In-line fluid transfer devices and ambulatory infusion devices including the same
First Claim
Patent Images
1. An infusion device, comprising:
- a fluid transfer device includingan electromagnet including a coil having an inner-most diameter that defines an internal volume, a case defining an internal volume in which the coil is located, and a core having a fluid lumen, with an inlet and an outlet, extending therethrough, at least a portion of the core located within the internal volume defined by the case, anda piston that is movable relative to the core between a rest position and a pull-back position adjacent to the core and is biased to the rest position, the piston having a magnetic portion that is located within the volume defined by the inner-most diameter of the coil;
an infusion device outlet operably connected to the fluid transfer device; and
a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir.
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Accused Products
Abstract
Fluid transfer devices for use in, for example, ambulatory infusion devices and infusions devices including fluid transfer devices.
17 Citations
37 Claims
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1. An infusion device, comprising:
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a fluid transfer device including an electromagnet including a coil having an inner-most diameter that defines an internal volume, a case defining an internal volume in which the coil is located, and a core having a fluid lumen, with an inlet and an outlet, extending therethrough, at least a portion of the core located within the internal volume defined by the case, and a piston that is movable relative to the core between a rest position and a pull-back position adjacent to the core and is biased to the rest position, the piston having a magnetic portion that is located within the volume defined by the inner-most diameter of the coil; an infusion device outlet operably connected to the fluid transfer device; and a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 35, 36)
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10. An infusion device, comprising:
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a fluid transfer device including an electromagnet including a coil, a case defining an internal volume, and a core formed from magnetic material and having a fluid lumen, with an inlet and an outlet, extending therethrough, at least a portion of the core located within the internal volume defined by the case, a piston having a portion that is magnetic and is located within the internal volume defined by the case, movable relative to the core between a rest position and a pull-back position adjacent to the core, and biased to the rest position, and an outer pump tube, wherein the coil is carried outside the outer pump tube and the core and the piston are carried inside the outer pump tube; an infusion device outlet operably connected to the fluid transfer device; and a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir. - View Dependent Claims (11, 12, 13)
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14. An infusion device, comprising:
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a fluid transfer device including an outer pump tube defining an inner surface, an inner pump tube located within the outer pump tube and defining a piston lumen and an outer surface, a piston which defines first and second longitudinal ends and a longitudinally extending outer surface, does not include a fluid lumen extending therethrough, and has at least a portion thereof mounted within the piston lumen such that the piston lumen and the first longitudinal end define an inlet chamber and a longitudinally extending capillary seal is formed between the longitudinally extending outer surface of the piston and the inner pump tube, an electromagnet including a coil carried outside the outer pump tube and a core formed from magnetic material and having a fluid lumen, with an inlet and an outlet, carried inside the outer pump tube such that an outlet chamber is defined between the second longitudinal end of the piston and the core, a bypass channel, defined at least in part by in the outer surface of the inner pump tube and the inner surface of the outer pump tube, that connects the inlet chamber and the outlet chamber, and a bypass valve associated with the inner pump tube, the inlet chamber and the bypass channel; an infusion device outlet operably connected to the fluid transfer device; and a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 37)
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28. An infusion device, comprising:
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a fluid transfer device including a housing defining a piston lumen, a piston stop formed at least in part from magnetic material, located within the housing, and including a fluid lumen defining an inlet and an outlet, an inlet valve located within the housing, an electromagnet coil carried on the housing, a piston which defines first and second longitudinal ends, does not include a fluid lumen extending therethrough, is formed at least in part from magnetic material, and has at least a portion thereof mounted within piston lumen such that the first longitudinal end and the piston lumen together define an inlet chamber having a volume and the second longitudinal end and the piston stop together define an outlet chamber, the piston being movable between a first position, where the volume of the inlet chamber is minimized and the first longitudinal end abuts the inlet valve, and a second position, where the second longitudinal end of the piston abuts the piston stop and the prevents flow into the inlet of the piston stop lumen, and a spring that biases the piston to the first position, at least a portion of the spring being located within the piston stop fluid lumen; an infusion device outlet operably connected to the fluid transfer device; and a reservoir operably connected to the fluid transfer device such that the fluid transfer device receives fluid from the reservoir. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification