Visual pressure monitor for respiratory breathing apparatus

Details Visual pressure monitor for respiratory breathing apparatus Visual pressure monitor for respiratory breathing apparatus

1987-05-12

1988-11-29

King, Lloyd L.

Undertaking

73715, 73730, 128716, A63B 2300

Patent

active

047876271

ABSTRACT:
An apparatus to visually and instantaneously indicate the pressure at the mouthpiece of a respiratory apparatus. The apparatus comprises a rigid tube with an aperture formed in the tube wall. Over the tube and covering the aperture is a flexible membrane which will deflect when the internal pressure differs from the external pressure. Mounted in communication with the flexible membrane is a pointer mechanism which provides a visual indication of the magnitude of the deflection of the flexible membrane.

REFERENCES:
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patent: 2503372 (1950-04-01), Bagley
patent: 3826247 (1974-07-01), Ruskin et al.
patent: 3958565 (1976-05-01), Wright
patent: 4041935 (1977-08-01), Garbe
patent: 4171804 (1979-10-01), Thead, Jr.
patent: 4233990 (1980-11-01), Yardley
patent: 4284083 (1981-08-01), Lester
patent: 4441506 (1984-04-01), McCombs et al.
patent: 4499905 (1985-02-01), Greenberg et al.
patent: 4638812 (1987-01-01), Hakkinen

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