US20160009481A1 - Aerosol valve with defined flow paths - Google Patents

Aerosol valve with defined flow paths Download PDF

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Publication number
US20160009481A1
US20160009481A1 US14/777,128 US201414777128A US2016009481A1 US 20160009481 A1 US20160009481 A1 US 20160009481A1 US 201414777128 A US201414777128 A US 201414777128A US 2016009481 A1 US2016009481 A1 US 2016009481A1
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Prior art keywords
valve stem
product formulation
valve
aerosol
aerosol valve
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Abandoned
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US14/777,128
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English (en)
Inventor
John B. Fore
Michael Paul Downey
Geoffrey Brace
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Precision Valve Corp
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Precision Valve Corp
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Publication date
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Priority to US14/777,128 priority Critical patent/US20160009481A1/en
Assigned to PRECISION VALVE CORPORATION reassignment PRECISION VALVE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRACE, GEOFFREY, DOWNEY, MICHAEL PAUL, FORE, JOHN B.
Assigned to PRECISION VALVE CORPORATION reassignment PRECISION VALVE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRACE, GEOFFREY, DOWNEY, MICHAEL PAUL, FORE, JOHN B.
Publication of US20160009481A1 publication Critical patent/US20160009481A1/en
Assigned to BNP PARIBAS, AS COLLATERAL AGENT reassignment BNP PARIBAS, AS COLLATERAL AGENT INTELLECTUAL PROPERTY SECURITY AGREEMENT Assignors: PRECISION VALVE CORPORATION
Assigned to CANADIAN IMPERIAL BANK OF COMMERCE reassignment CANADIAN IMPERIAL BANK OF COMMERCE CHANGE IN SECURED PARTY Assignors: PRECISION VALVE CORPORATION
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/48—Lift valves, e.g. operated by push action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/32—Dip-tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/34—Cleaning or preventing clogging of the discharge passage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/44—Valves specially adapted therefor; Regulating devices
    • B65D83/46—Tilt valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0483—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with gas and liquid jets intersecting in the mixing chamber

Definitions

  • the present disclosure relates to the field of aerosol valves for delivery of product formulations having solids. More particularly, the present disclosure relates to an aerosol valve having a valve stem, compression spring, and a hard stop that prevents full compression of the compression spring when the valve stem is pressed by the consumer to dispense the product formulations having solids, creating defined flow paths.
  • Aerosol valve structures for product formulations that contain solids can fail because of agglomeration (clumping) of solids in the flow passages in the internal space of the valve stem housing.
  • Conventional designs of aerosol valves often employ flow paths that have long, narrow channels, abrupt changes in flow direction, and areas of recirculation—any or all of which can cause solids in the product formulation to clump and clog the flow paths.
  • conventional aerosol valves have a compression spring that is fully compressed (i.e., the individual spring coils are pressed tightly together) when the valve stem is fully pressed by a consumer to dispense or spray the product.
  • the compressed spring coils form a barrier to the product formulation that is flowing upward, and so forces the product and propellant to follow a flow path that is nearly entirely along the outside of the fully-compressed spring coils, since there is little or no space between the spring coils to permit the product formulation and propellant to flow in between the spring coils or access the volume in the center of the compression spring.
  • a fully-compressed (i.e., coil-bound) compression spring in the conventional aerosol valve therefore, provides little or no product mixing, or little surface to break up clumps of solids that may accumulate and clog flow paths.
  • the coil-bound compression spring coils form a barrier that keeps the majority of product flow on the outside, the aperture (vapor tap) only impinges a small portion of the product flow path and so does not take in the maximum potential amount of product or propellant.
  • the present disclosure provides an aerosol valve that provides an additional flow path for the product and propellant that improves mixing of the product formulation.
  • the present disclosure also provides such an aerosol valve that provides an additional flow path for the product and propellant that improves mixing of the product formulation, reduces agglomeration of solids in the product that might otherwise clog the flow paths in the aerosol valve, increases turbulence of the product formulation as it flows through the aerosol valve, and feeds more of the product directly to the aperture for better dispensing of the product.
