Pump apparatus for biomedical use
US5205819A · kind A · utility
258Cited by
26References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | Dec 30, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/0244
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An infusion pump includes a piezoelectric actuator located in a housing and operable to deflect a flexible wall of a detachable pump body. The pump body defines a chamber of variable volume with non-return inlet and outlet valves. The pump body is disposable and connected to the housing by a releasable connector which biases the wall into operative engagement with the transducer. The transducer is provided with sense electrodes to measure the amplitude of deflection which is used to trigger alarms indicating the presence of bubbles in the chamber or of occlusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.