Intravenous pump chamber assembly

Claim 2

An intravenous pump chamber assembly for an intravenous pump comprising: a base member defining a central cavity portion; a diaphragm member positioned over said cavity portion; a retaining member defining a central opening to accommodate a plunger member, said base member and retaining member constructed and arranged to accommodate said diaphragm therebetween in a sealing relationship; inlet and outlet ports defining inlet and outlet passages extending through said base member and in fluid communication with said central cavity portion, said inlet and outlet ports being positioned within the confines of said cavity portion to communicate with said central cavity portion and spaced from each other with said outlet port positioned adjacent the periphery of said cavity, said base member presenting a wall defining an air bubble deterring surface between said inlet and outlet ports; tubing receiving means defined by said inlet and outlet ports; and inlet and outlet flexible I.V. tubing in fluid-tight communication with said respective inlet and outlet ports.

Claim 3

The intravenous pump chamber assembly as defined in claim 1 wherein said inlet port is positioned diametrically opposite from said outlet port.

Claim 4

The intravenous pump chamber assembly as defined in claim 2 wherein said pump chamber includes a combined orientation and activation means for orientating said base member in a pumping member and activating a reset mechanism in said pumping member.

Claim 5

The intravenous pump chamber assembly as defined in claim 3 wherein said orientation and activating means is defined by a projecting member extending from said pump chamber, said projecting member positioned adjacent said outlet port and extending in a direction outwardly therefrom.

Claim 6

The intravenous pump chamber assembly as defined in claim 4 wherein said retaining member includes a passage to accommodate a portion of said projecting member.

Claim 7

The intravenous pump chamber assembly as defined in claim 1 wherein said retaining member further includes finger avoidance means operatively positioned adjacent said central opening.

Claim 8

The intravenous pump chamber assembly as defined in claim 6 wherein said finger avoidance means is defined by a saw-tooth surface.

Claim 9

The intravenous pump chamber assembly as defined in claim 1 wherein said diaphragm member comprises a substantially flat disc and is held in part between said base and retaining members by means of frictional engaging means.

Claim 10

The intravenous pump chamber assembly as defined in claim 1 wherein said bubble deterring surface is defined by a matting surface.

Claim 11

An intravenous pump of the diaphragm-type comprising: a mounting member; first and second contact members; a plunger member operatively positioned between said first and second contact members; means constructed and arranged to move said first and second contact members and said plunger member through said mounting member in a reciprocal manner; a base member including a wall portion defining a central cavity portion;

Claim 12

An intravenous pump of the diaphragm-type comprising: a mounting member; first and second contact members; a plunger member operatively positioned between said first and second contact members; means constructed and arranged to move said first and second contact members and said plunger member through said mounting member in a reciprocal manner; a base member including a wall portion defining a central cavity portion;

Claim 13

a diaphragm member positioned over said cavity portion; a retaining member defining a central opening to accommodate said plunger member; said base member and retaining member constructed and arranged to accommodate said diaphragm therebetween in a sealing relationship, said base, diaphragm and retaining members comprising a pump chamber cassette; inlet and outlet ports defining inlet and outlet passages extending through said base member and in fluid communication with said central cavity portion; said inlet and outlet ports being positioned within the confines of said cavity portion to communicate with said central cavity portion and spaced from each other with said outlet port positioned adjacent the periphery of said cavity and at the top of said cassette, said base member presenting an air bubble deterring surface between said inlet and outlet ports; tubing receiving means defined by said inlet and outlet ports; inlet and outlet flexible I.V. tubing in fluid-tight communication with said respective inlet and outlet ports; a compartment defined by said mounting member and positioned coaxially with the line of travel of said plunger member, said compartment having substantially the same geometrical configuration as said base member to accommodate a portion of said base member therein, said mounting member constructed and arranged to position said pump chamber cassette in said compartment at an angle in the range of about 5° to 10° from the vertical; tubing holding means operatively associated with said mounting member to position said tubing for contact with said first and second contact members; and a closure member operatively associated with said mounting member presenting anvil surfaces for said contact members and said plunger member.

Claim 14

a diaphragm member positioned over said cavity portion; a retaining member defining a central opening to accommodate said plunger member; said base member and retaining member constructed and arranged to accommodate said diaphragm therebetween in a sealing relationship, said base, diaphragm and retaining members comprising a pump chamber cassette; inlet and outlet ports defining inlet and outlet passages extending through said base member and in fluid communication with said central cavity portion; said inlet and outlet ports being positioned within the confines of said cavity portion to communicate with said central cavity portion and spaced from each other with said outlet port positioned adjacent the periphery of said cavity and at the top of said cassette, said base member presenting an air bubble deterring surface between said inlet and outlet ports; tubing receiving means defined by said inlet and outlet ports; inlet and outlet flexible I.V. tubing in fluid-tight communication with said respective inlet and outlet ports; a compartment defined by said mounting member and positioned coaxially with the line of travel of said plunger member, said compartment having substantially the same geometrical configuration as said base member to accommodate a portion of said base member therein, said mounting member constructed and arranged to position said pump chamber cassette in said compartment at an angle in the range of about 5° to 10° from the vertical; tubing holding means operatively associated with said mounting member to position said tubing for contact with said first and second contact members; and a closure member operatively associated with said mounting member presenting anvil surfaces for said contact members and said plunger member.

Claim 15

The intravenous pump as defined in claim 10 wherein said closure member is a door member.

Claim 16

The intravenous pump as defined in claim 11 wherein base member is held in said compartment at an angle of 7°.

Claim 17

The intravenous pump as defined in claim 10 further including a switch member positioned adjacent said compartment for contact with a portion of said pump chamber cassette when said cassette is placed in said compartment and will be held in contact with said switch member by means of said closure member.

Claim 18

The intravenous pump as defined in claim 10 wherein said inlet port is positioned diametrically opposite from said outlet port and said tubing holding means is arranged to position said inlet tubing at the top of said mounting member and said outlet tubing at the bottom thereof with said inlet port positioned below said outlet port.

Claim 19

The intravenous pump as defined in claim 14 wherein said retaining member further includes finger avoidance means operatively positioned adjacent said central opening.

Claim 20

The intravenous pump as defined in claim 10 wherein said pump chamber includes a combined orientation and actuation means for orientating said base member in said compartment of said mounting member.

Claim 21

The intravenous pump as defined in claim 16 wherein said actuation means is defined by a projecting member extending from said pump chamber cassette, said projecting member positioned adjacent said outlet port and extending in a direction outwardly therefrom.

Claim 22

The intravenous pump as defined in claim 17 wherein said diaphragm member comprises a substantially flat disc and is held in part between said base and retaining members by means of frictional engaging means.