Syringe

Surgery – Respiratory method or device – Ozone or ion generation

Patent

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Details

128234, A61M 500

Patent

active

040304981

ABSTRACT:
A contamination resistant syringe is provided in which two sealing rings are axially spaced from each other. The sealing rings are prevented from sweeping the same area and there is no communication between the chamber defined by the two sealing rings and the discharge area forward of the inner sealing ring. In this manner, contamination which might enter from the rear of the barrel will be prevented from contact with the inner ssealing ring.

REFERENCES:
patent: 766121 (1904-07-01), Stearns
patent: 786697 (1905-04-01), Wackenhuth
patent: 788059 (1905-04-01), McElroy
patent: 1771219 (1930-07-01), Hein
patent: 2688325 (1954-09-01), Lockhart
patent: 2771880 (1956-11-01), Gotthart
patent: 2842127 (1958-07-01), Everett
patent: 2896621 (1959-07-01), Rodrigues
patent: 2902035 (1959-09-01), Hartley
patent: 3255752 (1966-06-01), Dick

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