发明名称 RACQUET HAVING ELONGATED GROMMET BARRELS WITH IMPROVED DAMPING CHARACTERISTICS
摘要 A sports racquet with enhanced string vibration damping has grommets with elongated barrels on many of the cross strings. The internal diameter of the barrels is selected so as to preserve a minimum clearance between the cross string and its enclosing barrel, thereby mitigating vibration. The barrel lengths vary as a function of their distance from the top of the frame, so that their free ends are positioned near the nearest main string.
申请公布号 US2014335979(A1) 申请公布日期 2014.11.13
申请号 US201313890846 申请日期 2013.05.09
申请人 EF COMPOSITE TECHNOLOGIES, L.P. 发明人 GRIMES Ronald A.
分类号 A63B59/00;A63B51/00;A63B49/00 主分类号 A63B59/00
代理机构 代理人
主权项 1. A sports racquet comprising: a racquet frame having an axis, a head of the racquet frame laterally surrounding a string bed, the head having a lateral interior surface, the string bed residing in a string bed plane, a string bed boundary formed by the intersection of the interior surface of the head and the string bed plane; a plurality of spaced-apart grommet holes formed through the frame and disposed around at least a portion of the head; the string bed having a plurality of strings including main strings and cross strings, the cross strings strung at an angle to the axis, strung in spaced relation to each other, and strung to intersect the main strings, at least some of the cross strings received into respective grommet holes in the head, an outer length of the cross string defined to extend between the string bed boundary and an intersection of the cross string with the nearest main string; each of the grommet holes being provided with a grommet, a plurality of elongated, vibration-dampening barrels formed as portions of ones of the grommets, each barrel enclosing a respective enclosed cross string, each barrel extending through a grommet hole and extending into the string bed, the barrel covering at least about 75% of said outer length.
地址 Carlsbad CA US