US20080102995A1 - Racket - Google Patents

Racket Download PDF

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Publication number
US20080102995A1
US20080102995A1 US11/977,018 US97701807A US2008102995A1 US 20080102995 A1 US20080102995 A1 US 20080102995A1 US 97701807 A US97701807 A US 97701807A US 2008102995 A1 US2008102995 A1 US 2008102995A1
Authority
US
United States
Prior art keywords
ball
frame
racket
strings
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/977,018
Other languages
English (en)
Inventor
Chia-Yuan Chang
Feng-Hsiang Chang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to CHIA-YUAN CHANG reassignment CHIA-YUAN CHANG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHANG, CHIA-YUAN, CHANG, FENG-HSIANG
Publication of US20080102995A1 publication Critical patent/US20080102995A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/08—Frames with special construction of the handle
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/08—Diagonal stringing
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/002—Resonance frequency related characteristics

Definitions

  • the present invention relates to a racket for ball games, more particularly to a racket for ball games having a stringed web that may be combined with a handle of different rigidity or flexibility so as to produce various ball-striking effects and to fit users or players of various playing skill and strength, and specifically a 10 stringed web that produces a greater ball striking effect, so as to extensively increase the speed of racket swing and ball rebound as well as stability in hitting.
  • FIG. 1 shows a conventional racket 1 for ball games comprising a handle 3 and a racket head with a frame 2 connected to the handle 3 and supporting a stringed web 4 that forms the hitting face of the racket 1 .
  • a badminton racket with a substantially oval-shape racket head is described herein as the representative prior art, and the shuttlecock used in relation thereto is termed herein generally as the “ball.”
  • the frame 2 has a lower end 21 connected to the handle 3 and an upper end 22 opposite to the handle 3 .
  • a longitudinal axis X extends from the lower end 21 to the upper end 22 .
  • the handle 3 includes a shaft portion 32 connected to the frame 2 and a grip portion 31 connected to the shaft portion 32 .
  • the shaft portion 32 is generally made of alloy (such as titanium alloy or aluminum alloy) or composite material 2 (such as carbon fibers).
  • a stringed web 4 is formed by a plurality of longitudinal strings 41 running generally parallel to the longitudinal axis X, and a plurality of transversal strings 42 running generally perpendicular to the longitudinal axis X and intersecting the longitudinal strings 41 to define a plurality of meshes 40 .
  • the longitudinal strings 41 and transversal strings 42 further define a primary ball-striking portion C on a substantially central region of the web 4 and a secondary ball-striking portion D extending from the outer periphery of the primary ball-striking portion C to the frame 2 .
  • the secondary ball-striking portion D has an upper section D 2 extending from the primary ball-striking portion C to the upper end 22 of the frame 2 and a lower section D 1 extending from the primary ball-striking portion C to the lower end 21 of the frame 2 .
  • the meshes 40 located within the primary ball-striking portion C, defined by the longitudinal strings 41 and the transversal strings 42 are substantially equal in size.
  • the distance between two adjacent transversal strings 42 located at the lower section D 1 outside the primary ball-striking portion C gradually increases in a direction towards the lower end 21 of the frame 2 .
  • the distance between two adjacent ones of the transversal strings 42 located at the upper section D 2 outside the primary ball-striking portion C gradually increases in a direction toward the upper end 22 of the frame 2 .
  • the meshes 40 located outside the primary ball-striking portion C gradually increase in size in a direction from around the primary ball-striking portion C toward the lower end 21 and toward the upper end 22 of the frame 2 .
  • the primary ball-striking portion C where the transversal strings are more closely spaced and the meshes 40 are smaller in size, is provided with a stiffer ball-hitting face and consequently produces greater ball rebound speed.
  • the optimal ball-hitting area, called the “sweet spot” of the racket 1 falls mainly on the center of the primary ball-striking portion C. When the impact of the ball is at the center of the primary ball-striking portion C, an excellent hitting force is produced thus achieving a solid ball-striking effect.
  • the racket 1 has a shaft portion 32 that is more flexible and less rigid, swinging the racket can be more comfortable and relaxed; however, an excellent ball striking effect cannot be achieved if the ball is not hit at the sweet spot of the racket face. Meanwhile, to those players with good skill and strength, if the racket 1 is made of a shaft portion 32 that is less flexible and more rigid, the racket 1 can be swung at greater speed, however, the ball rebound speed and the hitting force are still subject to some limitations as explained above.
  • the racket comprises a handle, a frame connected to the handle, and has a longitudinal axis extending from and aligned with the handle.
  • the frame further having two ends that are opposite to each along the longitudinal axis, and a stringed web supported on the frame and formed by a plurality of longitudinal strings running generally parallel to the longitudinal axis and a plurality of transversal strings running generally perpendicular to the longitudinal axis and intersecting the longitudinal strings to define a plurality of meshes, the longitudinal strings and the transversal strings together further defining a primary ball-striking portion on a substantially central portion of the stringed web and a secondary ball-striking portion extending around the primary ball-striking portion, characterized by the fact that meshes located in the primary ball-striking portion gradually increase in size in a direction from one of the two ends of the frame to the other one of the two ends of the frame.
  • the frame has one end connected to the handle and another end opposite to the handle, and the meshes gradually increase in size from the other end to the one end of the frame or, in other words, the meshes gradually decrease in size from the one end to the other end of the frame.
  • FIG. 1 is a plan view illustrating a conventional prior art racket structure.
  • FIG. 2 is a plan view illustrating the racket of the present invention according to a first preferred embodiment.
  • FIG. 3 is a fragmentary, enlarged view showing the mesh design of the stringed web of the racket in the first preferred embodiment shown in FIG. 2 .
  • FIG. 4 is a plan view of a second preferred embodiment of the racket according to the present invention.
  • FIG. 5 is a fragmentary, enlarged view showing the mesh design of the stringed web of the racket in the second preferred embodiment shown in FIG. 4 .
  • inventions described herein may include any one or more of the features described in relation to other inventions. As such, various different embodiments may be configured with any element, feature, or step, disclosed herein, either alone or in combination.
  • the racket 5 comprises a handle 7 , a frame 6 extending from the handle 7 and a stringed web 8 supported on the frame 6 .
  • a badminton racket is described, but the present invention is not limited thereto and is applicable as well to other types of rackets such as tennis racket, squash racket and the like, all of which may be produced according to the concept of the present invention.
  • the frame 6 has a longitudinal axis X extending from and aligned with the handle 77 and two ends 61 , 62 that are opposite to each other along the longitudinal axis X, one end 61 being connected to the handle 7 and the other end 62 being opposite the handle 7 .
  • the handle 7 includes a shaft portion 72 connected to the end 61 of the frame 2 and a grip portion 71 connected to the shaft portion 72 .
  • the stringed web 8 is formed by a plurality of longitudinal strings 81 running generally parallel to the longitudinal axis X and a plurality of transversal strings 82 running generally perpendicular to the longitudinal axis X and intersecting the longitudinal strings 81 to define a plurality of meshes 80 .
  • the longitudinal strings 81 and transversal string 82 together further define a primary ball-striking portion A (the area bounded by the imaginary line as shown in FIG. 3 ), and a secondary ball-striking portion B which is the remaining portion of the stringed web 8 located at the outer bounds of the primary ball-striking portion A.
  • the meshes 80 bounded by the longitudinal strings 81 and transversal strings 82 and located in the primary ball-striking portion A gradually increase in size in a direction from the end 61 to the other end 62 of the frame 6 .
  • the stiffness of the stringed web 80 and hence the rebound force on the ball, conversely decreases gradually in that direction.
  • the greater the arm of force the greater is the torque generated i.e., the greater the distance from the grip portion 7 1 to the spot where the ball is hit, the greater is the hitting force on the ball.
  • the torque produced in striking the ball increases gradually in a direction from the end 61 to the other end 62 of the frame 6 .
  • the larger the mesh size of the stringed web 8 the less is the rebound force on the ball and vice versa, and the greater the distance of the impact spot to the grip portion 71 , the greater is the striking force on the ball, and vice versa. Accordingly, by the design of the racket 5 in this embodiment, the increase in the striking force on the ball in the upper area of the primary ball-striking portion A can compensate for the rebound force that is reduced due to the decrease in mesh size, and thus, the sweet spot can be evenly distributed over the entire primary ball-striking portion A. Consequently, regardless of where on the primary ball striking portion A the ball is hit, the striking force on the ball is rendered substantially uniform.
  • the racket 5 is made of a shaft portion 72 that is less rigid and is more flexible, a more relaxed and comfortable feeling of swinging the racket 5 can be provided. In view of this, the racket 5 according to this embodiment is suitable for players with ordinary playing skill and strength.
  • a second preferred embodiment of the racket 5 similarly comprises a handle 7 , a frame 6 connected to the handle 7 , and a stringed web 8 supported on the frame 6 .
  • a badminton racket is illustrated as an example.
  • the structural design described in the present invention may be used to produce a tennis racket, a squash racket and the like, and shall not be limited to the badminton racket described in this embodiment.
  • the second embodiment differs from the first in that, the meshes 80 located in the primary ball-striking portion A and bounded by the longitudinal strings 81 and the transversal strings 82 gradually increase in size in a direction from the other end 62 , which is the end opposite to the handle 7 , to the one end 61 , which is the end connected to the handle 7 , of the frame 6 . That is, in contrast to the first embodiment, the second embodiment has meshes 80 in the primary ball-striking portion A that gradually decrease in size in a direction from the one end 61 to the other end 62 of the frame 6 .
  • the distance between two adjacent transversal strings 82 located in the primary ball-striking portion A of the stringed web 8 gradually increases in a direction from the other end 62 to the one end 61 of the frame 6 or, in other words, the distance between two adjacent ones of the transversal strings 82 located in the primary ball-striking portion A of the stringed web 8 gradually decreases in a direction from the one end 61 to the other end 62 of the frame 6 .
  • the distance between two adjacent ones of the longitudinal strings 81 located in the primary ball-striking portion A of the stringed web 8 also gradually increases in a direction from the other end 62 to the one end 61 of the frame 6 , that is, the distance between two adjacent ones of the longitudinal strings 81 located in the primary bail-striking portion A of the stringed web 8 gradually decreases in a direction from the one end 61 to the other end 62 of the frame 6 .
  • the stiffest portion of the stringed web 8 with the greatest resulting torque is concentrated at the upper section of the primary ball-striking portion A (the area closer to the upper end 62 of the frame 6 ).
  • the stiffness of the stringed web 8 conversely gradually increases in that direction.
  • the torque generated on hitting the ball gradually increases in a direction from the one end 61 to the other end 62 of the frame 6 . Accordingly, at the upper section of the primary ball-striking portion A, because the stiffness of the stringed web 8 and the torque resulting therefrom are increased, a very large hitting force can be generated against the ball.
  • the racket 5 may be made with a shaft portion 72 that is more stiff and less flexible, so that the strong ball striking force against the ball can be enhanced even more, thereby increasing the power of the racket 5 and the ball rebound speed, and consequently achieving a powerful ball striking effect. Accordingly, the racket 5 in this embodiment is more suitable for players of good skill and strength.
  • the racket 5 may be arranged to suit players of different skill and strength by providing the shaft portion 72 with different hardness or rigidity. At the same time, the player may select the appropriate ball striking point on the primary ball-striking portion A to hit the ball so as to produce different impact force against the ball and thereby achieve the objectives of the present invention.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)
US11/977,018 2006-10-25 2007-10-22 Racket Abandoned US20080102995A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW095139333A TW200819169A (en) 2006-10-25 2006-10-25 Racket
TW095139333 2006-10-25

