Differential pressure sensor with read-out device
OwnerHyok S. Lewinventor
Life of this patent
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Abstract
A differential pressure sensor comprises a pair of bourdon tubes disposed in an arrangement wherein deflections of the two bourdon tubes resulting from fluid pressures connected thereto take place in two opposite directions and the deflective extremities of the two bourdon tubes are linked to one another by a linkage, which linkage is coupled to a transducer that converts the displacement of the linkage to an electrical parameter such as the ohmic resistance, capacitance, reluctance, or resonance frequency as a measure of differential values between two pressures respectively connected to the two bourdon tubes.
Claims6
A device for measuring differential pressure comprising in combination:
- a) a pair of curved tubings of identical geometry disposed on a hypothetical plane in a mirror image to one another, each of the pair of tubings including a first closed end and a second open end with means for connecting a conduit thereto, wherein the first closed ends are spaced from one another and the second open ends are anchored to a support member;
- b) a rigid coupling member with first extremity connected to the first closed end of one of the pair of curved tubings in a pivotable arrangement about an axis generally perpendicular to said hypothetical plane and second extremity connected to the first closed end of the other of the pair of curved tubings in a pivotable arrangement about an axis generally perpendicular to said hypothetical plane, said rigid coupling member including an extension extending in a direction generally perpendicular to a line connecting the two first closed ends of the pair of curved tubings and generally parallel to said hypothetical plane, wherein the rigid coupling member is substantially free of any constraint limiting displacement thereof;
- and
- c) means for determining position of said extension of the rigid coupling member as a measure of difference between two pressures respectively contained in the pair of curved tubings.
Dependencies are inferred from the claim text.