Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate
2007-09-11
2007-09-11
Redding, David (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
C015S360000, C015S371000
Reexamination Certificate
active
10629067
ABSTRACT:
A brush roller accessory for a vacuum cleaner includes a main support roller and a power-driven brush roller rotatably arranged in a housing, and a spring-biased adjusting roller that adjustably protrudes from the housing to bear some of the total contact force of the accessory against a floor, to reduce or relieve the contact force exerted by the brush roller against the floor. The adjusting roller is rotatably mounted on a pivot lever, having a first end pivotally connected to the housing and a second end connected to a spring that biases the lever to pivot the adjusting roller outwardly from the housing. A rotary knob with several stop surfaces selects an upper limit on the pivot range of the lever and the adjustment height of the adjusting roller. A coupling link pivots the adjusting roller to a maximally protruding position to lift the brush roller into a parking position.
REFERENCES:
patent: 3676892 (1972-07-01), Nordeen
patent: 5522114 (1996-06-01), Allison
patent: 5819370 (1998-10-01), Stein
patent: 2 047 081 (1980-11-01), None
Laaser Andreas
Stein Thomas
Fasse W. F.
Fasse W. G.
Redding David
Stein & Co. GmbH
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