Patent ID: 7051617
Filing Date: 2006-05-30
Classification: B64G,F16F,Y10T

Abstract:
1. An inner gimbal assembly comprising: an upper housing, said upper housing defining a first spring constant; a lower housing connected to said upper housing, said lower housing defining a second spring constant, said upper housing and said lower housing defining an interior space; a shaft contained within said interior space, said shaft having a first end and a second end, said first end being mounted to said upper housing and said second end being mounted to said lower housing, said shaft and said lower housing defining an annulus, said annulus defining a volume; a rotating member affixed to said shaft, said rotating member defining a mass; a floating bearing cartridge coaxially positioned within said annulus; said floating bearing cartridge moving axially within said annulus; and a viscous fluid filling said annuls and surrounding said floating bearing cartridge, said viscous fluid providing a damping effect for said axial displacements of said floating bearing cartridge in response to a plurality of external vibrations, said viscous fluid being selected by a mathematical equation considering said first spring constant and said second spring constant and mass and said volume; wherein said mathematical formula is defined as C