Apparatus for measuring pull-out resistance

Details Apparatus for measuring pull-out resistance Apparatus for measuring pull-out resistance

1986-05-05

1987-05-05

Levy, Stewart J.

Measuring and testing

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

By loading of specimen

73826, G01N 308

Patent

active

046622276

ABSTRACT:
A testing apparatus for measuring the pull-out resistance of fasteners. The apparatus includes a disc rotatably supported by a base. The disc has a bearing surface with a uniform radius. A flexible strap is fixed to the disc so that the strap is carried by the bearing surface as the disc rotates. A torque wrench is used to rotate the disc. The length of the constant radius and the flexible nature of the strap create a constant moment arm, making the torque measured by the wrench directly convertible to pull-out load.

REFERENCES:
patent: 2780068 (1957-02-01), Grimes
patent: 3595072 (1971-07-01), Richards
patent: 3667288 (1972-06-01), Hargreaves
patent: 3690160 (1972-09-01), Kriesten

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