  • the present disclosure further provides an aerosol valve having a valve stem, housing, compression spring, and a hard stop between the valve stem and housing.
  • the hard stop prevents the compression spring from becoming fully-compressed (coil-bound) when the consumer presses on the valve stem to dispense a product, so that there are open spaces between adjacent coils of the compression spring.
  • the present disclosure still further provides that the resulting open spaces between the coils of the compression spring create an additional flow path for the product formulation and propellant that provides access to the product and propellant into the center space circumscribed by the compression spring.
  • the compression spring has these open spaces that can function as a baffle and a static mixer for the product formulation to improve the mixing of the solids in the product formulation as they flow through the aerosol valve.
  • the present disclosure further provides that the spaces between the coils of the compression spring also increase turbulence in the flow path, and can break up agglomerations of solids in the product formulation that might otherwise clog the flow path.
  • the aerosol valve structure directs the ingress of the product to preferentially flow through the center of the spring diameter, and to exit as a cascade through the open coils over the upper end of the compression spring.
  • the aperture is positioned adjacent to the open spring coils to maximize impingement of the product and propellant into the center of the fluid flow in the interior space formed by the compression spring.
  • the aerosol valve has a valve stem with large cross-section passageways that allow the product formulation to flow directly from the dip-tube through the center of the compression spring. This configuration allows the product flow to be gently deflected around the valve stem, which reduces back pressure (resistance).
  • FIG. 1 is a prior art aerosol valve in full stroke, illustrating the flow paths around the outside of the fully-compressed (coil-bound) compression spring.
  • FIG. 2 is a side view of an exemplary embodiment of an aerosol valve of the present disclosure, with a cut-away showing some of the interior structures in the aerosol valve.
  • FIG. 3 is a side view of the exterior of the valve stem portion of the aerosol valve in FIG. 2 .
  • FIG. 4A is a side view of the valve stem housing portion of the aerosol valve in FIG. 2 .
  • FIG. 4B is a cut-away of a portion of FIG. 4A to show some of the interior structures in the aerosol valve stem housing.
  • FIG. 5 is a cross-section of an exemplary embodiment of an aerosol valve of the present disclosure in a closed position (resting mode), and seated in the top of an aerosol container.
  • FIG. 6 is a cross-section of the aerosol valve in FIG. 5 in an open (fully-actuated) position.
  • FIG. 7 is an exploded view of a portion of the aerosol valve in FIG. 6 , illustrating the contacts between the valve stem and the compression spring, and the hard stop between the valve stem and the valve stem housing.
  • FIG. 8 is an illustration showing how the gas and liquid mix in the aerosol valve.
  • FIGS. 9A , 9 B, 9 C, and 9 D are cross-section perspective views of an exemplary embodiment of an aerosol valve of the present disclosure showing the primary and secondary flow paths at various positions of the aerosol valve stem.
  • FIG. 9A shows the aerosol valve in its closed position (resting mode).
  • FIG. 9B shows the aerosol valve when the valve is slightly cracked to an open position.
  • FIG. 9C shows the aerosol valve in a partially open position (mid-stroke).
  • FIG. 9D shows the aerosol valve in a fully-open position (full stroke).
  • FIGS. 10A , 10 B, and 10 C are further cross-section side views of an exemplary embodiment of an aerosol valve of the present disclosure, in a closed position (resting mode), a partially open position (mid-stroke), and a fully-open position (fully-actuated mode), respectively.
  • FIGS. 11A , 11 B, 11 C, and 11 D are cross-section perspective views of another exemplary embodiment of an aerosol valve of the present disclosure showing the primary and secondary flow paths at various positions of the aerosol valve stem.
  • FIG. 11A shows the aerosol valve in its closed position (resting mode).
  • FIG. 11B shows the aerosol valve when the valve is slightly cracked to an open position.
