Patent ID: 7563235
Filing Date: 2009-07-21
Classification: A61H

Abstract:
1. A body vibration apparatus comprising: an at least partially rigid platform; a first motor coupled to the platform such that movement of the first motor imparts force to the platform, the first motor having a first shaft that selectively rotates in one of a first direction and a second direction; a first eccentric weight coupled to the first shaft such that the first eccentric weight rotates with the first shaft at a first phase and in a first plane; a second motor coupled to the platform such that movement of the second motor imparts force to the platform, the second motor having a second shaft parallel to the first shaft that selectively rotates in the other of the first direction and the second direction; a second eccentric weight coupled to the second shaft in the first plane such that the second eccentric weight rotates with the second shaft at the first phase; a third eccentric weight proximate the first eccentric weight, the third eccentric weight coupled for rotation about the first shaft only between a first angular orientation with respect to the first eccentric weight and a second angular orientation with respect to the first eccentric weight, the second angular orientation with respect to the first eccentric weight being different from the first angular orientation with respect to the first eccentric weight; and a forth eccentric weight proximate the second eccentric weight, the forth eccentric weight coupled for rotation about the second shaft only between a first angular orientation with respect to the second eccentric weight and a second angular orientation with respect to the second eccentric weight, the second angular orientation with respect to the second eccentric weight being different from the first angular orientation with respect to the second eccentric weight.