Hydraulically controlled steering for power trowel
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United States of America Patent
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Oct 6, 1998
Grant Date -
N/A
app pub date -
Jan 23, 1997
filing date -
Jan 23, 1997
priority date (Note) -
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Abstract
A self-propelled power trowel, for finishing a concrete surface, is provided, having a rigid frame adapted to be disposed over a concrete surface, an engine assembly, and at least a pair of rotor assemblies having rotatable trowel blades. The rotor assemblies are tiltable relative to the frame. Dual-action hydraulic cylinders are provided interconnected between the frame and the rotor assemblies for selectively tilting the rotors to provide steering control to the power trowel. The hydraulic fluid is delivered to the cylinders at variably selectable but constant pressures through the proportional pressure output control valves.
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