Hydraulically driven, multiple rotor riding trowel

Details Hydraulically driven, multiple rotor riding trowel Hydraulically driven, multiple rotor riding trowel

1998-11-23

2000-04-11

Pezzuto, Robert E.

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

E01C 1922

Patent

active

060481307

ABSTRACT:
A high performance, hydraulically-propelled, multiple rotor riding trowel for finishing concrete is controlled with hydraulic circuitry enabling steering wheel and foot pedal control. The rigid trowel frame preferably mounts three separate spaced-apart, downwardly-projecting, bladed rotor assemblies that frictionally engage the concrete surface. The rear rotor assemblies are tilted with double acting, hydraulic cylinders to effectuate steering and control in response to foot pedals. Double acting hydraulic cylinders also control blade pitch. Separate gimbaled, hydraulic motors revolve each rotor assembly. A steering wheel controlling a front, hydraulic steering control valve controls the front tilting cylinder to facilitates steering with minimal physical exertion.

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patent: 5584598 (1996-12-01), Watanabe
patent: 5613801 (1997-03-01), Allen
patent: 5685667 (1997-11-01), Allen

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