Intravenous metering device
US4453931A · kind A · utility
81Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1981 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Jun 30, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/14224
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for precise metering of liquids for intravenous delivery to a patient, the device including a pumping chamber with a reciprocable diaphragm positioned therein. The device also includes valves positioned at the pumping chamber inlet and outlet, the valve at the pumping chamber inlet being operated independently of the pressure within the pumping chamber. The device also includes a gas retention chamber having an upper portion providing for the formation of the gas-liquid interface and a lower portion from which liquid free of gas bubbles may be removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.