Rotor driven vibratory device having rotor centralization means and vibrational mode selection means associated therewith

Abstract From the Canadian patent

A vibratory device (10) is disclosed wherein a fluid-driven rotor (60) is driven about a shaft (42) to impart vibrations thereto and drive a work tool (24) or other object attached to the shaft (42). The vibratory device includes means (51) on the shaft (42) for correcting displacement of the rotor (60) from its drive position. That means comprises a portion (51) of the shaft (42) beneath the rotor means (60) having an enlarged diameter such that movement of the rotor (60) caused by shaft wear is corrected. Additional means (65) may be associated with the rotor (60) e.g. chamfered end edges of the rotor, which minimize pressure differentials at the end of the rotor edges and consequently …