Power trowel with cam-actuated blade pitch adjustment mechanism

Details Power trowel with cam-actuated blade pitch adjustment mechanism Power trowel with cam-actuated blade pitch adjustment mechanism

1985-02-22

1986-03-25

Flint, Jr., J. Howard

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

15 49R, 51177, E01C 1922

Patent

active

045779937

ABSTRACT:
An engine-driven trowel includes a handle, a set of blades rotated within a single plane, a blade pitch control unit having a swash plate, a swash plate actuator arm and a pivot pin for pivotally coupling the actuator arm to the trowel. A blade pitch adjustment mechanism includes a lever-actuated cam assembly which engages and deflects the outboard end of the swash plate actuator arm. Up and down movements of the lever rotate the cam and displace the swash plate actuator arm to change the pitch of the trowel blades.

REFERENCES:
patent: 2869441 (1959-01-01), Barnes
patent: 3412657 (1968-11-01), Colizza et al.
patent: 3458885 (1969-08-01), Danielsson
patent: 3791754 (1974-02-01), Zochil
patent: 4198178 (1980-04-01), Carlstrom
patent: 4232980 (1980-11-01), Tertinek et al.
Superior Featherweight Tools Co., Inc. Model GH Trowel Machine Brochure.

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