1977-02-03
1977-12-20
Kunin, Stephen G.
Cutlery
291495NM, 267 571R, 308184R, 416134R, F16F 138
Patent
active
040637875
ABSTRACT:
Flexible bearings of the type constructed of alternate, clyindrical layers of rigid material, or shims, and elastomer bonded together are made substantially free of internal, tensile stresses by making the walls of the shims wedge-shaped and by alternating the thin and thick ends of adjacent shims. As the elastomer cures and cools during manufacture of the bearing, it typically shrinks in volume, causing residual tensile stresses in prior-art cylindrical bearings. However, this shrinkage causes the shims of the present invention to move together axially, thus relieving the stress. If there is an odd number of shims, there is no axial displacement of the inner mounting ring of the bearing relative to the outer mounting ring, as a result of elastomer shrinkage. Alternatively, all shims may be initially held out of alignment, so that shrinkage of the elastomer will pull them into alignment.
REFERENCES:
patent: 3071422 (1963-01-01), Hinks
patent: 3834181 (1974-09-01), Strasburg et al.
Anderson Richard A.
Bakken Gordon J.
Kunin Stephen G.
Marcus Stanley A.
McCullough Edward E.
Thiokol Corporation
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