US20030073523A1 - Method for manufacturing rackets with shock absorbing members with single heating process - Google Patents
Method for manufacturing rackets with shock absorbing members with single heating process Download PDFInfo
- Publication number
- US20030073523A1 US20030073523A1 US09/977,676 US97767601A US2003073523A1 US 20030073523 A1 US20030073523 A1 US 20030073523A1 US 97767601 A US97767601 A US 97767601A US 2003073523 A1 US2003073523 A1 US 2003073523A1
- Authority
- US
- United States
- Prior art keywords
- shock absorbing
- absorbing members
- shaft
- racket
- head
- 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
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Classifications
-
- 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
- A63B49/10—Frames made of non-metallic materials, other than wood
-
- 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
- A63B49/03—Frames characterised by throat sections, i.e. sections or elements between the head and the shaft
-
- 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
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
Definitions
- the present invention relates to a method for manufacturing a racket that has shock absorbing member inserted in the throat portion and/or shaft.
- the method requires only one time of heating process.
- a conventional racket such as a tennis racket generally includes a head, a throat and a shaft.
- the throat is connected between the frame and the shaft.
- Strings are connected in the head so as to hit the ball.
- the impact that the head bears when the ball hits on the head can be huge that the user's hand cannot hold the handle properly. Therefore, manufacturers try to reduce the impact and vibration on the racket.
- Most of the manufacturers put shock absorbing material on the sides of the head or on the shaft, and that cannot be satisfied because the shock absorbing material does not located at accurate positions and the thickness and weight limit the performance of the shock absorbing material.
- U.S. Pat. No. 4,284,275 to Fletcher discloses a polyurethane gripping material which is mounted to the handle of rackets. The gripping material has a thickness limitation and absorbs limited vibration.
- U.S. Pat. No. 5,695,418 to Huang discloses a shock absorbing grip that has the same problems and limitations as U.S. Pat. No.
- step 1 preparing a shaft which has two extensions extending from one of two ends thereof by composite prepreg material;
- step 2 wrapping two respective shock absorbing members on the two extensions;
- step 3 preparing a head having two tubular portions extending therefrom by composite prepreg material ; ,
- step 4 inserting the two extensions wrapped with the shock absorbing members in the two tubular portions
- step 5 heating the combination in step in a mold under pressure.
- the primary object of the present invention is to provide a method for manufacturing a racket that has shock absorbing members located between the shaft and the throat portion so as to reduce the vibration of the racket.
- FIG. 1 is a flow chart to illustrate a conventional way to manufacture a racket
- FIG. 2 is a cross sectional view to show the conventional racket is formed in molds
- FIG. 3 shows the conventional racket
- FIG. 4 is a flow chart to illustrate the steps of the method of the present invention to manufacture a racket
- FIGS. 5A and 5B are illustrative view to show the combination of the shaft and the head of the racket made by the method of the present invention
- FIG. 6 shows two shock absorbing members are wrapped around the two extensions of the throat portion and the racket is heated in a mold
- FIG. 7 shows the connection of the shock absorbing members, the extensions and the tubular portions
- FIG. 8 shows the racket made by the method of the present invention
- FIG. 9 shows the connection of the connection tube, the shock absorbing member and the shaft
- FIG. 10 shows a diagram to show the vibration difference between the conventional racket and the racket made by the method of the present invention.
- the conventional way to manufacture a racket 100 is to form a combination of the head 120 and the shaft 110 of the racket 100 in a mold “ - A-“_by heating the material of the head 120 and the shaft 110 under pre-decided pressure.
- the racket 100 is then separated from the mold “A” and is applied with a sand-grinding process, a coating process and assembling accessory process.
