CA1239948A - Racket assembly - Google Patents
Racket assemblyInfo
- Publication number
- CA1239948A CA1239948A CA000469347A CA469347A CA1239948A CA 1239948 A CA1239948 A CA 1239948A CA 000469347 A CA000469347 A CA 000469347A CA 469347 A CA469347 A CA 469347A CA 1239948 A CA1239948 A CA 1239948A
- Authority
- CA
- Canada
- Prior art keywords
- racket
- assembly
- members
- string
- frame portion
- 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.)
- Expired
Links
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
-
- 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
- A63B49/022—String guides on frames, e.g. grommets
-
- 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
- A63B2049/0205—Frames comprising at least two similar parts assembled with the interface plane parallel to the string plane
Abstract
Abstract of the Disclosure There is disclosed a novel racket assembly for playing tennis, racket ball or the like comprised of half racket members each comprised of a frame portion and a handle portion mounted to one another along common or connecting surfaces thereof wherein at least one of the frame portions of the half racket member is of a generally U-shaped cross-section to there-by define a hollow frame of the resulting racket assembly.
Description
~9~
NOVEL RACKET ASS~MBLY
Field of the Invention This invention relates to a racket assembly, and more particularly to a stringed racket assembly for games, such as tennis, racket ball, and the like.
Background of the Invention Racket assemblies for playing tennis, racket ball and the like are generally formed of one piece and comprised of an oval-shaped frame portion and a handle portion extending from the frame portion generally along a longitudinal axis of the oval-shaped frame portion. ~acket assemblies have required more and more complicated and expensive manufacturing tech-niques. Additionally, there have existed greater demands for high quality rackets exhibiting better balance, more constant tension forces about a greater area of the stringed portion of the frame member, etc.
Objects of the Invention An object of the present invention is to provide a novel racket assembly.
Yet another object of thé present invention is to provide a novel racket assembly of improved construction.
Still another object of the present invention i9 to provide a novel racket as~embly exhibiting better balancing characteristics.
A further object of the present invention is to provide a novel racket assembly of improved constant tension forces of the stringed area.
:~3~
A still further object of the present invention is to provide a novel racket assembly which is completely strung prior to assembly of the components to form the racket assembly.
Summary of the Invention These and other objects of the present invention are achieved by a novel racket assembly comprised of half racket members each comprised of a frame portion and a handle portion mounted to one another along common or connecting surfaces thereof wherein at least one of the frame portions of the half racket member is of a generally U-shaped cross-section to thereby define a hollow frame of the resulting racket assembly.
In one embodiment, the invention provides a racket assembly, which comprises first and second half racket members, formed of a frame portion and a handle portion extending therefrom, at least one of said frame portions of said half racket members being generally U-shaped in cross-section, said half racket members being formed of a material selected from the group consisting o~ plastic and a light metal and means for connecting said half racket members along a common longitudinal a~is to thereby form said racket assembly, said racket assembly being of a hollow cross section about at least a frame portion thereof.
Brief Description of the Drawings ~ better understanding of the present invention as well as other objects and advantages thereof will become apparent upon consideration of the detailed disclosure when taken with the accompanyiny drawings, wherein:
Figure 1 is an ~levational view of the novel racket assembly of the present invention;
~, ,1 ~- 2 -~ igure 2 is an exploded side view of the novel racXe~
assembly of the present invention;
Figure 3 is a side view of the novel racket assembly of the present invention illustrating a form of string guide assembly 7 Figure 4 is a partial elevational view of a half racket member illustrating another form of string guide assembly;
Figure 5 is a cross-sectional view along the lines 5-5 of Figure 4;
- 2a -.~ ., ~23~
FIGURE 6 is a partial cross-sectional view of the novel racket assembly of the present invention having one form of an alignment and connecting assembly, FIGURE 7 is a cross-sectional view of the novel racket assembly of the present invention with another form of string guide assembly;
E'IGURE 8 is a cross-sectional view of the novel racket assembly of the present invention with another form of string guide assembly;
FIGUR~ 9 is a cross-sectional view of the novel racket assembly of the present invention with still another form of connecting assembly; and FIGURE 10 is a cross-sectional view of ~he novel racket assembly of FIGURE 6 including an intermediate welding layer.
