Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-07-23
1995-03-21
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 72, 604187, 604140, A61M 530
Patent
active
053991630
ABSTRACT:
A needleless injection device includes an initiator valve controlling flow of compressed gas into a reservoir. A poppet valve connecting to the reservoir has a gas pressure regulation end to regulate flow from the initiator valve into the reservoir. A clamp piston is driven forward by gas pressure from the reservoir and causes jaws to clamp onto a plunger extending into an ampule. The poppet valve opens when reservoir pressure reaches the cracking pressure of the poppet valve. Gas from the reservoir rushes through the poppet valve into a drive chamber and forces a drive piston, containing the clamp piston and jaws, forward causing the plunger to slide into the ampule. A jet of injectant is discharged from the nozzle of the ampule and penetrates through the patient's skin. An improved method of needleless injection uses a specific pressure profile, ampule nozzle diameter, patient, injection site, and injectant parameters.
REFERENCES:
patent: 2380534 (1945-07-01), Lockhart
patent: 2670121 (1954-02-01), Scherer et al.
patent: 2704543 (1955-03-01), Scherer
patent: 3424154 (1969-01-01), Kinsley
patent: 3561443 (1971-02-01), Banker
patent: 3945379 (1976-03-01), Pritz et al.
patent: 4059107 (1977-11-01), Iriguchi et al.
patent: 4623332 (1986-11-01), Lindmayer et al.
patent: 4680027 (1987-07-01), Parsons et al.
patent: 4722728 (1988-02-01), Dixon
patent: 4790824 (1988-12-01), Morrow et al.
patent: 4850967 (1989-07-01), Cosmai
patent: 5062830 (1991-11-01), Dunlap
patent: 5064413 (1991-11-01), McKinnon et al.
patent: 5073165 (1991-12-01), Edwards
patent: 5116313 (1992-05-01), McGregor
Bartholomew Victor L.
McKinnon, Jr. Charles N.
Nakagawa Takaaki
Peterson Steven F.
Smith Paul E.
Bioject Inc.
Rosenbaum C. Fred
Van Over Perry E.
LandOfFree
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