Laminated bearing with plural modulus layer

Details Laminated bearing with plural modulus layer Laminated bearing with plural modulus layer

1977-08-01

1978-08-08

Blix, Trygve M.

Cutlery

267152, 308 26, 416134A, F16C 2706

Patent

active

041052668

ABSTRACT:
A laminated bearing comprises a plurality of alternating and bonded together annular layers of elastomeric material and non-extensible material. The layers alternate along a common axis extending lengthwise of the bearing so that the bearing can support substantial compressive loads applied generally normal to the layers. The layers include at least one elastomeric layer which, if formed to have a nominally constant modulus of elasticity throughout and if subjected to a compressive load, would experience a shear strain adjacent one of its inner and outer circumferences greater than the shear strain adjacent the other circumference. Such a difference in compression-induced shear strains would tend to cause uneven wearing of and a reduced service life for the elastomeric layer in question and for the bearing as a whole. To avoid or minimize uneven wear, the elastomeric layer is formed to have at least two different moduli of elasticity. The nominal modulus of the layer is higher or highest adjacent the circumference of the layer which tends to experience the higher compression-induced shear strain. As a result, the ratio between the shear strains adjacent the two circumferences of the layer is less than what it would be if the layer had a nominally constant modulus of elasticity throughout.

REFERENCES:
patent: 2127219 (1938-08-01), Hirshfeld
patent: 2560627 (1951-07-01), Boschi
patent: 3071422 (1963-01-01), Hinks
patent: 3179400 (1965-04-01), Krotz
patent: 3544415 (1970-12-01), Price et al.
patent: 3941433 (1976-03-01), Dolling et al.

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