
blades 28B. The blades 28B may assist in theadedly assembling the
valve 28 to the outer container 22, or in spin welding the valve 28
to the outer container 22. The blades 28B can intercept an external
drive, then transmit torque to the sheath 28P about the
longitudinal axis, causing responsive rotation of the sheath 28P as
desired. Particularly, each blade 28P may have a face to engage the
external drive.
[0055] Preferably a plurality of two or more blades 28P is used, to
distribute torsional loading. The sheath 28P has an inner periphery
and an outer periphery. The blades 28 may extend radially outwardly
from the outer periphery, providing the benefit of greater torque.
Alternatively, blades 28 may extend radially inwardly from the
inner periphery, providing the benefit of conserving space.
[0056] Optionally, the bag 55 can be integral with the valve cup
26. By integral it is meant that the bag 55 and valve cup 26 are
monolithic, molded at the same time or molded of two different
materials melted together in a permanent manner An integral bag 55
and valve cup 26 cannot be separated into two components without
tearing or undue deformation. A container 22 made from a preform 60
using ISBM is referred to herein as a molded container 22.
[0057] Referring to FIG. 5, a valve 28, in turn, may be disposed
within the valve cup 26. The valve 28 provides for retention of
product 42 within the aerosol dispenser 20 until the product 42 is
selectively dispensed by a user. The valve 28 may be selectively
actuated by an actuator 29. A nozzle 27 and related valve 28
components may optionally be included, depending upon the desired
dispensing and spray characteristics. The valve 28 may be attached
using conventional and known means. The valve 28 and actuator 29
may be conventional and do not form part of the claimed invention.
Selective actuation of the valve 28 allows the user to dispense a
desired quantity of the product 42 on demand
[0058] The valve 28 may provide for dispensing from the top of the
bag 55/dip tube 56 through one or more ports and into the valve
stem. Optionally, the valve 28 may have a bypass outside the ports
to accommodate relatively viscous product 42.
[0059] The valve 28 comprises a moving assembly 28M disposed within
a housing 28H. The housing 28H may be relatively rigid, while the
moving assembly 28M is resiliently returnable to a closed position
once dispensing is complete. The housing 28H has a lateral
component which serves for attachment to the preform 60/outer
container 22.
[0060] The valve 28 may be a normally closed valve 28. A normally
closed valve 28 is closed in its rest position. The valve 28 is
only opened when actuated upon demand by a user.
[0061] A valve stem 28S provides a product 42 flow path and joins
the actuator 29 to the valve 28 in fluid communication. The valve
stem 28S may be disposed within and cause responsive movement in
the moving assembly 28M. The valve stem 28S has a valve stem distal
end, taken as the uppermost portion of the valve stem 28S without
an actuator 29 or other attachment.
[0062] Referring to FIGS. 6A1 and 6A2, the housing 28H of valve 28
may have an upwardly projecting sheath 28P. The upstanding sheath
28P may circumscribe and extend longitudinally beyond the valve
stem 28S. By extend longitudinally beyond, it is meant that the
distal end of the sheath 28P is disposed above the distal end of
the valve stem 28S when the valve stem 28S is in the normally
closed position. The projections shown in FIGS. 6A1 and 6A2 may
assist in optional, welding, particularly spin welding, if used to
join various components.
[0063] The sheath 28P has optional external blades 28B to assist in
spin welding or other joining operations. It is to be understood
the optional external blades 28B may be disposed on the valve 28 as
shown or on the preform 60/neck 24. Likewise, the optional internal
blades 28B may be disposed on the valve 28 as shown or on the
preform 60/neck 24.
[0064] Referring to FIGS. 6B1 and 6B2, the assembly may have both
internal blades 28B and external blades 28B. This arrangement
provides the benefit that two coaxial external drives may be used.
