Patent ID: 6183408
Filing Date: 2001-02-06
Classification: B04B,F16C,Y10T

Abstract:
A rotor shaft assembly comprising:an elongated shaft having a first end and a second end and having an axis of rotation;a housing having means for attachment to a rotation source, the housing surrounding the second end of the shaft and extending along the shaft for a first length, a first clearance being established between the housing and the shaft;a spindle hub having means for connection to a rotor and surrounding the first end of the shaft, the spindle hub having a wall portion surrounding the shaft and extending for a second length of the shaft and overlapping a first portion of the first length of the housing, a second clearance being established between the wall portion of the spindle hub and the first portion of the housing; anda sleeving circumferentially disposed between an inner side of the wall portion of the spindle hub and the first portion of the housing, wherein the sleeving is mounted either on the spindle hub or on the housing to form a third clearance between the sleeving and either the housing or the spindle hub, respectively, and the sleeving contacting either the housing or the spindle hub, respectively, to restrict motion when, upon reaching a critical speed, the axis of rotation of the shaft is shifted.