Publications (1)

Publication Number Publication Date
US20080102995A1 true US20080102995A1 (en) 2008-05-01

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ID=39330972

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/977,018 Abandoned US20080102995A1 (en) 2006-10-25 2007-10-22 Racket

Country Status (2)

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US (1) US20080102995A1 (fr)
TW (1) TW200819169A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102133472A (zh) * 2011-03-01 2011-07-27 常延秋 柔力荡球
CN103706089A (zh) * 2014-01-09 2014-04-09 宿迁傲达康复合材料有限公司 一种羽毛球拍及其制造方法
CN106573166A (zh) * 2014-08-12 2017-04-19 百保力公司 网球拍
EP3560559A1 (fr) * 2018-04-25 2019-10-30 Sumitomo Rubber Industries Limited Raquette de tennis avec différentes tailles de mailles

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999756A (en) * 1974-10-21 1976-12-28 Prince Manufacturing, Inc. Tennis racket
US4231575A (en) * 1977-12-23 1980-11-04 Mers Kutt Racket stringing
US4333650A (en) * 1980-04-03 1982-06-08 Soong Tsai C String load apportioned racket
US4437662A (en) * 1981-01-26 1984-03-20 Soong Tsai C String load apportioned racket
US5255912A (en) * 1992-03-24 1993-10-26 Kuni Tseng Arrangement of stringing holes in the yoke of a racket
USD342111S (en) * 1991-09-27 1993-12-07 Dunlop Limited Games racket stringing network
US5277422A (en) * 1991-09-27 1994-01-11 Dunlop Limited Games racket frame
US5342045A (en) * 1993-12-20 1994-08-30 Lisco, Inc. Reverse sunburst string pattern for racquetball rackets
US5562283A (en) * 1995-05-11 1996-10-08 Prince Sports Group, Inc. Sports racquet having power ring
US5649702A (en) * 1996-04-23 1997-07-22 Prince Sports Group, Inc. Sports racquet with spin-enhancing cross-section
US5779573A (en) * 1997-05-16 1998-07-14 You; Chin-San Game Racket
US6062994A (en) * 1998-04-10 2000-05-16 Ef Composite Technologies, L.P. Reinforced racquet with flat string bed

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999756A (en) * 1974-10-21 1976-12-28 Prince Manufacturing, Inc. Tennis racket
US3999756B1 (fr) * 1974-10-21 1985-12-24
US4231575A (en) * 1977-12-23 1980-11-04 Mers Kutt Racket stringing
US4333650A (en) * 1980-04-03 1982-06-08 Soong Tsai C String load apportioned racket
US4437662A (en) * 1981-01-26 1984-03-20 Soong Tsai C String load apportioned racket
USD342111S (en) * 1991-09-27 1993-12-07 Dunlop Limited Games racket stringing network
US5277422A (en) * 1991-09-27 1994-01-11 Dunlop Limited Games racket frame
US5255912A (en) * 1992-03-24 1993-10-26 Kuni Tseng Arrangement of stringing holes in the yoke of a racket
US5342045A (en) * 1993-12-20 1994-08-30 Lisco, Inc. Reverse sunburst string pattern for racquetball rackets
US5562283A (en) * 1995-05-11 1996-10-08 Prince Sports Group, Inc. Sports racquet having power ring
US5649702A (en) * 1996-04-23 1997-07-22 Prince Sports Group, Inc. Sports racquet with spin-enhancing cross-section
US5779573A (en) * 1997-05-16 1998-07-14 You; Chin-San Game Racket
US6062994A (en) * 1998-04-10 2000-05-16 Ef Composite Technologies, L.P. Reinforced racquet with flat string bed

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102133472A (zh) * 2011-03-01 2011-07-27 常延秋 柔力荡球
CN103706089A (zh) * 2014-01-09 2014-04-09 宿迁傲达康复合材料有限公司 一种羽毛球拍及其制造方法
CN106573166A (zh) * 2014-08-12 2017-04-19 百保力公司 网球拍
US20170232308A1 (en) * 2014-08-12 2017-08-17 Babolat Vs Tennis racket
JP2017523855A (ja) * 2014-08-12 2017-08-24 バボラ ヴイエス テニスラケット
EP3560559A1 (fr) * 2018-04-25 2019-10-30 Sumitomo Rubber Industries Limited Raquette de tennis avec différentes tailles de mailles
US20190329102A1 (en) * 2018-04-25 2019-10-31 Sumitomo Rubber Industries, Ltd. Tennis racket
US10814188B2 (en) * 2018-04-25 2020-10-27 Sumitomo Rubber Industries, Ltd. Tennis racket

Also Published As

Publication number Publication date
TW200819169A (en) 2008-05-01
TWI317642B (fr) 2009-12-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CHIA-YUAN CHANG, TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHANG, CHIA-YUAN;CHANG, FENG-HSIANG;REEL/FRAME:020106/0625

Effective date: 20071009

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION