Tennant Company

Neil F Brown

Keith N Krier

Steven J Waldhauser

Logan W Johnson

Donald J Haub

Ranjan K Nirgude

Roger D Star

Floor maintenance machine

A scrubbing device is provided including a body which is supported on a plurality of wheels which are driven by a hydraulic pump. The scrubbing machine has a squeegee which is hydraulically raised and lowered. The machine is provided with a sensing device adjacent the hydraulic drive pump which senses the flow of the hydraulic fluid and actuates valving to raise the squeegee upon reverse movement of the scrubber and lower the squeegee upon forward movement of the scrubber.

Scrubber with hydraulic squeegee lift

An improvement for floor maintenance equipment employing electrically driven scrubbing or polishing brushes including means for varying the speed of the brush motors. Two brush speeds are provided by switching apparatus which change the interconnection of the brush motors from series to parallel and from parallel to series. This results in a substantial change in motor speed and power.

Multi-speed brush control

A scrubbing machine that includes an articulated vehicle having a power unit and a trailer unit coupled thereto, said trailer unit having cleaning and dirty solution tanks thereon, a squeegee assembly on the power unit having a central liquid take-up tube and a second take-up tube at one end portion thereof, controls operated by turning the vehicle in the appropriate direction for switching the application of vacuum from the central tube to the second tube, a scrubber head unit and an assembly for mounting and carrying the scrubber unit on the vehicle and raising and lowering the scrubber unit including an articulated joint to permit limited pivotal movement of the scrubber head about a generally vertical axis and an axis perpendicular thereto.

Scrubbing machine

Growing community of inventors

Minneapolis, MN, United States of America

Neil F Brown