The external drives may be used for counter-rotation, or one may
hold a set of blades 28B stationary while the other blades 28B
respond to torsionally applied rotational forces. FIG. 6B1 shows
the valve stem 28S projecting above the height of the sheath 28P
prior to welding a vertical distance `H`. FIG. 6B2 shows that, as a
result of the welding operation, the valve stem 28S has dropped to
an elevation coincident with and protected by the sheath 28P.
[0065] Referring back to FIGS. 1-2, the product delivery device 55,
56 may be used to contain and/or provide for delivery of product 42
from the aerosol dispenser 20 upon demand. Suitable product
delivery devices 55, 56 comprise pistons, bags 55, dip tubes 56,
and do not form part of the claimed invention, except as
specifically claimed herein. If desired, the product delivery
device 55, 56 may further comprise a metering device for dispensing
pre-determined, metered quantities of product 42, as described in
U.S. Pat. Nos. 2,815,889; 4,142,652 and 5,421,492. The product
delivery device 55, 56 may also comprise an inverting valve having
a ball therein to alter product 42 flowpath.
[0066] If desired the product delivery device 55, 56 may comprise a
dip tube 56 disposed in a bag 55. Such a dip tube 56 may reach to
nearly the bottom of the bag 55, or be juxtaposed near the middle
of the bag 55. A dip tube may be made according to U.S. Pat. No.
8,091,741.
[0067] The pressurizeable container may further include a
propellant 40. The propellant 40 may comprise hydrocarbons,
nitrogen, air and mixtures thereof. Propellant 40 listed in the US
Federal Register 49 CFR 1.73.115, Class 2, Division 2.2 are also
considered acceptable. The propellant 40 may particularly comprise
a Trans-1,3,3,3-tetrafluoroprop-1-ene, and optionally a CAS number
1645-83-6 gas. One such propellant 40 is commercially available
from Honeywell International of Morristown, New Jersey under the
trade name HFO-1234ze or SOLSTICE.
[0068] If desired, the propellant 40 may be condensable. Generally,
the highest pressure occurs after the aerosol dispenser 20 is
charged with product 42 but before the first dispensing of that
product 42 by the user. A condensable propellant 40, when
condensed, provides the benefit of a flatter depressurization curve
at the vapor pressure, as product 42 is depleted during usage. A
condensable propellant 40 also provides the benefit that a greater
volume of gas may be placed into the container at a given pressure.
A condensable propellant 40, such as HFO-1234ze, may be charged to
a gage pressure of 100-400 kPa at 21 degrees C.
[0069] If desired, the outer container 22, valve cup 26, valve 28,
and/or piston may be polymeric. By polymeric it is meant that the
component is formed of a material which is plastic, comprises
polymers, and/or particularly polyolefin, polyester or nylons, and
more particularly PET. Thus, the entire aerosol dispenser 20 or,
specific components thereof, may be free of metal, allowing
microwaving. Microwave heating of the aerosol dispenser 20 or
pressurizable container therefor provides for heating of the
product 42 prior to dispensing. Heating of the product 42 prior to
dispensing may be desirable if the product 42 is applied to the
skin, becomes more efficacious at lower viscosities, or is to be
eaten.
[0070] The valve cup 26 may have a valve cup 26 periphery
complementary to the neck 24 periphery. At least one of the valve
cup 26 and/or container neck 24 may have one or more channels
therethrough. Additionally or alternatively, the channels may be
formed at the interface between the valve cup 26 and container neck
24. The channels may be formed by irregularities, such as
crenulations, merlins, serrations, notches, teeth, etc. between
valve cup 26 and/or container neck 24.
[0071] The outer container 22, and all other components, optionally
excepting the TPE seal, may comprise, consist essentially of or
consist of PET, PEN, Nylon, EVOH or blends thereof to meet DOT SP
14223. All such materials may be selected from a single class of
recyclable materials, as set forth above by the Society of Plastics
Industry and ASTM D7611. Particularly all components of the aerosol
dispenser 20 may comprise the aforementioned TPE and PET/PETE,
Resin Identification Code 1/01. This material selection provides
the benefit that the entire aerosol dispenser may advantageously be
recycled in a single stream.
