Torsionally flexible frame structure

Details Torsionally flexible frame structure Torsionally flexible frame structure

1995-01-13

1997-03-18

Scherbel, David

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

153402, 153404, 15384, 280781, A47L 1129, A47L 11292

Patent

active

056111053

ABSTRACT:
A floor scrubber has four wheels for stable support on the floor. These wheels are attached to the underside of a resilient molded plastic frame so that any vertical movement of any of the wheels is transmitted directly to the frame. The frame is ribbed to be stiff in longitudinal bending, but torsionally the frame is somewhat flexible. The scrubber body, which is attached to the upper side of the frame and is supported by the frame, is also a molded plastic part which is somewhat flexible. The weight of the body and its contents keeps all four wheels on the floor at all times, even when the floor is uneven, by flexing the frame and body as needed. This structural flexibility eliminates any need for an additional means to keep all the wheels on the floor, such as a sprung suspension or a center pivoted axle.

REFERENCES:
patent: 4492002 (1985-01-01), Waldhauser et al.
patent: 4667364 (1987-05-01), Meili
patent: 4956891 (1990-09-01), Wulff
patent: 5238267 (1993-08-01), Hutchison et al.
patent: 5369838 (1994-12-01), Wood et al.

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