ToughBuilt Industries, Inc.
Extendable grade rod receiver

Abstract:

An extendable grade rod receiver includes a plurality of elongate telescoping rods provided with elongate channels along their lateral edges. A receiver receives a reference beam from a remote transmitter includes a carriage movable along the rods and coupled to the receiver for sharing axial movements. The carriage is provided with wheels moveable in directions generally normal to the axis. The wheels are receivable within the elongate channels of all of the rods and are inwardly biased towards the axis to retain the wheels within the channels or grooves of any of the rods as the carriage moves over the steps or discontinuities as it moves from one rod to a next adjacent rod. Visual and machine-readable indicia are provided on the elongate front surfaces of the telescoping rods that can be encoded by a reader module on the receiver. Other mating rolling or sliding profiles can be used.