External infusion device having a casing with multiple cross-vented hermetically-sealed housings
First Claim
1. An infusion device, comprising. a casing comprising an external wall and a plurality of internal adjoining housings, including a first housing enclosing a liquid reservoir and a drive mechanism;
- an electronics assembly and a pump assembly provided in a second housing for controlling the drive mechanism to dispense the liquid from the reservoir according to a selected pattern;
a battery provided in a third housing; and
a primary vent provided for venting the infusion device to atmosphere, said primary vent comprising a hydrophobic barrier allowing passage of gas therethrough while preventing passage of liquid therethrough; and
at least one secondary vent provided between selected ones of said housings;
said at least one secondary vent including a hydrophobic barrier allowing passage of gas therethrough while preventing passage of liquid therethrough.
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Accused Products
Abstract
An external infusion device enclosed in a multiple-housing casing. Enclosed within an outer wall, a first housing encloses a reservoir of liquid and a drive mechanism. A second housing encloses a pump and electronics for controlling the drive mechanism to dispense the liquid from the reservoir according to a selected pattern. A separate third housing encloses a battery or batteries. The first and third housings are vented to atmosphere via primary vents with hydrophobic barriers. The second housing is vented to at least one of the first and third housings via a secondary vent with a hydrophobic barrier. The hydrophobic barriers allow passage of air, and allow pressure equalization, but prevent passage of liquid. Liquid entering one housing is prevented from flowing into the other adjoining housings.
34 Citations
32 Claims
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1. An infusion device, comprising.
a casing comprising an external wall and a plurality of internal adjoining housings, including a first housing enclosing a liquid reservoir and a drive mechanism; -
an electronics assembly and a pump assembly provided in a second housing for controlling the drive mechanism to dispense the liquid from the reservoir according to a selected pattern;
a battery provided in a third housing; and
a primary vent provided for venting the infusion device to atmosphere, said primary vent comprising a hydrophobic barrier allowing passage of gas therethrough while preventing passage of liquid therethrough; and
at least one secondary vent provided between selected ones of said housings;
said at least one secondary vent including a hydrophobic barrier allowing passage of gas therethrough while preventing passage of liquid therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A casing for an external infusion pump, comprising:
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an outer wall;
a reservoir housing configured to enclose a liquid reservoir and a drive mechanism. an internal electronics and mechanical housing configured to enclose pump components and an electronic control assembly;
a battery housing configured to enclose at least one battery;
a plurality of primary vents for venting the casing to atmosphere; and
at least one secondary vent provided between said electronics and mechanical housing and at least one of said reservoir and battery housings. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification