Tensionable racket having unique stringing pattern
OwnerHerwig Fischerinventor
Life of this patent
Estimating the term…
Abstract
The lengths of string (22 and 24) of a racket, more specially a tennis or squash racket, are trained over bend points of the frame (12) with a low degree of friction and are so strung backwards and forwards across the frame that the spacing between two parallel strings of the same length of string (22) is at least equal to the radius of a ball. Between these strings (22c and 22d) there are parallel strings (24d), that are parts of other string lengths (24). This system of stringing the frame makes it posible for tension forces produced on ball impact to be transmitted to other parts of the array of strings not contacting the ball.
Claims11
A tennis racket for use in hitting tennis balls comprising:
- a frame having a head and handle portion, a plurality of low friction points at spaced apart locations about said head portion,
- a plurality of string elements, each of said string elements having a plurality of substantially parallel passes extending in only one direction across the area defined within the head portion and over a predetermined series of individual ones of said plurality of low friction points so that the parallel passes are movable relative to said frame at said low friction points,
- said frame being strung with directly adjacent substantially parallel passes comprising portions of different string elements and so that the substantially parallel passes of the same string element are spaced apart a distance generally not less than about the radius of said tennis ball, and
- tension adjusting means provided on said racket for simultaneously tensioning said plurality of string segments.
A tennis racket for use in hitting a tennis ball comprising:
- a frame having a head and a handle portion, a plurality of low friction elements at spaced apart locations about said frame head portion, and first and second sets of plural operative string elements each having a plurality of substantially parallel lengths extending across the frame in only one direction and being spaced apart within said frame head portion, lengths of different ones of said string elements within the same one of said first and second string sets being interleaved interwoven said first and second string sets crossing within said frame, said lengths of said string elements being spaced apart within said frame a sufficient distance such that a struck tennis ball cannot substantially strike more than one length of the same string element, each of said string elements passing over a predetermined series of individual ones of said plurality of low friction elements so that said plurality of string elements are movable relative to said frame at said low friction elements, whereby all strings striking a tennis ball impinging upon the frame head portion can elongate both directions from the area of engagement with the struck tennis ball to provide elasticity, and tension adjusting means connected to said first and second sets of string elements for simultaneously tensioning said string elements.
Dependencies are inferred from the claim text.