Load indicator washer

Details Load indicator washer Load indicator washer

1977-12-01

1979-04-17

Holko, Thomas J.

F16B 3102

Patent

active

041494466

ABSTRACT:
A load indicator washer in the form of a parallelogram includes flat bearing surfaces on one of its faces, the bearing surfaces extend inwardly from two opposite ends of the washer, a slightly arcuate portion extends between and connects the bearing surfaces, a hole to receive a fastener extends through the washer at about the midpoint of the washer, and a conical portion symmetrically positioned about the hole, terminating short of the ends of the washer, and extending outwardly from the arcuate portion. The arcuate portion and the conical portion act as springs, deflect under a load, and thereby indicate such load. The load indicator washer is particularly adapted for use with a mine roof bolt.

REFERENCES:
patent: 1774695 (1930-09-01), Baynes
patent: 2850937 (1958-09-01), Ralston
patent: 2943528 (1960-07-01), Curry
patent: 3104645 (1963-09-01), Harrison
patent: 3150557 (1964-09-01), Brown
patent: 3169440 (1965-09-01), Taylor
patent: 3329058 (1967-07-01), Cumming
patent: 3332464 (1967-07-01), Castel

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