The invention provides a process and apparatus for delivering from a delivery port of an aerosol container having a vapor tap valve a spray of low flammability of a liquid aerosol composition containing a flammable liquefied propellant, which comprises mixing together liquid aerosol composition and gaseous propellant; subjecting the gas/liquid mixture to the constraint imposed by a flow constriction; expanding the gas/liquid mixture; subjecting the gas/liquid mixture to the constraint imposed by a second flow constriction, and again expanding the gas/liquid mixture and then passing the mixture through the remainder of the vapor tap valve to the delivery port; with each constraint and expansion increasing the gas:liquid volume ratio of the mixture and reducing the flammability of the mixture as a delivered spray.
申请公布号
US4230243(A)
申请公布日期
1980.10.28
申请号
US19780932067
申请日期
1978.08.08
申请人
SPITZER, JOSEPH G.;OSIPOW, LLOYD I.;SMALL, MARVIN;MARRA, DOROTHEA C.
发明人
SPITZER, JOSEPH G.;OSIPOW, LLOYD I.;SMALL, MARVIN;MARRA, DOROTHEA C.