[0072] Alternatively, the valve cup 26 and/or bag 55 may comprise
plural layers such as nylon with EVOH, PET and/or polyolefin
materials. Three layers may be utilized, such as PET/Nylon/PET or
PET/EVOH/PET. The layers may be co-molded or overmolded. The
multi-layer arrangements may provide increased barrier resistance
and reduced failure rates.
[0073] The outer container 22, and/ optionally the product delivery
device 55, 56, may be transparent or substantially transparent.
This arrangement provides the benefit that the consumer knows when
product 42 is nearing depletion and allows improved communication
of product 42 attributes, such as color, viscosity, etc. Also,
labeling or other decoration of the container may be more apparent
if the background to which such decoration is applied is clear.
[0074] Suitable decoration includes labels 57. Labels 57 may be
shrink wrapped, printed, etc., as are known in the art.
[0075] The outer container 22 may define a longitudinal axis of the
aerosol dispenser 20. The outer container 22 may be axisymmetric as
shown, or, may be eccentric. While a round cross-section is shown,
the invention is not so limited. The cross-section may be square,
elliptical, irregular, etc. Furthermore, the cross section may be
generally constant as shown, or may be variable. If a variable
cross-section is selected, the outer container 22 may be barrel
shaped, hourglass shaped, or monotonically tapered.
[0076] The outer container 22 may range from 6 to 60 cm, and
particularly 10 to 40 cm in height, taken in the axial direction
and from 3 to 60 cm, and particularly 4 to 10 cm in diameter if a
round footprint is selected. The outer container 22 may have a
volume ranging from 40 to 1000 cc exclusive of any components
therein, such as a product delivery device 55, 56. The outer
container 22 may be injection stretch blow molded. If so, the
injection stretch blow molding process may provide an overall
stretch ratio of greater than 8, 8.5, 9, 9.5, 10, 12, 15 or 20 and
less than 50, 40 or 30.
[0077] The outer container 22 may sit on a base. The base is
disposed on the bottom of the outer container 22. Suitable bases
include petaloid bases, champagne bases, hemispherical or other
convex bases used in conjunction with a base cup. Or the outer
container 22 may have a generally flat base with an optional
punt.
[0078] A manifold may supply propellant 40, under pressure, through
at least one channel between the valve cup 26 and container neck
24. The manifold may be retractingly disposed above the container
22. The manifold may be brought into contact with the valve cup 26,
forming a temporary seal therebetween. Suitable channels are
particularly described in commonly assigned U.S. Pat. No. 8,869,842
to Smith at FIG. 8, column 7, lines 57 to column 8, line 2 and
column 8, lines 44-60. While the temporary seal is established
between the manifold and valve cup 26, the propellant 40 may be
charged into the outer container 22.
[0079] The aerosol dispenser 20, as presented to a user may have an
initial pressure. The initial pressure is the highest pressure
encountered for a particular filling operation, and corresponds to
no product 42 yet being dispensed from the product delivery device
55, 56. As product 42 is depleted, the outer container 22
approaches a final pressure. The final pressure corresponds to
depletion of substantially all product 42, except for small
residual, from the product delivery device 55, 56. One benefit of
the invention is that the residual product 42, remaining at end of
life, is unexpectedly minimized
[0080] This arrangement provides the benefit that propellant 40 may
be charged to a lesser pressure than the desired starting pressure,
decreasing propellant 40 charge time and reducing pressure applied
to the charging machinery. Another benefit is that propellant 40 is
disposed as needed for the end use when the aerosol dispenser 20 is
ready for sale, product 42 fill and upon product 42 depletion may
be recharged with product 42 and reused.
[0081] At 21 degrees C., the outer container 22 may be pressurized
to an internal gage pressure of 100 to 1300, 110 to 490 or 270 to
420 kPa. A particular aerosol dispenser 20 may have an initial
propellant 40 pressure of 1100 kPA and a final propellant 40
pressure of 120 kPa, an initial propellant 40 pressure of 900 kPA
and a final propellant 40 pressure of 300 kPa, an initial
propellant 40 pressure of 500 kPA and a final propellant 40
pressure of 0 kPa, and any values therebetween.
