Advancing mechanism for an injection device
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United States of America Patent
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-
Mar 5, 1996
Grant Date -
N/A
app pub date -
May 12, 1994
filing date -
Jun 4, 1993
priority date (Note) -
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status (Latency Note)
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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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