US 7,063,235 B2 · Metering pump dispenser

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.

Claims16

Dependent claims

A metering pump made of plastic for the metered dispensing of liquid, gel and/or pasty media, the metering pump comprising:

a bottle container, can-container or tube-container;
a dimensionally stable lower housing part;
a dimensionally stable upper housing part telescopically movable in relation to said lower housing part, said upper housing part having a discharge opening and a ring wall having a displacement piston;
an elastic bellows arranged between said lower housing part and said upper housing part said bellows defining a pump chamber and including an upper ring collar;
a discharge channel and a discharge valve, said discharge opening being connected to said pump chamber via said discharge channel and said discharge valve, said upper ring collar of said elastic bellows sealingly surrounding said ring wall of said upper housing part with said displacement piston protruding into said bellows, said displacement piston being closed at a lower end and being provided in an upper end area of said pump chamber with at least one passage opening connecting said pump chamber with said discharge valve;
a suction valve;
a follower piston in said container, wherein said elastic bellows is connected to said container via said suction valve.

4 more elements

A metering pump made of plastic, the metering pump comprising:

a container;
a suction valve in communication with an inside of said container;
an elastic bellows defining a pump chamber, said pump chamber having a first end in communication with said suction valve and a second end diametrically opposite said first end, said bellows being movable between a compressed position and an expanded position;
a displacement piston arranged at said second end of said pump chamber, said piston having a first end and a diametrically opposite second end, said first end being closer to said first end of said pump chamber than said second end of said piston, said first end being closed, said piston defining a passage opening at said second end of said pump chamber, said passage opening being in communication with said pump chamber;
a discharge valve in communication with said passage opening;
a discharge channel in communication with said discharge valve;
an actuating body connected to said bellows for moving said bellows between said compressed and expanded position.

4 more elements

Dependencies are inferred from the claim text.

Metering pump dispenser

Life of this patent

Metering pump dispenser

Life of this patent

Abstract

Claims16