Title:
RACKET FRAME
Document Type and Number:
Japanese Patent JP3295905
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enhance a vibration damping factor, and reduce weight while holding strength and rigidity of a racket frame.
SOLUTION: In a fiber reinforced resin racket frame 10 composed of a fiber reinforced resin 21 and a matrix resin 20, in a thickness directional cross section of the frame, the part where the matrix resin 20 of an inner layer is formed of a thermosetting resin and the matrix resin 21 of an outer layer is formed of a thermoplastic resin, is arranged in a range of 50 to 150 mm in the lengthwise direction in the part having a large vibration width of the racket frame generated at ball hitting time. This arranging place is desirably set to a range of 25% to 75% from the grip end to the frame total length.
Inventors:
Kunio Niwa
Application Number:
JP2940298A
Publication Date:
June 24, 2002
Filing Date:
February 12, 1998
Export Citation:
Assignee:
Sumitomo Rubber Industries, Ltd.
International Classes:
A63B49/10; A63B60/54; A63B102/02; A63B102/04; A63B102/06; (IPC1-7): A63B49/10
Domestic Patent References:
| JP9313650A | ||||
| JP4263936A | ||||
| JP9122275A |
Attorney, Agent or Firm:
Kazumi Owada