Patent ID: 7798035
Filing Date: 2010-09-21
Classification: B25J,F16F,Y10T

Abstract:
1. A mechanical arm, comprising: a forearm; a first spring; an upper arm connected between the forearm and the first spring, wherein the forearm applies a mass that generates a first moment at the upper arm; a copy device associated with the upper arm, the copy device copying the first moment to the first spring, wherein the first spring applies a counter-force to a tension member connected between the first spring and the upper arm to resist at least a portion of the moment; a shoulder with which the upper arm is rotatably connected, wherein the upper arm generates a second moment at a junction of the upper arm and the shoulder; a second spring, wherein the second spring applies a counter-force to resist at least a portion of the second moment; a pitch gimbal mechanism pivotable based on pitch movement of the upper arm at the shoulder; and a yaw gimbal mechanism pivotable based on yaw movement of the upper arm at the shoulder.