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US 5,314,180 AGranted
Sports instrument and impact-absorbing element to be attached to sports equipment
AssigneeToray Industries, Inc.
InventorsMasahiro Yamagishi, Masao Hijiri, Yasuo Komatsu, Hiroshi Edagawa, Naoki Imaeda
Life of this patent
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Abstract
This invention relates to sports rackets with which the impact or vibration transmitted to the body such as the arms, of a user when the sports racket is used is largely reduced. The sports racket according to the present invention comprises as at least a part of the material constituting said sports racket a vibration-reducing material having a vibration loss coefficient of not less than 0.01 at room temperature, comprising epoxy resin, polyamide resin, and a filler.
Claims13
A sports racket having a vibration-reducing material embedded therein,
- wherein the vibration-reducing material has a vibration loss coefficient of not less than 0.01 at room temperature,
- wherein said vibration-reducing material is a thermally cured material of the following components as major constituents:
- (a) an epoxy resin which possesses flowability at a temperature between room temperature and 100.degree. C.,
- (b) a polyamide resin which possesses flowability at a temperature between room temperature and 100.degree. C., and
- (c) an inorganic filler selected from the group consisting of graphite, ferrite and mica;
- and wherein, the sports racket is selected from the group consisting of:
- a tennis racket,
- a racket ball racket, and
- a squash ball racket.
6 more elements
Dependencies are inferred from the claim text.