| 摘要 |
PCT No. PCT/SU84/00055 Sec. 371 Date Jun. 6, 1986 Sec. 102(e) Date Jun. 6, 1986 PCT Filed Oct. 24, 1984 PCT Pub. No. WO86/02572 PCT Pub. Date May 9, 1986.A ball throwing device comprising a pusher (16) operatively associated with a striker (12) through a timing mechanism (21) which incorporates a crank (22) set on a drive axle (23) and linked to the pusher (16). The crank (22) is adapted to rotate together with the drive axle (23) at the same speed, and also at a speed higher than the axle speed when the pusher (16) causes the ball (6) to move to the stroke position. Respective projections (31, 32) are provided on the drive axle (23) and on the crank (22), adapted to interact with each other. Such a projection (33) is also formed on the striker (12), while a yoke (36) is fixed stationary on the casing of the drive (24) and a spring-actuated stop (34) is made on the crank (22), the stop being adapted to interact with the striker projection (33) and with the yoke (36). |
