Medical liquid infusion apparatus
First Claim
1. A medical liquid infusion apparatus provided with a driving portion and configured to infuse a medical liquid inside a medical liquid container into a patient by applying a pressure to the medical liquid container using a driving force of the driving portion, wherein:
- the driving portion includes a compressed gas cylinder filled with a compressed gas alone, and the driving force is generated by a pressure inside the compressed gas cylinder, the compressed gas cylinder including an on-off valve configured to close the compressed gas cylinder using a pressure of the compressed gas, when no external force is conferred thereto,wherein the driving portion further includes;
a main body portion allowed to communicate with an interior of the compressed gas cylinder by opening the on-off valve;
a diaphragm valve that defines a compression chamber capable of sealing the compressed gas flown from the compressed gas cylinder in a space between the main body portion and the medical liquid container;
a pushing member that pushes the diaphragm valve toward the compression chamber from an outside open to atmosphere; and
a link member that allows the on-off valve and the diaphragm valve to operate in synchronization with each other in such a manner that a first resultant force obtained by adding a force to close the on-off valve and a force to expand the diaphragm valve outward using the pressure inside the compression chamber is balanced out with a second resultant force to push the diaphragm valve toward the compression chamber using an atmospheric pressure and a pushing force of the pushing member, andwherein the pressure inside the compression chamber is used as the driving force.
1 Assignment
0 Petitions
Accused Products
Abstract
An object is to provide a medical liquid infusion apparatus suitable for a portable use and capable of suppressing an abrupt change in flow rate even when the environmental temperature rises. A medical liquid infusion apparatus 1 is provided with a driving portion 2 and configured to infuse a medical liquid inside a medical liquid container 3 to a patient by applying a pressure to the medical liquid container 3 using a driving force of the driving portion. The driving portion 2 includes a compressed gas cylinder 4 filled with a compressed gas, and it is configured in such a manner that the driving force is generated by the pressure inside the compressed gas cylinder 4.
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Citations
6 Claims
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1. A medical liquid infusion apparatus provided with a driving portion and configured to infuse a medical liquid inside a medical liquid container into a patient by applying a pressure to the medical liquid container using a driving force of the driving portion, wherein:
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the driving portion includes a compressed gas cylinder filled with a compressed gas alone, and the driving force is generated by a pressure inside the compressed gas cylinder, the compressed gas cylinder including an on-off valve configured to close the compressed gas cylinder using a pressure of the compressed gas, when no external force is conferred thereto, wherein the driving portion further includes; a main body portion allowed to communicate with an interior of the compressed gas cylinder by opening the on-off valve; a diaphragm valve that defines a compression chamber capable of sealing the compressed gas flown from the compressed gas cylinder in a space between the main body portion and the medical liquid container; a pushing member that pushes the diaphragm valve toward the compression chamber from an outside open to atmosphere; and a link member that allows the on-off valve and the diaphragm valve to operate in synchronization with each other in such a manner that a first resultant force obtained by adding a force to close the on-off valve and a force to expand the diaphragm valve outward using the pressure inside the compression chamber is balanced out with a second resultant force to push the diaphragm valve toward the compression chamber using an atmospheric pressure and a pushing force of the pushing member, and wherein the pressure inside the compression chamber is used as the driving force. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification