Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1986-01-27
1987-04-21
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Machines
Brushing
15 98, 51177, A47L 11162
Patent
active
046584595
ABSTRACT:
A floor polishing machine according to the preferred form of the teachings of the present invention includes a body portion having a platform, and a handle pivotally mounted to the platform. First and second sets of wheels are provided adjacent the rear of the platform and on opposite sides of the handle pivot. For coupling the handle and the platform together, torsion springs are provided having first ends anchored to the platform and having second ends connected to the handle. The torsion springs urge the platform to pivot about the first set of wheels downwardly in the rear and upwardly in the front. The level of the second set of wheels is slightly above the level of the first set of wheels for limiting the amount of upward movement of the front of the platform by the torsion springs when the polishing member is not being rotated by the motor allowing a partial vacuum to be formed under the polishing member when it is rotated by the motor to place a downward suction on the polishing member and counteracting with the torsion springs to place an even force on the floor surface by the polishing member regardless of the pivotal position of the handle with respect to the platform and regardless of the unevenness of the floor surface.
REFERENCES:
patent: 1650690 (1927-11-01), Cavicchi
patent: 1875138 (1932-08-01), Pond et al.
patent: 2142697 (1939-01-01), Myers
patent: 3100903 (1963-08-01), Doyle, Sr.
patent: 3154802 (1964-11-01), Hanschitz et al.
patent: 3303524 (1967-02-01), Schneider
patent: 4115890 (1978-09-01), Burgoon
patent: 4358868 (1982-11-01), Cook, Jr.
Advance Machine Company
Roberts Edward L.
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