Disposable manometer for use with a CPR bag
US5557049A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Nov 9, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/0078
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A disposable manometer includes a chamber connectable to a source of CPR air pressure via a patient breathing valve and an elongated restricted passageway. The manometer includes a dial and a pointer rotatably disposed with respect to the dial to indicate the pressure sensed within a manometer chamber. The pointer has an actuator stem with a spiral-shaped protrusion coupled to a groove within an opening of a stem coupling attached at the center of a diaphragm forming one wall of the manometer chamber. Responsive to pressurized air entering the manometer chamber, the diaphragm reciprocates against the force of a biasing spring moving the stem coupling with respect to the actuator stem for the pointer so that the interaction between the spiral-shaped protrusion and the groove causes rotation of the pointer to indicate the pressure within the manometer chamber. The disposable manometer is intended to be used with a CPR bag or a patient breathing tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.