Aerosol dispenser system

A valve unit for a pressurized aerosol dispenser having a container for containing under pressure a liquid product and a propellant, said unit comprising a valve housing which contains a single moveable valve body, and a single annular resilient valve gasket and a spring to bias the valve body upwardly toward closure, the valve body comprising a valve stem having a central passage surrounded by an annular passage and a neck of smaller diameter than said stem portion, said neck portion having a first transverse valve orifice in communication with said annular passage of the valve stem and a second transverse valve orifice remote from the first and in communication with the central passage of the valve stem, said neck portion being encompassed by the inner periphery of the annular gasket to close both valve orifices when the valve body is in the closed position and to be deflected away from both valve orifices when the body is depressed against the bias of the spring, and an impact mixing chamber connecting with said central and annular passages for mixing product and propellant.

A pressurized spray dispenser comprising a container for containing under pressure a liquid product and propellant and a valve unit, said valve unit comprising:

• a container closure element, a valve housing attached to the closure element, a gasket and a movable and retractable valve body within said valve housing, a valve stem associated with said valve body and having orifice means and conduit means for discharge of product ang gaseous propellant therethrough, a valve actuator, a product discharge orifice, and venturi ejector means disposed in the valve housing, said ejector means being disposed in a recess in the valve housing, comprising a member having a central conduit extending through its length, said member having an upper portion shaped to friction fit into the recess of the valve housing, the upper surface of said upper portion having an annular recess, an impact mixing chamber contiguous to the central conduit and transverse grooves extending from said annular recess to the mixing chamber, vertical conduit means defined by the inner wall of the recess in the bottom of the valve housing and the outer wall of the upper portion of the ejector, and extending to said annular recess which conduit means provide a flow path for the gaseous propellant to the annular recess.

A valve unit for a pressurized spray dispenser having a container for holding liquid product and propellant under pressure, said valve unit comprising a valve actuator having a discharge orifice, a valve housing having a bottom interior wall, a cut-out section in said bottom wall forming an impact mixing chamber, slots in said bottom wall extending outwardly from said cut-out section, an annular recess connected with said slots and openings in the outer vertical wall of said housing connecting to said annular recess, a central conduit extending through the bottom of said valve housing to said cut-out section and means for supplying propellant and product to said openings and central conduit, in combination with a plug having a central aperture communicating with said cut-out section in said valve housing, a spring forcing said plug against the bottom wall of the housing and means connecting the central aperture of said plug to said discharge orifice.