Advancing mechanism for an injection device

Details Advancing mechanism for an injection device Advancing mechanism for an injection device

1994-05-12

1996-03-05

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604209, A61M 500

Patent

active

054962935

ABSTRACT:
A feed mechanism for an injection device having an ampoule casing (13) includes an outer casing (2), an inner casing (3) protruding rearwardly from the outer casing and a toothed rack (4) longitudinally displaceable with the inner casing against the force of a spring (8). The rack has teeth (5) of which the length L corresponds to one full injection dose. The inner casing is longitudinally movable by a length L between two stops (6, 7) in the inner and outer casings. The inner casing has a latch (9, 10) which detachably locks the inner casing at its extreme forward position into an aperture (11) of the ampoule casing. A pawl prevents return movement of the rack.

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patent: 5281198 (1994-01-01), Haber et al.
patent: 5385558 (1995-01-01), Cottone, Sr. et al.

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