Rotary seal for cantilevered rotor pump and methods for axial flow blood pumping
US10857273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2017 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Aug 4, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M60/827
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Blood pump devices having improved rotary seals for sealing a bearing assembly supporting a rotor provided herein. Such rotary seals are particularly suited for use in blood pump devices that include rotors having cantilevered supported through a sealed mechanical bearing disposed outside a blood flow path of the device to avoid thrombus formation caused by blood contact with the bearing. The rotary seal can include a first and second face seal that are preloaded with a deflectable compliance member incorporated into the pump housing or a pair of magnets. Such rotary seals can instead or further utilize tight fitment between components or a bio-absorbable fill material to seal an interface between the rotor shaft and pump housing to seal the bearing assembly from fluid flowing through the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.