Fluid transfer devices with fluid bypass and ambulatory infusion devices including same
First Claim
Patent Images
1. An infusion device, comprising:
- a fluid transfer device includingan external housing tube having an inner surface,an internal housing tube defining a piston lumen having a pump chamber, an outer surface having a perimeter, and a bypass aperture having an inlet associated with the pump chamber and an outlet adjacent to the outer surface and defining a bypass aperture longitudinal axis, at least a portion of the internal housing tube being located within the external housing tube such that at least a portion of the outer surface of the internal housing tube is proximate the inner surface of the external housing tube,a bypass channel in fluid communication with the bypass aperture outlet,a resilient valve member that extends around the perimeter of the internal housing tube outer surface and over the bypass aperture outlet, anda piston carried within the piston lumen and movable between a pull-back position where the pump chamber volume is maximized and a rest position where the pump chamber volume minimized, the piston defining a longitudinal axis that is transverse to the bypass aperture longitudinal axis,wherein the internal housing tube, resilient valve member and piston are configured and positioned relative to one another such that fluid is drawn into the pump chamber as the piston moves to the pull-back position and the fluid within the pump chamber is forced through the bypass aperture and past resilient valve member as the piston moves to the rest position;
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 such fluid transfer devices. The fluid transfer devices may include an external housing tube, an internal housing tube that has a piston lumen with a pump chamber, an outer surface, and a bypass aperture with an inlet associated with the pump chamber and an outlet adjacent to the outer surface, a bypass channel in fluid communication with the bypass aperture outlet, a resilient valve member associated with the bypass aperture outlet, and a piston carried within the piston lumen.
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Citations
34 Claims
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1. An infusion device, comprising:
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a fluid transfer device including an external housing tube having an inner surface, an internal housing tube defining a piston lumen having a pump chamber, an outer surface having a perimeter, and a bypass aperture having an inlet associated with the pump chamber and an outlet adjacent to the outer surface and defining a bypass aperture longitudinal axis, at least a portion of the internal housing tube being located within the external housing tube such that at least a portion of the outer surface of the internal housing tube is proximate the inner surface of the external housing tube, a bypass channel in fluid communication with the bypass aperture outlet, a resilient valve member that extends around the perimeter of the internal housing tube outer surface and over the bypass aperture outlet, and a piston carried within the piston lumen and movable between a pull-back position where the pump chamber volume is maximized and a rest position where the pump chamber volume minimized, the piston defining a longitudinal axis that is transverse to the bypass aperture longitudinal axis, wherein the internal housing tube, resilient valve member and piston are configured and positioned relative to one another such that fluid is drawn into the pump chamber as the piston moves to the pull-back position and the fluid within the pump chamber is forced through the bypass aperture and past resilient valve member as the piston moves to the rest position; 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, 10, 11, 12, 13, 14)
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15. An infusion device, comprising:
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a fluid transfer device including an external housing tube having an inner surface, an internal housing tube member defining a piston lumen, an outer surface having a perimeter, a longitudinal end, and a bypass aperture located adjacent to longitudinal end and having an inlet associated with the piston lumen and an outlet associated with the outer surface, at least a portion of the internal housing tube being located within the external housing tube such that at least a portion of the outer surface of the internal housing tube is proximate the inner surface of the external housing tube, a bypass channel in fluid communication with the bypass aperture outlet, a resilient valve member that extends around the perimeter of the internal housing tube outer surface and over the bypass aperture outlet, and a piston carried within the piston lumen and configured such that no portion of the bypass channel is located within the piston; 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 (16)
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17. An infusion device, comprising:
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a fluid transfer device including an external housing tube having an inner surface, an internal housing tube defining a piston lumen, an outer surface having a perimeter, and a bypass aperture having an inlet associated with the piston lumen and an outlet associated with the outer surface, at least a portion of the internal housing tube being located within the external housing tube such that at least a portion of the outer surface of the internal housing tube is proximate the inner surface of the external housing tube, a bypass channel, defined by the external housing tube inner surface and the internal housing tube outer surface, in fluid communication with the bypass aperture outlet, a piston carried within the piston lumen and movable relative to the bypass aperture, and a valve member that covers the bypass aperture outlet at a location in spaced relation to the piston and is movable between an open position that permits flow though the bypass aperture and into the bypass channel and a closed position that prevents flow into the bypass aperture from the bypass channel; and 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 (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An infusion device, comprising:
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a fluid transfer device including an external housing tube having an inner surface, an internal housing tube defining a piston lumen having a pump chamber, an outer surface having a perimeter, and a bypass aperture having an inlet associated with the pump chamber and an outlet adjacent to the outer surface, at least a portion of the internal housing tube being located within the external housing tube such that at least a portion of the outer surface of the internal housing tube is proximate the inner surface of the external housing tube, a bypass channel in fluid communication with the bypass aperture outlet, a resilient valve member that extends around the perimeter of the internal housing tube outer surface and over the bypass aperture outlet, and a piston carried within the piston lumen and movable between a pull-back position where the pump chamber volume is maximized and a rest position where the pump chamber volume minimized, wherein the internal housing tube, resilient valve member and piston are configured and positioned relative to one another such that fluid is drawn into the pump chamber as the piston moves to the pull-back position and the fluid within the pump chamber is forced through the bypass aperture and past resilient valve member as the piston moves to the rest position, and wherein the piston moves in a first direction when moving from the pull-back position to the rest position and the fluid flows through the bypass channel in a second direction that is different than the first direction as the piston moves in the first direction; 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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34. An infusion device, comprising:
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a fluid transfer device including an external housing tube having an inner surface, an internal housing tube defining a piston lumen having a pump chamber, an outer surface having a perimeter, and a bypass aperture having an inlet associated with the pump chamber and an outlet adjacent to the outer surface, at least a portion of the internal housing tube being located within the external housing tube such that at least a portion of the outer surface of the internal housing tube is proximate the inner surface of the external housing tube, a bypass channel defines an inlet end at the bypass aperture outlet and an outlet end, a resilient valve member that extends around the perimeter of the internal housing tube outer surface and over the bypass aperture outlet, a piston carried within the piston lumen and movable between a pull-back position where the pump chamber volume is maximized and a rest position where the pump chamber volume minimized, and an outlet valve at the outlet end of the bypass channel, wherein the internal housing tube, resilient valve member and piston are configured and positioned relative to one another such that fluid is drawn into the pump chamber as the piston moves to the pull-back position and the fluid within the pump chamber is forced through the bypass aperture and past resilient valve member as the piston moves to the rest position; 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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Specification