초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [1.] A liquid delivery device comprising a housing, a pumping chamber within the housing, gas generating means comprising reactants which when brought into contact generate a gas which pressurizes said pumping chamber, a pumping mechanism having a pumping member within the pum

[ What is claimed is:] [1.] A liquid delivery device comprising a housing, a pumping chamber within the housing, gas generating means comprising reactants which when brought into contact generate a gas which pressurizes said pumping chamber, a pumping mechanism having a pumping member within the pumping chamber, said member being reciprocable in response to changes in pumping chamber pressure, wherein the reciprocation of the pumping member causes a liquid to be drawn from a liquid supply and pumped towards an outlet, and means for controlling the pressure within the pumping chamber to enable controlled reciprocation of the pumping member.