Fluid delivery mechanism having a flush-back operation
US6585499B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Aug 31, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/503
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides an infusion pump 10 for providing a flow of a liquid through an tube 28. The infusion pump 10 includes at least two occluders 152, 162 having an open position and a closed position for releasably pinching-off the tube 28. A metering chamber is disposed between the two occluders 152, 162. A first plunger 72 and a second plunger 73 are provided, each plunger 72, 73 having an open position and a closed position for releasably compressing the metering chamber. In the method of the present invention, an occluder 152 releasably pinches-off the tube near the source of the liquid at a first location. The second occluder 162 releasably pinches-off the tube at a second location that is downstream from the source of the liquid 23 and the first location. The tube 28 is released at the first location and a plunger 72 compresses the tube 28 between the first location and the second location, thereby generating a flow of the liquid through the tube 28 in a direction towards the source of liquid 23.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.