Chemically driven liquid delivery pumping device

Dispensing – Resilient wall – Supply container delivering to receiving chamber

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Details

222214, 222389, 222397, 222399, 604145, 604147, B65D 8314

Patent

active

058711252

ABSTRACT:
A liquid delivery pumping device for the delivery of liquids enterally or parenterally comprises a housing including a gas generating chamber, wherein a gas is generated intermittently when two reactants, such as the components of an effervescent couple, are caused to react, a pumping chamber for a reciprocating pumping unit operable by the gas and to which chamber the gas is conveyed once generated, the pumping unit forming part of a mechanism which receives and regulates the liquid to be delivered in response to the reciprocation of the pumping unit, and means for controlling the gas pressure within the pumping chamber to enable controlled reciprocation of the pumping unit. The device provides precisely controlled rates of liquid delivery to a patient irrespective of the viscosity of the liquid to be delivered.

REFERENCES:
patent: 3235135 (1966-02-01), Robert et al.
patent: 4140117 (1979-02-01), Buckles et al.
patent: 4886499 (1989-12-01), Cirelli et al.
patent: 5090963 (1992-02-01), Gross et al.
patent: 5163909 (1992-11-01), Stewart
patent: 5398850 (1995-03-01), Sancoff et al.
patent: 5398851 (1995-03-01), Sancoff et al.

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