Detailed Description of the Invention Referring now to FIGURES 1 and 2, there is illustrated a novel racket assembly, generally indicated as 1 (of a hollow cross-section 2) of a longitu,dinal axis 7, and comprised of half racket, members 3 and 4. The half racket members 3 and 4 include guide elements 6 and are each comprised of an oval-shaped frame portion and a handle portion. The guide elements, 6 permit alignment between the half raclcet members 3 and 4 along a common or essentially parallel plane 5 in a manner to ensure an assembled racket assembly 1 exhibiting little or no tension or pressure stresses between the half racket members 3 and 4. The guide elements 6 of each racket members 3 and 4 extend beyond the common plane 5 therebetween to provide a ~L~3~9'~13 statically an~ dynamically improved novel racket assembly 1.
Preferably the half racket members 3 and 4 are formed of a curve of revolution so as to be practically identical, and may be formed in the same tool to reduce manufacturing costs with guide members 6 being subsequently disposed in select ori~ices tnot shown) formed in each half racket member. At lea~t one of the half racket members in a frame portion thereof is generally U-shaped in cross-section thereby forming with the other ha]f racket member a hollow frame portion of the racket assembly 1.
The half racket members are formed of plastic or a light metal.
FIGURE 3 illustrates one form of string guide assembly wherein one half racket member 3 is formed with a plurality of U-shaped orifices 8 and the half racket member 4 is formed with U-shaped ear members 9 to cooperate and hold in proper tension string elements (not shown) coursed within the U-shaped orifices 8.
FIGURES 4 and 5 illustrate another embodiment of the novel racket assembly of the present invention wherein one half racket member, e.g. 3, is formed with interval reinforcing rib members 10 including string guide channels 12 for receiving string element 13 and held in place by racket member 4. The reinforcing rib members 10 define hollow spaces 11 therebe-tween, and in toto define a honeycomb structure resulting in a racket assembly of improved static strength. String guides 12 of the embodiment of FIGURES 4 and 5 provide for advantageous orientation of string element 13 therein. Generally, it is desirable to arrange some of the reinforcing ribs 10 of the 1~ .
~3~3~
embodiment of FIGURES 4 and 5 in the direction of tensioned string element 13 to reduce or substantially eliminate transverse stressing of the string elements 13.
FIGURE 6 illustrates a positioning pin 14 disposed in an orifice 15 for fixing the relative position of the half racket members 3 and 4 and affixed to one another by a screw 20, it being understood by one skilled in the art that a plurality of cooperating positioning pins 14 and orifices 15 are formed in the respective half-racket members to ensure integrity of the racket assembly 1. The provisions of such a plurality of posi-tioning pins 14 and cooperating orifices 15 together with the use of a plurality of affixing screws 20 provide a racket assembly 1 which can absorb shearing forces. With reference to FIGURE ~, the positioning pins 14 may be formed with respect to the orifices 15 to pressure fit the half racket members 3 and 4 into the racket assembly 1 without any provision for the use of screws 20, however, a racket assembly 1 provided with the pro-vision for assembly by use of screws 20 permit facile subse-quent disassembly of the racket assembly 1 to restring the racket assemhly 1. It will be understood by one skilled in the art that assembly of a racket assembly 1 may be by either positioning pin 14 and cooperating orifices 15 or by the use of screws 20, or by a combination thereof.
One particular important feature of the present inven-tion is the protection of the string elements 13 against mechan-ical damage, e.g. scraping against a playing surface referring now to FIGURE 7. In the embodiment a string element 13 is dis-~;23~g'~1~
posed in a string guide 12 and coursed about a recessed groove 16 to thereby protect the string element from mechanical damage.
The string elements 13 may be completely enclosed within the racket assembly 1, referring not to FIGURE 8 wherein the string guide 1~ is formed within one of the half racket members 3 or 4 and enclosed by side walls 17 thereof. Such embodiment substantially eliminates problems associated with mechanical damage to string elements 13 since the side walls 17 would come into contact with the playing surface.
FIGURE 8 illustrates a further advantage of the present invention wherein wedge members 18 (one shown) are provided for initial stringing of string elements 13 at a given lower string tension whereby assembly of the half racket members 3 and 4 into the racket assembly 1 causes additional tensioning of the string elements 13 to a final string tension value. This is preferably achieved by mounting together of the half racket members 3 and 4 as discussed with reference to FIGURE 6, i.e.
using screws 20.
