Height adjustable drive arrangement for a floor care machine

Details Height adjustable drive arrangement for a floor care machine Height adjustable drive arrangement for a floor care machine

2008-03-26

2011-12-06

Eley, Timothy V (Department: 3723)

Abrading

Frame or mount

Portable abrader

C451S350000, C451S352000, C451S360000

Reexamination Certificate

active

08070561

ABSTRACT:
A floor care machine such as a floor polisher includes a machine frame carrying a motor coupled through a drive arrangement to a rotationally driven head on which a floor care disc such as a polishing pad is mounted. The drive arrangement includes a drive element rotationally driven by the motor, and a driven element that is connected to the driven head and is automatically height adjustable. The drive element includes a bearing hub, an outer ring and four uniformly rotationally offset spokes that carry first rolling guides extending along helical paths about the rotation axis. The driven element includes upper and lower partial elements that receive the spokes therebetween and carry second rolling guides arranged facing the first rolling guides along the helical paths, and roller bodies are interposed therebetween. Relative rotation between the drive element and the driven element causes an axial height adjustment of the driven head.

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