Apparatus for promoting waste-free primary flow in a patient monitoring device
US5231991A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1990 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Dec 21, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/4066
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for promoting waste-free primary flow in a patient monitoring device is disclosed and includes a waste trap with a body defining a waste chamber with the body including an entry port for communication with a primary channel of the device, and an exit port for communication with a secondary channel of the device. The exit port has a first cross-sectional area. The exit port is defined by a porous, gas-permeable, waste-blocking member that extends into the chamber to promote waste-free primary flow in any orientation of the trap. The member has a total-pore area exceeding the first cross-sectional area. Operatively connected between the ports is means for monitoring the differential pressure therebetween and for sending signals representative of such pressure to associated control circuitry of the device for determining the volume of waste in said body based on signals received from the monitoring means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.