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AssigneesChris C. Christiansen, James M. Olsen
InventorsChris C. Christiansen, James M. Olsen
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A human body implantable drug delivery pump comprises a housing including at least a first shield and a second shield. The housing defines an interior within the shields. The pump further includes a fluid reservoir within the housing, a fluid conduit also within the housing from the reservoir, an outlet from the fluid conduit to the exterior of the housing, and a pump member in the housing adapted to move fluid through the fluid conduit to the outlet. The fluid in the reservoir and fluid conduit is isolated from the pump interior. The pump further comprises a desiccant in the pump interior, the desiccant absorbent of moisture in the pump interior, and preferably absorbent of substantially all the moisture in the pump interior. The desiccant also preferably has a moisture absorbent property dependent on temperature, being lessened at higher temperatures, the desiccant being pre-baked to improve its moisture absorbent property before being placed in the pump. Most preferably, the desiccant is still further absorbent of moisture, whereby the desiccant may be placed within the housing during final assembly of the pump when the pump housing is not completely sealed, and the desiccant is absorbent during a time period of final assembly, and remains absorbent of substantially all the moisture within the housing after complete sealing of the housing. The desiccant may be molded to fit free space within the housing, and the desiccant may comprise liquid silicon rubber and aluminum oxide. A prior art, time consuming, baking of the whole pump and creation and sealing of a tig hole, is avoided.
A human body implantable drug delivery pump comprising a housing of assembled components, the pump further comprising a desiccant located interiorly to the housing, whereby the desiccant absorbs moisture within the housing.
A human body implantable drug delivery pump, the pump comprising a housing including at least a first shield and a second shield, the housing defining an interior within the shields, the pump further including a fluid reservoir within the housing, a fluid conduit also within the housing from the reservoir, an outlet from the fluid conduit to the exterior of the housing, and a pump member in the housing adapted to move fluid through the fluid conduit to the outlet, the fluid in the reservoir and fluid conduit isolated from the pump interior, the pump further comprising a desiccant in the pump interior, the desiccant absorbent of moisture in the pump interior.
A desiccant for a human body implantable drug delivery pump, the pump comprising a housing including at least a first shield and a second shield, the housing defining an interior within the shields, the pump further including a fluid reservoir within the housing, a fluid conduit also within the housing from the reservoir, an outlet from the fluid conduit to the exterior of the housing, and a pump member in the housing adapted to move fluid through the fluid conduit to the outlet, the fluid in the reservoir and fluid conduit isolated from the pump interior, the desiccant being absorbent of substantially all the moisture within the pump interior, the desiccant having a moisture absorbent property dependent on temperature, being improved after being raised to higher temperatures, the desiccant being pre-baked to improve its moisture absorbent property before being placed in the pump, the desiccant being further absorbent of moisture, whereby the desiccant may be placed within the housing during final assembly of the pump when the pump housing is not completely sealed, and the desiccant is absorbent during a time period of final assembly, and remains absorbent of substantially all the moisture within the housing after complete sealing of the housing, the desiccant being molded to fit free space within the housing, and the desiccant comprising liquid silicon rubber and aluminum oxide.
A method of manufacturing a human body implantable drug delivery pump, comprising forming the pump as having a housing including at least a first shield and a second shield, the housing defining an interior within the shields, the pump further including a fluid reservoir within the housing, a fluid conduit also within the housing from the reservoir, an outlet from the fluid conduit to the exterior of the housing, and a pump member in the housing adapted to move fluid through the fluid conduit to the outlet, the fluid in the reservoir and fluid conduit isolated from the pump interior, the method also comprising inserting in the pump interior a desiccant and then sealing the housing in a final assembly step, the desiccant being one that is absorbent of substantially all the moisture within the pump interior, the desiccant having a moisture absorbent property dependent on temperature, being improved after being raised to higher temperatures, the desiccant being pre-baked to improve its moisture absorbent property before being placed in the pump, the desiccant also being formed in type and size to be further absorbent of moisture, whereby the desiccant may be placed within the housing during final assembly of the pump when the pump housing is not completely sealed, and the desiccant is absorbent during a time period of final assembly, and remains absorbent of substantially all the moisture within the housing after complete sealing of the housing, the desiccant further being molded to fit free space within the housing, and the desiccant comprising liquid silicon rubber and aluminum oxide.
Dependencies are inferred from the claim text.