Blood collection bag weighing device

Details Blood collection bag weighing device Blood collection bag weighing device

1981-11-09

1983-06-28

Miller, Jr., George H.

Weighing scales

Weigher responsive material control

Feed

177 68, 177 79, 177DIG5, G01G 1302

Patent

active

043900739

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 on release of a weight retained by the magnetic field of the magnet, which release is achieved by the disruption of the magnetic field on energization of the coil.

REFERENCES:
patent: 3115152 (1963-12-01), Goldberg et al.
patent: 3287721 (1966-11-01), Baehr
patent: 3671893 (1972-06-01), Edgar
patent: 3698494 (1972-10-01), Gaudin
patent: 3924700 (1975-12-01), Lindsey et al.
patent: 3960224 (1976-06-01), Silvers
patent: 4027735 (1977-06-01), Floyd

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