Patent · US Expired

Floor cleaning machine

US5056175A · kind A · utility

29Cited by

3References

20Claims

0Family size

Assignee

STEIN & CO. GmbH · DE

Inventors

Klaus Stein · Velbert, DE
Heinz Kaulig · Velbert, DE

Key dates

Filing date	Jan 17, 1990
Grant date	Oct 15, 1991
Priority date	—
Expiry date	Jan 17, 2010

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47L9/0494
WIPO fieldFurniture, games
WIPO sectorOther fields

Abstract

In a floor cleaning machine with a driven brush roller, the invention specifies that the height of the brush roller can be adjusted automatically as a function of the torque. For this purpose, between the drive and the brush roller, a spring, which is tuned to the torque for the working phase, is employed as a coupling element. When deviations from the specified torque occur, actuating signals for an automatic height adjustment of the wheel are produced, until the specified torque of the brush roller is re-established.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.