Importance

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Abstract

A lighting pole bracket arm isolates vibrations that would otherwise pass through the lighting pole and into a lighting fixture mounted on the lighting pole. The bracket arm includes an upper member which is pivotally mounted to the lighting pole and a lower telescopic member, which is pivotally mounted to the lighting pole at a position below the upper member pivotal mount. The lower telescopic member includes an inner tube that is slidably received within an outer tube. A cylindrical oil-free sleeve bearing is press fit over the end of the inner tube that is received within the outer tube, and a second cylindrical oil-free sleeve bearing is press fit into the end of the outer tube that fits over the inner tube. A coil spring is housed within the outer tube between a closed end of the outer tube opposite from the end having the sleeve bearing and the end of the inner tube slidably received within the outer tube. The combination of the coil spring and the sleeve bearings results in a damping of any vibrations passed through the lower member from the lighting pole to the lighting fixture.

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First Claim