Pump with venting
First Claim
Patent Images
1. A medication pump, comprising:
- a housing including an external wall and a plurality of internal adjoining housings, including a first housing enclosing a cartridge and a second housing;
a primary vent for venting gas between the medication pump and atmosphere outside the medication pump, the primary vent including a primary liquid barrier allowing passage of gas therethrough while preventing passage of liquid therethrough; and
a secondary vent on the first housing for internally venting gas between the first housing and the second housing, the secondary vent including a secondary liquid barrier allowing passage of gas therethrough to an interior of the housing while preventing passage of liquid therethrough.
2 Assignments
0 Petitions
Accused Products
Abstract
A medication pump includes a housing including an external wall and a plurality of internal adjoining housings, including a first housing enclosing a cartridge. The pump includes a primary vent for venting the medication pump to atmosphere, the primary vent including a primary liquid barrier allowing passage of gas therethrough while preventing passage of liquid therethrough. The pump includes a secondary vent on the first housing, the secondary vent including a secondary liquid barrier allowing passage of gas therethrough to an interior of the housing while preventing passage of liquid therethrough.
-
Citations
18 Claims
-
1. A medication pump, comprising:
-
a housing including an external wall and a plurality of internal adjoining housings, including a first housing enclosing a cartridge and a second housing; a primary vent for venting gas between the medication pump and atmosphere outside the medication pump, the primary vent including a primary liquid barrier allowing passage of gas therethrough while preventing passage of liquid therethrough; and a secondary vent on the first housing for internally venting gas between the first housing and the second housing, the secondary vent including a secondary liquid barrier allowing passage of gas therethrough to an interior of the housing while preventing passage of liquid therethrough. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A medication pump, comprising:
-
an outer housing defining an interior with one or more walls coupled to the housing that divide the interior into at least first and second chambers, the first chamber being a cartridge chamber including a drive rod extending therein, the drive rod configured to couple to a plunger of a cartridge; and an interior vent formed between the first and second chambers, the interior vent including a liquid barrier allowing passage of gas between the first and second chambers while preventing passage of liquid therethrough. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of venting a medication pump, the method comprising:
-
forming an interior vent between first and second chambers defined by a wall in an interior of a housing of the medication pump, the interior vent including a liquid barrier allowing passage of gas between the first and second chambers while preventing passage of liquid therethrough; forming the first chamber as a cartridge chamber including a drive rod extending therein, the drive rod configured to couple to a plunger of a cartridge; and allowing gas to pass through the interior vent from the first chamber to the second chamber. - View Dependent Claims (15, 16, 17, 18)
-
Specification