Vented filter spigot for intravenous liquid administration apparatus
US4326957A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1979 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Feb 2, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/7536
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vented filter spigot for gravity feed intravenous liquid administration is provided having a filter spigot housing; a filter chamber in the housing; an inlet and an outlet in the housing, the housing being arranged to have the inlet oriented up and the outlet oriented down when installed for liquid feed from a liquid supply for intravenous administration; the inlet being shaped for attachment to a supply of liquid in a container for intravenous administration, and the outlet being shaped for attachment to an intravenous liquid administration apparatus; a liquid-permeable filter that is gas-impermeable when wet disposed in the filter chamber in a manner so as to extend generally vertically when the inlet is oriented up, and across the line of fluid flow through the chamber from the inlet to the outlet so that all through flow must pass through the filter; and dividing the chamber into two generally vertically-extending portions, one upstream and one downstream of the filter; a vent in an uppermost portion of the housing when the inlet is oriented up in flow communication with the upstream portion of the filter chamber; and a liquid-impermeable gas permeable filter disposed across …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.