Importance

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Abstract

A self propelled sawing machine that includes a frame having ground engaging front and rear wheels, an engine driven infinitely variable hydrostatic or mechanical transmission on the frame that is drivingly connected to the rear wheels, a circular saw blade mounted on the frame and drivenly connected to the engine for making cuts in paving or floor materials such as concrete, masonry, etc., a main housing on the frame, a handle connected to one of the main housing and the frame for controlling the direction of movement of the machine, and control mechanism connected to the transmission for controlling the speed and direction of propulsion of the machine. The control mechanism includes a vernier control assembly for coarse and fine adjustment of the forward speed that can be set for a selected optimum speed and manually operable control mechanism connected between the vernier control assembly and transmission that when operated can change the direction and speed of propulsion but that will automatically return to the pre-set optimum condition determined by the setting of the vernier control assembly. The control apparatus also can be used on self propelled walk-behind or ride-on grooving and/or grinding machines.

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First Claim