Measuring and testing – Fluid pressure gauge – Mounting and connection
Patent
1979-06-11
1980-10-14
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Mounting and connection
73706, 73730, 128675, G01L 708
Patent
active
042274206
ABSTRACT:
The pressure monitoring assembly monitors changes in pressure of a fluid passing through the assembly. This is accomplished by passing a liquid through a pressure transfer device having first and second chambers therein separated by a flexible diaphragm. The first chamber has air therein and pressure changes are transmitted across the diaphragm from the second chamber through which the liquid flows. The assembly further includes a pressure transducer and a pressure coupling mechanism for coupling the pressure transfer device to the pressure transducer. The pressure coupling mechanism includes a body having a cylindrical chamber and a piston positioned for movement therein with a piston shaft protruding from a coupling end of the body. The shaft is biased outward from the coupling end of the body by a spring. The coupling end has an O ring seal which forms a seal with the pressure transfer device around an orifice in a wall of the second chamber when the pressure coupling mechanism is mounted to the pressure transfer device. The piston shaft has a through-bore to the cylindrical chamber so that air is trapped in an air passageway comprising the first chamber, the through-bore and the cylindrical chamber. As the pressure transfer device is latched to the pressure coupling mechanism, the shaft and piston are pushed against the spring toward the pressure transducer which is mounted to the body at one end of the cylindrical chamber thereby compressing the trapped air in the air passageway.
REFERENCES:
patent: 3142988 (1964-08-01), Love
patent: 3163529 (1964-12-01), Jewett
patent: 3418853 (1968-12-01), Curtis
patent: 3563095 (1971-02-01), Robinson, Jr.
patent: 3863504 (1975-02-01), Borsanyi
Baxter Travenol Laboratories Inc.
Collins Henry W.
Flattery Paul C.
Vigil Thomas R.
Woodiel Donald O.
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