Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Corporeal artificial heart – heart assist – control...
Patent
1988-05-09
1990-07-31
Green, Randall L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Corporeal artificial heart, heart assist , control...
417356, 416111, A61M 110
Patent
active
049447483
ABSTRACT:
The impellor of a blood pump is supported by permanent magnets on the impellor and pump housing and stabilized by an electromagnet on the housing. A control circuit supplies current to the electromagnet to maintain the axial position of the impellor at a control position in which the impellor is in mechanical equilibrium under permanent magnet forces and static axial forces on the impellor to minimize energy consumption in the support of the impellor. The impellor is rotated magnetically and stator coils in the housing are supplied with electric currents having a frequency and amplitude adjusted in relation to blood pressure at the pump inlet to match the flow characteristics of the pump to physiological characteristics of the natural heart. A cavity is formed in the impellor to match the average specific gravity of the impellor and portions of the suspension and drive systems thereon to the specific gravity of blood to further minimize power consumption by the pump. A valve member can be formed on the impellor to mate with a restriction in the pump inlet for pumps used to assist the pumping action of the natural heart.
REFERENCES:
patent: Re27849 (1973-12-01), Wortman
patent: 1105967 (1914-08-01), Davidson
patent: 1711045 (1929-04-01), Davis
patent: 2263515 (1941-11-01), Pezzillo
patent: 2319730 (1943-05-01), Garraway
patent: 2500400 (1950-03-01), Cogswell
patent: 2535695 (1950-12-01), Pezzillo, Jr.
patent: 2827856 (1958-03-01), Zozulin
patent: 3194165 (1965-07-01), Sorlin
patent: 3433163 (1969-03-01), Sheets
patent: 3647324 (1972-03-01), Rafferty et al.
patent: 3846050 (1974-11-01), Laing
patent: 3938913 (1976-02-01), Isenberg et al.
patent: 3957389 (1976-05-01), Rafferty et al.
patent: 3970408 (1976-07-01), Rafferty et al.
patent: 4173796 (1979-11-01), Jarvik
patent: 4213207 (1980-07-01), Wilson
patent: 4382199 (1983-05-01), Isaacson
patent: 4518317 (1985-05-01), Inoue
patent: 4523896 (1985-06-01), Lhenry et al.
patent: 4688998 (1987-08-01), Olsen et al.
"An Instrumental Approach to In Vivo Hemocompatibility Assessment: Development of the Intravascular Magnetic Suspension of A Test Device", by D. M. Lederman, R. D. Cumming, H. E. Petschek, T. H. Chiu, E. Nyilas, and E. W. Salzman, vol. 283, pp. 524-535, Feb. 10, 1977, 24894.
Bramm Gunter W.
Olsen Don B.
Green Randall L.
Iantorno Stephanie L.
LandOfFree
Magnetically suspended and rotated rotor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetically suspended and rotated rotor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetically suspended and rotated rotor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1396568