Dispensing device

Claim 1

A dispensing device for selectively dispensing a semi-liquid product comprising in combination: a receptacle having a tubular inner body portion with circumferentially spaced longitudinally extending slots therethrough, an outer concentric body portion spaced outwardly from an upper portion of the inner body and affixed thereto, and a top section affixed to said outer body; advancement means concentric with and rotatably disposed for independent rotative movement between said inner body portion said outer body portion, said advancement means having a threaded inner surface; a bottom plate secured to said receptacle; a carriage disposed within said inner body portion for axial movement therethrough and having outwardly extending protrusions adapted to pass through said longitudinally extending slots in the inner body portion and be received in the threaded inner surface of said advancement means whereby upon rotative movement of the advancement means the carriage will be caused to move axially through the inner body portion; a replaceable container for the semi-liquid product disposed within the inner body portion on one side of said carriage, said container having an opening in one end and flexible sides whereby it will collapse within the inner body when compressive force is applied thereto by the carriage; a cap for the receptacle affixed to the top section of the receptacle, said cap having an open ended elongated hollow neck passing therethrough in fluid communication with the opening in said container; and a pressure sensitive nozzle assembly mounted on said neck to selectively open and close the open end of the neck including a slide member disposed for sliding movement between open and closed positions, a closed end on the slide member adapted to close the open end of the hollow neck when the slide member is in its closed position, a discharge orifice in the slide member adjacent the closed end thereof adapted to establish fluid communication between the hollow portion of the neck and the ambient environment when the slide member is in its open position, and resilient means interposed between the slide member and the cap for biasing the slide member into its normally closed position said resilient means being overcome by the fluid pressure within the container when compressive force is applied to the container to allow the slide member to move to its open position, and said resilient means urging said slide member to its closed position when a positive compressive force is not being applied to the container.