Pumps – Motor driven – Electric or magnetic motor
Patent
1993-01-21
1995-02-28
Bertsch, Richard A.
Pumps
Motor driven
Electric or magnetic motor
41742314, 417 53, 415206, 415900, F04B 1700
Patent
active
053932072
ABSTRACT:
A centrifugal blood pump features a pump assembly including a cylindrical barrel insertable into a motor stator. The barrel contains a motor rotor which is directly coupled to the pump's impeller. The barrel can be oriented and locked in the motor stator in many different angular orientations. Hemolysis is prevented in spite of high speed operation by reducing the clearance between the impeller and the impeller chamber, rounding the edges of the impeller blades, and providing a deflector to prevent blood from being impelled more than once around the impeller chamber periphery. An efficient releasable locking mechanism is also disclosed, as is a preferred method of assembling the pump assembly with close tolerances.
REFERENCES:
patent: 4213742 (1980-07-01), Henshaw
patent: 4826401 (1989-05-01), Clark et al.
patent: 4898518 (1990-02-01), Habbard et al.
patent: 5017103 (1991-05-01), Dahl
patent: 5145335 (1992-09-01), Abelen et al.
le Blanc Pieter W. C. J.
Maher Timothy R.
Taylor Lynn P.
Bertsch Richard A.
Nimbus Inc.
Weissenberger Harry G.
Wicker William J.
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