Dispensing – With discharge assistant – Container with follower
Patent
1980-10-31
1983-12-20
Tollberg, Stanley H.
Dispensing
With discharge assistant
Container with follower
222391, B67D 542
Patent
active
044212550
ABSTRACT:
A dispenser for pasty products has a cylindrical body with an open bottom and an outlet in its top. A piston that closes the bottom of the body, cooperating with it to define a chamber, is slidable upward in the body for expelling contents of the chamber out of the outlet. An actuator on the exterior of the body, movable in opposite directions, is manually movable to one limit of its motion and biased to the other limit. A rod connected with the actuator and movable lengthwise up and down in the body has a unidirectional driving connection with the piston that constrains the piston to move upward with it but allows it to move down relative to the piston. A check valve associated with the outlet opens to allow discharge of chamber contents but closes to block flow into the chamber, thus enabling atmospheric pressure to hold the piston against downward motion. Several advantageous unidirectional connections are disclosed.
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patent: 2356874 (1944-08-01), Nageotte
patent: 2507248 (1950-05-01), Swart
patent: 2604858 (1952-07-01), Bosa
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patent: 2784603 (1957-03-01), Collins
patent: 3215320 (1965-11-01), Heisler
patent: 3255935 (1966-06-01), Spatz
patent: 4154371 (1979-05-01), Kolaczinski et al.
Nilles James E.
Tollberg Stanley H.
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