Diaphragm pumps and pumping systems
First Claim
Patent Images
1. A medical fluid pumping apparatus comprising:
- a first rigid plastic member defining first, second, and third cavities, and first, second and third motive fluid passageways in fluid communication with the first, second, and third cavities, respectively, the first, second and third motive fluid passageways extending through the first rigid plastic member to a like surface of the member, and wherein the passageways are configured to mate with respective motive fluid connections on a mating surface of a pump control assembly via the like surface;
a second rigid plastic member defining a first cavity, the second rigid plastic member being permanently fixed to the first rigid plastic member such that the first cavity of the second rigid plastic member is aligned with the first cavity of the first rigid plastic member, and such that the first and second rigid plastic members permanently fixed together are collectively mountable to and removable from the mating surface of the pump control assembly;
a first preshaped diaphragm region disposed between the first and second rigid plastic members, the first preshaped diaphragm region cooperating with the first cavity of the first rigid plastic member to at least partially define a motive fluid portion of a pumping chamber, the first preshaped diaphragm region cooperating with the first cavity of the second rigid plastic member to at least partially define a medical fluid portion of the pumping chamber, the first preshaped diaphragm region separating the motive fluid portion of the pumping chamber from the medical fluid portion of the pumping chamber;
a second preshaped diaphragm region disposed between the first and second rigid plastic members, the second preshaped diaphragm region cooperating with the second cavity of the first rigid plastic member to at least partially define a motive fluid portion of an inlet valve, the second preshaped diaphragm region cooperating with the second rigid plastic member to at least partially define a medical fluid passage of the inlet valve, the second preshaped diaphragm region separating the motive fluid portion of the inlet valve from the medical fluid passage of the inlet valve, the second preshaped diaphragm region being configured to have a convex shape when unstressed and a non-convex shape when pressure is applied to the second preshaped diaphragm region by motive fluid in the motive fluid portion of the inlet valve such that the medical fluid passage of the inlet valve is operated by actuation of the second preshaped diaphragm region using motive fluid in the motive fluid portion of the inlet valve;
a third preshaped diaphragm region disposed between the first and second rigid plastic members, the third preshaped diaphragm region cooperating with the third cavity of the first rigid plastic member to at least partially define a motive fluid portion of an outlet valve, the third preshaped diaphragm region cooperating with the second rigid plastic member to at least partially define a medical fluid passage of the outlet valve, the third preshaped diaphragm region separating the motive fluid portion of the outlet valve from the medical fluid passage of the outlet valve, the third preshaped diaphragm region being configured to have a convex shape when unstressed and a non-convex shape when pressure is applied to the third preshaped diaphragm region by motive fluid in the motive fluid portion of the outlet valve such that the medical fluid passage of the outlet valve is operated by actuation of the third preshaped diaphragm region using motive fluid in the motive fluid portion of the outlet;
wherein the first preshaped diaphragm region is configured to draw medical fluid from a medical fluid source into the medical fluid portion of the pumping chamber and to pump medical fluid out of the medical fluid portion of the pumping chamber when the medical fluid pumping apparatus is connected to the medical fluid source and to one or more motive fluid sources and the first preshaped diaphragm region is actuated by motive fluid, and the second and third preshaped diaphragm regions are configured to respectively control medical fluid flow into and out of the medical fluid portion of the pumping chamber when the medical fluid pumping apparatus is connected to the medical fluid source and to the one or more motive fluid sources and the second and third preshaped diaphragm regions are actuated by motive fluid, and wherein the one or more motive fluid sources includes at least one of a positive pressure motive fluid source dedicated to providing positive pressure to multiple locations of the medical fluid pumping apparatus or a negative pressure motive fluid source dedicated to providing negative pressure to multiple locations of the medical fluid pumping apparatus.
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Abstract
A process fluid pump can include a pump chamber, an inlet valve, and an outlet valve. Diaphragm regions can define at least a portion of each of the pump chamber, the inlet valve, and the outlet valve. The diaphragm regions can each have an actuation region with a surface that is convexly shaped when the formed actuation region is in a natural unstressed first state, and each formed actuation region can be actuated by a motive fluid to transition to a second state in which the surface is non-convexly shaped.
