Quickly installed load measuring apparatus and associated system

Details Quickly installed load measuring apparatus and associated system Quickly installed load measuring apparatus and associated system

1988-03-15

1990-04-03

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

7386231, 7386238, 7386249, G01L 122, G01L 126

Patent

active

049129848

ABSTRACT:
A load measuring apparatus is, in preferred embodiments, preassembled in a ready-to-use, portable assembly and comprises a load bearing body providing a deformable link between a shaft housing (such as a valve operator) and a shaft which moves relative to the housing, and which deformable, load bearing body functions as the support for a shaft engaging element of the invented device; and also comprises strain gauges measuring the deformation of the load bearing body, which deformation is related to the thrust of the shaft; load measuring apparatus operating in association with a signal conditioning device and display/recording device by which measurements are conveyed and interpreted; in the preferred embodiment, the load measuring apparatus includes an overload shear washer incorporated to prevent damage to the shaft housing by shearing away and allowing continued, unblocked movement of the shaft.

REFERENCES:
patent: 2775887 (1957-01-01), Hines
patent: 3093578 (1963-06-01), Hofmeister
patent: 3199057 (1965-08-01), Gindes et al.
patent: 3213680 (1965-10-01), Schaefer
patent: 4570903 (1986-02-01), Crass
Wheatstone Bridge Nonlinearity TN-139, Micro-Measurements, 1974.

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