Patent ID: 7168890
Filing Date: 2007-01-30
Classification: E02D

Abstract:
1. An eccentric vibration system comprising: at least one major eccentric member; at least one minor eccentric member; a first motor assembly; a second motor assembly; and a transmission system for connecting the first and second motor assemblies to the major and minor eccentric members, where the transmission system comprises the transmission system operates in when the transmission system operates in the first and second modes, the first and second motor assemblies rotate the major and minor eccentric members through the at least one direct gear, at least one pin gear, and at least one drive pin such that transverse vibratory forces generated by the major eccentric member substantially cancel transverse vibratory forces generated by the minor eccentric member; when the transmission system operates in the first mode, the first and second motor assemblies rotate the major and minor eccentric members through the at least one direct gear, at least one pin gear, and at least one drive pin such that longitudinal vibratory forces generated by the major eccentric member substantially cancel longitudinal vibratory forces generated by the minor eccentric member; and when the transmission system operates in the second mode, the first and second motor assemblies rotate the major and minor eccentric members through the at least one direct gear, at least one pin gear, and at least one drive pin such that longitudinal vibratory forces generated by the major eccentric member are added to longitudinal vibratory forces generated by the minor eccentric member.