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US 4,679,271 AGranted
Automatic tool force compensator for a surface maintenance machine
AssigneeTennant Company
InventorsBruce F. Field, Joseph G. Kasper
Life of this patent
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AssigneeTennant Company
InventorsBruce F. Field, Joseph G. Kasper
Estimating the term…
There is disclosed an improvement in a surface maintenance machine whereby means are provided for automatically maintaining a desired normal force by a maintenance tool against a surface being maintained, although there may be undulations in the surface, variations in the condition of the surface and changes in the tool caused by wear. Normal force is applied to the tool by gravity and an actuator, both acting through a load cell which senses their algebraic sum, compares this with a preset desired force and operates the actuator as needed to maintain the force at or near the pre-set level. Further, the load on the motor or motors driving the tool is sensed and compared against high and low reference points. If drive motor load is outside of the reference limits a signal is provided which causes a decrease or increase in the normal force to maintain the motor load within limits.
An automatic tool force compensator for a surface maintenance machine including,
An automatic tool force compensator for a surface maintenance machine including,
Dependencies are inferred from the claim text.