Pressure fault device

Details Pressure fault device Pressure fault device

2006-06-13

2006-06-13

Fuller, Benjamin (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S728000, C073S744000, C137S554000

Reexamination Certificate

active

07059194

ABSTRACT:
The invention involves a pressure fault device for indicating a threshold pressure or a threshold differential pressure. The present invention provides a cost effective way to determine where a pressure problem has occurred. The device includes a housing having at least one inlet aperture and an indicator aperture and having first and second bores in fluid communication respectively with one inlet aperture and the indicator aperture. The device further includes a magnetic piston which is biased in the first bore toward one inlet aperture and moveable a predetermined distance in another direction in the first bore in response to inlet threshold pressure. The device further includes a magnetic responder which is moveable toward the indicator aperture in the second bore in response to movement of the magnetic piston. The device further includes a latching plate in magnetic relationship to the magnetic responder when the piston moves the predetermined distance. An indicator is disposed in the second bore and partially extends through the indicator aperture. At a threshold pressure or differential pressure, the magnetic responder responds to movement of the magnetic piston and latches onto the latching plate, thrusting the indicator partially through the indicator aperture to indicate a threshold has been reached. The configuration of the magnetic piston and the magnetic responder prevents the magnetic responder from being dislodged from the latching plate, even when the threshold is removed and the magnetic piston returns to its initial position. The magnetic responder can be manually reset when the threshold pressure is removed.

REFERENCES:
patent: 3568625 (1971-03-01), Cilento
patent: 4347744 (1982-09-01), Buchanan
patent: 4654140 (1987-03-01), Chen
patent: 4729339 (1988-03-01), Whiting
patent: 4792113 (1988-12-01), Eidsmore
patent: 0 273 358 (1987-12-01), None
patent: 04148055 (1992-05-01), None

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