Purge flow control in rotary blood pumps

Details Purge flow control in rotary blood pumps Purge flow control in rotary blood pumps

1990-01-11

1992-06-02

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

415900, 415110, 277 13, 277 53, 600 16, 604151, F04B 3504

Patent

active

051182645

ABSTRACT:
A blood pump includes a housing an inlet and outlet communicating with a pump chamber. A rotor received in the pump chamber is rotated by a drive motor. A drive shaft extending between the motor and rotor passes through a seal which is purged from the non-blood side by fluid. The fluid side of the seal contains a pumping element to modulate the fluid pressure, thereby controlling the purge fluid flow.

REFERENCES:
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patent: 4704121 (1987-11-01), Moise
patent: 4854820 (1989-08-01), Zolotar et al.
patent: 4927407 (1990-05-01), Dorman

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