| 摘要 |
PCT No. PCT/GB89/00086 Sec. 371 Date Sep. 18, 1990 Sec. 102(e) Date Sep. 18, 1990 PCT Filed Jan. 27, 1989 PCT Pub. No. WO89/07081 PCT Pub. Date Aug. 10, 1989.A rolling ball assembly for a rolling ball deck with a spherical ball (10), a support for the ball to permit free rotation about any horizontal axis through the ball; a pair of horizontal drive shafts (4, 5), one on either sie of the ball; a collar (8, 9) on each driving shaft, with the periphery of each collar being in driving engagement with the ball at or close to a horizontal plane through the equator of the ball, and between the horizontal axis of the ball perpendicular to the drive shafts and the horizontal axis parallel to the drive shafts so the ball may be rotated about any horizontal axis through rotation of the drive shafts. |
