Torque indicator

Details Torque indicator Torque indicator

1993-04-26

1995-07-18

Chilcot, Jr., Richard E.

Measuring and testing

Dynamometers

Responsive to torque

7386237, 73744, G01L 302

Patent

active

054331196

ABSTRACT:
A torque indicator system for use while rotating a screw pile into the ground with a positive displacement hydraulic motor, includes first and second hydraulic cylinders having their rods connected together in a manner such that net pressure forces are created in response to the high inlet and low outlet pressures of the motor. A pressure gauge mounted on one of the cylinder assemblies reads the working pressure drop across the motor, which is directly related to its output torque.

REFERENCES:
patent: 638052 (1899-11-01), Heintz
patent: 1869513 (1932-08-01), Seewald et al.
patent: 2322182 (1943-06-01), Walker
patent: 2398167 (1946-04-01), Walker
patent: 2517038 (1950-08-01), Sheffield
patent: 2709071 (1955-05-01), Hild
patent: 2775889 (1957-01-01), Decker
patent: 3581562 (1971-06-01), Shorrock
patent: 3664474 (1972-05-01), Blake et al.
patent: 4133206 (1979-01-01), Itida et al.
patent: 4791839 (1988-12-01), Bickford et al.
patent: 4823616 (1989-04-01), Tambini

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