Games using tangible projectile – Player held and powered – nonmechanical projector – per se,... – With sound-deadening – vibration-damping – or shock-absorbing...
Reexamination Certificate
2001-03-13
2003-03-11
Chiu, Raleigh W. (Department: 3711)
Games using tangible projectile
Player held and powered, nonmechanical projector, per se,...
With sound-deadening, vibration-damping, or shock-absorbing...
C473S539000, C473S548000, C473S534000
Reexamination Certificate
active
06530851
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention pertains to a ball racket, and more particularly, a tennis racket having a handle, a tension frame and stringing. The racket has a core and handle shaft connecting the handle to the tension frame. The tension frame has a profile for holding the strings in tension with a dampening mechanism for causing string tension
A ball racket (U.S. Pat No. 5,458,331) is already known with a tension frame forming the racket head that is of a two-part design, with an inner frame profile adjacent to the stringing and an outer frame profile in relation to the stringing on which the eyelets for fastening the strings forming the stringing are located. Both profiles overlap in such a manner that they form two chambers of variable volume extending along the tension frame between the two profiles on both sides from one plane of the stringing (stringing plane), which (chambers) are sealed toward the outside and can be pressurized by means of a valve with a fluid that is under pressure, for example with pressurized CO
2
gas. The purpose of this is to achieve the best possible tension.
The object of the present invention is to provide a ball racket, in particular a tennis racket, with improved playing properties.
SUMMARY OF THE INVENTION
To achieve this object, a ball racket with a racket head formed by a tension frame with stringing and by a handle element connecting to the tension frame is provided. The tension frame contains two parts in at least one portion of the racket head and has a tension frame profile adjacent to the stringing for holding the strings. The tension string profile holds the strings in a tensioned or dampened state.
REFERENCES:
patent: 360468 (1887-04-01), Phelps
patent: 1542177 (1925-06-01), Rose
patent: 3884467 (1975-05-01), Sommer
patent: 4772021 (1988-09-01), Maynard
patent: 5102132 (1992-04-01), Chen
patent: 5165687 (1992-11-01), Soong
patent: 5368297 (1994-11-01), Liu
patent: 5458331 (1995-10-01), Bothwell
patent: 5762570 (1998-06-01), Shaw
patent: 5944625 (1999-08-01), Janes
patent: 3432422 (1986-03-01), None
patent: 3806038 (1989-09-01), None
patent: 4104988 (1992-08-01), None
patent: 320183 (1929-10-01), None
patent: 90/02584 (1990-03-01), None
Chiu Raleigh W.
Hoffman Wasson & Gitler PC
Volkl Tennis GmbH
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