Pumps – Motor driven – Fluid motor
Patent
1986-06-19
1987-08-18
Freeh, William L.
Pumps
Motor driven
Fluid motor
417389, 417390, 417374, 623 3, F04B 912, F04B 908
Patent
active
046874240
ABSTRACT:
A redundant, pneumatic driver for a blood pump in which a pair of pistons are contained in a common cylinder and their stroke rates and lengths are selectively controlled by a controller which non-invasively senses the circulatory system requirements of the patient in which the blood pump is implanted. The controller varies the stroke rates and lengths to meet such requirements and further is able to selectively switch driving functions from one piston to the other to provide a redundant driving capability.
REFERENCES:
patent: 118206 (1871-08-01), Crowell
patent: 683143 (1901-09-01), Rhoades
patent: 1782975 (1930-11-01), Schaer
patent: 3323461 (1967-06-01), Bennett
patent: 3327322 (1967-06-01), Norton
patent: 3783453 (1974-01-01), Bolie
patent: 4465063 (1984-08-01), Nielsen
patent: 4559648 (1985-12-01), Mohnhaupt
patent: 4624625 (1986-11-01), Schrenker
Biomedizinische Technik, vol. 24, No. 6, Jun. 1979, pp. 134-139, H. Thomas et al., "Ein ausfallsicheres Antriebssystem fur Blutpumpen".
The International Journal of Artificial Organs, vol. 5, No. 3, 1982, pp. 157-159, H. P. Heimes et al., "Completely Integrated Wearable TAH-Drive Unit".
Forschungsgesellschaft Fuer Biomedizinische Technik E.V.
Freeh William L.
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