Aerosol containers for foaming and delivering aerosols and process
First Claim
1. An aerosol container for foaming an aerosol composition therein prior to expulsion from the container, and then expelling the resulting foam, comprising, in combination, a pressurizable container having a valve movable between open and closed positions, with a valve stem, a foam-conveying passage therethrough and a delivery port in flow connection therewith;
- bias means for holding the valve in a closed position; and
means for manipulating the valve against the bias means to an open position, for expulsion of aerosol foamed composition within the container via the valve passage and delivery port;
means defining at least two separate compartments in the container, of which a first foam compartment is in direct flow connection with the valve passage, and a second propellant gas compartment is in flow connection with the valve passage only via the first foam compartment; and
porous bubbler means interposed between and providing the only flow communication between the first and second compartments, and having a plurality of through pores communicating the compartments, the pores being of sufficiently small dimensions to restrict flow of propellant gas from the second compartment therethrough and form bubbles of such gas in liquid aerosol composition in the first foam compartment across the line of flow from the bubbler to the valve, thereby to foam the aerosol composition in the first foam compartment upon opening of the valve to atmospheric pressure, and to expel foamed aerosol composition through the open valve.
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Accused Products
Abstract
An aerosol container is provided for foaming a liquid aerosol composition therein prior to expulsion from the container and then expelling the resulting foamed aerosol composition comprising, in combination, a pressurizable container having a valve movable between open and closed positions, with a valve stem and a foam-conveying passage therethrough in flow connection with a delivery port; at least two separate compartments in the container, of which a first compartment is in direct flow connection with the valve passage, and a second compartment is in flow connection with the valve passage only via the first compartment; and a porous bubbler having through pores interposed between the first and second compartments with the through pores communicating the two compartments, the pores being of sufficiently small dimensions to restrict flow of propellant gas from the second compartment therethrough and form bubbles of such gas in liquid aerosol composition across the line of flow from the porous bubbler to the valve, thereby to foam the aerosol composition upon opening of the valve to atmospheric pressure, and to expel foamed aerosol composition through the open valve. A process is also provided for foaming liquid aerosol compositions with a propellant gas prior to expulsion from an aerosol container.
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Citations
51 Claims
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1. An aerosol container for foaming an aerosol composition therein prior to expulsion from the container, and then expelling the resulting foam, comprising, in combination, a pressurizable container having a valve movable between open and closed positions, with a valve stem, a foam-conveying passage therethrough and a delivery port in flow connection therewith;
- bias means for holding the valve in a closed position; and
means for manipulating the valve against the bias means to an open position, for expulsion of aerosol foamed composition within the container via the valve passage and delivery port;
means defining at least two separate compartments in the container, of which a first foam compartment is in direct flow connection with the valve passage, and a second propellant gas compartment is in flow connection with the valve passage only via the first foam compartment; and
porous bubbler means interposed between and providing the only flow communication between the first and second compartments, and having a plurality of through pores communicating the compartments, the pores being of sufficiently small dimensions to restrict flow of propellant gas from the second compartment therethrough and form bubbles of such gas in liquid aerosol composition in the first foam compartment across the line of flow from the bubbler to the valve, thereby to foam the aerosol composition in the first foam compartment upon opening of the valve to atmospheric pressure, and to expel foamed aerosol composition through the open valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- bias means for holding the valve in a closed position; and
- 15. A process for foaming a liquid aerosol composition within an aerosol container prior to expulsion from the container, with the result that a foamed aerosol composition is expelled from the container, comprising bubbling a propellant gas into liquid aerosol composition in the container at a sufficient pressure and in a sufficient amount to foam the liquid aerosol composition while under confinement within the container, and then expelling the resulting foamed aerosol composition under propellant gas pressure within the container.
