Importance

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Abstract

A self-compensating linear motion bearing assembly is provided including a bearing carriage configured to be supported on a support rail and having at least one bearing surface or race. The bearing carriage is adapted to receive a supply of pressurized hydrostatic fluid. A carriage tape is bonded to the bearing surface such that the tape is positioned between the bearing carriage and support rail. The carriage tape is constructed from a self-lubricating high performance polymer. In the event that hydrostatic fluid pressure is lost, the carriage tape permits substantially frictionless movement between the carriage and the support rail to prevent damage to the bearing assembly and/or to the load supported thereon. In a preferred embodiment, the bearing carriage includes a pair of upper and lower bearing races. Carriage tape having a compensator formed therein is bonded to each of the bearing races. Each compensator includes a supply port, a collector and an elongated relief or pocket. By forming the compensators in the carriage tape and subsequently bonding the tape to the bearing races, the costs and complexities involved in manufacturing the bearing assembly are greatly reduced.

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First Claim