FIGURE 9 illustrates another embodiment of the present invention relating to the assembly of the half racket members 3 and 4 to forln a racket assembly. In this embodiment, one of the half racket member 3 is formed with a plurality (one shown) of spring elements 19 including outwardly extending arm por-tions which cooperate with inwardly extending shouldered surface portions formed in the half racket member 4. According-ly, during assembly of the racket assembly, the half racket members 3 and 4 are pressed together to a point where the arm portions of the spring elements 19 of the half racket member 3 snap onto and cooperate with the shouldered surface portions of the half racket member 4. Such embodiment is preferred in some instances since such assembly does not require any tooling.
The embodiment of FIGURE 10 illustrates still another method of assembly of the half racket members 3 and 4 into a racket assembly 1 when the half racket members 3 and 4 are formed of a plastic material, preferably reinforced with carbon fibers. Accordingly, the half racket members 3 and 4 may be welded together using ultrasonic or electromagnetic forces in an appropriate system, or may use an intermediate layer of a plastic material 21 particularly when the plastic material of the racket members is reinforced with carbon fibers. In such assembly the plastic layer 21 becomes a part of the racket assembly 1. When using an intermediate layer of a plastic material 21, it is generally necessary to excise portions there-of to provide access for the positioning pins 14 to the orifices 15, the string guides 12, or other areas of the common plane 5 necessary for proper assembly of the half racket members 3 and 4 to forn1 a rac]cet assembly.
It will be readily appreciated by one skilled in the art that the present invention provides a racket assembly which permits the stringing of one of the half racket members prior to assembly of the racket assembly hereof, as distinguished from the stringirlg of rac3cet assemblies of the prior art requir-ing the coursing or threading of the string elements through a plurality of channels disposed about the frame memberO In accordance with the present invention, stringing of the racket ~Z3~94~3 may be automated and effected during production of the racket assembly.
While the present invention has been described in con-nection with several exemplary embodiments thereof, it will be understood that many modifications will be apparent to those of ordinary skill in the art; and that this application is intended to cover any adaptations or variations thereof. There-fore, it is manifestly intended that this invention be only limited by the claims and the e~uivalents thereof.
NOVEL RACKET ASS~MBLY
Field of the Invention This invention relates to a racket assembly, and more particularly to a stringed racket assembly for games, such as tennis, racket ball, and the like.
Background of the Invention Racket assemblies for playing tennis, racket ball and the like are generally formed of one piece and comprised of an oval-shaped frame portion and a handle portion extending from the frame portion generally along a longitudinal axis of the oval-shaped frame portion. ~acket assemblies have required more and more complicated and expensive manufacturing tech-niques. Additionally, there have existed greater demands for high quality rackets exhibiting better balance, more constant tension forces about a greater area of the stringed portion of the frame member, etc.
Objects of the Invention An object of the present invention is to provide a novel racket assembly.
Yet another object of thé present invention is to provide a novel racket assembly of improved construction.
Still another object of the present invention i9 to provide a novel racket as~embly exhibiting better balancing characteristics.
A further object of the present invention is to provide a novel racket assembly of improved constant tension forces of the stringed area.
:~3~
A still further object of the present invention is to provide a novel racket assembly which is completely strung prior to assembly of the components to form the racket assembly.
Summary of the Invention These and other objects of the present invention are achieved by a novel racket assembly comprised of half racket members each comprised of a frame portion and a handle portion mounted to one another along common or connecting surfaces thereof wherein at least one of the frame portions of the half racket member is of a generally U-shaped cross-section to thereby define a hollow frame of the resulting racket assembly.
In one embodiment, the invention provides a racket assembly, which comprises first and second half racket members, formed of a frame portion and a handle portion extending therefrom, at least one of said frame portions of said half racket members being generally U-shaped in cross-section, said half racket members being formed of a material selected from the group consisting o~ plastic and a light metal and means for connecting said half racket members along a common longitudinal a~is to thereby form said racket assembly, said racket assembly being of a hollow cross section about at least a frame portion thereof.
Brief Description of the Drawings ~ better understanding of the present invention as well as other objects and advantages thereof will become apparent upon consideration of the detailed disclosure when taken with the accompanyiny drawings, wherein:
Figure 1 is an ~levational view of the novel racket assembly of the present invention;
~, ,1 ~- 2 -~ igure 2 is an exploded side view of the novel racXe~
assembly of the present invention;
Figure 3 is a side view of the novel racket assembly of the present invention illustrating a form of string guide assembly 7 Figure 4 is a partial elevational view of a half racket member illustrating another form of string guide assembly;
Figure 5 is a cross-sectional view along the lines 5-5 of Figure 4;
- 2a -.~ ., ~23~
FIGURE 6 is a partial cross-sectional view of the novel racket assembly of the present invention having one form of an alignment and connecting assembly, FIGURE 7 is a cross-sectional view of the novel racket assembly of the present invention with another form of string guide assembly;
E'IGURE 8 is a cross-sectional view of the novel racket assembly of the present invention with another form of string guide assembly;
FIGUR~ 9 is a cross-sectional view of the novel racket assembly of the present invention with still another form of connecting assembly; and FIGURE 10 is a cross-sectional view of ~he novel racket assembly of FIGURE 6 including an intermediate welding layer.
Detailed Description of the Invention Referring now to FIGURES 1 and 2, there is illustrated a novel racket assembly, generally indicated as 1 (of a hollow cross-section 2) of a longitu,dinal axis 7, and comprised of half racket, members 3 and 4. The half racket members 3 and 4 include guide elements 6 and are each comprised of an oval-shaped frame portion and a handle portion. The guide elements, 6 permit alignment between the half raclcet members 3 and 4 along a common or essentially parallel plane 5 in a manner to ensure an assembled racket assembly 1 exhibiting little or no tension or pressure stresses between the half racket members 3 and 4. The guide elements 6 of each racket members 3 and 4 extend beyond the common plane 5 therebetween to provide a ~L~3~9'~13 statically an~ dynamically improved novel racket assembly 1.
Preferably the half racket members 3 and 4 are formed of a curve of revolution so as to be practically identical, and may be formed in the same tool to reduce manufacturing costs with guide members 6 being subsequently disposed in select ori~ices tnot shown) formed in each half racket member. At lea~t one of the half racket members in a frame portion thereof is generally U-shaped in cross-section thereby forming with the other ha]f racket member a hollow frame portion of the racket assembly 1.
The half racket members are formed of plastic or a light metal.
FIGURE 3 illustrates one form of string guide assembly wherein one half racket member 3 is formed with a plurality of U-shaped orifices 8 and the half racket member 4 is formed with U-shaped ear members 9 to cooperate and hold in proper tension string elements (not shown) coursed within the U-shaped orifices 8.
FIGURES 4 and 5 illustrate another embodiment of the novel racket assembly of the present invention wherein one half racket member, e.g. 3, is formed with interval reinforcing rib members 10 including string guide channels 12 for receiving string element 13 and held in place by racket member 4. The reinforcing rib members 10 define hollow spaces 11 therebe-tween, and in toto define a honeycomb structure resulting in a racket assembly of improved static strength. String guides 12 of the embodiment of FIGURES 4 and 5 provide for advantageous orientation of string element 13 therein. Generally, it is desirable to arrange some of the reinforcing ribs 10 of the 1~ .
~3~3~
embodiment of FIGURES 4 and 5 in the direction of tensioned string element 13 to reduce or substantially eliminate transverse stressing of the string elements 13.
FIGURE 6 illustrates a positioning pin 14 disposed in an orifice 15 for fixing the relative position of the half racket members 3 and 4 and affixed to one another by a screw 20, it being understood by one skilled in the art that a plurality of cooperating positioning pins 14 and orifices 15 are formed in the respective half-racket members to ensure integrity of the racket assembly 1. The provisions of such a plurality of posi-tioning pins 14 and cooperating orifices 15 together with the use of a plurality of affixing screws 20 provide a racket assembly 1 which can absorb shearing forces. With reference to FIGURE ~, the positioning pins 14 may be formed with respect to the orifices 15 to pressure fit the half racket members 3 and 4 into the racket assembly 1 without any provision for the use of screws 20, however, a racket assembly 1 provided with the pro-vision for assembly by use of screws 20 permit facile subse-quent disassembly of the racket assembly 1 to restring the racket assemhly 1. It will be understood by one skilled in the art that assembly of a racket assembly 1 may be by either positioning pin 14 and cooperating orifices 15 or by the use of screws 20, or by a combination thereof.
One particular important feature of the present inven-tion is the protection of the string elements 13 against mechan-ical damage, e.g. scraping against a playing surface referring now to FIGURE 7. In the embodiment a string element 13 is dis-~;23~g'~1~
posed in a string guide 12 and coursed about a recessed groove 16 to thereby protect the string element from mechanical damage.
