Compression gauge

Details Compression gauge Compression gauge

2006-10-18

2008-09-30

Noori, Max (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

Reexamination Certificate

active

07428845

ABSTRACT:
A compression gauge for measuring the compression applied to a test bolt. The compression gauge includes a passive hydraulic cylinder and a piston slidably disposed within the cylinder. The piston and the cylinder define an hydraulic chamber. A threaded test bolt passes through the piston and cylinder to engage a female receiver on the opposite side of the compression gauge. Tightening the test bolt will cause the bolt to compress the piston and cylinder which will pressurize the hydraulic chamber. A pressure gauge measures the pressure achieved in the hydraulic chamber. This pressure can be easily converted to compressive force. When a hydraulic wrench is used to tighten the test bolt, the wrench can be set to apply the same amount of torque to a workpiece bolt and thus apply the desired amount of compression to the workpiece bolt.

REFERENCES:
patent: 4044834 (1977-08-01), Perkins
patent: 4322193 (1982-03-01), Stahl
patent: 4558599 (1985-12-01), Sachs
patent: 6925807 (2005-08-01), Jones et al.
patent: 7216531 (2007-05-01), Young et al.

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