[0082] Referring to FIGS. 7A1, 7A2, 7B1, 7B2, 7C1 and 7C2, a
permanent seal between components of the aerosol dispenser 20 is
desired, the seal may be welded. Particularly, if the components
have compatible melt indices, such components may be sealed by
welding to retain propellant therein. Suitable welding processes
may include sonic, ultrasonic, spin, and laser welding. Welding may
be accomplished with a commercially available welder, such as
available from Branson Ultrasonics Corp. of Danbury, Conn.
Alternatively or additionally, the channel may prophetically be
blocked by a plug or sealed by adhesive bonding. Suitable sealing
processes for the channel are particularly described in commonly
assigned U.S. Pat. No. 8,869,842 to Smith at FIG. 9 and column 8,
lines 30-43.
[0083] Spin welding has been found to be particularly preferred.
Spin welding provides the benefit that the energy plane is
generally confined to a small vertical space, limiting unintended
damage of other components not intended to be welded or receive
such energy. Spin welding further provides the benefit that both
the outer container weld 22W and the weld 55W for the bag 55/the
weld 56W for the dip tube 56 may occur simultaneously or nearly at
the same time, increasing product speed.
[0084] Or if desired, the product delivery device weld 55W, 56W may
occur first, providing a pressure boundary between the product
delivery device 55, 56 and the valve 28. During establishment of or
once the pressure boundary has been established, the propellant 40
charge may occur, allowing for simultaneous welding and charging.
After the product delivery device weld 55W, 56W and propellant 40
charge occur the outer container weld 22W may be completed,
providing for containment of the propellant 40 within the outer
container 22.
[0085] The timing of the product delivery device weld 55W, 56W
occurring after, or preferably before the outer container weld 22W
may be influenced by respective projections 22E, 55E, 56E.
Particularly the valve 28 may have a depending product delivery
device projection 55E, 56E, circumscribing an outer container
projection 22E. The if the projections equally contact the
respective mating surfaces, the product delivery device weld 55W,
56W, and outer container weld 22W will generally simultaneously
occur. Preferably, the product delivery device projection 55E for
the bag 55/56E for the dip tube 56 depends further than the outer
container projection 22E, so that welding order allows for
propellant charge 40 as described herein.
[0086] If the product delivery device 55, 56 is a dip tube 56, the
propellant 40 charge and product 42 charge may simultaneously
occur. The propellant 40 and product 42 may be premixed into a
single charge, which occurs during the welding operation.
Alternatively either a bag 55 or a dip tube 56 aerosol dispenser 20
may have the product 42 later added through the valve 28, as is
known in the art.
[0087] The valve 28 is welded to the outer container 22 in fluid
tight relationship by an outer container weld 22W. The outer
container weld 22W occurs between the valve 28 and the first
annular sealing surface. Likewise, a product delivery device 55, 56
is welded to the valve 28 or the outer container 22 in fluid tight
relationship by a product delivery device weld 55W, 56W. The
product delivery device 55, 56 weld occurs between the product
delivery device 55, 56 and the second annular sealing surface. The
product delivery device weld 55W, 56W is radially spaced apart from
the outer container weld 22W.
[0088] If desired, the valve 28 may be welded to the second sealing
surface directly or may be welded to the product delivery 55, 56.
This assembly geometry provides the flexibility for various
geometries depending upon the specific aerosol dispenser and
product 42 combination desired.
[0089] The outer container 20C according to the present invention
has two welds a product delivery device weld 55W, 56W and an outer
container weld 22W, which are mutually radially spaced apart from
the other. If one or more of the product delivery device weld 55W,
56W and outer container weld 22W are relatively thick in the radial
dimension, and spaced relatively close to the other, the product
delivery device weld 55W, 56W and outer container weld 22W may
appear to merge. Such an embodiment is contemplated and within the
scope of the present invention. While two radially spaced apart
welds 55W, 56W, 22W are shown, one of skill will recognize that any
plurality of welds may be utilized. Additional welds may be used to
join additional components as desired or to reinforce the product
delivery device weld 55W, 56W and outer container weld 22W.
