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US 5,842,605 AGranted
Resuable dispenser for paste, lotion and cream-like materials
OwnerRobert A. Lehmkuhlinventor
Life of this patent
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OwnerRobert A. Lehmkuhlinventor
Estimating the term…
A dispenser for use with a container of lotion or paste-like product to be dispensed. The dispenser comprises a body having an inlet port connectable to the container and a dispensing spout with a closure cap. The dispenser has a plunger assembly manually shiftable between an unactuated position and an actuated position and a piston shiftable by the plunger assembly between an unactuated position and an actuated position. Both the plunger assembly and the piston are biased toward their unactuated position. As the plunger assembly and piston are shifted toward their actuated positions, the spout cap is opened and the piston causes product to be dispensed through the spout. When the plunger assembly is released and it and the piston return to their unactuated positions, a suck back vacuum withdraws product back into said spout, a vacuum created by the piston draws product from the container into the dispenser and the spout is closed by the cap. The dispenser can be used with a collapsible container or a rigid, uncollapsible container vented by a port provided in the dispenser.
A dispenser for use with a separate container of product to be dispensed, said dispenser comprising a body having an inlet port releasably connectable to said container, a dispensing spout, a closing and sealing cap for said spout, an operating plunger shiftable between a normal unactuated position and an actuated position, means biasing said plunger to its unactuated position, means actuable by said plunger to delay product flow as said plunger is shifted toward its actuated position for first opening said spout, means actuable by said plunger as said plunger continues the rest of the way to its actuated position to dispense product from said spout, means initiating a positive controlled amount of suck back of product into said spout upon release and shifting of said plunger from said actuated position to said unactuated position and means for closing said spout with said cap.
A dispenser for use with a container of product to be dispensed, said dispenser comprising a body having an inlet port at its lower end connectable to an opening in said container and an open upper end, a piston shiftable within said body between a normal retracted position and an actuated depressed position, said piston being spring biased to said normal position, a pressure chamber within said body between said inlet port and said piston, means to prevent the passage of product from said pressure chamber to said container, said piston comprising a head and a stem and an axial bore therethrough, an outlet valve, said piston having a seat for said outlet valve, said outlet valve having an open position and a normal closed position wherein it closes said piston bore, said dispenser having a spout, said piston bore being operatively connected to said spout, a plunger assembly for shifting said piston from said normal retracted position to said depressed actuated position against the action of said spring biasing means, means to open said outlet valve, whereby product from said pressure chamber will pass through said bore of said piston to said spout as said piston moves toward said actuated position, means as said piston returns from said actuated position to said normal position to close said outlet valve, means to create a suck-back vacuum for product in said spout and means to create a vacuum to draw product from said container into said pressure chamber and a closing and sealing cap for said spout.
A collapsible container with a removable cap for use with a dispenser of the type which withdraws product from said container by vacuum, said container comprising first and second portions, said first portion constituting one of a rigid portion and a semi-rigid portion, said first portion having a smooth interior surface, said first portion having an outlet opening closable by said cap and attachable to said dispenser, said second portion being collapsible and being secured to said first portion, said first portion having an external anti-collapsing ring adjacent the juncture of said first and second portions, whereby when product is withdrawn from said container by vacuum, said first portion will not collapse under atmospheric pressure, and said second portion will act as a rolling diaphragm and collapse under the influence of atmospheric pressure into said first portion with substantially no product left therebetween.
Dependencies are inferred from the claim text.