External Infusion Device with a Vented Housing

Abstract

An external infusion device for infusion of a fluid into a body from a reservoir includes a drive system, a housing, electronic control circuitry and at least one vent port. The drive system is operatively coupled with a reservoir to infuse a fluid into a body. The housing is adapted for use on an exterior of the body, and is sized to contain at least a portion of a reservoir. In addition, the drive mechanism is at least partially contained within the housing, and operatively couples with the at least a portion of a reservoir within the housing. Also, the housing is sized to be carried by a user without significant restriction on mobility. The electronic control circuitry is coupled to the drive system to control infusion of the fluid into the body. Moreover, the housing has at least one vent port that permits the passage of air into and out of the housing and inhibits the passage of liquids into the housing through the at least one vent port.

1 .- 45 . (canceled) 
   
   
       46 . An external infusion device for infusion of a fluid into a body from a reservoir, the external infusion device comprising:
 a drive system to operatively couple with the reservoir to infuse the fluid into the body;   a housing adapted for use on an exterior of the body, wherein the housing is sized to contain at least a portion of the reservoir, wherein the drive system is at least partially contained within the housing, wherein the drive system operatively couples with the at least a portion of the reservoir within the housing, and wherein the housing is sized to be carried by a user without significant restriction on mobility; and   electronic control circuitry coupled to the drive system to control infusion of the fluid into the body;   wherein a hydrophobic material is pressed into a cavity in the housing of the external infusion device forming a vent port on the housing that permits the passage of air into and out of the housing and inhibits the passage of liquids into the housing through the vent port and the hydrophobic material such that air pressure within an interior of the housing but external to the reservoir is equalized with air pressure outside of the housing by the passage of air into and out of the housing through the hydrophobic material, and   the hydrophobic material is pressed into the cavity such that it is flush with an exterior of the housing.   
   
   
       47 . An external infusion device according to  claim 46 , wherein the hydrophobic material is molded to fit the cavity in the housing. 
   
   
       48 . An external infusion device according to  claim 46 , wherein the hydrophobic material is formed from PTFE. 
   
   
       49 . An external infusion device according to  claim 46 , wherein the hydrophobic material resists the passage of water. 
   
   
       50 . An external infusion device according to  claim 46 , wherein the external infusion device is configured to infuse insulin. 
   
   
       51 . An external infusion device according to  claim 46 , wherein the housing and the vent port provide a water resistant structure that provides the user with the ability to participate in water sports. 
   
   
       52 . An external infusion device for infusion of a fluid into a body from a reservoir, the external infusion device comprising:
 a drive system to operatively couple with the reservoir to infuse the fluid into the body;   a housing adapted for use on an exterior of the body, wherein the housing is sized to contain at least a portion of the reservoir, wherein the drive system is at least partially contained within the housing, wherein the drive system operatively couples with the at least a portion of the reservoir within the housing, and wherein the housing is sized to be carried by a user without significant restriction on mobility; and   electronic control circuitry coupled to the drive system to control infusion of the fluid into the body;   wherein a hydrophobic material is pressed into a cavity in the housing of the external infusion device forming a vent port on the housing that permits the passage of air into and out of the housing and inhibits the passage of liquids into the housing through the vent port and the hydrophobic material such that air pressure within an interior of the housing but external to the reservoir is equalized with air pressure outside of the housing by the passage of air into and out of the housing through the hydrophobic material, and   the hydrophobic material substantially fills a volume of the cavity forming the vent port.   
   
   
       53 . An external infusion device according to  claim 52 , wherein the hydrophobic material is molded to fit the cavity in the housing. 
   
   
       54 . An external infusion device according to  claim 52 , wherein the hydrophobic material is formed from PTFE. 
   
   
       55 . An external infusion device according to  claim 52 , wherein the hydrophobic material resists the passage of water. 
   
   
       56 . An external infusion device according to  claim 52 , wherein the external infusion device is configured to infuse insulin. 
   
   
       57 . An external infusion device according to  claim 52 , wherein the housing and the vent port provide a water resistant structure that provides the user with the ability to participate in water sports.