RACQUET CONFIGURED WITH FEWER CROSS STRINGS THAN MAIN STRINGS

摘要

A racquet includes polyester, monofilament racquet string and a frame extending along a longitudinal axis and including a head portion coupled to a handle portion. The head portion includes a hoop having inner and outer peripheral walls. The hoop defines a head size having maximum longitudinal and transverse dimensions, a, and, b, respectively. The dimension a is at least 1.2 times the dimension b. The inner peripheral wall includes string holes. The string has a diameter within the range of 1.10 to 1.55 millimeters. The string forms a string bed of interlaced main and cross string segments. Each of the cross segments transversely extends from one of the string holes to another, and each of the main segments longitudinally extends from one of the string holes to another. The string bed has at least one more main segment than cross segment. At least one of the main segments contacting the tennis ball exhibits a snap back velocity of at least 1 meter per second.

主权项

1. A tennis racquet capable of being tested under a tennis ball spin test under which the racquet is securely mounted to a test fixture by four spaced apart mounts such that a plane defined by a string bed is positioned 30 degrees from horizontal, a tennis ball is projected from a ball projecting machine to the string bed at a speed within the range of 38 to 42 miles per hour from an angle that is 50 degrees from an axis normal to the plane of the string bed, and the ball and the string bed are monitored under a high speed video system at 5000 frames per second, the racquet comprising:
a frame extending along a longitudinal axis and including a head portion coupled to a handle portion, the head portion including a hoop having inner and outer peripheral walls, the hoop defining a head size having a maximum longitudinal dimension, a, and having a maximum transverse dimension, b, the longitudinal dimension a being at least 1.2 times the transverse dimension b, the inner peripheral wall including a plurality of string holes; and a quantity of polyester, monofilament racquet string coupled to the head portion to form the string bed, the string bed including a plurality of cross string segments interlaced with a plurality of main string segments, each of the cross string segments transversely extending from one of the string holes to another one of the string holes, and each of the main string segments substantially longitudinally extending from one of the string holes to another one of the string holes, the string bed having at least one more main string segment than cross string segment, the quantity of racquet string capable of being strung at a predetermined string tension, when tested under the tennis ball spin test with the string bed being strung with the string at a string tension of 60 lbs, at least one of the main string segments contacting the tennis ball exhibits a snap back velocity of at least 1 meter per second, the number of main string holes and the number of cross string holes being such that the plurality of main string segments of the string bed is less than 23 main string segments, and the plurality of cross string segments of the string bed is less than 20 cross string segments.