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专利名称：VIBRATOR ROLLER发明人：BEST F,CA申请号：US3791629D申请日：19720905公开号：US3791629A公开日：19740212
摘要：A vibrator including a housing forming a cylindrical chamber, a roller located inthe chamber and having a smaller diameter than the diameter of the chamber, air inletand outlet means to and from the chamber respectively located to cause the roller toroll around the wall of the chamber when air is supplied to said inlet means, said rollerhaving a cylindrical shell with a transverse web extending across the interior of the shellmid-way between the ends of the shell, and secondary masses retained within the shellon opposite sides of the transverse web, the centre of gravity of said masses and henceof said roller being spaced from the central longitudinal axis of the shell.
申请人：BEST F,CA
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