[0090] The outer container weld 22W may circumscribe the product
delivery device weld 55, 56W in concentric or eccentric fashion.
The outer container weld 22W and product delivery device weld 55,
56W may be of equal or unequal radial thickness, require equal or
unequal energy to effect a proper bond and may be equally or
unequally spaced from the other and equally or unequally spaced
about the longitudinal axis.
[0091] If desired, the outer container 22 and propellant 40 may be
assembled at a first location. The product 42, decoration, etc. may
be added at a second location, as described in commonly assigned
2012/0292338 and 2012/0291911.
[0092] Thus, the aerosol dispenser 20 may be made by providing
nested preforms 60 comprising an outer preform 60 and inner preform
60 disposed therein. The inner preform 60 has a valve cup 26 at the
open end thereof.
[0093] The preforms 60 are blowmolded together to form an outer
container 22 and having an open end and an inner bag 55 depending
therefrom towards the closed end of the outer container. Propellant
40 is charged between the bag 55 and outer container 22. The valve
cup 26 is sealing joined to the open end of the outer container 22
to contain the propellant 40 therein and form an aerosol container
20C. The aerosol container 20C may then be stored as needed or
directly shipped for product 42 fill, installing the valve 28,
actuator 29, label, etc.
[0094] Alternatively, an integral inner bag 55/valve cup 26
combination may be provided and inserted into an outer container
22. The inner bag 55 is inserted in the open end of the outer
container 22. Propellant 40 is charged between the bag 55 and outer
container 22. The integral valve cup 26 is sealingly joined to the
open end of the outer container 22 to contain the propellant 40
therein and form an aerosol container 20C. The aerosol container
20C may then be stored as needed or directly shipped for product 42
fill, installing the valve 28, actuator 29, label, etc. In either
alternative, the inner preform 60 may have a neck 24 according to
the present invention, with the first annular sealing surface 31
and second annular sealing surface 32 as described and claimed
herein.
[0095] While a round outer container 22 is described, the invention
is not so limited. The outer container 22, and thus the valve
attachment, first annular sealing surface 31 and second annular
sealing surface 32 may be of any desired shape so long as the
circumference of the second annular sealing surface 32 is less than
and interior to the circumference of the first annular sealing
surface 31 which in turn is less than and interior to the
circumference of the valve attachment circumference. Preferably the
valve attachment circumference, first annular sealing surface 31
circumference and second annular sealing surface 32 circumference
are concentric.
[0096] Referring to FIGS. 8A, 8B and 8C, the valve 28 may be
injection molded as a housing 28H, having a longitudinally
projecting sheath 28P and radially extending valve cup 26. The
optional blades 28B may be integrally molded with the sheath 28P or
later added. The optional blades 28B may be internal to the sheath
28P, external to the sheath 28P or any combination thereof. The
moving assembly 28M and valve stem 28S may be later added as
separate components.
[0097] Referring to FIGS. 9-10, alternatively or additionally, the
sheath 28P may be cantilevered from the top of the outer container
22. In such an embodiment, the sheath 28P may be joined to the
outer container 22 after blow molding. Alternatively, and
preferably, the sheath 28P may be integrally molded with the
preform 60. This arrangement eliminates an assembly step and the
possibly detachment. Either such embodiment, having a
circumscription sheath 28P has the benefit of increasing rigidity
of the respective component and protecting the valve stem from side
impact throughout all 360 degrees.
[0098] An optional seal 30 may be used, to improve the pressure
boundary below or at the threads 25. The seal 30 may separate the
first sealing surface 31 and second sealing surface 32.
