Piston pump actuated diaphragm pump for spraying liquids

A piston pump actuated diaphragm pump for spraying liquids comprising, a container containing fluid to be dispensed, a closure mounted on said container, a neck portion provided on said closure, a diaphragm-pump spray nozzle assembly mounted within said closure neck portion and communicating with the fluid in the container to be dispensed, said diaphragm-pump spray nozzle assembly including a cylindrical housing having side and top walls, the upper surface of the top wall of said housing being concave, a diaphragm secured to the upper surface of the top wall to thereby form a chamber between the lower surface of the diaphragm and the concave surface of the housing top wall;

• and a motor actuated piston pump assembly detachably connected to said closure neck portion and separate from said diaphragm pump spray nozzle assembly, said piston pump assembly including a housing having a bottom wall, an annular recess formed in the bottom wall of said piston pump housing for receiving the neck portion of said closure, a bore provided in said bottom wall of said piston pump housing concentric with respect to said annular recess, a piston slidably mounted in said bore, the portion of the bottom wall of said piston pump housing within the neck portion of the closure being superimposed on said diaphragm, whereby upon actuation of the piston pump assembly the diaphragm-pump spray nozzle assembly dispenses fluid from the container while preventing the piston pump assembly from becoming contaminated by the fluid being dispensed;
• the motor actuated piston pump assembly being detachably connectable to other containers having similarly mounted diaphragm-pump spray nozzle assemblies, whereby various types of fluids, such as paint, air freshener, water, hair spray and the like can be successively dispensed.