Patent ID: 7063235

Claim:
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.