Valving system for infusion cassette
First Claim
1. An infusion pump system comprising:
- a cassette recess comprising at least one valve actuator configured to extend through a surface of the cassette recess to operate a valve in a fluid passageway of a cassette mounted in the cassette recess, wherein the at least one valve actuator comprises;
a base portion;
a shaft extending from the base portion through the surface;
a spring disposed on the shaft and extending along a portion of the shaft, wherein the spring is disposed interior to the surface; and
a rotatable member disposed on the base portion; and
a cam structure configured to periodically bear against the rotatable member of the at least one valve actuator to actuate the at least one valve actuator in a direction substantially parallel to the shaft, wherein the cam structure comprises a rotating cam having a protrusion or eccentricity that is configured to slide against the rotatable member to cause linear movement of the at least one valve actuator in the direction substantially parallel to the shaft.
1 Assignment
0 Petitions
Accused Products
Abstract
Pump cassettes, infusion systems, and methods are described. An example infusion pump system may include a cassette recess with one or more valve actuators that extend through a surface of the cassette recess to operate a corresponding valve in a fluid passageway of a pump cassette mounted in the cassette recess. The valve actuator may include a base portion, a shaft extending from the base portion through the surface, and a spring disposed on the shaft and extending along a portion of the shaft. The spring may be disposed interior to the back surface. The system may include first and second valve actuators configured to operate corresponding first and second valves located on opposing sides of a pump chamber of the fluid passageway. A piston may be configured to cooperate with the first and second valve actuators to pump a fluid through the fluid passageway.
39 Citations
19 Claims
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1. An infusion pump system comprising:
- a cassette recess comprising at least one valve actuator configured to extend through a surface of the cassette recess to operate a valve in a fluid passageway of a cassette mounted in the cassette recess, wherein the at least one valve actuator comprises;
a base portion;
a shaft extending from the base portion through the surface;
a spring disposed on the shaft and extending along a portion of the shaft, wherein the spring is disposed interior to the surface; and
a rotatable member disposed on the base portion; and
a cam structure configured to periodically bear against the rotatable member of the at least one valve actuator to actuate the at least one valve actuator in a direction substantially parallel to the shaft, wherein the cam structure comprises a rotating cam having a protrusion or eccentricity that is configured to slide against the rotatable member to cause linear movement of the at least one valve actuator in the direction substantially parallel to the shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a cassette recess comprising at least one valve actuator configured to extend through a surface of the cassette recess to operate a valve in a fluid passageway of a cassette mounted in the cassette recess, wherein the at least one valve actuator comprises;
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10. A system for actuating a valve, the system comprising:
- a base portion;
a shaft extending from the base portion and configured to extend through a surface of a cassette recess of an infusion pump system to operate a valve in a fluid passageway of a cassette mounted in the cassette recess;
a spring disposed on the shaft and extending along a portion of the shaft, wherein the spring is configured to be disposed interior to the surface;
a rotatable member disposed on the base portion; and
a cam structure configured to periodically bear against the rotatable member to cause movement of the shaft in a direction substantially parallel to the shaft, wherein the cam structure comprises a rotating cam having a protrusion or eccentricity that is configured to slide against the rotatable member to cause linear movement of the shaft in the direction substantially parallel to the shaft. - View Dependent Claims (11, 12, 13, 14)
- a base portion;
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15. A method of operating an infusion pump system, comprising:
- providing a pump cassette in a cassette recess of the infusion pump system; and
operating a valve of a controllable fluid passageway in the pump cassette by actuating a valve actuator that extends through a back surface of the cassette recess to contact a membrane of the pump cassette, wherein the valve actuator comprises;
a base portion;
a shaft extending from the base portion through the back surface;
a spring disposed on the shaft and extending along a portion of the shaft, wherein the spring is disposed interior to the back surface; and
a rotatable member disposed on the base portion, wherein operating the valve comprises periodically bearing against the rotatable member of the valve actuator with a cam structure to actuate the valve actuator in a direction substantially parallel to the shaft, wherein periodically bearing against the rotatable member comprises sliding against the rotatable member with a protrusion or eccentricity of a rotating cam of the cam structure to cause linear movement of the valve actuator in the direction substantially parallel to the shaft. - View Dependent Claims (16, 17, 18, 19)
- providing a pump cassette in a cassette recess of the infusion pump system; and
Specification