[0099] Referring to FIGS. 11-12, alternatively the upstanding
sheath 28P may comprise at least one, and preferably three or more
circumferentially spaced, upstanding struts 28P. The struts 28P may
be cantilevered from the valve housing 28H. Each strut 28P
longitudinally extends beyond the valve stem 28S. If discretely
spaced struts 28P are selected, preferably such struts 28P are
equally circumferentially spaced and further equally radially
spaced about the longitudinal axis to more uniformly distribute
compressive loads.
[0100] The struts 28P may be parallel to the longitudinal axis,
oriented radially inwardly or radially outwardly as desired. This
arrangement provides the benefit that the struts 28P can serve the
dual functionalities of protecting the valve stem 28S and serving
as optional blades 28B for applying rotational motion, while
conserving material over a circumscription sheath 28P.
[0101] The sheath 28P may be directly joined to the valve 28 or may
be indirectly joined to the valve 28. For example, the sheath 28P
may be joined to and upstanding from a product delivery device 55,
56, which, in turn, is joined to the valve 28. All such embodiments
are contemplated within the scope of the claimed invention and are
considered to incorporate a sheath 28P joined to a valve 28.
[0102] Struts 28P and a circumscription sheath 28P which are
concentric to the longitudinal axis and of constant geometry are
shown. The invention is not so limited. The sheath 28P may be
eccentric, of variable thickness, variable height, crenulated,
fully or partially circumscribe the valve stem 28S, etc., so long
as the valve stem 28S is protected. Likewise, the valve stem 28S
may be concentrically located, as shown, or be eccentric to the
longitudinal axis, and/or may be parallel to or skewed relative to
the longitudinal axis. A single valve stem 28S may be used or
plural valve stems 28S may be used.
[0103] Either geometry protects the valve stem 28S during storage
and assembly. For example, if the aerosol containers 20C are
soldier stacked prior to product 42 fill and adding the actuator
29, the sheath 28P protects the valve stem 28S from compressive
loads due to the layers stacked above.
[0104] The invention comprises various embodiments and
combinations, as set forth below in exemplary, non-limiting manner
It is to be understood that any of the variations, and combinations
listed in each of the embodiments for the outer container 22,
aerosol container 20C aerosol dispenser 20 and/or preform 60 may be
used for any other such embodiment without limitation.
[0105] Each combination and variation described herein for an
execution as a preform, valve, outer container, aerosol container
or an aerosol dispenser is suitable for and can be deployed in any
other execution. [0106] A. An aerosol container 20C having a
longitudinal axis and comprising:
[0107] an outer container 22 comprising a closed end bottom and an
open neck 24 longitudinally opposed thereto, said open neck 24
having a valve 28 joined to said outer container 22 in fluid tight
relationship,
[0108] said valve 28 having a valve stem 28S projecting upwardly to
a valve stem 28S distal end,
[0109] a product delivery device 55, 56 joined to at least one of
said valve 28 and said outer container 22 in fluid tight
relationship, and
[0110] a sheath 28P extending upwardly to a sheath distal end, said
distal end of said sheath 28P being at or above said valve stem 28
distal end. [0111] B. An aerosol container 20C according to
paragraph A wherein said sheath circumscribes said valve stem 28S.
[0112] C. An aerosol container 20C according to paragraphs A and B
wherein said sheath 28P projects upwardly from a sheath proximal
end joined to said valve 28. [0113] D. An aerosol container 20C
according to paragraphs A, B and C wherein said sheath 28P projects
upwardly from a sheath proximal end joined to said valve 28, said
sheath 28P being integral with said valve 28. [0114] E. An aerosol
container 20C according to paragraphs A and B wherein said sheath
28P projects upwardly from a sheath proximal end joined to said
outer container 22. [0115] F. An aerosol container 20C according to
paragraphs A, B and E wherein said sheath 28P projects upwardly
from a sheath proximal end joined to said outer container 22 said
sheath 28P being integral with said outer container 22, and further
comprising propellant 40 within said outer container 22. [0116] G.
