| 摘要 |
<p>PCT No. PCT/GB92/01268 Sec. 371 Date Nov. 22, 1994 Sec. 102(e) Date Nov. 22, 1994 PCT Filed Jul. 13, 1992 PCT Pub. No. WO93/19820 PCT Pub. Date Oct. 14, 1993.A training golf club with a spring-loaded hinge between two club half-shafts which "breaks" if the club swing is skewed or jerky is disclosed. First and second main hinge components lie side by side with a pivot shaft passing through them and with offset shanks for attachment to the club half-shafts. Springs and balls are located in bores in the first main hinge component, the balls engaging in depressions in a circular track on the second main hinge component when the two shanks are aligned. The other ends of the springs bear, via balls, against an adjustment ring. On rotation of this ring, the balls engage in one of a plurality of sets of depressions of different depths in the ring, so adjusting the "break" force of the hinge.</p> |
