Agitating – By vibration – Of stirrer
Patent
1999-01-19
2000-12-05
Cooley, Charles E
Agitating
By vibration
Of stirrer
B01F 1100
Patent
active
061557080
ABSTRACT:
A lightweight, portable concrete vibrator is provided. A vibrator head includes a hollow casing with an eccentric rotor having a curved segment along one side extending in an arc of 120.degree. so as to position the rotor centroid at the most favorable position to induce maximum vibration for aggregate distribution and filling of voids or air pockets in wet concrete. An inverted, V-shaped stiffening segment is formed on the opposite side of the rotor. The ratio of the centroid offset from the rotation axis to the diameter is in the range of 1:3.5-1:3.75. A tubular support assembly forms the handle for the motor. Preferably, the motor is a small, two cycle engine operating in the range of 5,000 to 7,000 rpms. A bearing sleeve may be provided adjacent the distal end of the vibrator head in order to accommodate any incidental lateral flexing of the rotor in the casing.
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