Patent ID: 8184058

Claim:
A rotatable radar antenna system comprising: a rotatable platform adapted to receive a radar antenna thereon; a radar slip ring having a rotatable component and a stationary component, said rotatable component rotatable about generally the same axis of rotation as the rotatable platform, wherein the rotatable platform and the rotatable component are separated by a given radial distance; and a torque arm assembly connecting said rotatable component to said rotatable platform, said torque arm assembly comprising: an axial assembly positioned along a radial axis between the rotatable platform and component, the assembly having a first end coupled to the rotatable platform and a second end coupled to a transverse body; and a transverse shaft fixedly coupled to the rotatable component via at least a pair of support members, wherein the transverse body is adapted to translate along a transverse axis (x-x) transverse to the radial axis and relative to the transverse shaft; wherein the at least one pair of supporting members limit the translation of the transverse body along the transverse axis relative to the transverse shaft, and wherein the axial assembly has a length that is axially variable to compensate for variations in the given radial distance between the rotatable platform and the rotatable component during rotation of the rotatable platform and the rotatable component.