Syringe device with means for removing contaminates when drawing

Details Syringe device with means for removing contaminates when drawing Syringe device with means for removing contaminates when drawing

1975-01-15

1976-06-01

Howell, Kyle L.

Surgery

Truss

Perineal

128DIG5, 128218P, 128220, A61B 514

Patent

active

039601390

ABSTRACT:
A syringe for taking blood samples includes a tubular body having a main plunger slidably received therein in fluid tight relationship. The tubular body has an opening through the leading end in communication with connection means for receiving a hypodermic needle or the like. The main plunger has a passage there-through in communication with the opening in the leading end of the tubular body and an auxiliary plunger is slidably received in said passage to assist in initially drawing blood into said passage to purge gaseous materials from the opening in the leading end of the tubular body before blood is allowed to flow into the internal chamber of the tubular body.

REFERENCES:
patent: 2515956 (1950-07-01), Greenberg
patent: 3660033 (1972-05-01), Schwartz
patent: 3660037 (1972-05-01), Sokol
patent: 3701434 (1972-10-01), Moore
patent: 3734079 (1973-05-01), Weber
patent: 3748909 (1973-07-01), Kuo
patent: 3809298 (1974-05-01), Harris et al.
patent: 3814079 (1974-06-01), LeRoy
patent: 3835835 (1974-09-01), Thompson et al.

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