Patent ID: 8061006

Claim:
A kit of parts for use in the manufacture of a particle cassette for a needleless syringe device, said kit comprising: a first cassette part having a first rupturable membrane sealed thereto; and a second cassette part having a second rupturable membrane sealed thereto, said first and second cassette parts being arranged to be attachable together so as to create a chamber for the confinement of particles between said first and second membranes, the first and second cassette parts being directly connected to each other, wherein one of said first and second cassette parts comprises an open chamber that is arranged to open outwardly with respect to an assembled cassette formed by attaching the first and second cassette parts together when the first and second cassette parts are attached together, wherein after the first cassette part and the second cassette part are attached together, they are adapted to be installed in a needleless syringe device which utilizes gas pressure to rupture at least one of the first rupturable membrane and the second rupturable membrane, and wherein an inner wall of the second cassette part and an outer wall of the first cassette part define an annular gap around the first cassette part when the first and second cassette parts are directly connected to each other.