Patent ID: 9038491
Filing Date: 2015-05-26
Classification: B06B,Y10T

Abstract:
1. An electrically powered vibratory device configured to generate an oscillating load, the vibratory device comprising: a rotor having a shaft and a rotation limiter, the shaft having a shaft axis about which the rotor is configured to rotate; a first eccentric weight pivotally mounted to the shaft, the first eccentric weight having a center of mass that is offset from the shaft axis, the first eccentric weight comprising a rotation limiter that cooperates with the rotation limiter of the rotor in a manner such that the first eccentric weight is able to pivot about the shaft axis relative to the shaft only through an arc of rotation that is less than 360 degrees; the vibratory device being adapted and configured such that that the shaft, together with the first eccentric weight, can be rotationally driven about the shaft axis in opposite directions by switching the polarity of electrical power supplied to the vibratory device and such that the first eccentric weight will pivot through the arc in response to the polarity of electrical power being switch, the vibratory device being further adapted and configured such that switching the polarity of electrical power supplied to the vibratory device will not alter the oscillating load generated by the vibratory device.