Patent ID: 8585361

Claim:
A cooling fan system comprising: a first generally vertical truss support member; a second generally vertical truss support member; a generally horizontal truss member extending between the first vertical truss support member and the second vertical truss support member, the truss member rotationally attached to the vertical truss support members, the truss member rotational about a horizontal axis; the horizontal truss member comprising a fan unit, the fan unit comprising a fan blade housing, a fan motor, and a fan blade coupled to the fan motor, the fan blade having an axis of rotation which is generally perpendicular to the horizontal axis of the truss member, wherein the truss member is rotational about the horizontal axis to any position between a first position to a second position wherein the axis of rotation of the fan blade sweeps an arc of over 45 degrees as the truss member rotates from the first position to the second position; and rotation means attached to the truss member.