Prince Sports, Inc.

Abg Prince Italy Srl

Mauro Pinaffo

Mauro Pezzato

Roberto Gazzara

Michele Pozzobon

Stephen J Davis

Stefano Conte

Michel Pozzobon

Roberto Gazzarra

String bed design for a tennis racquet

A sports racquet having a plurality of string port holes and conventional string holes is formed of a single tube of prepreg material. When molded, mold elements press opposed portions of the prepreg tube into contact with one another, and shape the adjoining prepreg material into a string port hole blanks. The portion of the pressed-together material which initially blocks the string port hole is removed after molding so that the string port holes extend through the frame. Alternatively, the mold elements cause the prepreg tube to follow a serpentine shape, thereby defining string port holes which are open alternately along the top and bottom surface of the frame. A pair of cover rings may be secured to the top and bottom racquet surfaces to cover the open sides of the string port holes.

Sports racquet with string port holes

A skate frame comprises a lower frame portion comprising gliding means for running on a gliding surface and an upper frame portion comprising one or more support surfaces for supporting the user's boot. Both the frame portions comprise protruding arms that are mechanically coupled. The mutual interlock between the coupling surfaces of said protruding arms prevent relative movements between the frame portions along predefined directions.

Frame structure for skates

A sports racquet comprising a handle portion, a paddle portion, which is provided with at least a solid ball striking surface, and a neck portion, which rigidly connects said handle portion and said paddle portion. The paddle portion comprises at least a first cavity having a first longitudinal axis, which is substantially unperpendicular to said main reference plane.

Sports racquet structure

An archery bow is formed of multiple composite tubes bonded to one another along a common wall, wherein apertures, or 'ports,' are molded between the tubes to improve the stiffness, strength, resiliency, control, and aerodynamics of the bow.

Archery bow having a multiple-tube structure

A sports racquet frame is formed from a plurality of frame sections, some sections formed of a single tubular member and other sections formed of double tubular members. The double tube sections preferably contain string port holes. Also, different frame sections can be made of different materials, e.g., carbon fiber-reinforced composites and aluminum.

Sports racquet with multi-section frame

A racquet frame has one or more string holes formed therein and a string bed plane, along which the string holes extend. The racquet frame is preferably formed by providing a frame bearing structure, which is aimed at providing flexural stiffness to said racquet frame, and structurally integrating the frame bearing structure with a frame binding structure, which is aimed at providing torsional stiffness to the racquet frame. The mutual integration of the frame bearing structure and the frame binding structure forms a composite frame structure, in which one or more of said string holes may be provided.

Method for manufacturing a racquet frame for sports racquet and a racquet frame thereof

A method of manufacturing a structure using a single, hollow primary tube, preferably of a composite material, wherein ports are bonded to the walls of the hollow tube through aligned holes on opposite sides of the hollow tube. The ports improve the stiffness, strength, aerodynamics, and aesthetics of the structure.

Method of manufacturing composite single-tubed structures having ports

A handle is adapted to be held by a player and a striking end is adapted to contact and propel an object A structure for a hockey stick is described by using multiple composite tubes bonded to one another, wherein apertures, or 'ports,' are molded between the tubes to improve the stiffness, strength, aerodynamics and comfort of the hockey stick.

Shaft for a sports stick such as a hockey stick

A structure for a bat is described by using multiple composite tubes bonded to one another, wherein apertures, or 'ports,' are molded between the tubes to improve the stiffness, strength, aerodynamics and comfort of the bat.

Composite bat having a multiple tube structure

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.

Method for manufacturing a sports racquet

A handle end is adapted to be held by a player and a striking end is adapted to contact and propel an object. The stick includes a shaft coupling the handle end and the striking end. The shaft is fabricated of a relatively rigid material with limited flexibility. The shaft has a hole extending there through with a cylindrical wall defining the hole for varying the playing characteristics of the system.

Composite hockey stick system

A handle is adapted to be held by a player and a striking end is adapted to contact and propel an object. A structure for a hockey stick is described by using a single, hollow tube of composite material, wherein tubular 'ports' extend through the hollow tube. The ends of the ports are bonded to the walls of the hollow tube. The ports improve the stiffness, strength, aerodynamics and comfort of the hockey stick.

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Camposampiero, Italy

Mauro Pinaffo