Road structure – process – or apparatus – Apparatus – Tool rotating in horizontal plane
Patent
1998-12-07
2000-02-01
Will, Thomas B.
Road structure, process, or apparatus
Apparatus
Tool rotating in horizontal plane
451350, 451353, 451451, E01C 1922
Patent
active
060195452
ABSTRACT:
A motorized finishing machine has a rotatable guard system enabling it to finish concrete surfaces next to walls, posts, conduits, or other obstacles. Deployed as a concrete trowel, the machine comprises an internal combustion motor that powers a gearbox to revolve a downwardly projecting rotor. Numerous radially spaced-apart finishing blades controlled by the rotor frictionally contact the concrete surface being treated. A protective guard, which circumscribes the rotor, is rotatably suspended by a plurality of rollers. The guard, which is shaped somewhat like a truncated cone, comprises an inner ring coaxially secured above a larger diameter, outer ring. Radially spaced apart spokes extend between the upper and lower rings and brace the guard. The bearing-equipped rollers mounted by radially, spaced-apart arms have upper and lower flanges. The inner guard ring is captivated between the rollers, and it is vertically constrained between the roller flanges. When the guard contacts an obstacle it may freely rotate, enabling the power trowel to approach otherwise-unreachable surface regions without wobbling or rocking.
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"BM 60 Kantafwerker" Spec. Sheet--B-Mac Daar Draait'T OM.
Allen J. Dewayne
Guinn Timmy D.
Allen Engineering Corporation
Carver Stephen D.
Markovich Kristine
Will Thomas B.
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