  • FIG. 11C shows the aerosol valve in a partially open position (mid-stroke).
  • FIG. 11D shows the aerosol valve in a fully-open position (full stroke).
  • FIGS. 12A , 12 B, and 12 C are cross-section side views of another exemplary embodiment of an aerosol valve of the present disclosure, in a closed position (resting mode), a partially open position (mid-stroke), and a fully-open position (fully-actuated mode), respectively.
  • FIGS. 13A , 13 B, 13 C, and 13 D are cross-section perspective views of still another exemplary embodiment of an aerosol valve of the present disclosure showing the primary and secondary flow paths at various positions of the aerosol valve stem.
  • FIG. 13A shows the aerosol valve in its closed position (resting mode).
  • FIG. 13B shows the aerosol valve when the valve is slightly cracked to an open position.
  • FIG. 13C shows the aerosol valve in a partially open position (mid-stroke).
  • FIG. 13D shows the aerosol valve in a fully-open position (full stroke).
  • FIG. 14 is a cross-section view of yet another exemplary embodiment of an aerosol valve of the present disclosure in a closed position (resting mode).
  • FIGS. 15A and 15B are cross-section perspective views of yet another exemplary embodiment of an aerosol valve of the present disclosure showing the primary and secondary flow paths when the valve is open and closed.
  • FIG. 15A shows the aerosol valve in its closed position (resting mode).
  • FIG. 15B shows the aerosol valve when the valve is fully tilted (full stroke).
  • FIGS. 16A and 16B are cross-section perspective views of another exemplary embodiment of an aerosol valve of the present disclosure showing the primary and secondary flow paths when the valve is open and closed.
  • FIG. 16A shows the aerosol valve in its closed position (resting mode).
  • FIG. 16B shows the aerosol valve when the valve is fully tilted (full stroke).
  • FIG. 17A is an illustration of CFD tests to show the flow streams of the product and propellant through and over the compression spring coils inside the valve stem housing of an embodiment of the aerosol valve of the present disclosure.
  • FIG. 17B is another view of the flow streams in FIG. 17A , without the surrounding aerosol valve structures, so the flow streams are clearly shown.
  • FIG. 18A is an illustration of CFD tests to show the flow streams of the product and propellant through the compression spring coils inside the valve stem housing of another embodiment of the aerosol valve of the present disclosure having the spring seat filled in.
  • FIG. 18B is another view of the flow streams in FIG. 18A , without the surrounding aerosol valve structures, so the flow streams are clearly shown.
  • FIG. 1 that is a conventional or prior art aerosol valve generally represented by reference numeral 10 .
  • Valve 10 shown in FIG. 1 in full stroke, shows the flow path of the product formulation around the outside of the compression spring before the formulation is able to enter the center hole (aperture) of the valve stem.
  • Aerosol valve 10 includes a dip tube 12 , compression spring 14 , valve stem 16 , valve stem housing 18 , mounting cup 20 , and seal 22 .
  • Valve stem 16 is enclosed in valve stem housing 18 .
  • Valve stem 16 has a pair of apertures (not shown in FIG. 1 ) through which a pressurized high-solids product formulation passes in order to enter center hole 24 of valve stem 16 .
  • Mounting cup 20 orients and stabilizes aerosol valve 10 in its proper position on the product.
  • Valve stem 16 contacts compression spring 14 at contact point 26 .
  • Compression spring 14 exerts an upward pressure on valve stem housing 18 , which is pressed against seal 22 that is located on the inner aspect of mounting cup 20 .
  • Valve stem 16 has an upper portion that protrudes through seal 22 and mounting cup 20 , and which is pressed by the consumer to spray the product formulation.
  • valve stem 16 When valve stem 16 is pressed down by the consumer to spray the product, the product formulation flows upward through the internal space of valve stem housing 18 in a flow path 30 .
