Heart assist device
US12076546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2023 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Jun 26, 2043 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M60/88
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A rotary pump housing having a cylindrical bore, a pumping chamber and a motor stator including an electrically conductive coil located within the housing and surrounding a portion of the cylindrical bore. A rotor has a cylindrical shaft with an impeller and one or of magnets located within the shaft that are responsive to the motor stator to drive actuation of the rotor. The housing bore is closely fitted to the outer surface of the shaft forming a hydrodynamic journal bearing with an annular clearance defining a leakage flow path. One or more of radial or axial thrust bearings may be provided to provide rotation stability to the rotor and flow within the leakage flow path. The relative orientation of positions of the inflow, outflow, and leakage flow paths may be varied within the pump, such as to accommodate different intended methods for implantation and/or use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.