A normally closed valve 28 for an aerosol container 20C, said
normally closed valve 28 having a longitudinal axis and comprising:
[0117] a housing 28H, a moving assembly 28M disposed in said
housing 28H, a valve stem 28S disposed in said moving assembly 28M,
said valve stem 28S projecting longitudinally to a valve stem 28S
distal end, a sheath 28P disposed radially outboard of said valve
stem 28S and projecting longitudinally to at least one sheath
distal end, said sheath distal end projecting longitudinally
further than said valve stem 28S distal end. [0118] H. A valve 28
according to paragraph G wherein said sheath 28P comprises at least
one discrete, upstanding strut 28P, spaced radially from said valve
stem 28S. [0119] I. A valve 28 according to paragraphs G and H
wherein said sheath 28P comprises at least three discrete, equally
circumferentially spaced upstanding struts 28P, each said strut 28P
being parallel said longitudinal axis. [0120] J. A valve 28
according to paragraph G wherein said sheath 28P circumscribes said
valve stem 28S and extends longitudinally thereabove. [0121] K. A
valve 28 according to paragraphs G and J wherein said sheath 28P
circumscribes said valve stem 28S, said sheath 28P having an inner
periphery and an outer periphery opposed thereto, said sheath 28P
further comprising a plurality of longitudinally oriented blades
28B joined to one of said inner periphery and said outer periphery
and extending radially therefrom. [0122] L. A valve 28 according to
paragraphs G, J and K wherein said sheath 28P circumscribes said
valve stem 28S, said sheath 28P having an inner periphery and an
outer periphery opposed thereto, said sheath 28P further comprising
a plurality of longitudinally oriented blades 28B integral with and
extending radially inwardly from said inner periphery. [0123] M. A
valve 28 according to paragraphs G, J, K and L wherein said sheath
28P circumscribes said valve stem 28S, said sheath 28P having an
inner periphery and an outer periphery opposed thereto, said sheath
28P further comprising a plurality of longitudinally oriented
blades 28B joined to one of said inner periphery and said outer
periphery and extending radially therefrom, wherein said sheath 28P
comprises PET, said housing 28H comprises PET and said moving
assembly 28M comprises TPE. [0124] N. A valve 28 according to
paragraph G wherein said sheath 28P comprises at least four
discrete, equally circumferentially spaced upstanding struts 28P,
each said strut 28P being parallel said longitudinal axis, each
strut 28P having a face so that said strut 28P can act as a blade
responsive to axial torque applied thereto. [0125] O. An outer
container 22 for an aerosol container 20C usable as an aerosol
dispenser 20, said outer container 22 having a longitudinal axis
and comprising:
[0126] a closed end bottom and an open neck 24 longitudinally
opposed thereto, said neck 24 having a neck diameter, a sheath 28P
projecting longitudinally upward from said neck 24, said sheath 28P
having a sheath diameter greater than said neck diameter. [0127] P.
An outer container 22 according to paragraph O further
comprising:
[0128] a valve cup 26 joined to said outer container 22 in fluid
tight relationship,
[0129] a valve 28 disposed within said valve cup 26, said valve 28
having an upwardly projecting valve stem 28S, said valve stem 28S
being disposed longitudinally at or below said sheath 28P,
[0130] a product delivery device 55, 56 joined to at least one of
said valve 28 and said outer container 22 in fluid tight
relationship, and
[0131] propellant 40 disposed within said outer container 22.