  • compression spring 14 is fully compressed (i.e., fully-actuated), pushing together the individual coils of compression spring 14 so there is little or no space between any of the individual coils.
  • the coils of compression spring 14 act as a barrier to the space that is inside the compression spring, requiring the product formulation to flow upwardly by a long path through valve stem housing 18 that is almost entirely along the outside of compression spring 14 .
  • This long, tortuous primary flow path 30 increases the probability that the solids in the product formulation will agglomerate and clog the flow path, causing the passage of the product formulation in the flow path to be slowed or blocked altogether, leading to product failure.
  • FIGS. 2 through 10 show several exemplary embodiments of an aerosol valve 40 of the present disclosure.
  • FIGS. 2 to 4 show a first embodiment of aerosol valve 40 that includes a dip tube 42 , compression spring 44 , valve stem 46 , valve stem housing 48 , mounting cup 50 , and seal 52 .
  • Valve stem 46 is enclosed in valve stem housing 48 .
  • Valve stem 46 has a valve stem aperture 58 through which a pressurized high-solids product formulation passes in order to enter center hole 54 of valve stem 46 .
  • FIGS. 5 and 6 show a mounting cup 50 that orients and stabilizes aerosol valve 40 in its proper position on the aerosol container.
  • Compression spring 44 exerts an upward pressure on valve stem housing 48 , which is pressed against seal 52 that is positioned on an inner aspect of mounting cup 50 .
  • Valve stem 46 has an upper portion that protrudes through seal 52 and mounting cup 50 , and which is pressed by the consumer to dispense (spray) the product formulation.
  • FIG. 7 shows that aerosol valve 40 has a hard stop 49 between valve stem 46 and valve stem housing 48 .
  • Valve stem 46 contacts compression spring 44 at contact point 56 .
  • Hard stop 49 prevents valve stem 46 from fully compressing compression spring 44 so that, even when the consumer presses down fully on valve stem 46 to dispense (spray) the product formulation, the individual coils of compression spring 44 retain some space therebetween; i.e., even when valve stem 46 is fully-actuated, compression spring 44 does not become “coil-bound” (i.e., having little or no space between adjacent coils of the spring).
  • Aerosol valve 40 has fewer abrupt changes in flow direction, as compared with the flow paths of aerosol valves in the prior art. This reduces the propensity of the solids in the product formulation to agglomerate in the flow paths, by providing fewer loci at which the particles may accumulate, and thereby reduces product failures.
  • valve stem 46 has four (4) passageways (not shown) that are large in cross-section, to minimize drag and thereby reduce agglomeration of the solids in the product formulation as the product passes through, reducing the incidence of product failure.
  • Valve stem 46 is preferably a thinned valve stem body. These structures and configuration reduce back pressure (resistance) to the flow of the product formulation before it reaches valve stem aperture(s) 58 . This is an advantage over conventional valve flow paths, which require abrupt changes in flow direction and passage through long, narrow channels prior to arriving at the valve stem apertures.
  • compression spring 44 when not fully compressed, has open spaces 45 formed between adjacent coils of the compression spring. This permits the coils of compression spring 44 to function as a “baffle” and/or as a “static mixer” for the components of the product formulation.
  • Spaces 45 between the individual coils in compression spring 44 increase turbulence along the flow paths of the product and propellant. This turbulence can break up agglomerations of solids in the product formulation as it moves along the flow path, thereby reducing the likelihood that solids will agglomerate and clog any of the flow paths. In this way, the coils of compression spring 44 can “atomize” the solids in the product formulation; i.e., maintain the solids at their smallest individual particle size, on average, with few or zero “clumps” of solids.
  • Spaces 45 between the coils of compression spring 44 also improve the mixing of the product formulation as the solids flow through aerosol valve 40 .
  • Spaces 45 between the coils of compression spring 44 also direct the ingress of the product formulation to preferentially flow through the center of compression spring 44 and exit as a cascade through the open coils and over the upper end of compression spring 44 .
