Syringe with pressure-limited delivery

Details Syringe with pressure-limited delivery Syringe with pressure-limited delivery

1979-11-05

1981-06-30

Yasko, John D.

Surgery

Respiratory method or device

Ozone or ion generation

128215, A61M 100

Patent

active

042757304

ABSTRACT:
A syringe with pressure-limited delivery capacity includes a barrel having a chamber for retaining fluid and a passageway through the distal end of the barrel communicating with the chamber for delivering fluid to a fluid receiving device. A plunger is slidably positioned in fluid-tight engagement inside the barrel and is adapted to force fluid from the chamber through the passageway upon its distally directed movement. A hollow fluid by-pass is connected to the barrel near its distal end with the lumen of the by-pass communicating with the chamber in a permanently open condition. The opposite end of the by-pass is adapted to vent to atmospheric pressure level conditions. The flow resistance of the by-pass is selected so as to pre-determine the pressure level inside the chamber required for fluid to flow out of the opposite end of the by-pass upon distal movement of the plunger.

REFERENCES:
patent: 3978846 (1976-09-01), Bailey

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