Alternating pump gaps
US11781551B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2021 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Jun 7, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3334
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A blood pump system includes a pump housing and an impeller for rotating in a pump chamber within the housing. The impeller has a first side and a second side opposite the first side. The system includes a stator having drive coils for applying a torque to the impeller and at least one bearing mechanism for suspending the impeller within the pump chamber. The system includes a position control mechanism for moving the impeller in an axial direction within the pump chamber to adjust a size of a first gap and a size of a second gap, thereby controlling a washout rate at each of the first gap and the second gap. The first gap is defined by a distance between the first side and the housing and the second gap is defined by a distance between the second side and the pump housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.