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27. An aerosol container for foaming an aerosol composition therein prior to expulsion from the container, and then expelling the resulting foam, comprising, in combination, a pressurizable container having a valve movable between open and closed positions, with a valve stem, a foam conveying passage therethrough and a delivery port in flow connection therewith;
- bias means for holding the valve in a closed position; and
means for manipulating the valve against the bias means to an open position, for expulsion of aerosol foamed composition within the container via the valve passage and delivery port;
means defining at least two separate compartments in the container of which a first compartment is in direct flow connection with the valve passage, and a second compartment is in flow connection with the valve passage only via the first compartment; and
porous bubbler means having through pores interposed between the first and second compartments with the through pores communicating the compartments, the pores being of sufficiently small dimensions to restrict flow of propellant gas from the second compartment therethrough and form bubbles of such gas in liquid aerosol composition across the line of flow from the bubbler to the valve, thereby to foam the aerosol composition upon opening of the valve to atmospheric pressure, and to expel foamed aerosol composition through the open valve, and a wick extending into the second compartment from the porous bubbler. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
- bias means for holding the valve in a closed position; and
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41. An aerosol container for foaming an aerosol composition therein prior to expulsion from the container, and then expelling the resulting foam, comprising, in combination, a pressurizable container having a valve movable between open and closed positions, with a valve stem, a foam-conveying passage therethrough and a delivery port in flow connection therewith;
- bias means for holding the valve in a closed position; and
means for manipulating the valve against the bias means to an open position, for expulsion of aerosol foamed composition within the container via the valve passage and delivery port;
means defining at least two separate compartments in the container, of which a first compartment is in direct flow connection with the valve passage, and a second compartment is in flow connection with the valve passage only via the first compartment;
two porous bubbler means, one interposed at one end of the first foam compartment and one interposed in the first foam compartment adjacen the valve, both being across the line of flow through the first foam compartment to the valve;
each porous bubbler means having through pores, the first mentioned porous bubbler means being interposed between the first and second compartments with the through pores communicating the compartments, the pores being of sufficiently small dimensions to restrict flow of propellant gas from the second compartment therethrough and form bubbles of such gas in liquid aerosol composition across the line of flow from the bubbler to the valve, thereby to foam the aerosol composition upon opening of the valve to atmospheric pressure, and to expel foamed aerosol composition through the open valve. - View Dependent Claims (42)
- bias means for holding the valve in a closed position; and
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43. An aerosol container for foaming an aerosol composition therein prior to expulsion from the container, and then expelling the resulting foam, comprising, in combination, a pressurizable container having a valve movable between open and closed positions, with a valve stem, a foam-conveying passage therethrough and a delivery port in flow connection therewith;
- bias means for holding the valve in a closed position, for expulsion of aerosol foamed composition within the container via the valve passage and delivery port;
means defining at least two separate compartments in the container of which a first foam compartment containing liquid aerosol composition to be foamed and expelled is in direct flow connection with the valve passage, and a second propellant compartment containing propellant and outside the first compartment is in flow connection with the valve passge only via the first compartment;
substantially all of the liquid aerosol composition to be foamed being retained in the first compartment, and substantially all of the propellant being retained in the second compartment; and
porous bubbler means having through pores interposed between the first and second compartments with the through pores communicating the compartments, the pores being of sufficiently small dimensions to restrict flow of propellant from the second compartment therethrough and form bubbles of propellant gas in liquid aerosol composition across the line of flow from the bubbler to the valve, thereby to foam the aerosol composition in the first compartment upon opening of the valve to atmospheric pressure, and to expel foamed aerosol composition through the open valve.
- bias means for holding the valve in a closed position, for expulsion of aerosol foamed composition within the container via the valve passage and delivery port;
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44. An aerosol container for foaming an aerosol composition therein prior to expulsion from the container, and then expelling the resulting foam, comprising, in combination, a pressurizable container having a valve movable between open and closed positions, with a valve stem, a foam-conveying passage therethrough and a delivery port in flow connection therewith;
- bias means for holding the valve in a closed position; and
means for manipulating the valve against the bias means to an open position, for expulsion of aerosol foamed composition within the container via the valve passage and delivery port;
means defining at least two separate compartments in the container, of which a first foam compartment is in direct flow connection with the valve passage, and a second compartment is in flow connection with the valve passage only via the first compartment; and
porous bubbler means having through pores interposed between the first foam compartment to the valve with the through pores communicating the compartments;
the porous bubbler retaining within its pores liquid aerosol composition to be foamed and expelled; and
the pores being of sufficiently small dimensions to restrict flow of propellant gas from the second compartment therethrough and form bubbles of such gas in liquid aerosol composition, thereby to foam the aerosol composition upon opening of the valve to atmospheric pressure, and to expel foamed aerosol composition through the open valve. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51)
- bias means for holding the valve in a closed position; and
Specification