Needleless hypodermic injection device

Details Needleless hypodermic injection device Needleless hypodermic injection device

1991-06-13

1994-05-17

Lewis, Ralph

Surgery

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

Treating material introduced into or removed from body...

604 68, A61M 530

Patent

active

053123352

ABSTRACT:
A needleless injection device has a housing containing a pilot valve connectable to a compressed gas source. A two stage power amplifying valve includes a main valve operatively connected to the pilot valve. The pilot valve and main valve form a two-stage valve with the pilot valve activatable to open the main valve utilizing gas pressure. Compressed gas in a reservoir flows through the open main valve to drive a plunger into an ampule to inject an injectant through a patient's skin. Interlocks are provided to resist inadvertent actuation of the device and a indicator indicates whether there is sufficient gas pressure in the device for another injection. An ampule for needleless injection has a nozzle length to nozzle diameter ratio of from 2.0 to 5.0 and a throat cone flair angle of from 10-14 degrees.

REFERENCES:
patent: 2025219 (1935-12-01), Smith
patent: 2322245 (1943-06-01), Lockhart
patent: 2670121 (1954-02-01), Scherer et al.
patent: 2688968 (1954-09-01), Scherer
patent: 2704543 (1955-03-01), Scherer
patent: 2714887 (1955-08-01), Venditty
patent: 2737946 (1956-03-01), Hein, Jr.
patent: 2816543 (1957-12-01), Venditty et al.
patent: 2821193 (1958-01-01), Ziherl et al.
patent: 2902995 (1959-09-01), Loper
patent: 3179107 (1965-04-01), Clark
patent: 3490451 (1970-01-01), Yahner
patent: 3557784 (1971-01-01), Shields
patent: 3688765 (1972-09-01), Gasaway
patent: 3714943 (1973-02-01), Yanof et al.
patent: 3802430 (1974-04-01), Schwebel et al.
patent: 3853125 (1974-12-01), Clark
patent: 3945379 (1976-03-01), Pritz et al.
patent: 3945383 (1976-03-01), Bennett et al.
patent: 4124024 (1978-11-01), Schwebel et al.
patent: 4240428 (1980-12-01), Akhavi
patent: 4507113 (1985-03-01), Dunlap
patent: 4596556 (1986-06-01), Morrow et al.
patent: 4623332 (1986-11-01), Lindmayer et al.
patent: 4680027 (1987-07-01), Parsons et al.
patent: 4790824 (1988-12-01), Morrow et al.
patent: 4874367 (1989-10-01), Edwards
patent: 4940460 (1990-07-01), Casey
patent: 4941880 (1990-07-01), Burns
patent: 4966581 (1990-10-01), Landau
patent: 5062830 (1991-11-01), Dunlap
patent: 5080648 (1992-01-01), D'Antonio

Affiliated with

Also associated with

Rating

Needleless hypodermic injection device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Needleless hypodermic injection device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Needleless hypodermic injection device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-872988