Sport racquet

a manufacturing method and technology for sports racquets, applied in the field of sports racquets, can solve the problems of weakening the molded frame, high production cost, and higher purchasing cost of the final consumer,
US20110152016A1Inactive Publication Date: 2011-06-23GAZZARA ROBERT +3
14 Cites 5 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
GAZZARA ROBERT
Publication Date
2011-06-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a method for manufacturing at least a portion of a sports racquet frame that comprises a step a) of providing a moldable tube structure containing a first inflatable bladder and a second inflatable bladder. The first and second inflatable bladders are positioned on opposite first and second regions of the moldable tube structure. At an intermediate region, the tube structure comprises one or more cross channels, which pass through the moldable tube structure. The method according to the present invention comprises also a further step b) of inserting said tube structure inside a mold forming a mold cavity of a desired shape. Mold members are inserted into the cross channels of the tube structure, so that the outer surface of the mold member faces the inner surface of the corresponding cross channel. The mold members have position and orientation that correspond to the position and orientation, along the string bed plane, of the string port holes, which are to be formed on said frame portion. The method, according to the present invention, comprises also a step c) of pressurizing the first and second bladders, so that the tube structure conforms to the shape of the mold, and heating the mold, so that the tube structure cures. The method, according to the present invention, comprises a further step d) of removing the cured tube structure from the mold cavity and removing the mold members from the cross channels.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present invention is a divisional of U.S. application Ser. No. 11 / 707,845, filed on Feb. 15, 2007.BACKGROUND

[0002] The present invention relates to a method for manufacturing a sports racquet and a sports racquet obtained by said method, which may be, for example a tennis, squash, badminton, or racquetball racquet. More particularly, the present invention relates to an improved method for manufacturing a sports racquet comprising a racquet frame formed by a single tube and provided with enlarged string port holes therein.

[0003] Sports racquets have a head portion containing an interwoven string bed, a handle, and a shaft portion connecting the head portion to the handle.

[0004] In conventional racquets, holes for anchoring the ends of the strings are formed in the frame by drilling small string holes in the frame after the racquet is molded. Generally, each string hole accommodates a single string. Plastic grommet pegs, which are formed o...

Claims

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