Device for administering liquid
US4898581A · kind A · utility
30Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1989 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Jun 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/789
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for administering liquid in a device for the parenteral administration of liquid, comprising a pump which conveys the liquid through an elastic tube to the patient, the entry of air into the tube is prevented by the provision of a valve (20) in the tube downstream of the pump. This valve opens in the patient's direction under a pressure of such magnitude that the pressure inside the tube upstream of the valve is at least approximately as great as the external air pressure. The check valve provided may be used together with a pump as well as under mere gravity feeding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.