Sequential actuation skirt and brush floor scrubber

Details Sequential actuation skirt and brush floor scrubber Sequential actuation skirt and brush floor scrubber

1999-09-30

2001-06-26

Spisich, Mark (Department: 1744)

Brushing, scrubbing, and general cleaning

Machines

Brushing

C015S320000

Reexamination Certificate

active

06249926

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to floor cleaning machines. Floor cleaning machines, particularly floor scrubbers, typically employ one or more powered rotary scrub brushes suspended beneath the scrubber vehicle, and peripheral skirts or splash guards around the machine periphery for retaining the floor cleaning liquid beneath the vehicle. Heretofore the scrub brushes have been directly mounted to the vehicle frame, or have been vertically movable relative to the vehicle frame. The skirts/splash guards are sometimes mounted to the brush motor or motor support as in
FIG. 13
, and sometimes are mounted directly to the vehicle frame independent of vertically movable brushes as in FIG.
14
.
Disadvantages of the
FIG. 13
arrangement include poor appearance of the machine due to exposure of the motor and related mechanism, difficulty in seeing and installing new brushes because of interference by the skirt, and skirt dragging and premature wear of the skirt as the brush bristles wear down.
Disadvantages of the
FIG. 14
arrangement include the fact that the skirt remains in engagement with the floor when the brush is elevated, and that, on uneven floors, the skirt will at least partially lift enough to allow cleaning fluid to spray out under the splash guard.
SUMMARY OF THE INVENTION
The present cleaning machine employs a vertically shiftable brush and motor assembly, a separate vertically shiftable skirt/splash guard assembly, and a cooperative arrangement between the brush and skirt causing controlled elevation of the skirt with elevation of the brush. Both the skirt and the brush remain in optimum engagement with a floor surface during operation, but since the skirt is elevated cooperatively with elevation of the brush using a lost motion engagement, the skirt does not drag on the floor when the brush is not scrubbing.


REFERENCES:
patent: 3277511 (1966-10-01), Little et al.
patent: 3305887 (1967-02-01), Turner
patent: 3436788 (1969-04-01), Tamny
patent: 3701177 (1972-10-01), Meyer et al.
patent: 4069540 (1978-01-01), Zamboni
patent: 4805256 (1989-02-01), Mason et al.
patent: 4956891 (1990-09-01), Wulff

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