Pump-type dispensing apparatus

Claim 1

A dispensing apparatus comprising a squeezeable container having an integral bottom provided with a normally closed check valve integrally formed therewith adapted to open when the pressure in said container is less than atmospheric, an inflatable bag in said container, a cover threadedly detachably secured to said container, said bag having an open end provided with a ring, said ring being clampingly engaged between said cover and said container when said cover is threadedly engaged on said container, said cover having a dispensing opening therein defining a valve seat, a valve member disposed in said opening and having a valve head engaging said valve seat for closing the opening, and spring means interconnecting said valve head and said cover for urging said valve head into engagement with said valve seat, said valve member further including a downwardly extending valvE stem, said spring means including helical spring members integral with said cover and said valve stem, said bag having a closed end adjacent said check valve so that squeezing of said container will collapse said bag to force fluid material in said bag through said dispensing opening.