发明名称 Racket with anti-shock air cushion
摘要 A racket with anti-shock air cushions, constructed with poly-urethane air cushions provided at a lower end of the frame closely spaced with connecting tube passing therethrough. Inflation and exhaust elements are provided below the lower end of the frame and between two throats, thereby properly regulating the air cushions and attaining an optimal anti-shock effect.
申请公布号 US5083776(A) 申请公布日期 1992.01.28
申请号 US19910665658 申请日期 1991.03.07
申请人 LIU, JEFFREY 发明人 LIU, JEFFREY
分类号 A63B59/00 主分类号 A63B59/00
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