Magnetically actuated positive displacement pump

Details Magnetically actuated positive displacement pump Magnetically actuated positive displacement pump

1991-01-28

1994-04-12

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

H01F 700

Patent

active

053029291

ABSTRACT:
A positive displacement pump is provided which is especially suited to be used as a left ventricle assist device (LVAD). The pump is electromagnetically actuated. An electromagnet produces a pulse which repels a magnet mounted in a diaphragm which forms one wall of a pumping chamber. The pumping chamber thereby constricts and fluid is expelled. The electromagnet has a reverse taper core and core cup magnet which produce a bipolar field effect upon a diaphragm magnet to cause the return of the diaphragm to its starting position, without the application of external power.

REFERENCES:
patent: 3305209 (1967-02-01), Bender et al.
patent: 4129187 (1978-12-01), Wengryn et al.
patent: 4310143 (1982-01-01), Determan
patent: 4422060 (1983-12-01), Matsumoto
patent: 4506701 (1985-03-01), Masaki et al.
patent: 4524797 (1985-06-01), Lungu
patent: 4532951 (1985-08-01), Fermanich
patent: 4550302 (1985-10-01), Watanabe
patent: 4559971 (1985-12-01), Bradshaw
patent: 4564046 (1986-01-01), Lungu
patent: 4750705 (1988-06-01), Zippe
patent: 4751487 (1988-06-01), Green, Jr.
patent: 5092879 (1992-03-01), Jarvik

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