Manometer CO2 detector combination
US6709403B1 · kind B1 · utility
23Cited by
14References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 2003 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jan 7, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/432
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A top and bottom housing joined together have a patient port and ventilation port in axial alignment. The top housing contains dry indicator paper for changing color in response to the presence of CO2. In addition, a shaft having a pointer on a top portion rotates in response to air in the housing to indicate pressure. A helical outer wall of the shaft engages a notch in a hollow stem attached to a membrane in the lower housing so the shaft rotates in response to air pressure on the membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.