Measuring and testing – Fluid pressure gauge – Bourdon
Reexamination Certificate
2010-02-26
2011-12-06
Allen, Andre (Department: 2855)
Measuring and testing
Fluid pressure gauge
Bourdon
C073S733000
Reexamination Certificate
active
08069731
ABSTRACT:
A service gauge for determining refrigerant pressure and the saturated vapor equivalent temperature, or other parameters, for a refrigerant in an HVAC system. In one embodiment, the service gauge employs a bourdon tube with at least one attached strain gauge to sense the refrigerant pressure and produce an electronic pressure signal. In another embodiment, a magnet and rotary position sensor produces an electronic signal proportional to the refrigerant pressure. The electronic pressure signal from the output of the strain gauge or the rotary position sensor is connected to a microprocessor, which calculates and displays the refrigerant pressure, the saturated vapor equivalent temperature for a variety of refrigerants, produces instantaneous and time lapsed representations of those parameters, and other parameters of the refrigerant.
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Allen Andre
Diversitech Corporation
Smith , Gambrell & Russell, LLP
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