Patent ID: 6053660
Filing Date: 2000-04-25
Classification: E04F

Abstract:
A motorized, twin rotor riding trowel comprising:a frame;two rotor assemblies pivoted to said frame for finishing a concrete surface, each rotor assembly comprising a plurality of blades of variable pitch and each rotor assembly comprising an axis of rotation, both axes lying in a biaxial plane generally perpendicular to said surface;internal combustion motor means for powering the trowel;a source of hydraulic pressure driven by said motor means;first cylinder means linked to said frame and extending to said rotor assemblies for tilting said rotor assemblies in a plane parallel to or coplanar with the biaxial plane to effectuate steering and propulsion;second cylinder means linked to said frame and extending to one of said rotor assemblies for tilting it in a plane perpendicular to the biaxial plane to aid steering and propulsion;joystick means comprising separate left and right joysticks accessible to the trowel operator for operating said first cylinder means and said second cylinder means, whereby the operator of the trowel can steer and control it hydraulically.