Intravenous pump chamber
First Claim
1. An intravenous pump chamber for pumping intravenous liquids including blood by means of an intravenous pump having driver means and mechanization to move the driver means in an up and down manner, said pump chamber comprising:
- a chamber defined by a housing member presenting a cavity portion;
inlet and outlet passage means in fluid communication with said cavity;
one way valve means operatively associated with said inlet passage means;
a diaphragm means positioned over said cavity and spaced from said outlet passage means;
a plunger member operatively positioned and guided to contact said diaphragm member at one end and said driver means at the other;
said outlet passage means defined by a valve seat;
an outlet valve member, said outlet valve member presenting a downwardly and outwardly extending lateral wall surface constructed and arranged to direct said liquid downwardly and away from said biasing means in a uniform manner as said liquid passes through said outlet passage means; and
biasing means operatively associated with said valve member to bias said valve member against said valve seat in an axial manner.
2 Assignments
0 Petitions
Accused Products
Abstract
A disposable intravenous pump chamber cassette for an intravenous administration set which is specifically fabricated for use with the administration of blood. The pump chamber is specifically constructed to be utilized in conjunction with an intravenous pump having a driver to activate a diaphragm member and includes an improved outlet valve member having an outwardly extending lateral wall surface to direct the blood away from the biasing mechanism for the outlet valve member to thereby substantially reduce hemolysis.
122 Citations
10 Claims
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1. An intravenous pump chamber for pumping intravenous liquids including blood by means of an intravenous pump having driver means and mechanization to move the driver means in an up and down manner, said pump chamber comprising:
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a chamber defined by a housing member presenting a cavity portion; inlet and outlet passage means in fluid communication with said cavity; one way valve means operatively associated with said inlet passage means; a diaphragm means positioned over said cavity and spaced from said outlet passage means; a plunger member operatively positioned and guided to contact said diaphragm member at one end and said driver means at the other; said outlet passage means defined by a valve seat; an outlet valve member, said outlet valve member presenting a downwardly and outwardly extending lateral wall surface constructed and arranged to direct said liquid downwardly and away from said biasing means in a uniform manner as said liquid passes through said outlet passage means; and biasing means operatively associated with said valve member to bias said valve member against said valve seat in an axial manner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification