JP2014503337A5

JP2014503337A5 -

Info

Publication number: JP2014503337A5
Application number: JP2013552012A
Authority: JP
Filing date: 2012-01-18
Publication date: 2015-02-12

Claims

A sports racket,
A racquet body including a racquet head and a racquet handle, wherein the racquet head has a substantially rectangular hitting face shape, and includes a corner portion in which the substantially rectangular hitting face shape is rounded. A racket body defining a plurality of gut mounting positions in a predetermined arrangement on four opposing sides of the rectangular striking face shape, wherein the racket handle is fixed to the racket head;
At least one gut mounted at the gut mounting position, wherein the gut defines a plurality of main gut portions and a plurality of cross gut portions, each of the main gut portions being approximately equal in length and approximately equal. A sports racquet comprising: at least one gut that is tensioned and each of said cross gut portions is approximately equal length and approximately equal tension.

The sports racket according to claim 1, wherein the main gut portion and the cross gut portion have a gut tension that is substantially equal when stretched over the racket head.

The rectangular racket head is formed in a shape having a side curved outward so that the side of the racket head is drawn by the gut tension to become a substantially straight side when stretched. The sports racket according to 1.

A sports racket,
A racket body including a racket head and a racket handle, wherein the racket head has a substantially rectangular hitting surface shape, and includes a corner portion in which the substantially rectangular hitting surface shape is rounded, and the packet head includes: A racket body defining a plurality of gut mounting positions in a predetermined arrangement on four opposing sides of the rectangular striking face shape, wherein the racket handle is fixed to the racket head;
At least one gut mounted at the plurality of gut mounting positions, wherein the gut defines a plurality of main gut portions and a plurality of cross gut portions, and each of the main gut portions has a main gut frequency. A sports racquet comprising: a main gut fundamental frequency each being substantially the same, and said cross gut portions each having at least one gut each having a cross gut fundamental frequency that is substantially the same. .

The at least one gut has a substantially constant gut linear density;
and,

Where ti is the gut tension of the main gut portion, li is the gut length of the main gut portion, sj is the gut tension of the cross gut portion, and kj is the gut length of the cross gut portion. Item 5. A sports racket according to item 4 .

The at least one gut has a varying gut linear density;
and,

Where ti is the gut tension of the main gut portion, mi is the gut density of the main gut portion, li is the gut length of the main gut portion, sj is the gut tension of the cross gut portion, and m′j is The sports racket according to claim 4 , wherein a gut density of the cross gut portion, kj is a gut length of the cross gut portion.

The sports racket according to claim 4 , wherein

The sports racquet of claim 4 , further comprising a lockable grommet attached to at least some of the gut attachment locations to hold the gut portion in place.

The sports racquet of claim 4, further comprising a lockable grommet that holds the gut portion in place at one end of each of the main gut portions and one end of each of the cross gut portions.

The sports racket according to claim 4 , further comprising a lockable grommet that holds the gut in place at each end of each of the main guts and each of the cross guts.

The sports racquet of claim 8 , wherein the lockable grommet holds the gut portion in the gut mounting position such that a predetermined tension on a predetermined one of the gut portions is maintained.

The lockable grommets of the cross gut portions maintain tension against the cross gut portions, thereby

Where sj is the tension on the intersecting gut portion, kj is the length of the intersecting gut portion,
The lockable grommets of the main gut portion maintain tension against the main gut portion, thereby

The sports racket according to claim 11 , wherein ti is a tension with respect to the main gut portion, and li is a length of the main gut portion.

The lockable grommets of the cross gut portions maintain tension against the cross gut portions, thereby

Where sj is the tension on the intersecting gut portion, m′j is the mass density of the intersecting gut portion, and kj is the length of the intersecting gut portion,
The lockable grommets of the main gut portion maintain tension against the main gut portion, thereby

The sports racket according to claim 11 , wherein ti is a tension with respect to the main gut portion, mi is a mass density of the main gut portion, and li is a length of the main gut portion.

A sports racket,
A racket head including an open frame, the racket head defining an array of a plurality of gut holes on opposite sides of the open frame, the gut holes including a generally conical hole portion;
A handle fixed to the racket head;
At least one gut disposed through the gut hole and extending across the open frame to define a racket striking surface;
A plurality of lockable grommets disposed in each of the gut holes, the grommets including a generally conical grommet portion that is inserted into the generally conical hole portion; Lockable, wherein the lockable grommet engages and restrains the at least one gut under tension by frictional engagement between a conical hole portion and the generally conical grommet portion and the gut. Sports racket with a special grommet.

A sports racket,
A racket head including an open frame, wherein the racket head defines an array of gut holes including generally conical hole portions on opposite sides of the open frame, wherein the generally conical hole portions are threaded. When,
A handle fixed to the racket head;
At least one gut disposed through the gut hole and extending across the open frame to define a racket striking surface;
A plurality of lockable grommets disposed in each of the gut holes, wherein the lockable grommets are threaded into the threaded generally conical hole portions. A substantially conical grommet portion, and the lockable engagement by a threaded engagement between the threaded generally conical hole portion and the threaded generally conical grommet portion and the gut. A sports racquet comprising a lockable grommet, wherein the grommet engages and restrains the at least one gut under tension.

A sports racket,
A racquet head including an open frame, the racquet head defining an array of gut holes including generally conical hole portions on opposite sides of the open frame; and
A handle fixed to the racket head;
At least one gut disposed through the gut hole and extending across the open frame to define a racket striking surface;
A plurality of lockable grommets disposed in each of the gut holes, wherein the lockable grommets are substantially cylindrical rods disposed in the substantially conical hole portions. Each includes a lockable grommet that includes a stop block in each of the generally conical holes, and wherein the at least one gut is under tension by causing the generally cylindrical rod to bite into the generally conical holes. Lockable by holding in place and with the generally cylindrical rod pulling the at least one gut through the grommet to increase tension on the gut while preventing the gut from moving in the opposite direction Sports racket with a special grommet.

A sports racket,
A racket head including an open frame, the racket head defining an array of gut holes on opposite sides of the open frame;
A handle fixed to the racket head;
At least one gut disposed through the gut hole and extending across the open frame to define a racket striking surface;
A plurality of lockable grommets disposed in each of the gut holes, wherein the lockable grommets include first and second locking portions and a biasing member; A biasing member biases the first and second locking portions toward each other to engage the at least one gut, holding the at least one gut under tension, and And a second locking member that allows the at least one gut to move through the locking portion in a direction that increases tension on the gut while preventing the gut from moving in the opposite direction. Sports racket with a special grommet.

A sports racket,
A racket head including an open frame, the racket head defining an array of gut holes on opposite sides of the open frame;
A handle fixed to the racket head;
At least one gut disposed through the gut hole and extending across the open frame to define a racket striking surface;
A plurality of lockable grommets disposed in each of the gut holes, wherein the lockable grommets include a gut passage, a threaded bore opening on the gut passage, and the screw. A threaded member that is threadably engaged within a threaded bore, wherein the threaded member contacts the at least one gut within the gut path and causes the at least one gut to pass through the gut path. A sports racket comprising a lockable grommet that is secured within.

The sports racquet of claim 18 , further comprising an outer block defining the gut passage and the threaded bore, with the threaded member engaged therein.

The sports racquet of claim 18 , further comprising a portion of the racquet head that defines the threaded bore and into which the threaded member is engaged.

A sports racket,
A racket head including an open frame, the racket head defining an array of gut holes on opposite sides of the open frame;
A handle fixed to the racket head;
At least one gut disposed through the gut hole and extending across the open frame to define a racket striking surface;
A plurality of lockable grommets disposed in each of the gut holes, each of the lockable grommets including a compressible elastic gut gripping element that engages the gut; Each of the lockable grommets includes a threaded cone engaged with the gripping element to compress the gripping element and thereby secure the gut in place. A sports racquet comprising a lockable grommet including a threaded nut that is threadably engaged onto a cone of the same.

A sports racket,
A racket head including an open frame, the racket head defining an array of gut holes on opposite sides of the open frame;
A handle fixed to the racket head;
At least one gut disposed through the gut hole and extending across the open frame to define a racket striking surface;
A plurality of lockable grommets disposed in each of the gut holes, each of the lockable grommets including a compressible elastic gut gripping element that engages the gut; The gut gripping element is held in a threaded nut, a threaded portion is provided in the gut hole, and the thread on the gut hole to hold the gut in the gut hole under tension. A sports racket comprising a lockable grommet with a threaded nut engaged thereto.