Pressure gage and switch

Details Pressure gage and switch Pressure gage and switch

2006-01-03

2006-01-03

Oen, William (Department: 2855)

Measuring and testing

Fluid pressure gauge

Bourdon

Reexamination Certificate

active

06981421

ABSTRACT:
A pressure gage adapted to provide a mechanical indication of a sensed pressure and to provide an electrical signal indicative of the sensed pressure. The pressure gage includes a housing having a first fluid pressure chamber, a second fluid pressure chamber, and flexible diaphragm separating the first fluid pressure chamber from the second fluid pressure chamber. A magnet is coupled to the diaphragm such that movement of the diaphragm causes a related movement of the magnet. A helix is located adjacent to the magnet and a pointer is attached to the helix for conjoint rotation with a helix about a rotational axis. A Hall effect sensor is also located adjacent the magnet. Movement of the magnet in response to movement of the diaphragm rotates the helix and the pointer to provide a mechanical indication of the pressure sensed by the diaphragm, and the movement of the magnet causes the Hall effect sensor to generate an electrical signal indicative of the pressure sensed by the diaphragm.

REFERENCES:
patent: 4347744 (1982-09-01), Buchanan
patent: 4667514 (1987-05-01), Baer
patent: 6089098 (2000-07-01), Tylisz et al.
patent: 6510741 (2003-01-01), Condrea et al.
patent: 6854335 (2005-02-01), Burns

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