초록 ▼

A dispensing spray container which delivers only liquid whether in the upright or inverted position. A container with an exit port from a storage cavity is fitted with an imperforate dip tube having an open-end located farthest from the exit port to feed the liquid when the container is in the uprig

A dispensing spray container which delivers only liquid whether in the upright or inverted position. A container with an exit port from a storage cavity is fitted with an imperforate dip tube having an open-end located farthest from the exit port to feed the liquid when the container is in the upright position. In circuit with the dip tube is a porous element located nearest to the exit port whose surface conditions are such that when wetted by the liquid will from a force resulting from the liquid surface tension to prevent the gas from passing when the container is in the upright position and which will pass liquid when held in the inverted position.

대표청구항 ▼

[ We claim:] [1.] A spray container for dispensing a liquid, said container having an upright axis, and comprising:an impermeable boundary wall forming a storage cavity to contain said liquid, said boundary wall having an exit port passing through it from the cavity, said exit port being atop said c

[ We claim:] [1.] A spray container for dispensing a liquid, said container having an upright axis, and comprising:an impermeable boundary wall forming a storage cavity to contain said liquid, said boundary wall having an exit port passing through it from the cavity, said exit port being atop said cavity when the container is in its upright position, said container being adapted to deliver liquid at all orientations of said axis relative to the vertical;a dip tube extending from said exit port into said cavity, said dip tube having a tubular wall and a central passage in said tubular wall extending from said exit port, said passage having an open end inside said cavity; andporous means in said cavity adjacent to said exit port providing a flow path for liquid from said cavity to said exit port;said porous means being formed of a material which is wettable by said liquid and having a plurality of pores of such size as will permit the flow through them of said liquid, and when wetted by said liquid will prevent flow of gas through said pores;whereby, when said container is in said upright position, a lesser pressure outside of said exit port than in said cavity will cause exit of liquid from the cavity through the dip tube and exit port, while the porous means when wetted by the contents prevents exit of gas from the cavity through said porous means, and when the container is inverted, and said pressure difference exists, liquid will be delivered from the liquid in the dip tube and also from liquid that passes through said porous means until the level of the liquid in the dip tube falls by an increment relative to the level of the fluid in the container that is equal to the pressure drop across the porous means divided by the density of the liquid, after which liquid is delivered to the exit port only through the porous means.