Aspirating syringe

Details Aspirating syringe Aspirating syringe

1994-01-27

1995-03-07

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, 128763, A61M 500

Patent

active

053953452

ABSTRACT:
The invention features an aspirating syringe which includes a plastic syringe barrel having an exterior wall and an inner surface, and leading and trailing ends. The inner surface and ends define a hollow interior chamber and a predetermined volume. The leading end of the barrel has an opening extending through a hub and the trailing end terminates at an outer rim. The syringe also includes a plastic plunger slidingly operative in the barrel. The leading, i.e., sealing, end of the plunger helps to define the hollow interior chamber and the predetermined volume. The plunger extends longitudinally within and beyond the barrel trailing end and is movable in the barrel inwardly toward the leading end and outwardly away from the leading end, thereby varying the predetermined volume of and pressure within the barrel interior chamber. The plunger also has a sealing end receivable inside the barrel to substantially seal the hollow interior chamber and a thumb-receiving end outside the barrel. The syringe includes a finger grip member extending perpendicular from the barrel trailing end. An outward biasing means is coiled around the plunger between the barrel trailing end and the plunger thumb-receiving end to bias the plunger outwardly from the syringe barrel upon advancement of the plunger into the barrel.

REFERENCES:
patent: 4121739 (1978-10-01), Devaney et al.
patent: 4664128 (1987-05-01), Lee
patent: 4997423 (1991-03-01), Okuda et al.

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