  • Spaces 45 between the coils of the compression spring 44 create an additional defined flow path for the product and propellant that improves mixing of the product formulation, reduces agglomeration of solids that might otherwise block the flow path, increases turbulence of the product formulation as it flows through the aerosol valve, and feeds more of the product directly to the aperture for better dispensing of the product.
  • Seal 52 is a flexible material that seals the space between mounting cup 50 and valve stem housing 48 .
  • Seal 52 is preferably made of rubber or similar flexible material.
  • Seal 52 is preferably shaped as a gasket. A seal between seal 52 , valve stem housing 48 and mounting cup 50 occurs by compression during crimping of cup 50 . Pressing on valve stem 46 can somewhat deform the gasket-like seal between seal 52 and valve stem housing 48 as well as between seal 52 and mounting cup 50 .
  • Dip tube 42 is the access point for the stored product formulation in the container (not shown) to aerosol valve 40 .
  • Aerosol valve 40 preferentially forms the largest possible flow path cross-sections that are viable, given the constraints of the valve stem housing, compression spring geometry, and valve stem molding capability (for strength and moldability).
  • FIG. 8 shows how the liquid flow and gas mix together in the aerosol valves of the present disclosure (shown as aerosol valve 40 , with valve stem housing 48 and center hole 54 labeled for reference).
  • FIGS. 9A , 9 B, 9 C, and 9 D show the primary and secondary flow paths through aerosol valve 40 at various positions of valve stem 46 .
  • FIG. 9A shows aerosol valve 40 in its closed position (resting mode) when there is no flow.
  • FIG. 9B shows aerosol valve 40 in a slightly cracked position, where valve stem 46 presses slightly on compression spring 44 , creating a primary flow path 60 and a secondary flow path 62 between the individual coils in compression spring 44 .
  • FIG. 9C shows aerosol valve 40 in a partially open position (mid-stroke), illustrating primary flow path 60 and secondary flow path 62 as valve stem 46 presses somewhat more fully on compression spring 44 .
  • FIG. 9A shows aerosol valve 40 in its closed position (resting mode) when there is no flow.
  • FIG. 9B shows aerosol valve 40 in a slightly cracked position, where valve stem 46 presses slightly on compression spring 44 , creating a primary flow path 60 and a secondary flow path 62 between the individual coils in compression spring 44 .
  • valve stem 46 is fully actuated and reaches a hard stop (not shown) to partially, but not completely, compress compression spring 44 .
  • the hard stop can be, but does not have to be, part of the interior surface of valve stem housing 48 that interacts with (e.g., contacts) valve stem 46 .
  • Compression spring 44 does not become coil-bound, and some space is maintained between the individual coils of the compression spring to form a flow path for the product and propellant.
  • FIGS. 10A , 10 B and 10 C show cross-sections of an embodiment of aerosol valve 40 in its various stages as the valve stem is pressed by the consumer.
  • FIG. 10A shows aerosol valve 40 an unactuated, closed position (resting mode).
  • FIG. 10B shows aerosol valve 40 in a partially-open position (mid-stroke).
  • FIG. 10C shows aerosol valve 40 in a fully-open position (fully-actuated mode).
  • FIGS. 11A , 11 B, 11 C, and 11 D show the primary and secondary flow paths through another embodiment of aerosol valve 40 at various positions of valve stem 46 .
  • FIG. 11A shows aerosol valve 40 in its closed position (resting mode), when there is no flow.
  • FIG. 11B shows aerosol valve 40 in a slightly cracked position, where valve stem 46 presses slightly on compression spring 44 , creating a primary flow path 60 .
  • FIG. 11C shows aerosol valve 40 in a partially open position (mid-stroke), illustrating primary flow path 60 as valve stem 46 presses somewhat more fully on compression spring 44 .
  • FIG. 11D shows primary flow path 60 when aerosol valve 40 is in a fully-open position (full stroke).
  • valve stem 46 is fully actuated and reaches a hard stop (not shown) so as to partially compress compression spring 44 .
