Blood collection bag weighing device

Details Blood collection bag weighing device Blood collection bag weighing device

1981-10-26

1983-04-05

Miller, Jr., George H.

Weighing scales

Weigher responsive material control

Feed

177229, 177245, G01G 1302, G01G 308, G01G 2300

Patent

active

043788548

ABSTRACT:
A blood collection bag is suspended from a leaf spring, which leaf spring, on being repositioned a specified distance by the weight of a properly filled blood collection bag, energizes an electrical circuit. The electrical circuit generates a pulse to momentarily energize a coil in proximity to a permanent magnet and momentarily disrupt the magnetic field of the magnet. A clamp for terminating the flow of blood to the blood collection bag is actuated upon the disruption of the magnetic field.

REFERENCES:
patent: 3698494 (1972-10-01), Gaudin
patent: 3924700 (1975-12-01), Lindsey et al.
patent: 4027735 (1977-06-01), Floyd

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