Patent ID: 7896202

Claim:
A disposable pump for integration with a collapsible reservoir, comprising: a) a hollow pump body comprising: a first end connecting to the reservoir, a second end for dispensing liquid, a seal-base having a seal-base opening, located inside the pump body and dividing the pump body into a first section adjacent the first end and a second section adjacent the second end; a first flexible section formed in the first section; and a second flexible section formed in the second section; the seal-base being movable from a first position nearer the first end of the pump body to a second position nearer the second end of the pump body, wherein when the seal base is in the first position, the first flexible section is compressed, the first section is reduced in volume, the second flexible section is expanded and the second chamber is increased in volume, and when the seal base is in the second position, the second flexible section is compressed, the second section is reduced in volume, the first flexible section is expanded and the first chamber is increased in volume; b) a nozzle at the second end of the pump body; c) a top-cap at the first end of the pump body; d) a rigid seal-rod extending axially along the pump body from the top cap to the nozzle through the opening in the seal-base, having a seal-head sealing the opening in the seal-base by sealing against a side of the seal-base when the seal-base is in one of the first position or the second position, blocking flow of liquid through the opening in the seal-base; e) a compression spring, biasing the seal-base into one of the first position or the second position in which the seal-head seals the opening in the seal-base; such that when the seal-base is reciprocally moved parallel to an axis of the pump body, the seal-base is moved between the first position and the second position.