Impulse chamber for jet delivery device
First Claim
1. A jet expelling assembly, comprising:
- a housing,a reservoir adapted to contain a fluid drug and comprising an outlet, and an impulse chamber assembly comprising;
a chamber portion defining a cavity having a general axis,a piston slidably received in the cavity along the general axis and comprising a fluid inlet and a fluid outlet, the cavity and the piston in combination defining a variable-volume impulse chamber, the inlet comprising a generally straight conduit protruding from the piston and arranged generally in parallel with the general axis, the conduit being adapted to slidably engage the reservoir outlet during relative movement therebetween, anda fluid outlet nozzle in fluid communication with the impulse chamber,wherein the reservoir outlet comprises a self-sealing septum, and the conduit comprises a pointed proximal end adapted to penetrate the self-sealing septum, wherein the self-sealing septum is adapted to reseal itself, andwherein when expelling an amount of drug from the reservoir to the impulse chamber via the inlet the chamber portion is arranged stationary relative to the reservoir, and the piston moves towards the reservoir, the impulse chamber thereby receiving the expelled amount of drug.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention provides a jet expelling assembly comprising a reservoir and an impulse chamber assembly. The impulse chamber assembly comprises a chamber portion defining a cavity having a general axis, a piston received in the cavity along the general axis and comprising a fluid inlet, thereby defining a variable-volume impulse chamber with an outlet nozzle. The inlet comprises a conduit adapted to slidably engage a reservoir outlet during relative movement therebetween. The chamber portion is arranged stationary relative to the reservoir, whereby expelling an amount of drug from the reservoir to the impulse chamber via the inlet causes the piston to move towards the reservoir, the impulse chamber thereby receiving the expelled amount of drug.
-
Citations
18 Claims
-
1. A jet expelling assembly, comprising:
-
a housing, a reservoir adapted to contain a fluid drug and comprising an outlet, and an impulse chamber assembly comprising; a chamber portion defining a cavity having a general axis, a piston slidably received in the cavity along the general axis and comprising a fluid inlet and a fluid outlet, the cavity and the piston in combination defining a variable-volume impulse chamber, the inlet comprising a generally straight conduit protruding from the piston and arranged generally in parallel with the general axis, the conduit being adapted to slidably engage the reservoir outlet during relative movement therebetween, and a fluid outlet nozzle in fluid communication with the impulse chamber, wherein the reservoir outlet comprises a self-sealing septum, and the conduit comprises a pointed proximal end adapted to penetrate the self-sealing septum, wherein the self-sealing septum is adapted to reseal itself, and wherein when expelling an amount of drug from the reservoir to the impulse chamber via the inlet the chamber portion is arranged stationary relative to the reservoir, and the piston moves towards the reservoir, the impulse chamber thereby receiving the expelled amount of drug. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method for expelling an amount of drug, comprising:
-
providing a jet expelling assembly comprising; a drug reservoir with an outlet, the reservoir outlet comprising a self-sealing septum, a variable-volume impulse chamber arranged stationary relative to the reservoir when expelling an amount of drug from the reservoir to the impulse chamber via an inlet, the variable-volume impulse chamber further comprising an axially displaceable piston, the piston in sliding engagement with the reservoir outlet and having a conduit with a pointed proximal end adapted to penetrate the self-sealing septum of the reservoir for fluid communication between the reservoir and the variable-volume impulse chamber, wherein the self-sealing septum is adapted to reseal itself, and a nozzle in fluid communication with the impulse chamber, whereby expelling an amount of drug comprises moving the piston towards the reservoir to expel an amount of drug from the reservoir to the impulse chamber, and moving the piston away from the reservoir to expel an amount of drug from the impulse chamber through the nozzle.
-
-
17. A jet expelling assembly, comprising:
-
a housing including at least one longitudinal slot, a reservoir adapted to contain a fluid drug and comprising an outlet, and an impulse chamber assembly comprising; a chamber portion defining a cavity having a general axis, a piston slidably received in the cavity along the general axis and comprising a fluid inlet and a fluid outlet, the cavity and the piston in combination defining a variable-volume impulse chamber, the inlet comprising a generally straight conduit protruding from the piston and arranged generally in parallel with the general axis, the conduit being adapted to slidably engage the reservoir outlet during relative movement therebetween, and the piston including at least one radial projection adapted to slidably engage the at least one longitudinal slot of the housing, and a fluid outlet nozzle in fluid communication with the impulse chamber, wherein the reservoir outlet comprises a self-sealing septum, and the conduit comprises a pointed proximal end adapted to penetrate the self-sealing septum, wherein the self-sealing septum is adapted to reseal itself, and wherein when expelling an amount of drug from the reservoir to the impulse chamber via the inlet, the chamber portion is arranged stationary relative to the reservoir, and the piston moves towards the reservoir along the at least one longitudinal slot of the housing, the impulse chamber thereby receiving the expelled amount of drug.
-
-
18. A method for expelling an amount of drug, comprising:
-
slidably receiving a piston in a cavity along a general axis, wherein; the piston comprises a fluid inlet and a fluid outlet; a housing includes at least one longitudinal slot; and a reservoir is adapted to contain a fluid drug and comprises an outlet and an impulse chamber assembly, wherein; a chamber portion defines the cavity along the general axis; the cavity and the piston in combination define a variable-volume impulse chamber; the inlet comprises a generally straight conduit protruding from the piston and arranged generally in parallel with the general axis; the conduit is adapted to slidably engage the reservoir outlet during relative movement therebetween; the piston comprises at least one radial projection adapted to slidably engage at least one longitudinal slot of the housing; the reservoir outlet comprises a self-sealing septum; and the conduit comprises a pointed proximal end adapted to penetrate the self-sealing septum, wherein the self-sealing septum is adapted to reseal itself, wherein when expelling an amount of drug from the reservoir to the impulse chamber via the inlet, the chamber portion is arranged stationary relative to the reservoir, and the piston moves towards the reservoir along the at least one longitudinal slot of the housing, the impulse chamber thereby receiving the expelled amount of drug.
-
Specification