Ambulatory drug delivery device

Ambulatory fluid delivery apparatus, comprising:

• a housing;
• spiral passageway means in said housing for carrying a fluid to be delivered, said passageway means having an inlet and an outlet;
• pump means in communication with said inlet for pressurizing a driving fluid and introducing said pressurized driving fluid into said passageway means;
• fluid delivery means in communication with said outlet for delivering fluid from said passageway means upon said introduction of pressurized driving fluid;
• and
• attachment means for attaching said housing to a user's body.

Ambulatory fluid delivery apparatus, comprising:

• a housing;
• passageway means in said housing for carrying a fluid to be delivered, said passageway means having an inlet and an outlet;
• pump means in communication with said inlet for pressurizing a driving fluid and introducing said pressurized driving fluid into said passageway means;
• fluid delivery means in communication with said outlet for delivering fluid from said passageway means upon said introduction of pressurized driving fluid;
• attachment means for attaching said housing to a user's body;
• and
• filter means in communication with said outlet for preventing gas in said passageway means from entering said fluid delivery means, said filter means comprising;
• a fluid chamber in communication with said outlet for receiving fluid from said passageway means upon said introduction of pressurized driving fluid;
• a first outlet port establishing communication between said chamber and the atmosphere and a second outlet port establishing communication between said chamber and said fluid deliver means;
• a hydrophobic membrane disposed across said first outlet port for venting gas from said chamber into said atmosphere and retaining liquid in said chamber;
• and
• a hydrophylic membrane disposed across said second outlet port for retaining gas in said chamber and venting liquid from said chamber into said fluid delivery means.

Ambulatory fluid delivery apparatus, comprising;

• a housing having a disposable portion and a reusable portion detachably connected thereto;
• passageway means in said disposable portion for carrying a fluid to be delivered, said passageway means having an inlet and an outlet;
• pump means in said reusable portion in communication with said inlet for pressurizing a driving fluid and introducing said pressurized driving fluid into said passageway means;
• fluid delivery means in said disposable portion in communication with said outlet for delivering fluid from said passageway means upon said introduction of pressurized driving fluid;
• attachment means for attaching said housing to a user's body;
• power source means for supplying electrical power to said pump means;
• and
• switch means electrically connected to said power source means and said pump means for selectively establishing electrical communication therebetween, said switch means being mounted on said reusable portion and being configured to establish said electrical communication when said reusable portion is connected to said disposable portion.

Ambulatory fluid delivery apparatus, comprising:

• a housing;
• passageway means in said housing for carrying a fluid to be delivered, said passageway means having an inlet and an outlet;
• pump means in communication with said inlet for pressurizing a driving fluid and introducing said pressurized driving fluid into said passageway means;
• fluid delivery means in communication with said outlet for delivering fluid from said passageway means upon said introduction of pressurized driving fluid;
• attachment means for attaching said housing to a user's body;
• and
• pressure sensor means operatively connected to said pump means for inactivating said pump means upon sensing pressure outside predetermined levels, said pressure sensor means being in communication with said passageway means for sensing fluid pressure therein.