Occlusion detection techniques for a fluid infusion device having a rotary pump mechanism and sensor contact elements
US9987425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2015 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Jun 22, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/502
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A fluid infusion device includes a pump mechanism having a rotor and a stator. The rotor includes a reference surface and a cam element rising from the reference surface. The stator includes a cam element with a stator cam surface. The cam elements cooperate to axially displace the rotor as it rotates. A drive motor is coupled to actuate the rotor to pump medication fluid from a fluid cartridge module to a body, via a subcutaneous conduit. A sensor contact element resides on the reference surface in an area unoccupied by the rotor cam element. A sensing element terminates at the stator cam surface, and cooperates with a detection circuit to detect when the stator cam surface contacts the sensor contact element. The circuit monitors a detection signal obtained from the sensing element to determine an operating condition of the pump mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.