Vibrating concrete hand trowel

Details Vibrating concrete hand trowel Vibrating concrete hand trowel

2007-07-10

2008-12-16

Hartmann, Gary S (Department: 3671)

Road structure, process, or apparatus

Apparatus

Means to agitate material

C404S118000, C015S235400

Reexamination Certificate

active

07465121

ABSTRACT:
A hand trowel for vibrating concrete in order to smooth the concrete. The trowel has a blade, a handle mounted on the blade, and electrical components including a motor inside the handle. When the switch is turned on, the motor causes the handle to vibrate, which in turn transmits vibrations to the blade and to the concrete surfaces that come in contact with the blade.

REFERENCES:
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patent: 5632569 (1997-05-01), Szmansky
patent: 6013972 (2000-01-01), Face et al.
patent: 6139217 (2000-10-01), Reuter
patent: 2005/0036837 (2005-02-01), Marshall
patent: 64-21168 (1989-01-01), None
patent: 64-24958 (1989-01-01), None
patent: 2005-351058 (2005-12-01), None

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