Method of detecting a missing pad for a floor polishing tool

Details Method of detecting a missing pad for a floor polishing tool Method of detecting a missing pad for a floor polishing tool

1992-11-19

1994-03-29

Breneman, R. Bruce

Cleaning and liquid contact with solids

Processes

Combined

134 6, 134 42, 15 98, 15 491, 51177, B08B 704

Patent

active

052980804

ABSTRACT:
A surface treating tool such as a floor polisher and method and apparatus for detecting the absence of a pad or other surface treating member on the tool. In the preferred manner of operation, the invention monitors the amperes being drawn by an electric motor rotating the pad support. If the amperage draw during initial start up of the tool is less than a predetermined amount (representing the absence of a pad on the support, the tool is prevented from lowering the padless support into potentially damaging contact with the floor or other surface.

REFERENCES:
patent: 3129539 (1964-04-01), Tempero
patent: 3496681 (1970-02-01), Oswald
patent: 4651378 (1987-03-01), Serou et al.
patent: 4674142 (1987-06-01), Meili
patent: 4757566 (1988-07-01), Field et al.
patent: 5056175 (1991-10-01), Stein et al.
patent: 5127124 (1992-07-01), Palmer et al.

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