Shape memory alloy wire driven positive displacement micropump with pulsatile output
US8574215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2007 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Oct 13, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2251/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatuses and methods for pumping fluid are disclosed. An exemplary apparatus is a miniature pump that includes a shape memory wire that obtains a plastic condition below a transformation temperature and has a memorized shape such that the shape memory wire produces a work stroke by returning to the memorize shape at least at the transformation temperature. A spring biased against the shape memory wire is deflected by the work stroke to deform the shape memory wire from the memorized shape below the transformation temperature. A fluid pump is coupled to the shape memory wire and driven by the biased spring and shape memory wire to produce a fluid flow. The miniature pump can be incorporated into a self-contained infusion device in the form of a compact self-adhesive patch including a fluid reservoir, control electronics and power supply that is place directly at the infusion site of a user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.