Disposable manometer for use with a CPR bag

Details Disposable manometer for use with a CPR bag Disposable manometer for use with a CPR bag

1995-11-09

1996-09-17

Chilcot, Richard

Measuring and testing

Fluid pressure gauge

Diaphragm

73756, 12820423, 12820523, 128675, 128748, G01L 708

Patent

active

055570496

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.

REFERENCES:
patent: 2271268 (1942-01-01), Longstreet
patent: 3975959 (1976-08-01), Larkin
patent: 4020784 (1977-05-01), Greene
patent: 4347744 (1982-09-01), Buchanan
patent: 4433579 (1984-02-01), Horn
patent: 4821713 (1989-04-01), Bauman
patent: 5140982 (1992-08-01), Bauman
patent: 5357951 (1994-10-01), Ratner

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