Quantity indicating injection device

Details Quantity indicating injection device Quantity indicating injection device

1974-12-10

1976-03-02

Medbery, Aldrich F.

Surgery

Respiratory method or device

Ozone or ion generation

128272, 128218P, 128218PA, 128215, 222309, 222137, A61J 100, A61M 5315

Patent

active

039411290

ABSTRACT:
A cartridge or injecting device for storing and dispensing medical solutions, such cartridge being characterized by a tubular member with a needle on one end having an opening therethrough communicating with the interior of the tubular member. A slidable drive stopper in the other end of the tubular member has thereon an elongated plunger for advancing and retracting the drive stopper. A non-retractable stopper in the tubular member, in contact with the forward end of the drive stopper, has therethrough a longitudinal opening. The non-retractable stopper is therefore shifted forwardly when the drive stopper is advanced thus serving as a visual indicator showing that medical solution has been ejected from the cartridge.

REFERENCES:
patent: 2591706 (1952-04-01), Lockhart
patent: 2665687 (1954-01-01), Brown
patent: 3248014 (1966-04-01), Gill
patent: 3259130 (1966-07-01), Kauthamer
patent: 3359979 (1967-12-01), Murdoch
patent: 3618603 (1971-11-01), Levenson

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