Power trowel

Details Power trowel Power trowel

1985-05-31

1986-12-16

Novosad, Stephen J.

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

403224, 425458, 16112, 267141, 173162H, E01C 1942, E01C 1944

Patent

active

046293590

ABSTRACT:
The power trowel of this invention has a chassis comprising a gear box and a prime mover and has a plurality of blades which engage a surface to be finished and which are driven by the prime mover, through the gear box, for substantially edgewise rotation about a vertical axis. An elongated handle for controlling movements of the machine across the surface has a pivotal connection to the chassis to be swingable up and down, but has an upper limit of such motion from which it is swingable downwardly. An elastically compressible shock absorber, confined between the handle and the chassis under compressive preload, tends to maintain the handle at that limit and is further compressed by downward force on the rear end of the handle. The center of gravity of the chassis is spaced forward of the vertical axis. Control of machine movements is minimally influenced by machine vibration, and is therefore more precise and less fatiguing.

REFERENCES:
patent: 928702 (1909-07-01), Rodman
patent: 2875676 (1959-03-01), Thieme et al.
patent: 2882806 (1959-04-01), Thieme et al.
patent: 3318575 (1967-05-01), Hawkins et al.
patent: 4198178 (1980-04-01), Carlstrom et al.

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