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US 4,286,827 AGranted
Cylindrical elastomeric bearing
AssigneeBarry Wright Corporation
InventorsRobert R. Peterson, Daniel S. Ventura
Life of this patent
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AssigneeBarry Wright Corporation
InventorsRobert R. Peterson, Daniel S. Ventura
Estimating the term…
A cylindrical elastomeric bearing for carrying relatively large compressive radial loads while accommodating thrust and torsional loads acting along the bearing's longitudinal axis. The bearing generally comprises a rigid interior member and a rigid exterior member, with the two members being joined together by bonded concentric laminae comprising alternating strata of resilient material and non-extensible material. The fatigue life of the bearing is enhanced by forming each resilient stratum with a shear modulus of elasticity such that the stratum will tend to carry a strain substantially equal to the strain carried by every other resilient stratum when the bearing is subjected to a wide range of different torsional loads. The desired shear moduli of elasticity are attained for the different resilient strata over a wide range of different torsional loads by forming at least some of the resilient strata from two or more substrata of selected thicknesses wherein each substratum within a given resilient stratum comprises a resilient material having a unique shear modulus.
In a cylindrical elastomeric bearing comprising a rigid interior member and a rigid exterior member, wherein said interior and said exterior members are joined together by bonded concentric laminae comprising alternating strata of resilient material and non-extensible material disposed one about the other around a common axis,
A cylindrical elastomeric bearing having a central axis comprising a rigid interior member and a rigid exterior member joined together by bonded concentric laminae comprising alternating strata of resilient material and non-extensible material, each of said resilient strata being formed from two cylindrical, concentric, and bonded substrata each made of a resilient material having a shear modulus of elasticity different from the other, said substrata disposed one about the other and around the axis of the bearing, the size and material of said substrata being selected so that each of said resilient strata has an effective shear modulus of elasticity such that the torsional shear strains established within each resilient stratum are substantially the same as the strains established within every other resilient stratum over a wide range of different torsional loads.
Dependencies are inferred from the claim text.