B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
222/54
B65D 83/14 (2006.01)
Patent
CA 1048453
AEROSOL CONTAINERS FOR DELIVERING HIGH ACTIVE CONCENTRATION AEROSOL COMPOSITIONS AT A LOW DELIVERY RATE ABSTRACT OF THE DISCLOSURE An aerosol container is provided for delivering liquid aerosol compositions highly concentrated with respect to the active ingredient at a low delivery rate, thereby conserving propellant, since less propellant is required to deliver an equivalent amount of active component per unit time, and comprising, in combination, a pressurizable container having a valve movable between open and closed positions, a valve stem, and a delivery port; a valve stem orifice in the valve stem in flow connection at one end with a blending space and at the other end with an aerosol- conveying valve stem passage leading to the delivery port; the valve stem orifice having a diameter within the range from about 0.50 to about 0.65 mm; bias means for holding the valve in a closed position; means for manipulating the valve against the bias means to an open position for expulsion of aerosol composition via the valve stem orifice to the delivery port; wall means defining the blending space and separating the blending space from liquid aerosol composition and propellant within the container; at least one liquid tap orifice through the wall means, having a cross-sectional open area within the range from about 0.4 and 0.6 mm2 for flow of liquid aerosol composition into the blending space; at least one vapor tap orifice through the wall means, having a cross- sectional open area within the range from about 0.4 to about 0.8 mm2 for flow of propellant into the blending space; the ratio of liquid tap orifice to vapor tap orifice cross-sectional open area being within the range from about 0.5 to about 0.9; the open areas of the liquid tap orifice and vapor tap orifice being selected within the stated ranges to provide a volume ratio of propellant gas:liquid aerosol composition within the range from about 10:1 to about 40:1, thereby limiting the delivery rate of liquid aerosol composition from the container when the valve is opened. In the special case where the liquid tap orifice is a capillary dip tube, the cross-sectional open area thereof is within the range from about 0.6 to about 1.3 mm2, for flow of liquid aerosol composition into the blending space, and at least one vapor tap orifice through the wall means has a cross-sectional open area within the range from about 0.4 to about 0.8 mm2 for flow of propellant gas into the blending space; and the ratio of capillary dip tube to vapor tap cross-sectional open area is within the range from about 1.0 to about 2Ø
281798
Marra Dorothea C.
Osipow Lloyd I.
Small Marvin
Spitzer Joseph G.
Marra Dorothea C.
Osipow Lloyd I.
Small Marvin
Spitzer Joseph G.
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