초록 ▼

A reciprocating type of finger pump for use on top of a product container. This combines a tubular housing, including a laterally directed spray nozzle, mounted coaxially in the sleeve of an accumulator cap including a central valve. The valve opening leads to a dip tube which passes into a liquid r

A reciprocating type of finger pump for use on top of a product container. This combines a tubular housing, including a laterally directed spray nozzle, mounted coaxially in the sleeve of an accumulator cap including a central valve. The valve opening leads to a dip tube which passes into a liquid reservoir in the container. The tubular housing, including the spray nozzle, is depressed manually so that it moves telescopically in the accumulator sleeve, driving a hollow piston against the tension of a spring. The first compression stroke serves to prime the pump, forcing a piston to close the valve to the dip tube. Simultaneously, air in an annular chamber of the housing surrounding the hollow piston is compressed. On the reverse or suction stroke, the valve to the dip tube is opened, creating a vacuum which causes the liquid to be sucked up from the reservoir and into the hollow piston. On the second or subsequent compression strokes, the compressed air and liquid are forced through normally closed pressure responsive seals into the inner mixing chamber, where the compressed air breaks up and atomizes the liquid, causing the atomized spray to move at high pressure through the spray nozzle. Simultaneously, the valve to the dip tube closes, air is drawn into and compressed in the outer annular chamber, and the cycle is ready to be repeated in response to the successive release and reapplication of pressure on the tubular housing. Means is provided in response to rotation of the cylindrical housing relative to the accumulator sleeve for locking the pump against compression for shipping or safety purposes.

대표청구항 ▼

A pressure actuated dispenser including a spray nozzle constructed in combination with the closure of a container of a reservoir of fluid product for dispensing said product in a carrier gas in the form of high pressure spray, said dispenser comprising in combination: means including fixed and movab

A pressure actuated dispenser including a spray nozzle constructed in combination with the closure of a container of a reservoir of fluid product for dispensing said product in a carrier gas in the form of high pressure spray, said dispenser comprising in combination: means including fixed and movable elements forming an annular variable volume carrier gas chamber constructed for compression and expansion in response to pressure and release from pressure on said dispenser; a pump for said fluid product, said pump including a pump chamber and a hollow stem piston mechanically coupled for reciprocating action in synchronism with said movable elements of said variable volume chamber; central valve means communicating between said product reservoir and said pump chamber; means for maintaining said reservoir at substantially ambient pressure; means for forming a mixing chamber surrounded by said annular gas chamber, said mixing chamber having an aperture communicating with said spray nozzle, and comprising a first inlet means including a normally closed flexible member of membraneous material for admitting said compressed carrier gas from said variable volume carrier gas chamber to said mixing chamber, and a second inlet means including a normally closed flexible member of membraneous material for admitting fluid product under pressure from said hollow stem piston to said mixing chamber; a first means responsive to an initial compression stroke on said dispenser for simultaneously depressing said hollow stem piston to close said central valve means, compressing the carrier gas in said variable volume carrier gas chamber and deflecting the normally closed flexible member of said first inlet means to admit a blast of said compressed carrier gas into said central mixing chamber; a second means responsive to a subsequent return stroke of said hollow piston stem upon release of pressure on said dispenser, to release said central valve means and to draw said fluid product into said pump chamber; and said first means responsive to the subsequent compression strokes of said dispenser for simultaneously again depressing said hollow stem piston to close said central valve means while pumping said fluid product from said pump chamber up through said hollow stem piston again compressing the carrier gas in said variable volume carrier gas chamber, deflecting the flexible member of said first inlet means to admit a blast of said compressed carrier gas through said first inlet means and deflecting the flexible member of said second inlet means to admit said product through said second inlet means to admit said product through said second inlet means to mix in said mixing chamber to form an atomized spray of said product which is propelled out through said spray nozzle.