Mechanical pitch control

Details Mechanical pitch control Mechanical pitch control

2006-05-16

2006-05-16

Addie, Raymond (Department: 3671)

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

Reexamination Certificate

active

07044682

ABSTRACT:
A concrete finishing machine having a rotatable trowel blade assembly and a mechanism for controllably adjusting the pitch of the trowel blades relative to a wet concrete surface on which the blades rest. The machine's engine's drive shaft rotation itself is utilized to create changes in pitch.

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