Drug delivery system
First Claim
1. A drug delivery system for implantation in a body for delivery of a liquid drug, the system comprising:
- a) an infusion housing defining a drug reservoir, a propellant chamber within the infusion housing and proximate the drug reservoir, wherein a positive pressure drug reservoir is created;
b) the drug reservoir having a reservoir inlet for receiving the liquid drug and a reservoir outlet;
c) a pump having a pump inlet and a pump outlet;
d) a first fluid passageway operable to transfer the liquid drug between the reservoir outlet and the pump inlet;
e) a first regulator having a first subchamber having a first regulator outlet and a second subchamber having a first regulator inlet;
f) a first opening between the first subchamber and the second subchamber;
g) a first diaphragm positioned in the second subchamber, the diaphragm moveable between an open position and a closed position to open and close the first opening, the diaphragm separating the second subchamber into a first middle chamber and a first lower chamber;
h) a second fluid passageway operable to transfer the liquid drug between the pump outlet and the first regulator inlet, the first regulator inlet positioned in the first middle chamber; and
i) a third fluid passageway between the lower chamber and the drug reservoir, whereby accidental flow from the reservoir to the first regulator outlet is prevented.
1 Assignment
0 Petitions
Accused Products
Abstract
A drug delivery system (10) has a positive pressure drug reservoir (15). A pump (19) is in fluid communication with the reservoir (15) via a first fluid passageway (18). The outlet (19b) of the pump (19) is in fluid communication with a first regulator (21). The regulator (21) includes a housing (24) that has a first subchamber (24a) and a second subchamber (24b). The second subchamber (24b) is divided into a lower chamber (28a) and a middle chamber (28b) by a diaphragm (28). A third fluid passageway (32) is positioned between the lower chamber (28a) and the drug reservoir (15), whereby accidental flow from the reservoir (15) to an outlet (21b) is prevented.
55 Citations
19 Claims
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1. A drug delivery system for implantation in a body for delivery of a liquid drug, the system comprising:
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a) an infusion housing defining a drug reservoir, a propellant chamber within the infusion housing and proximate the drug reservoir, wherein a positive pressure drug reservoir is created; b) the drug reservoir having a reservoir inlet for receiving the liquid drug and a reservoir outlet; c) a pump having a pump inlet and a pump outlet; d) a first fluid passageway operable to transfer the liquid drug between the reservoir outlet and the pump inlet; e) a first regulator having a first subchamber having a first regulator outlet and a second subchamber having a first regulator inlet; f) a first opening between the first subchamber and the second subchamber; g) a first diaphragm positioned in the second subchamber, the diaphragm moveable between an open position and a closed position to open and close the first opening, the diaphragm separating the second subchamber into a first middle chamber and a first lower chamber; h) a second fluid passageway operable to transfer the liquid drug between the pump outlet and the first regulator inlet, the first regulator inlet positioned in the first middle chamber; and i) a third fluid passageway between the lower chamber and the drug reservoir, whereby accidental flow from the reservoir to the first regulator outlet is prevented. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A drug delivery system for implantation in a body for delivery of a liquid drug, the system comprising:
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a) an infusion housing defining a drug reservoir, a propellant chamber within the infusion housing and proximate the drug reservoir, wherein a positive pressure drug reservoir is created; b) the drug reservoir having a reservoir inlet for receiving the liquid drug and a reservoir outlet; c) a pump having a pump inlet and a pump outlet; d) a first fluid passageway operable to transfer the liquid drug between the reservoir outlet and the pump inlet; e) a first regulator having a first subchamber having a first regulator outlet and a second subchamber having a first regulator inlet; f) a first opening between the first subchamber and the second subchamber; g) a first diaphragm positioned in the second subchamber, the first diaphragm moveable between an open position and a closed position to open and close the first opening, the diaphragm separating the second subchamber into a first middle chamber and a first lower chamber; h) a second fluid passageway operable to transfer the liquid drug between the pump outlet and the first regulator inlet, the first regulator inlet positioned in the first middle chamber; i) a second regulator having a third subchamber having a second regulator outlet and a fourth subchamber having a second regulator inlet; j) a second opening between the third subchamber and the fourth subchamber; k) a second diaphragm positioned in the fourth subchamber, the second diaphragm moveable between an open position and a closed position to open and close the second opening, the second diaphragm separating the fourth subchamber into a second middle chamber and a second lower chamber; l) a third fluid passageway between the first regulator outlet and the second regulator inlet; and m) a fourth fluid passageway between the first lower chamber and the drug reservoir, whereby accidental flow from the reservoir to the second regulator outlet is prevented. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A drug delivery system for implantation in a body for delivery of a liquid drug, the system comprising:
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a) an infusion housing defining a drug reservoir, a propellant chamber within the infusion housing and proximate the drug reservoir, wherein a positive pressure drug reservoir is created; b) the drug reservoir having a reservoir inlet for receiving the liquid drug and a reservoir outlet; c) a pump having a pump inlet and a pump outlet; d) a first fluid passageway operable to transfer the liquid drug between the reservoir outlet and the pump inlet; e) a first regulator having a first dividing member, the first dividing member forming a first subchamber and a second subchamber, the first dividing member defining a first opening centrally located in the first dividing member; f) a first diaphragm positioned in the second subchamber, the first diaphragm moveable between an open position and a closed position to open and close the first opening, the first diaphragm separating the second subchamber into a first middle chamber and a first lower chamber; g) a second fluid passageway operable to transfer the liquid drug between the pump outlet and the first regulator inlet, the first regulator inlet positioned in the first middle chamber; h) a second regulator having a second dividing member, the second dividing member forming a third subchamber and a fourth subchamber, the second dividing member defining a second opening centrally located in the second dividing member; i) a second diaphragm positioned in the fourth subchamber, the second diaphragm moveable between an open position and a closed position to open and close the second opening, the second diaphragm separating the fourth subchamber into a second middle chamber and a second lower chamber; and j) a third fluid passageway between the first regulator outlet and the second regulator inlet; and k) a fourth fluid passageway between the first lower chamber and the drug reservoir, whereby accidental flow from the reservoir to the second regulator outlet is prevented. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification