  We investigate the motion of a wedge-shaped object (a granular Brownian
motor), which is restricted to move along the x-axis and cannot rotate, as gas
particles collide with it. We show that its steady-state drift, resulting from
inelastic gas-motor collisions, is dramatically affected by anisotropy in the
velocity distribution of the gas. We identify the dimensionless parameter
providing the dependence of this drift on shape, masses, inelasticity, and
anisotropy: the anisotropy leads to a dramatic breaking of equipartition, which
should easily be visible in experimental realizations.
