Sliding stopper for a syringe

Details Sliding stopper for a syringe Sliding stopper for a syringe

1989-03-14

1991-04-23

Rosenbaum, C. Fred

Surgery

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

Treating material introduced into or removed from body...

A61M 5315

Patent

active

050096460

ABSTRACT:
A sliding stopper for a syringe, consisting of a rubber elastic body having the part to be contacted with a liquid medicament and the part sliding on the inner wall of a barrel fully laminated with a film of tetrafluoroethylene resin, ethylenetetrafluoroethylene resin or ultra-high molecular weight polyethylene resin, and having an excellent liquid tightness and gas tightness. The ratio of the length (Y) of the surface of the outer circumferential part of the sliding stopper contacting the inner wall of the barrel to the length (L) of the sliding part of the sliding stopper, i.e. Y/L is in the range of 0.80 to 1.00, and the ratio of the length (L) of the sliding part to the outer diameter (D) of the sliding stopper, i.e. L/D is in the range of 0.25 to 1.00.

REFERENCES:
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patent: 2895773 (1959-07-01), McConnaughey
patent: 3050059 (1962-08-01), Wall et al.
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patent: 3766918 (1973-10-01), Kessel
patent: 3998224 (1976-12-01), Chiquiar-Arias
patent: 4303070 (1981-12-01), Ichikawa et al.
patent: 4501192 (1985-02-01), Knodel
patent: 4685910 (1987-08-01), Schweizer
patent: 4820278 (1989-04-01), Balisky

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