Ultrasonically actuated needle pump system
US6923790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Dec 11, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M37/0092
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonically driven pump, which may be used for sampling body fluids or atomizing liquids, has a stationary outer needle and an inner needle mounted within the bore of the outer needle. The distal end of the inner needle is positioned adjacent to the distal end of the outer needle. The inner needle is ultrasonically vibrated by an ultrasonic actuator without vibrating the outer needle, with resulting draw of liquid through the distal end of the outer needle into the bore of the inner needle for discharge through the proximal end of the inner needle. The outer needle can be formed to have a penetrating tip suited for penetrating the skin of a subject to allow sampling of body fluids including interstitial fluids. The pump can also be used for atomizing liquid, by drawing liquid from a supply that is pumped from the distal end to an open proximal end of the inner needle where the liquid is discharged by atomization into the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.