发明名称 Tennis racquet with high friction stringing - has friction inserts with V-shape grooves wedged at crossing point of strings
摘要 <p>The tennis racket has crossing strings which tend to loose their proper spacing during play. to prevent the strings (3, 4) from sliding relative to each other a grooved insert (5) is located at each point where two strings cross. The inserts, which are made from a material of a high friction coefficient, have also VEE-shaped string grooves to provide wedge location on the strings. The inserts (5) protrude above the strings (4, 3) on each side of the racket. They thus produce a racket surface which gives a high friction when in contact with a tennis ball. It is therefore easily possible to produce tennis strokes which provide plenty of ball spin.</p>
申请公布号 DE2642978(A1) 申请公布日期 1978.03.30
申请号 DE19762642978 申请日期 1976.09.24
申请人 SOMMER,REINHOLD 发明人 SOMMER,REINHOLD
分类号 A63B51/10;(IPC1-7):63B51/10 主分类号 A63B51/10
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