Implantable pump

Details Implantable pump Implantable pump

1984-10-17

1985-12-10

Croyle, Carlton R.

Pumps

Motor driven

Electric or magnetic motor

92 92, 128 1D, 128DIG3, 623 3, F04B 4300, F01B 1900, F16J 300

Patent

active

045576734

ABSTRACT:
A chamber structure in a blood pump or the like is described. The structure includes a deformable sac having an annular side wall which is held in a rigid condition, and a pair of opposed circular walls, each joined to the annular side wall through a flexible annular wall portion. A circular pusher plate acting against each circular wall has an initial deflection position at which the associated flexible wall portion in the sac takes the form of a circumferentially uniform roll having an outwardly convex, bulged cross sectional curvature. The rolls in the sac maintain their circumferentially uniform, bulge-like character as the pusher plates are moved toward inwardly moved positions.

REFERENCES:
patent: 1893776 (1933-01-01), Hull
patent: 2846983 (1958-08-01), Otto
patent: 2950739 (1960-08-01), Lofink
patent: 4167046 (1979-09-01), Portner et al.
patent: 4384829 (1983-05-01), Conley et al.

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