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US 4,381,680 AGranted
Mass flow meter
AssigneeSt Lab., Inc.
InventorTakeshi Shiota
Life of this patent
Estimating the term…
Abstract
In a mass flow meter having a "U" shaped conduit through which a fluid to be measured flows and oscillation means therefor to cause the "U" shaped conduit to produce a torsional moment due to the Coriolis force, a torque beam on which strain gages are mounted is fixed between both legs of the "U" shaped conduit to detect the torsional moment as an electric quantity.
Claims5
A mass flow meter comprising:
- a base;
- a "U" shaped conduit having two legs with each leg terminating in an end and through which a fluid to be measured flows, both ends of said "U" shaped conduit being fixed to said base;
- a supporting beam, one end thereof being provided with an electromagnet and the other end thereof being fixed to said base, the beam and the conduit being positioned on the base and with respect to one another so that they form a tuning fork structure with the "U" shaped conduit being oscillated at a natural frequency of said tuning fork structure;
- and
- a torque beam fixed between the two legs of said "U" shaped conduit, at least one strain gauge mounted on the torque beam, said at least one strain gauge being electrically responsive to the torque transmitted to said torque beam from said "U" shaped conduit to measure the amount of torque moment.
2 more elements
Dependencies are inferred from the claim text.