The string elements 13 may be completely enclosed within the racket assembly 1, referring not to FIGURE 8 wherein the string guide 1~ is formed within one of the half racket members 3 or 4 and enclosed by side walls 17 thereof. Such embodiment substantially eliminates problems associated with mechanical damage to string elements 13 since the side walls 17 would come into contact with the playing surface.
FIGURE 8 illustrates a further advantage of the present invention wherein wedge members 18 (one shown) are provided for initial stringing of string elements 13 at a given lower string tension whereby assembly of the half racket members 3 and 4 into the racket assembly 1 causes additional tensioning of the string elements 13 to a final string tension value. This is preferably achieved by mounting together of the half racket members 3 and 4 as discussed with reference to FIGURE 6, i.e.
using screws 20.
FIGURE 9 illustrates another embodiment of the present invention relating to the assembly of the half racket members 3 and 4 to forln a racket assembly. In this embodiment, one of the half racket member 3 is formed with a plurality (one shown) of spring elements 19 including outwardly extending arm por-tions which cooperate with inwardly extending shouldered surface portions formed in the half racket member 4. According-ly, during assembly of the racket assembly, the half racket members 3 and 4 are pressed together to a point where the arm portions of the spring elements 19 of the half racket member 3 snap onto and cooperate with the shouldered surface portions of the half racket member 4. Such embodiment is preferred in some instances since such assembly does not require any tooling.
The embodiment of FIGURE 10 illustrates still another method of assembly of the half racket members 3 and 4 into a racket assembly 1 when the half racket members 3 and 4 are formed of a plastic material, preferably reinforced with carbon fibers. Accordingly, the half racket members 3 and 4 may be welded together using ultrasonic or electromagnetic forces in an appropriate system, or may use an intermediate layer of a plastic material 21 particularly when the plastic material of the racket members is reinforced with carbon fibers. In such assembly the plastic layer 21 becomes a part of the racket assembly 1. When using an intermediate layer of a plastic material 21, it is generally necessary to excise portions there-of to provide access for the positioning pins 14 to the orifices 15, the string guides 12, or other areas of the common plane 5 necessary for proper assembly of the half racket members 3 and 4 to forn1 a rac]cet assembly.
It will be readily appreciated by one skilled in the art that the present invention provides a racket assembly which permits the stringing of one of the half racket members prior to assembly of the racket assembly hereof, as distinguished from the stringirlg of rac3cet assemblies of the prior art requir-ing the coursing or threading of the string elements through a plurality of channels disposed about the frame memberO In accordance with the present invention, stringing of the racket ~Z3~94~3 may be automated and effected during production of the racket assembly.
While the present invention has been described in con-nection with several exemplary embodiments thereof, it will be understood that many modifications will be apparent to those of ordinary skill in the art; and that this application is intended to cover any adaptations or variations thereof. There-fore, it is manifestly intended that this invention be only limited by the claims and the e~uivalents thereof.
Claims (21)
1. A racket assembly, which comprises:
first and second half racket members, formed of a frame portion and a handle portion extending therefrom, at least one of said frame portions of said half racket members being generally U-shaped in cross-section, said half racket members being formed of a material selected from the group consisting of plastic and a light metal; and means for connecting said half racket members along a common longitudinal axis to thereby form said racket assembly, said racket assembly being of a hollow cross-section about at least a frame portion thereof.
first and second half racket members, formed of a frame portion and a handle portion extending therefrom, at least one of said frame portions of said half racket members being generally U-shaped in cross-section, said half racket members being formed of a material selected from the group consisting of plastic and a light metal; and means for connecting said half racket members along a common longitudinal axis to thereby form said racket assembly, said racket assembly being of a hollow cross-section about at least a frame portion thereof.
2. The racket assembly as defined in Claim 1 wherein said first and second racket members are formed with guide member to align said first and second racket members.
3. The racket assembly as defined in Claim 1 or 2 wherein said first and second half racket members are formed of like curves of revolution with respect to a longitudinal axis thereof.
4. The racket assembly as defined in Claim 1 or 2 wherein said frame portion of one of said half racket members are formed with a plurality of U-shaped string guide orifices and said frame portion of said other half racket member are formed with a plurality of outwardly extending ear members for positioning within said plurality of U-shaped string guide orifices.
