Riding trowel with CVT clutch module
AssigneeAllen Engineering Corporation
InventorJeffrey Lynn Fielder
Life of this patent
Estimating the term…
Abstract
A power riding trowel for finishing concrete comprising rotors turned by gearboxes driven by gearbox driveshaft's linked to the moor output by CVT gear ratio control. The motor output shaft drives a first jackshaft driven at a higher speed than the motor RPM. A CVT pulley assembly comprising first and second CVT pulleys and a CVT belt entrained between them has a first CVT pulley driven by the first jackshaft. A second jackshaft splined to the second CVT pulley drives the gearbox driveshaft at a speed lower than said second jackshaft to operate the rotor means at a proper speed and torque.
Claims2
A power trowel for finishing concrete, said trowel comprising:
- motor means for powering said trowel, said motor means delivering power to a motor output shaft;
- rotor means for treating a concrete surface;
- gearbox means for driving said rotor means;
- gear box driveshaft means for turning said gear box means;
- a first jackshaft driven by said motor output shaft at a higher speed than the motor output shaft;
- a CVT assembly comprising first and second CVT pulleys and a CVT belt entrained between them, said first CVT pulley driven by said first jackshaft;
- a second jackshaft splined to said second CVT pulley and driven thereby;
- and,
- said second jackshaft driving said gearbox driveshaft means at a speed lower than said second jackshaft to operate the rotor means at a proper speed and torque.
A power trowel for finishing concrete, said trowel comprising:
- a frame;
- a seat disposed on the frame for an operator;
- means accessible to a seated operator for controlling the trowel;
- motor means mounted on said frame for powering said trowel, said motor means delivering power to a motor output shaft;
- rotor means comprising a plurality of blades for treating a concrete surface, the rotor means projecting downwardly from said frame;
- gear box means for driving said rotor means;
- gear box driveshaft means for turning said gear box means;
- a first pulley splined to said motor output shaft;
- a first jackshaft parallel with and spaced apart from said motor output shaft;
- a second pulley splined to said jackshaft, said second pulley having a smaller diameter than said first pulley and driven by a belt entrained over said first and second pulleys whereby said first jackshaft rotates at a higher speed than said motor output shaft;
- a CVT pulley assembly comprising first and second CVT pulleys and a CVT belt entrained between them, said first CVT pulley splined to said first jackshaft;
- a second jackshaft splined to said second CVT pulley and driven thereby;
- a third pulley driven by said second jackshaft;
- a fourth pulley splined to said gearbox driveshaft means, the fourth pulley having a larger diameter than the third pulley;
- and,
- a third belt entrained between said third and fourth pulleys for driving said gearbox driveshaft means.
Dependencies are inferred from the claim text.