  • the hard stop can be, but does not have to be, part of the interior of valve stem housing 48 that contacts valve stem 46 .
  • FIGS. 12A , 12 B and 12 C show cross-sections of yet another embodiment of an aerosol valve of the present disclosure, represented generally as aerosol valve 70 .
  • Aerosol valve 70 is shown in its various stages as the valve stem is pressed by the consumer.
  • FIG. 12A shows aerosol valve 70 an unactuated, closed position (resting mode).
  • FIG. 12B shows aerosol valve 70 in a partially-open position (mid-stroke).
  • FIG. 12C shows aerosol valve 70 in a fully-open position (fully-actuated mode).
  • FIGS. 13A , 13 B, 13 C, and 13 D show the primary and secondary flow paths through aerosol valve 70 at various positions of valve stem 76 .
  • FIG. 13A shows aerosol valve 70 in its closed position (resting mode) when there is no flow.
  • FIG. 13B shows aerosol valve 70 in a slightly cracked position, where valve stem 76 presses slightly on compression spring 74 , creating a primary flow path 80 and a secondary flow path 82 between the individual coils of compression spring 74 .
  • FIG. 13C shows aerosol valve 70 in a partially open position (mid-stroke), illustrating primary flow path 80 and secondary flow path 82 as valve stem 76 presses somewhat more fully on compression spring 74 .
  • FIG. 13A shows aerosol valve 70 in its closed position (resting mode) when there is no flow.
  • FIG. 13B shows aerosol valve 70 in a slightly cracked position, where valve stem 76 presses slightly on compression spring 74 , creating a primary flow path 80 and a secondary flow path 82 between the individual coils
  • 13D shows primary flow path 80 and secondary flow path 82 when aerosol valve 70 is in a fully-open position (full stroke).
  • valve stem 76 is fully actuated and reaches a hard stop (not shown) to partially compress compression spring 74 .
  • compression spring 74 does not become coil-bound, and some space is maintained between the individual coils of the spring to form a flow path for the product and propellant.
  • FIG. 14 shows yet another embodiment of an aerosol valve of the present disclosure, represented generally as aerosol valve 90 .
  • Aerosol valve 90 is shown in an unactuated, closed position (resting mode).
  • FIG. 15A and FIG. 15B show the primary and secondary flow paths through another embodiment of the aerosol valve when aerosol valve 90 is in a closed position and in a fully-open position (tilted), respectively.
  • aerosol valve 90 is actuated by tilting the valve stem.
  • tilting means the valve stem is inclined away from its vertical position at rest, and “tilting” means pushing against the top portion of the valve stem so that the valve stem is inclined away from its vertical position at rest.
  • the valve stem can be tilted between about 5% and about 10% from the vertical position to actuate the aerosol valve.
  • FIG. 15A shows valve stem 96 in its closed position (resting mode), and there are no flow paths.
  • FIG. 15B shows the aerosol valve when valve stem 96 is fully tilted (i.e., full stroke), and the resulting primary flow path 100 and secondary flow path 102 .
  • FIG. 16A and FIG. 16B show another embodiment of aerosol valve 90 when the aerosol valve is in a closed position and in a fully-open position (valve stem is tilted), respectively.
  • FIG. 16A shows the aerosol valve and valve stem 96 in a closed position (resting mode), and there are no flow paths.
  • FIG. 16B shows the aerosol valve when the valve stem 96 is fully tilted (i.e., full stroke), and the resulting primary flow path 100 and secondary flow path 102 .
  • the product formulation of the present disclosure is a mixture of two types of media, such as a mixture of a powder (solids) and propellant.
  • a method of using the aerosol valve described above for delivery of a product formulation uses the aerosol valve having a hard stop that prevents full compression of the compression spring when the valve stem is pressed by the consumer to dispense the product.
  • the resulting spaces between the coils of the compression spring create an additional flow path for the product and propellant and can act as a baffle and/or static mixer.
