Load indicator washer
First Claim
1. A load indicator washer comprising(a) a plate having on one face thereof bearing surfaces extending inwardly from two opposite ends of said plate,(b) said bearing surfaces extending in substantially the same plane and adapted to bear against a generally planar surface,(c) an arcuate portion connecting said bearing surfaces,(d) a hole extending through said arcuate portion of said plate at approximately the intersection of the axes of said plate, and(e) a conical portion extending away from said one face and outwardly from said arcuate portion and symmetrically disposed about said hole whereby as a load is applied to the washer the arcuate portion first begins to straighten out and as the load is increased the conical portion deflects toward said one face.
2 Assignments
0 Petitions
Accused Products
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.
62 Citations
4 Claims
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1. A load indicator washer comprising
(a) a plate having on one face thereof bearing surfaces extending inwardly from two opposite ends of said plate, (b) said bearing surfaces extending in substantially the same plane and adapted to bear against a generally planar surface, (c) an arcuate portion connecting said bearing surfaces, (d) a hole extending through said arcuate portion of said plate at approximately the intersection of the axes of said plate, and (e) a conical portion extending away from said one face and outwardly from said arcuate portion and symmetrically disposed about said hole whereby as a load is applied to the washer the arcuate portion first begins to straighten out and as the load is increased the conical portion deflects toward said one face.
Specification