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Control of torque in floor maintenance tools by drive motor load

  • US 4,757,566 A
  • Filed: 07/27/1987
  • Issued: 07/19/1988
  • Est. Priority Date: 07/27/1987
  • Status: Expired due to Term
First Claim
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1. An automatic tool torque compensator for a surface maintenance machine including means for raising and lowering one or more surface maintenance tools, motor means for driving the surface maintenance tools, means for sensing the load in said motor means and for providing an electrical signal representative thereof, means for selecting a desired tool torque from a plurality of possible tool torques and for providing an electrical signal representative thereof, and means for utilizing said electrical signals to control the operation of said means for raising and lowering the surface maintenance tools to maintain the desired tool torque.

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