Impulse chamber for jet delivery device
First Claim
1. An impulse chamber unit (1, 2, 3) comprising:
- a deformable chamber portion (10, 50) having an outer surface, the outer surface being substantially free, a variable-volume impulse chamber (11, 55) defined at least partially by the deformable chamber portion and adapted for containing a volume of a flowable drug, an outlet nozzle (23, 61) in fluid communication with the impulse chamber and being adapted to be arranged against a skin surface of a subject, and an inlet (33, 39, 51) in fluid communication with the impulse chamber, wherein deformation of the chamber portion (10, 50) reduces the volume of the impulse chamber.
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Accused Products
Abstract
The invention relates to an impulse chamber which can be used for expelling an amount of a fluid compound at a high pressure. The impulse chamber comprises a variable-volume impulse chamber adapted for containing a volume of a flowable drug, an outlet nozzle in fluid communication with the impulse chamber and being adapted to be arranged against the skin of a subject, and a fluid inlet in fluid communication with the impulse chamber. The impulse chamber is defined substantially by a deformable chamber portion, such that deformation thereof reduces the volume of the cavity. In an exemplary embodiment the compressible chamber portion is in the form of an elastomeric tube, this providing a simple, yet reliable and cost-effective impulse chamber unit.
355 Citations
19 Claims
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1. An impulse chamber unit (1, 2, 3) comprising:
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a deformable chamber portion (10, 50) having an outer surface, the outer surface being substantially free, a variable-volume impulse chamber (11, 55) defined at least partially by the deformable chamber portion and adapted for containing a volume of a flowable drug, an outlet nozzle (23, 61) in fluid communication with the impulse chamber and being adapted to be arranged against a skin surface of a subject, and an inlet (33, 39, 51) in fluid communication with the impulse chamber, wherein deformation of the chamber portion (10, 50) reduces the volume of the impulse chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification