Patent · US Active

Centrifugal blood pump impeller and flow path

US10030664B2 · kind B2 · utility

6Cited by

2References

12Claims

0Family size

Assignee

CH BIOMEDICAL (USA) INC. · US

Inventors

Frank Lin · Milpitas, US
Chen Chen · Lompoc, US

Key dates

Filing date	Aug 1, 2014
Grant date	Jul 24, 2018
Priority date	—
Expiry date	May 20, 2036

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M60/824
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

An impeller and rotor structure for a magnetically levitated pump define a smooth primary flow path and U-shaped secondary flow path, which extends around an annular magnetic rotor. The u-shaped secondary flow path is defined by a large outer side gap along an outer surface of the rotor, a large bottom gap along a bottom surface of the rotor and a large inner gap along an inner surface of the rotor. Shroudless impeller blades are purely radial and overhung from a thin peripheral ring attached to the annular magnetic rotor. A center post having a low aspect ratio extends through the annular rotor. The low aspect ratio is configured to prevent flow in the primary flow path from colliding directly with flow in the secondary flow path at the inner radial gap.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.