Reducing cylinder wear in a drug pump
US7798789B2 · kind B2 · utility
2Cited by
20References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2007 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Feb 11, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/106
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to a method and related apparatus for rotating a piston of a drug pump during the pumping stroke to reduce drug pump wear. The actuator may move a piston that pumps fluid through a pumping channel. In the present invention, the armature includes one or more openings or shapes that cause the actuator, including the armature and the piston, to rotate about a longitudinal axis of the piston during the pumping stroke. Rotation of the actuator member may help to reduce wear to the actuator member and the pump itself caused by repetitive pumping motions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.