Realex Corporation

Phil L Nelson

Donald D Foster

David G Moore

Robert N Hills

An economical, non-clogging apparatus for dispensing premeasured amounts of liquid from a container placed on a shelf is provided which contains no spring, has a secure shipping mode, permits one-handed operation, has few moving parts, and avoids liquid wastage by preventing inadvertent removal of the rotatable outer cap. In preferred forms, the apparatus includes a tubular, stationary member received partly within the container's outlet neck a tubular, movable member coupled with and received partly within the stationary member, and a stem co-axially received within the movable member and coupled with the stationary member. These components cooperatively define a measuring chamber, an inlet opening, and an outlet aperture. Counterclockwise rotation of the movable member causes the stem to move from its shipping position and open the inlet opening, thereby filling the chamber with liquid while maintaining the outlet in a closed position; clockwise rotation of the movable member causes the inlet to close and the outlet aperture to open, thereby dispensing the premeasured liquid. The apparatus hereof can be used on a wide variety of containers and liquids such as bottles of household liquid detergent or large containers of industrial chemicals.

Unit dose liquid dispenser having precise dosage capabilities

The atmospheric pressure-operated take-up piston of the dispenser is provided with releasable locking structure which retains the piston prior to first intentional actuation of the dispenser against jarring movements tending to pressurize the contents and promote leakage during shipment and storage. Once the piston has been intentionally unlocked from its starting position at one end of the dispenser, it is free to travel under the influence of atmospheric pressure to take up space left vacant by discharged product. Several different forms of structure means for the take-up piston are disclosed.

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Kansas City, MO, United States of America

Phil L Nelson