5. The racket assembly as defined in Claim 1 wherein said U-shaped frame portion is formed with laterally-disposed rib elements and thereby define a racket assembly of a honeycomb structure.
6. The racket assembly as defined in Claim 5 wherein said rib elements are formed with a string guide slot.
7. The racket assembly as defined in Claim 6 wherein at least a portion of said rib elements extend in a direction of a ten-sioned string.
8. The racket assembly as defined Claim 1 wherein said connecting means includes positioning pins and cooperating ori-fices.
9. The racket assembly as defined in Claim 1 and further including string elements disposed in one of said half racket members prior to connecting said half racket members to form said racket assembly.
10. The racket assembly as defined in Claim 6 wherein outer surface portions of said frame portions of said half racket member define a slot to cooperate with said string guide slots.
11. The racket assembly as defined in Claim 6 wherein said string guides of said rib elements partially extend into said U-shaped frame portion and said half racket members are formed with outer side walls to enclose string elements coursed about said string guides.
12. The racket assembly as defined in Claim 9 and further including wedge members to effect tensioning of said string elements during assembly.
13. The racket assembly as defined in Claim 1 wherein said con-necting means comprises spring elements including outwardly extending arm portions formed on one of said half frame member and shouldered portions formed on said other half frame member to cooperate with said arm portions.
14. The racket assembly as defined in Claim 8 wherein said positioning pins are formed to cooperate in a pressure fit with said orifices.
15. The racket assembly as defined in Claim 1 wherein said connecting means includes threaded screws.
16. The racket assembly as defined in Claim 1 or 2 wherein said half racket members are formed of plastic and are welded together.
17. The racket assembly as defined in Claim 1 or 2 wherein said half racket members are formed of a plastic material including carbon fibers.
18. The racket assembly as defined in Claim 1 wherein said connecting means includes an intermediate layer of a plastic material for effecting welding of said half racket members.
19. The racket assembly as defined in Claim 18 wherein said intermediate layer is formed with excised portions.
20. A racket assembly, which comprises:
first and second half racket members, each of said racket members formed of a frame portion and a handle portion extending therefrom, at least one of said frame portions of said half racket members being generally U-shaped in cross-section, said U-shaped frame portion of said half racket member formed by an outer side wall portion, an inner side wall portion and a bottom wall portion connected to said side wall portions, said U-shaped frame portion being formed with rib elements extending radially across said wall portions, said rib elements extending between and connected both side wall portions thereby to define a honeycombed structure, said rib elements being formed with a longitudinally-extending string guide slot, at least a portion of said rib elements extending in a direction of tensioning of a string to be coursed through said guide slot, said half racket members being formed of a material selected from the group consisting of plastic and a light metal; and means for connecting said half racket members along a common longitudinal axis to thereby form said racket assembly of hollow cross-section about said frame portion thereof.
first and second half racket members, each of said racket members formed of a frame portion and a handle portion extending therefrom, at least one of said frame portions of said half racket members being generally U-shaped in cross-section, said U-shaped frame portion of said half racket member formed by an outer side wall portion, an inner side wall portion and a bottom wall portion connected to said side wall portions, said U-shaped frame portion being formed with rib elements extending radially across said wall portions, said rib elements extending between and connected both side wall portions thereby to define a honeycombed structure, said rib elements being formed with a longitudinally-extending string guide slot, at least a portion of said rib elements extending in a direction of tensioning of a string to be coursed through said guide slot, said half racket members being formed of a material selected from the group consisting of plastic and a light metal; and means for connecting said half racket members along a common longitudinal axis to thereby form said racket assembly of hollow cross-section about said frame portion thereof.