  • the method improves mixing of the product formulation, reduces agglomeration of solids that might otherwise block the flow path, increases turbulence of the product formulation as it flows through the aerosol valve, and feeds more of the product directly to the aperture for better dispensing of the product.
  • the aerosol valve structure also permits loading the product and propellant into the aerosol container in a single production line, increasing the manufacturing rate, and reducing material usage.
  • FIGS. 17A and 17B provide the results of a CFD test that show the flow streams of the product and propellant through and over the compression spring coils inside the valve stem housing of an embodiment of the aerosol valve of the present disclosure.
  • Primary flow path 60 shows the flow of product and propellant as passing in and through compression springs 44 and valve stem housing 48 when valve stem 46 is pressed (opened) for the test).
  • FIG. 17B is another view of the flow streams in FIG. 17A , without the surrounding aerosol valve structures, so the flow streams are shown clearly.
  • FIGS. 18A and 18B provide the results of another CFD test that shows the flow streams of the product and propellant through the compression spring coils inside the valve stem housing of another embodiment of the aerosol valve of the present disclosure that has the spring seat filled in.
  • Primary flow path 60 shows the flow of product and propellant as passing in and through compression springs 44 and valve stem housing 48 when valve stem 46 is pressed (opened) for the test).
  • FIG. 18B is another view of the flow streams in FIG. 18A , without the surrounding aerosol valve structures, so the flow streams are shown clearly.
  • the word “about” for dimensions, weights, and other measures means a range that is ⁇ 10% of the stated value, more preferably ⁇ 5% of the stated value, and most preferably ⁇ 1% of the stated value, including all subranges therebetween.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)
US14/777,128 2013-03-15 2014-03-14 Aerosol valve with defined flow paths Abandoned US20160009481A1 (en)

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US14/777,128 US20160009481A1 (en) 2013-03-15 2014-03-14 Aerosol valve with defined flow paths

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Application Number Priority Date Filing Date Title
US201361798402P 2013-03-15 2013-03-15
US14/777,128 US20160009481A1 (en) 2013-03-15 2014-03-14 Aerosol valve with defined flow paths
PCT/US2014/027630 WO2014152696A1 (en) 2013-03-15 2014-03-14 Aerosol valve with defined flow paths

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BE1025177B1 (nl) * 2017-09-21 2018-11-29 Altachem Nv Klep voor een houder
BE1027882B1 (nl) * 2020-05-15 2021-07-12 Altachem Steel van een ventiel

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US3506241A (en) * 1967-07-06 1970-04-14 Pittsburgh Railways Co Tilt valve
US3447722A (en) * 1968-02-09 1969-06-03 Rexall Drug Chemical Plural source valved pressurized fluid dispenser
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US3612361A (en) * 1969-10-20 1971-10-12 Seaquist Valve Co Self-cleaning valve
US3758007A (en) * 1971-03-19 1973-09-11 Super Whip Valve Mfg Co Dispenser valve structure
US3937368A (en) * 1974-03-10 1976-02-10 Elmer Hoagland Aerosol actuator nozzle
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Publication number Priority date Publication date Assignee Title
US20190274455A1 (en) * 2016-11-04 2019-09-12 Altachem Nv Valve

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EP2969845B1 (en) 2020-08-05
ZA201506144B (en) 2019-04-24
AU2014239287A1 (en) 2015-09-03
CA2905990A1 (en) 2014-09-25
EP2969845A4 (en) 2016-11-16
BR112015023731A2 (pt) 2017-07-18
WO2014152696A1 (en) 2014-09-25
CN105263820B (zh) 2017-05-17
JP2016517374A (ja) 2016-06-16
AU2014239287B2 (en) 2018-03-15
EP2969845A1 (en) 2016-01-20
CN105263820A (zh) 2016-01-20
JP6309611B2 (ja) 2018-04-11
ES2829501T3 (es) 2021-06-01

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