| 20110160004 | TRAINING INSTRUMENT FOR SPORTS - A training instrument includes a rigid pipe being provided with engaging striae extending in an axial direction, and having a predetermined inner diameter, leaf-shaped wings each of which is provided with a projection of a cross-sectional shape in accordance with each of the engaging striae, a shaft having an outer diameter smaller than an inner diameter of the pipe and being inserted in the pipe, a stopper being attached to an end of the shaft, and a grip being attached to the shaft. | 06-30-2011 |
