Aerosol valve with differential flow control rate

Claim 1

A valve body for use in a valve assembly with an aerosol type container which is adapted to be subjected to a pressure fill operation wherein fluid is directed into an aerosol type container and the valve body is joined to a resilient dip tube having inner and outer walls and said valve body is adapted to receive a valve stem and biasing means for actuating the valve assembly, said valve body being further adapted to be expandable in the course of a pressure fill Operation to allow expansion of said valve body during a pressure fill operation; said valve body comprising: a cup portion; a resilient tubular shaped section depending from said cup portion; said section having an outer wall; said dip tube being connected in a substantially leak free connection to said section with a portion of said inner wall of said dip tube being positioned over said outer wall surface of said section; said section having at least one metering orifice for regulating the flow of fluid through said assembly and into said dip tube; said section having expansion means, responsive to pressure, for allowing the expansion of the size of said section to provide an increased fluid entry means during a pressure fill operation; said expansion means comprises at least one slit in said body which is free of intersecting said orifice; and, said section and said resilient dip tube portion being adapted to expand together when, during a pressure fill operation, fluid flows through said section and resilient dip tube, and adapted to contract together to their normal position subsequent to a pressure fill operation.