Dispensing – Plural sources – compartment – containers and/or spaced jacket – With discharge assistant for each source
Reexamination Certificate
2006-06-20
2006-06-20
Mar, Michael (Department: 3754)
Dispensing
Plural sources, compartment, containers and/or spaced jacket
With discharge assistant for each source
C222S145100
Reexamination Certificate
active
07063235
ABSTRACT:
A metering pump made of plastic for the metered dispensing of liquid and/or pasty media from a bottle-like container, can-like container or tube-like container with a follower piston. A pump chamber delivering the medium is connected via a suction valve with the container and has as the pumping member an elastic bellows that forms the pump chamber and is arranged between a dimensionally stable lower housing part and a likewise dimensionally stable upper housing part that is telescopically movable in relation thereto. The upper housing part has the discharge opening, which is connected via a discharge channel and a discharge valve with the pump chamber. The bellows has an upper ring collar sealingly surrounding a ring wall of the upper housing part. The ring wall is provided with a displacement piston that has a smaller diameter and protrudes into the bellows. To make it possible to accurately meter the quantities of the medium to be pumped that are to be metered, provisions are made for the displacement piston to be closed at its lower end and to be provided in the upper end area of the pump chamber with at least one passage opening, which connects the pump chamber with the discharge valve.
REFERENCES:
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patent: 6341717 (2002-01-01), Auer
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patent: 101 10 888 (2001-10-01), None
Cartagena Melvin A
Mar Michael
McGlew & Tuttle P.C.
MegaPlast GmbH & Co. KG
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