Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1986-02-24
1987-05-12
Kartchner, Gene B.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604194, 604192, A61M 500
Patent
active
046646531
ABSTRACT:
One step manually activated injection apparatus capable of injecting multiple pre-measured doses of liquid medicaments without visibility of needle. It is composed of cylindrical housing unit with small aperture at bottom and removeable manual plunger unit at the top, and within housing unit there is a syringe unit composed of a piston, ampule with pre-measured liquid medicament, needle covered with sterile sheath and clip apparatus attached onto the ampule. The injection apparatus is placed in ready position by contacting the bottom of housing unit against a skin surface. One forward manual push on manual plunger unit performs two distinct functions. First, the manual plunger unit engages the clip apparatus attached to syringe ampule, permitting forward movement of syringe unit within housing unit, allowing needle to pierce sheath and pass externally through aperture of housing unit without visibility into the skin. Secondly, a continuous forward push on manual plunger unit allows clip apparatus to move into reduced diameter transitions in housing unit, forcing clips internally to contact onto ampule, permitting manual plunger unit to disengage from clip apparatus and move forward exerting pressure on syringe piston, which pushes liquid medicament through needle into the skin. After injection of liquid medicament, radial pressure exerted by clip apparatus against internal diameter of manual plunger unit permits removal of syringe unit (i.e. clip apparatus, syringe piston, needle and sheath) simply by pulling removeable manual plunger unit from housing unit. This allows ad-finitum exchange of syringe unit refills into cylindrical housing unit for subsequent premeasured liquid medicament injections.
REFERENCES:
patent: 3721241 (1973-03-01), Klohr et al.
patent: 3742948 (1973-07-01), Post et al.
patent: 3890971 (1975-06-01), Leeson et al.
patent: 3943927 (1976-03-01), Norgren
patent: 4394863 (1983-07-01), Bartner
patent: 4592745 (1986-06-01), Rex et al.
Sagstetter William E.
Wanderer Alan A.
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