833 Citations
38 Claims
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1. A medical fluid pumping apparatus comprising:
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a first rigid plastic member defining first, second, and third cavities, and first, second and third motive fluid passageways in fluid communication with the first, second, and third cavities, respectively, the first, second and third motive fluid passageways extending through the first rigid plastic member to a like surface of the member, and wherein the passageways are configured to mate with respective motive fluid connections on a mating surface of a pump control assembly via the like surface; a second rigid plastic member defining a first cavity, the second rigid plastic member being permanently fixed to the first rigid plastic member such that the first cavity of the second rigid plastic member is aligned with the first cavity of the first rigid plastic member, and such that the first and second rigid plastic members permanently fixed together are collectively mountable to and removable from the mating surface of the pump control assembly; a first preshaped diaphragm region disposed between the first and second rigid plastic members, the first preshaped diaphragm region cooperating with the first cavity of the first rigid plastic member to at least partially define a motive fluid portion of a pumping chamber, the first preshaped diaphragm region cooperating with the first cavity of the second rigid plastic member to at least partially define a medical fluid portion of the pumping chamber, the first preshaped diaphragm region separating the motive fluid portion of the pumping chamber from the medical fluid portion of the pumping chamber; a second preshaped diaphragm region disposed between the first and second rigid plastic members, the second preshaped diaphragm region cooperating with the second cavity of the first rigid plastic member to at least partially define a motive fluid portion of an inlet valve, the second preshaped diaphragm region cooperating with the second rigid plastic member to at least partially define a medical fluid passage of the inlet valve, the second preshaped diaphragm region separating the motive fluid portion of the inlet valve from the medical fluid passage of the inlet valve, the second preshaped diaphragm region being configured to have a convex shape when unstressed and a non-convex shape when pressure is applied to the second preshaped diaphragm region by motive fluid in the motive fluid portion of the inlet valve such that the medical fluid passage of the inlet valve is operated by actuation of the second preshaped diaphragm region using motive fluid in the motive fluid portion of the inlet valve; a third preshaped diaphragm region disposed between the first and second rigid plastic members, the third preshaped diaphragm region cooperating with the third cavity of the first rigid plastic member to at least partially define a motive fluid portion of an outlet valve, the third preshaped diaphragm region cooperating with the second rigid plastic member to at least partially define a medical fluid passage of the outlet valve, the third preshaped diaphragm region separating the motive fluid portion of the outlet valve from the medical fluid passage of the outlet valve, the third preshaped diaphragm region being configured to have a convex shape when unstressed and a non-convex shape when pressure is applied to the third preshaped diaphragm region by motive fluid in the motive fluid portion of the outlet valve such that the medical fluid passage of the outlet valve is operated by actuation of the third preshaped diaphragm region using motive fluid in the motive fluid portion of the outlet; wherein the first preshaped diaphragm region is configured to draw medical fluid from a medical fluid source into the medical fluid portion of the pumping chamber and to pump medical fluid out of the medical fluid portion of the pumping chamber when the medical fluid pumping apparatus is connected to the medical fluid source and to one or more motive fluid sources and the first preshaped diaphragm region is actuated by motive fluid, and the second and third preshaped diaphragm regions are configured to respectively control medical fluid flow into and out of the medical fluid portion of the pumping chamber when the medical fluid pumping apparatus is connected to the medical fluid source and to the one or more motive fluid sources and the second and third preshaped diaphragm regions are actuated by motive fluid, and wherein the one or more motive fluid sources includes at least one of a positive pressure motive fluid source dedicated to providing positive pressure to multiple locations of the medical fluid pumping apparatus or a negative pressure motive fluid source dedicated to providing negative pressure to multiple locations of the medical fluid pumping apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A medical fluid pumping apparatus comprising:
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a first rigid plastic member defining a pump chamber cavity, an inlet valve seat, and an outlet valve seat; a first preshaped diaphragm region cooperating with the pump chamber cavity of the first rigid plastic member to at least partially define a medical fluid portion of a pumping chamber, the first preshaped diaphragm separating a motive fluid portion of the pumping chamber from the medical fluid portion of the pumping chamber; a second preshaped diaphragm region cooperating with the inlet valve seat of the first rigid plastic member to at least partially define a medical fluid passage of an inlet valve, the second preshaped diaphragm region separating a motive fluid portion of the inlet valve from the medical fluid passage of the inlet valve, the second preshaped diaphragm region being configured to have a convex shape when unstressed and a non-convex shape when pressure is applied to the second preshaped diaphragm region by motive fluid in the motive fluid portion of the inlet valve such that the medical fluid passage of the inlet valve is operated by actuation of the second preshaped diaphragm region using motive fluid in the motive fluid portion of the inlet valve; a third preshaped diaphragm region cooperating with the outlet valve seat of the first rigid plastic member to at least partially define a medical fluid passage of an outlet valve, the third preshaped diaphragm region being configured to have a convex shape when unstressed and a non-convex shape when pressure is applied to the third preshaped diaphragm region by motive fluid in a motive fluid portion of the outlet valve such that the medical fluid passage of the outlet valve is operated by actuation of the third preshaped diaphragm region using motive fluid in the motive fluid portion of the outlet valve; wherein the first preshaped diaphragm region is configured to draw medical fluid into the medical fluid portion of the pumping chamber via the medical fluid passage of the inlet valve and to pump the medical fluid out of the medical fluid portion of the pumping chamber via the medical fluid passage of the outlet valve when the medical fluid pumping apparatus is connected to a medical fluid source and to one or more motive fluid sources and the first preshaped diaphragm region is actuated by motive fluid, and the second and third preshaped diaphragm regions are configured to respectively control medical fluid flow into and out of the medical fluid portion of the pumping chamber when the medical fluid pumping apparatus is connected to the medical fluid source and to the one or more motive fluid sources and the second and third preshaped diaphragm regions are actuated by motive fluid, and wherein the one or more motive fluid sources includes at least one of a positive pressure motive fluid source dedicated to providing positive pressure to multiple locations of the medical fluid pumping apparatus or a negative pressure motive fluid source dedicated to providing negative pressure to multiple locations of the medical fluid pumping apparatus; and a second rigid plastic member permanently fixed to the first rigid plastic member, wherein the motive fluid portion of the pumping chamber, the motive fluid portion of the inlet valve and the motive fluid portion of the outlet valve are in fluid communication with a first motive fluid passageway, a second motive fluid passageway, and a third motive fluid passageway, respectively, defined by the second rigid plastic member, wherein the motive fluid passageways extend through the second rigid plastic member to a like surface of the second rigid plastic member, and wherein the motive fluid passageways are configured to mate with respective motive fluid connections on a mating surface of a pump control assembly via the like surface, and wherein the first and second rigid plastic members permanently fixed together are collectively mountable to and removable from the mating surface of the pump control assembly. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification