Gryoscope controlled walk behind trowel

Details Gryoscope controlled walk behind trowel Gryoscope controlled walk behind trowel

2005-01-25

2005-01-25

Hartmann, Gary S. (Department: 3671)

Road structure, process, or apparatus

Apparatus

Tool rotating in horizontal plane

Reexamination Certificate

active

06846127

ABSTRACT:
A control module for a walk behind trowel configured to detect and to prevent an uncontrolled or undesirable motion of the trowel. The trowel includes an engine configured to drive rotation of a rotor. The control module includes a gyroscope and a controller. The gyroscope is configured to provide an electrical signal representative of an angular rate of motion of a reference structure on the walk behind trowel. The controller is configured to receive the electrical signal from the gyroscope and to determine when a change in the angular rate of motion of the trowel exceeds a threshold value, and in response, to prevent the engine from driving the rotor to rotate.

REFERENCES:
patent: 4232980 (1980-11-01), Tertinek et al.
patent: 5584598 (1996-12-01), Watanabe et al.
patent: 6758631 (2004-07-01), Frankeny, II

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