Pressure sensor
AssigneeUnited Technologies Corporation
InventorsDonald Preston, Robert G. Yeaton
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Abstract
Fatigue fractures in the bellows capsule of a bellows-type pressure sensor are prevented by wrapping the capsule with a vibration damping material such as an open cell polyurethane foam saturated with a fluid. In the preferred embodiment, wherein the sensor is employed in a gas turbine engine fuel control, the fluid may conveniently comprise liquid jet engine fuel.
Claims5
A pressure sensor comprising a housing, a bellows disposed within said casing and sealed thereto, said bellows being responsive to the pressure of a fluid within said housing to cause displacement of said bellows, said pressure sensor being characterized by a wrapping of vibration damping material disposed about the major surface of said bellows, said wrapping being saturated with said fluid, said saturated wrapping serving to minimize fatigue fractures of said bellows by damping vibration of said bellows at the natural frequency thereof.
Dependencies are inferred from the claim text.