21. The racket assembly as defined in claim 1 or claim 20 wherein the half racket members are mirror images and are locked together along the longitudinal axis to form the racket assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833343889 DE3343889A1 (en) | 1983-12-05 | 1983-12-05 | PLASTIC OR LIGHT METAL RACKETS |
| DEP3343889.7 | 1983-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1239948A true CA1239948A (en) | 1988-08-02 |
Family
ID=6216055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000469347A Expired CA1239948A (en) | 1983-12-05 | 1984-12-05 | Racket assembly |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS60198169A (en) |
| CA (1) | CA1239948A (en) |
| DE (1) | DE3343889A1 (en) |
| FR (1) | FR2555906B1 (en) |
| GB (1) | GB2150444B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT388505B (en) * | 1986-09-23 | 1989-07-25 | Head Sportgeraete Gmbh | BALL RACKETS AND METHOD FOR THE PRODUCTION THEREOF |
| US5037097A (en) * | 1988-08-18 | 1991-08-06 | Athletic Alternatives, Inc. | Sports racket |
| US5232220A (en) * | 1989-10-04 | 1993-08-03 | Gunter Adam | Ball game racket, especially for tennis or squash racket |
| US5131653A (en) * | 1991-08-19 | 1992-07-21 | Yu Chien Ping | Racket for play and sports |
| US5913740A (en) * | 1997-07-25 | 1999-06-22 | Miklos; Edward J. | Flat beam aerodynamic tennis racquet |
| US6071203A (en) * | 1998-08-13 | 2000-06-06 | Prince Sports Group, Inc. | Two piece sports racquet |
| US6800239B2 (en) | 2002-02-26 | 2004-10-05 | Prince Sports, Inc. | Method of manufacturing a two piece sports racquet |
| US9399155B2 (en) * | 2012-11-27 | 2016-07-26 | Wilson Sporting Goods Co. | Optimized thermoplastic racquet |
| EP2735346B1 (en) * | 2012-11-27 | 2016-04-06 | Wilson Sporting Goods Co. | Optimised thermoplastic racquet |
| US9199135B2 (en) * | 2012-11-27 | 2015-12-01 | Wilson Sporting Goods Co. | Optimized thermoplastic racquet |
| US20140148277A1 (en) * | 2012-11-27 | 2014-05-29 | Wilson Sporting Goods Co. | Optimized thermoplastic racquet |
| US9192822B2 (en) | 2012-11-27 | 2015-11-24 | Wilson Sporting Goods Co. | Optimized thermoplastic racquet |
| CN112023421A (en) * | 2020-08-07 | 2020-12-04 | 杭州电子科技大学 | Novel children's toy bat |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1043897B (en) * | 1955-12-05 | 1958-11-13 | Press Chemie G M B H | Ball bats, in particular badminton bats made of plastic |
| DE1089675B (en) * | 1956-10-18 | 1960-09-22 | Barbara Junghans Geb Trost | Plastic ball bats, in particular badminton bats |
| FR2195164A5 (en) * | 1972-08-02 | 1974-03-01 | Santini Ormiere Jean | |
| FR2217035B3 (en) * | 1973-02-13 | 1976-02-20 | Vergne Andree Fr | |
| FR2270908A1 (en) * | 1973-12-19 | 1975-12-12 | Martel Rene | Moulded resin tennis racket frame - has hollow interfitting string-receiving bosses in two U-section head elements |
| FR2276845A1 (en) * | 1974-07-05 | 1976-01-30 | Martel Rene | Frame for tennis racquet - has stringing holes parallel to but alternately spaced from plane of strings |
| CH596850A5 (en) * | 1974-09-09 | 1978-03-31 | Malmstroem Sven Erik | |
| CH614380A5 (en) * | 1976-07-28 | 1979-11-30 | Rossignol Sa | |
| GB1545097A (en) * | 1976-12-17 | 1979-05-02 | Pepsico Inc | Tennis rackets |
| JPS5412930A (en) * | 1977-06-30 | 1979-01-31 | Hitachi Chem Co Ltd | Racket frame |
| US4175745A (en) * | 1977-07-08 | 1979-11-27 | Fn International Societe Anonyme | Racket |
| JPS57500721A (en) * | 1980-06-02 | 1982-04-30 |
-
1983
- 1983-12-05 DE DE19833343889 patent/DE3343889A1/en not_active Withdrawn
-
1984
- 1984-12-03 GB GB08430449A patent/GB2150444B/en not_active Expired
- 1984-12-04 FR FR8418676A patent/FR2555906B1/en not_active Expired
- 1984-12-05 JP JP59258397A patent/JPS60198169A/en active Pending
- 1984-12-05 CA CA000469347A patent/CA1239948A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60198169A (en) | 1985-10-07 |
| FR2555906B1 (en) | 1988-03-11 |
| GB8430449D0 (en) | 1985-01-09 |
| DE3343889A1 (en) | 1985-06-13 |
| GB2150444B (en) | 1987-08-05 |
| FR2555906A1 (en) | 1985-06-07 |
| GB2150444A (en) | 1985-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |