Injector administering subcutaneous injections without a needle

Details Injector administering subcutaneous injections without a needle Injector administering subcutaneous injections without a needle

1992-07-17

1993-10-26

Lewis, Ralph

Surgery

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

Treating material introduced into or removed from body...

604 71, 604110, A61M 530

Patent

active

052561429

ABSTRACT:
Injector administering subcutaneous injections without a needle and with a one-shot cap. The injector (11) includes an injection head (16), a chamber (27) to contain medicament which cooperates with a piston (28), an outlet aperture (15) for the medicament, means (30) to convey the medicament into the containing chamber (27), means to compress means which expel the medicament and a cocking and trigger assembly to actuate the expulsion means. The injector may also include means to measure the quantity of medicament charged and possibly means to limit the charging. In cooperation with the injector (11) is a frontal replaceable one-shot cap (10) with a removable stopper (12) which is broken in a pre-set manner. An axially movable striker (26) is also included and has a first breakage position and a second injection position defined by the replaceable one-shot cap (10). The first breakage position is associated substantially with the position of complete expulsion of the medicament from the containing chamber (27) by the piston (28).

REFERENCES:
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patent: 5000738 (1991-03-01), LaVallo et al.
patent: 5026343 (1991-06-01), Holzer
patent: 5062830 (1991-11-01), Dunlap

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