[0132] Q. An outer container 22 according to paragraphs O and P
further comprising:
[0133] a valve cup 26 joined to said outer container 22 in fluid
tight relationship,
[0134] a valve 28 disposed within said valve cup 26, said valve 28
having an upwardly projecting valve stem 28S, said valve stem 28S
being disposed longitudinally at or below said sheath 28P,
[0135] a product delivery device 55, 56 joined to said outer
container 22 or said valve 28 in fluid tight relationship, and
[0136] propellant 40 disposed within said outer container 22,
[0137] wherein said product delivery device 55, 56 comprises a bag
55 joined to at least one of said valve 28 and said outer container
22 in fluid tight relationship. [0138] R. An outer container 22
according to paragraphs O, P and Q further comprising:
[0139] a valve cup 26 joined to said outer container 22 in fluid
tight relationship,
[0140] a valve 28 disposed within said valve cup 26, said valve 28
having an upwardly projecting valve stem 28S, said valve stem 28S
being disposed longitudinally at or below said sheath 28P,
[0141] a product delivery device 55, 56 joined to said outer
container 22 or said valve 28 in fluid tight relationship, and
[0142] propellant 40 disposed within said outer container 22,
[0143] wherein said product delivery device 55, 56 comprises one of
a bag 55 and dip tube 56 joined to at least one of said valve 28
and said outer container 22 in fluid tight relationship,
[0144] wherein said sheath 28P circumscribes said valve stem 28S.
[0145] S. An outer container 22 according to paragraphs O, P, Q and
R further comprising:
[0146] a valve cup 26 joined to said outer container 22 in fluid
tight relationship,
[0147] a valve 28 disposed within said valve cup 26, said valve 28
having an upwardly projecting valve stem 28S, said valve stem 28S
being disposed longitudinally at or below said sheath 28P,
[0148] a product delivery device 55, 56 joined to said valve 28 in
fluid tight relationship, and
[0149] propellant 40 disposed within said outer container 22,
[0150] wherein said product delivery device 55, 56 comprises at
least one of a bag 55 and dip tube 56 joined to at least one of
said valve 28 and said outer container 22 in fluid tight
relationship,
[0151] wherein said sheath 28P circumscribes said valve stem 28S,
said sheath 28P projecting upwardly from a proximal end in a
direction substantially parallel to said longitudinal axis and
having a constant wall thickness. [0152] T. An outer container 22
according to paragraphs O, P and Q further comprising:
[0153] a valve cup 26 joined to said outer container 22 in fluid
tight relationship,
[0154] a valve 28 disposed within said valve cup 26, said valve
having an upwardly projecting valve stem 28S, said valve stem 28S
being disposed longitudinally at or below said sheath 28P,
[0155] a product delivery device 55, 56 joined to said valve 28 in
fluid tight relationship, and
[0156] propellant 40 disposed within said outer container 22,
[0157] wherein said product delivery device 55, 56 comprises at
least one of a bag 55 and dip tube 56 joined to at least one of
said valve 28 and said outer container 22 in fluid tight
relationship,
[0158] wherein said sheath 28P comprises at least three
circumferentially spaced upstanding struts 28P, said struts 28P
being disposed radially outward of said valve stem 28S and being
integral with said outer container 22.
[0159] The dimensions and values disclosed herein are not to be
understood as being strictly limited to the exact numerical values
recited. Instead, unless otherwise specified, each such dimension
is intended to mean both the recited value and a functionally
equivalent range surrounding that value. For example, a dimension
disclosed as "40 mm" is intended to mean "about 40 mm" and a
pressure disclosed as "about 1100 kPa" is intended to include
1103.2 kPa.
[0160] Every document cited herein, including any cross referenced
or related patent or application, is hereby incorporated herein by
reference in its entirety unless expressly excluded or otherwise
limited. The citation of any document is not an admission that it
is prior art with respect to any invention disclosed or claimed
herein or that it alone, or in any combination with any other
reference or references, teaches, suggests or discloses any such
invention. Further, to the extent that any meaning or definition of
a term in this document conflicts with any meaning or definition of
the same term in a document incorporated by reference, the meaning
or definition assigned to that term in this document shall govern.
All limits shown herein as defining a range may be used with any
other limit defining a range. That is the upper limit of one range
may be used with the lower limit of another range, and vice
versa.
[0161] While particular embodiments of the present invention have
been illustrated and described, it would be obvious to those
skilled in the art that various other changes and modifications can
be made without departing from the spirit and scope of the
invention. It is therefore intended to cover in the appended claims
all such changes and modifications that are within the scope of
this invention.
* * * * *