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US 4,357,057 AGranted
Laminated bearing with improved low temperature operating characteristics
AssigneeBarry Wright Corporation
InventorsRobert R. Peterson, Daniel S. Ventura
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AssigneeBarry Wright Corporation
InventorsRobert R. Peterson, Daniel S. Ventura
Estimating the term…
A laminated device such as a bearing or coupling comprising an inner and an outer housing with a laminate therebetween of alternating resilient and non-extensible layers wherein at least one of its resilient layers is made of a material characterized by having a damping coefficient different from that associated with the material of at least one other resilient layer and preselected so as to improve the uniformity of the strain distribution within the laminate and, thereby, the low temperature operating characteristics of the device. In another embodiment of the invention, at least one of the resilient layers is comprised of discrete portions or segments, each having a nominal damping coefficient preselected so as to improve the bearing's operating characteristics in low temperature applications.
A device having an inner housing and an outer housing separated by and bonded to a laminate of alternating resilient and non-extensible layers characterized by the resilient layers adjacent to the housings being made of a material having a higher damping coefficient than the material in the resilient layers farther within the laminate and away from said housings.
In a laminated bearing comprising a plurality of alternating and bonded together layers of elastomeric and substantially non-extensible material with the layers concentrically disposed about one another and a common axis so as to permit the bearing to support compressional loads applied generally normal to said layers and torsional loads applied about said axis, the improvement wherein at least one of said elastomeric layers comprises a first portion thereof having a first nominal damping coefficient and a second portion thereof having a second nominal damping coefficient, and a third portion thereof, disposed axially between said first and second portions and having a third nominal damping coefficient less than that of said first and second portions, said damping coefficients selected so as to improve the uniformity of the strain distribution across said laminate during low temperature operation of the bearing.
A device for accommodating compressive and torsional loading and torsional deflection under low temperature conditions, said device comprising a laminate of alternating and bonded layers of elastomer and metal, wherein each elastomeric layer has an associated average damping coefficient preselected so as to substantially equalize the stiffness of each of said elastomeric layers.
Dependencies are inferred from the claim text.