- the method for manufacturing a racket 10 of the present invention comprises the following steps:
- step 1 preparing a shaft 11 having two extensions 13 extending from one of two ends thereof, the shaft 11 and the extensions 13 being made by composite prepreg material;
- step 2 wrapping two respective shock absorbing members 20 on the two extensions 13 ;
- the absorbing members 20 are made of rubber or sil i cone which has a fusion temperature higher than that of the composite prepreg material and has a Shore hardness number of 30 to 80 .
- step 3 forming a head 12 and the head having two tubular portions 130 extending therefrom, the head 12 and the two tubular portions 130 being made by composite prepreg material;
- steps 4 inserting the two extensions 13 wrapped with the shock absorbing members 20 in the two tubular portions 130 ;
- step 5 heating the combination in step 4 in a mold “B” under pressure
- step 6 applying a sand-grinding process to the racket
- step 7 coating the racket
- step 8 assembling accessories to the racket.
- the head 12 and the shaft 11 are made individually so that the size and/or the weight of the two items can be made according to needs so that the manufacturers can manufacture the rackets which meet requirements of attack type players and defense type players.
- the method requires only one time of heating process.
- step 1 preparing a head 12 having a throat portion 121 and a connection section 122 extending from the throat portion 121 , the head 12 , the throat portion 121 and the connection section 122 being made by composite prepreg material;
- step 2 wrapping a shock absorbing member 20 on the connection section 122 ;
- step 3 preparing a shaft 11 having an opening defined in one of two ends thereof by composite prepreg material
- steps 4 inserting the connection section 122 wrapped with the shock absorbing member 20 in the opening of the shaft 11 and heating the connection part under pressure in a mold.
Abstract
A method for manufacturing racket with shock absorbing members includes step 1 to form a shaft having two extensions by composite prepreg material; step 2 to wrap two respective shock absorbing members on the two extensions; step 3 to form a head having two tubular portions extending therefrom by composite prepreg material, and steps 4 to insert the two extensions wrapped with the shock absorbing members in the two tubular portions and to heat the combination in a mold.
Description
- The present invention relates to a method for manufacturing a racket that has shock absorbing member inserted in the throat portion and/or shaft. The method requires only one time of heating process.
- A conventional racket such as a tennis racket generally includes a head, a throat and a shaft. The throat is connected between the frame and the shaft. Strings are connected in the head so as to hit the ball. The impact that the head bears when the ball hits on the head can be huge that the user's hand cannot hold the handle properly. Therefore, manufacturers try to reduce the impact and vibration on the racket. Most of the manufacturers put shock absorbing material on the sides of the head or on the shaft, and that cannot be satisfied because the shock absorbing material does not located at accurate positions and the thickness and weight limit the performance of the shock absorbing material. U.S. Pat. No. 4,284,275 to Fletcher discloses a polyurethane gripping material which is mounted to the handle of rackets. The gripping material has a thickness limitation and absorbs limited vibration. U.S. Pat. No. 5,695,418 to Huang discloses a shock absorbing grip that has the same problems and limitations as U.S. Pat. No. 4,284,275.
- In accordance with one aspect of the present invention, there is provided a method for manufacturing racket with shock absorbing members and the method comprises the following steps:
- step 1: preparing a shaft which has two extensions extending from one of two ends thereof by composite prepreg material;
- step 2: wrapping two respective shock absorbing members on the two extensions;
- step 3: preparing a head having two tubular portions extending therefrom by composite prepreg material;,
- step 4: inserting the two extensions wrapped with the shock absorbing members in the two tubular portions, and
- step 5: heating the combination in step in a mold under pressure.
- The primary object of the present invention is to provide a method for manufacturing a racket that has shock absorbing members located between the shaft and the throat portion so as to reduce the vibration of the racket.
- The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
- FIG. 1 is a flow chart to illustrate a conventional way to manufacture a racket;
- FIG. 2 is a cross sectional view to show the conventional racket is formed in molds;
- FIG. 3 shows the conventional racket;
- FIG. 4 is a flow chart to illustrate the steps of the method of the present invention to manufacture a racket;
- FIGS. 5A and 5B are illustrative view to show the combination of the shaft and the head of the racket made by the method of the present invention;
- FIG. 6 shows two shock absorbing members are wrapped around the two extensions of the throat portion and the racket is heated in a mold;
- FIG. 7 shows the connection of the shock absorbing members, the extensions and the tubular portions;
- FIG. 8 shows the racket made by the method of the present invention;
- FIG. 9 shows the connection of the connection tube, the shock absorbing member and the shaft, and
- FIG. 10 shows a diagram to show the vibration difference between the conventional racket and the racket made by the method of the present invention.
- Referring to FIGS.1 to 3, the conventional way to manufacture a
racket 100 is to form a combination of thehead 120 and theshaft 110 of theracket 100 in a mold “-A-“_by heating the material of thehead 120 and theshaft 110 under pre-decided pressure. Theracket 100 is then separated from the mold “A” and is applied with a sand-grinding process, a coating process and assembling accessory process. - Referring to FIGS. 4, 5A,5B, 6, 7 and 8, the method for manufacturing a
racket 10 of the present invention comprises the following steps: - step 1: preparing a
shaft 11 having twoextensions 13 extending from one of two ends thereof, theshaft 11 and theextensions 13 being made by composite prepreg material; - step 2: wrapping two respective
shock absorbing members 20 on the twoextensions 13; - The absorbing
members 20 are made of rubber or silicone which has a fusion temperature higher than that of the composite prepreg material and has a Shore hardness number of 30 to 80. - step 3: forming a
head 12 and the head having twotubular portions 130 extending therefrom, thehead 12 and the twotubular portions 130 being made by composite prepreg material; - steps 4: inserting the two
extensions 13 wrapped with theshock absorbing members 20 in the twotubular portions 130; - step 5: heating the combination in step4 in a mold “B” under pressure;
- step 6: applying a sand-grinding process to the racket;
- step 7: coating the racket; and
- step 8: assembling accessories to the racket.
- The
head 12 and theshaft 11 are made individually so that the size and/or the weight of the two items can be made according to needs so that the manufacturers can manufacture the rackets which meet requirements of attack type players and defense type players. The method requires only one time of heating process. - Referring to FIG. 9, another method for manufacturing racket with shock absorbing members of the present invention comprises the following steps:
- step 1: preparing a
head 12 having a throat portion 121 and a connection section 122 extending from the throat portion 121, thehead 12, the throat portion 121 and the connection section 122 being made by composite prepreg material; - step 2: wrapping a
shock absorbing member 20 on the connection section 122; - step 3: preparing a
shaft 11 having an opening defined in one of two ends thereof by composite prepreg material; and - steps 4: inserting the connection section122 wrapped with the
shock absorbing member 20 in the opening of theshaft 11 and heating the connection part under pressure in a mold. - The sand-grinding process, the coating process and the process of assembling accessories are also applied to the another embodiment.
- As shown in FIG. 10, taking a point “D” as shown in FIG. 7 to test the vibration of the conventional racket and the racket made by the method of the present invention, two different shock waves are illustrated and which show that the racket made by the method of the present invention dramatically reduces the vibration.
- While we have shown and described the embodiment inaccordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Claims (4)
1. A method for manufacturing racket with shock absorbing members, comprising the following steps:
step 1: preparing a shaft by composite prepreg material and the shaft having two extensions extending from one of two ends thereof;
step 2: wrapping two respective shock absorbing members on the two extensions;
step 3: preparing a head by composite prepreg material and the head having two tubular portions extending therefrom;{overscore (,)}
steps 4: inserting the two extensions wrapped with the shock absorbing members in the two tubular portions, and
step 5: heating the combination in step 4 in a mold under pressure.
2. The device as claimed in claim 1 , wherein the shock absorbing members have a Shore hardness number of 30 to 80.
3. A method for manufacturing racket with shock absorbing members, comprising the following steps:
step 1: preparing a head having a throat portion and a connection section extending from the throat portion, the head, the throat portion and the connection section made by composite prepreg material;
step 2: wrapping a shock absorbing member on the connection section;
step 3: preparing a shaft which has an opening defined in one of two ends thereof, the shaft made by composite prepreg material;{overscore (,)}
step 4: inserting the connection section wrapped with the shock absorbing member in the opening of the shaft, and
step 5: heating the combination in step 4 in a mold under pressure.
4. The device as claimed in claim 3 , wherein the shock absorbing member has a Shore hardness number of 30 to 80.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/977,676 US20030073523A1 (en) | 2001-10-16 | 2001-10-16 | Method for manufacturing rackets with shock absorbing members with single heating process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/977,676 US20030073523A1 (en) | 2001-10-16 | 2001-10-16 | Method for manufacturing rackets with shock absorbing members with single heating process |
Publications (1)
Publication Number | Publication Date |
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US20030073523A1 true US20030073523A1 (en) | 2003-04-17 |
Family
ID=25525398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/977,676 Abandoned US20030073523A1 (en) | 2001-10-16 | 2001-10-16 | Method for manufacturing rackets with shock absorbing members with single heating process |
Country Status (1)
Country | Link |
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US (1) | US20030073523A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050197218A1 (en) * | 2004-03-03 | 2005-09-08 | Johannes Mauser | Racket for ball games and production process |
CN102698415A (en) * | 2012-06-29 | 2012-10-03 | 黄展刚 | Repairing method of carbon battledore |
CN102772883A (en) * | 2011-05-11 | 2012-11-14 | 源民安企业股份有限公司 | Manufacturing method of hollow pipe and grab handle of badminton racket |
CN102794002A (en) * | 2012-09-06 | 2012-11-28 | 吴先强 | High strength-resistant repairing method of carbon badminton racket |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3915453A (en) * | 1973-11-13 | 1975-10-28 | Daishiro Nishimura | Metallic racket with reinforcing apparatus |
US4983242A (en) * | 1988-11-02 | 1991-01-08 | Roland Reed | Tennis racquet having a sandwich construction, vibration-dampening frame |
US5314180A (en) * | 1989-08-28 | 1994-05-24 | Toray Industries, Inc. | Sports instrument and impact-absorbing element to be attached to sports equipment |
US6336877B1 (en) * | 1998-10-30 | 2002-01-08 | Babolat Vs | Racket stringing guide recessed on the frame side |
-
2001
- 2001-10-16 US US09/977,676 patent/US20030073523A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3915453A (en) * | 1973-11-13 | 1975-10-28 | Daishiro Nishimura | Metallic racket with reinforcing apparatus |
US4983242A (en) * | 1988-11-02 | 1991-01-08 | Roland Reed | Tennis racquet having a sandwich construction, vibration-dampening frame |
US5314180A (en) * | 1989-08-28 | 1994-05-24 | Toray Industries, Inc. | Sports instrument and impact-absorbing element to be attached to sports equipment |
US6336877B1 (en) * | 1998-10-30 | 2002-01-08 | Babolat Vs | Racket stringing guide recessed on the frame side |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050197218A1 (en) * | 2004-03-03 | 2005-09-08 | Johannes Mauser | Racket for ball games and production process |
US7077767B2 (en) * | 2004-03-03 | 2006-07-18 | Head Technology Gmbh | Racket for ball games and production process |
CN102772883A (en) * | 2011-05-11 | 2012-11-14 | 源民安企业股份有限公司 | Manufacturing method of hollow pipe and grab handle of badminton racket |
CN102698415A (en) * | 2012-06-29 | 2012-10-03 | 黄展刚 | Repairing method of carbon battledore |
CN102794002A (en) * | 2012-09-06 | 2012-11-28 | 吴先强 | High strength-resistant repairing method of carbon badminton racket |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |