Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1985-03-25
1986-06-24
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
A61M 530
Patent
active
045965560
ABSTRACT:
The present invention provides a pressure-operated hypodermic injection apparatus which is particularly suitable for needleless operation. The apparatus includes an elongate shell having an inwardly facing wall with a uniform configuration along a defined length thereof, with the shell further defining a discharge aperture adjacent one end thereof. It further includes a plunger which is slideably disposed within the defined length of the shell, and which is shiftable between a ready position and a spent position, with the spent position being closer to the aperture than the ready position. With the plunger in its ready position, the shell and plunger collectively define an ampule chamber which is capable of containing a dischargeable medication. A pressurized-gas cartridge is mounted to the plunger to shift therewith, and has gas-releasing means which faces away from the discharge aperture. A body is further included which is sealingly and releasably joined to the other end of the shell. An actuator is mounted to the body and is manually operable for selectively operating the gas-releasing means to drive the plunger from its ready toward its spent position to discharge medication from the apparatus and into the patient.
REFERENCES:
patent: 2737946 (1956-03-01), Hein, Jr.
patent: 2764977 (1956-10-01), Ferguson
patent: 3688765 (1972-09-01), Gasaway
patent: 3695266 (1972-10-01), Lussier
patent: 3853125 (1974-12-01), Clark et al.
patent: 4329988 (1982-05-01), Sarnoff et al.
patent: 4403989 (1983-09-01), Christensen et al.
Covey Eugene C.
Morrow J. Thomas
Bioject Inc.
Yasko John D.
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