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 specifically 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 possible for tension forces produced on ball impact to be transmitted to other parts of the array of strings not contacting the ball.
Claims39
A racquetball for hitting a racquetball comprising a frame, a handle fixed thereto and having a plruality of separate string elements strung acorss the frame in the form of a plruality of generally parallel string lengths crossing the frame in a first direction and a plurality of generally parallel string lengths crossing the frame in a second direction, said string elements being trained around low friction support points secured to the frame wherein the directly adjacent string lengths crossing the frame in one direction are parts of different ones of said plurality of separate string elements and wherein the spacing between parallel string lengths of the same string element of said plurality of separate string elements is equal to at least about one racquetball radius.
As squash racket for hitting a squash ball comprising a frame, a handle fixed thereto and having a plurality of separate string elements strung across the frame in the form of a plurality of generally parallel string lengths crossing the frame in a first direction and a plurality of generally parallel string lengths crossing the frame in a second direction, said string elements being trained around low friction support points secured to the frame wherein the directly adajacent string lengths crossing the frame in one direction are parts of different ones of said plurality of separate string elements and wherein the spacing between parallel string lengths of the string element of said plurality of separate string elements is equal to at least about one squash ball radius.
A racquetball racket, for use in hitting racequetball ball having a predetermined radius, comprised of
- a frame having a longitudinal axis, side portions, a plurality of low friction points spaced about said frame and an outside surface,
- a hollow handle fixed to said frame and a plurality of separate string elements strung across substantially the entire area defined within said frame,
- said frame being strung so that each of said plurality of separate string elements are passed through said frame such that each string element passes over at least one of said plurality of low friction points so that said plurality of string elements are movable relative to said frame at said low friction points, and wherein directly adjacent parallel portions of string elements comprise portions of different ones of said plurality of separate string elements, so that parallel portions of string elements comprised of the same string element are spaced apart a distance equal to at least about said racquetball ball radius, and so that at least a portion of each of said plurality of separate string elements extends along at least a portion of the outside surface of said frame, and
- tension adjusting means porovided in said hollow handle for receiving each of said plurality of string elements and for simultaneously tensioning said plurality of separate string elements by causing movement of said plurality of string elements relative to the frame.
A squash racket for use in hitting a squash ball having a predetermined radius, comprised of
- a frame having a longitudinal axis, side portions, a plurality of low friction points spaced about said frame and an outside surface,
- a hollow handle fixed to said frame and a plurality of separate string elements strung across substantially the entire area defined within said frame,
- said frame being strung so that each of said plurality of separate string elements are passed through said frame such that each string element passes over at least one of said plurality of low friction points so that said plurality of string elements are movable relative to said frame at said low friction points, and wherein directly adjacent parallel portions of string elements comprise portions of different ones of said plurality of separate string elements, so that parallel portions of string elements comprised of the same string element are spaced apart a distance equal to at least about said squash ball radius, and so that at least a portion of each of said plurality of separate string elements extends along at least a portion of the outside surface of said frame, and
- tension adjusting means provided in said hollow handle for receiving each of said plurality of string elements and for simultaneously tensioning said plurality of separate string elements by causing movement of said plurality of string elements relative to the frame.
A racquetball racket for use in hitting racquetball balls comprising:
- a frame having a head portion and a 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 moveable 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 not less than about the radius of a said racquetball ball, and
- tension adjusting means provided on said racket for simultaneously tensioning said plurality of string elements.
A squash racket for use in hitting squash balls comprising:
- a frame having a head and handle portion, a plurality of low friction points are 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 moveable 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 not less than about the radius of a said squash ball, and
- tension adjusting means provided on said racket for simultaneously tensioning said plurality of string elements.
A racquetball racket for use in hitting a racquetball ball comprising:
- a frame having a head portion and handle portion, a plurality of low friction elements at spaced apart locations about said 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 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 racquetball ball cannot simultaneously 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 substantially all strings striking a racquetball ball impinging upon the frame head portion can elongate in both directions from the area of engagement with the struck ball to provide elasticity, and tension adjusting means connected to said first and second sets of string elements for simultaneously tensioning said string elements.
A squash racket for use in hitting a squash ball comprising:
- a frame having a head portion and handle portion, a plurality of low friction elements at spaced apart locations about said head portion, and first and second sets of plural operative string elements each having a plurality of substantially parallel lengths extendings 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 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 squash ball cannot simultaneously 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 substantially all strings striking a squash ball impinging upon the frame head portion can elongate in both directions from the area of engagement with the struck ball to provide elasticity, and tension adjusting means connected to said first and second sets of string elements for simultaneously tensioning said string elements.
A method of making a racket comprising:
- selecting a ball to be hit by the racket;
- providing a frame having a handle fixed thereto;
- securing a plurality of low-friction support points to said frame about the periphery thereof;
- stringing a plurality of separate string elements across the frame in the form of a plurality of generally parallel string lengths crossing the frame in a direction and a plurality of generally parallel string lengths crossing the frame in a second direction, said step of stringing including training string elements around said low friction support points;
- the step of stringing further including the steps of passing the string across the frame in a manner such that the directly adjacent string lengths crossing the frame in one direction are parts of different ones of said plurality of separate string elements and such that the spacing between parallel string lengths of the same string elements of said plurality of separate string elements is equal to at least about one ball radius.
Dependencies are inferred from the claim text.