GB2273245A - Games racket. - Google Patents
Games racket. Download PDFInfo
- Publication number
- GB2273245A GB2273245A GB9323841A GB9323841A GB2273245A GB 2273245 A GB2273245 A GB 2273245A GB 9323841 A GB9323841 A GB 9323841A GB 9323841 A GB9323841 A GB 9323841A GB 2273245 A GB2273245 A GB 2273245A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- handle
- racket according
- games racket
- plane
- 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.)
- Withdrawn
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
- 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
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/0081—Substantially flexible shafts; Hinged shafts
-
- 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
- A63B60/06—Handles
- A63B60/22—Adjustable handles
-
- 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
- A63B60/06—Handles
- A63B60/22—Adjustable handles
- A63B60/28—Adjustable handles with adjustable length
-
- 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
- A63B60/06—Handles
-
- 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
- A63B60/06—Handles
- A63B60/08—Handles characterised by the material
-
- 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
- A63B60/06—Handles
- A63B60/10—Handles with means for indicating correct holding positions
-
- 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
- A63B60/50—Details or accessories of golf clubs, bats, rackets or the like with through-holes
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Golf Clubs (AREA)
Abstract
A badminton racket with improved playing qualities is provided by including a modified joint where the shaft enters the handle. The flexibility of the shaft in a direction in a plane through its axis perpendicular to the plane of the strings is increased but is substantially unaffected in a direction in a plane through its axis parallel to the plane of the strings. This is achieved by anchoring the shaft through an elastic joint which is flexible in the direction perpendicular to the plane of the strings at 14a but substantially rigid in the direction parallel to the plane of the strings at 14b, whereby the shaft can pivot about the point 15 where it enters the handle. <IMAGE>
Description
GAMES RACKET
This disclosure relates to games rackets, particularly those incorporating a single shaft such as a badminton racket. Such a racket consists essentially of a head containing the strings attached to a handle by means of a single shaft. The overall stiffness of the shaft and the distribution of that stiffness along the length of the shaft affects the playing properties of the racket. This is because the bending and recovery of the shaft immediately prior to and during the action of striking the shuttlecock can influence the head speed of the racket as it strikes the shuttlecock, so that this can add to the overall speed of the racket head so leading to increased speed applied to the shuttlecock. Also, improved "feel" can be provided to the player by this means which is desirable for the efficient striking of the shuttlecock and satisfaction to the player.
Increasing the flexibility of the shaft (measured in terms of the increased deflection of the tip of the racket when loaded at this point with the handle rigidly clamped) generally is desirable, but this often leads to shafts of poor durability. Also, this can be disadvantageous in that whilst increased flexibility in a plane through the axis of the shaft perpendicular to the plane of the strings is desirable, it is undesirable for flexibility to be increased in a plane through the axis of the shaft parallel to the plane of the strings, because this can lead to less chance of contact with the shuttlecock being made in the centre of the racket head.
According to the present invention a games racket comprises a head defining interlaced strings, a shaft and a handle, the shaft connected at a first end to the head and at a second opposite end to the handle, the handle having a central longitudinal axis wherein the shaft is attached within the handle substantially along said central axis by an anchorage means which substantially rigidly anchors the shaft in a direction in the plane of the interlaced strings whilst permitting under playing conditions elasticity to anchorage of the shaft in a perpendicular direction to the plane of interlaced strings so that the shaft is capable of pivoting in said perpendicular direction about the point where it enters said handle.
The invention relates to a method for attaching a shaft to a handle of a racket whereby its flexibility is apparently increased in a direction in a plane through its axis perpendicular to the plane of the strings, whilst not increasing its flexibility in a plane through its axis parallel to the plane of the strings. This is achieved by a special way in which the shaft of the racket is anchored in the handle in which the anchorage allows a degree of elastic movement in one plane, but not in another. The elastic movement allows the shaft of the racket to rotate about a pivot where the shaft enters the handle so that this rotational movement is additive to flexure of the shaft under load.In other words, the deflection of the tip of the racket incorporating this anchorage system is the sum of the deflection, due to the bending of the shaft, and that due to rotation of the shaft about its pivot point as allowed by the elasticity of the anchorage system. The anchorage system, however, is substantially rigid in the perpendicular plane, so that the deflection of the tip of the racket is solely due to flexure of the shaft in this direction. See
Figures 1 to 4, in which:
Figure 1 is a schematic side view, i.e. in the
plane of the strings, of a racket 10
in which a head portion 11 is attached
to a shaft 12 which is attached to a
handle 13 by means of an anchorage means
14a, positioned towards the butt end
of the handle and an elastomeric grommet
15 at the point where the shaft enters
the handle.The anchorage means
comprises a spring 14a which can move
elastically in direction AA';
Figure 2 is a schematic front view of the same
racket shown in Figure 1 and illustrates
the anchorage means 146 which cannot
move in direction BB';
Figure 3 illustrates schematically what happens
when the racket head portion 11 is
subjected to a load "L" as shown in
Figure 1 such as from striking a
shuttlecock. The spring 14a allows
the shaft to move a distance "w" and
the elastomeric grommet 15 allows the
shaft to pivot thus giving a total
deflection "w+d";
Figure 4 illustrates schematically what happens
when the racket head portion 11 is
subjected to a load gL" applied parallel
to the plane of the head as shown in
Figure 2.The substantially rigid
anchorage in this plane prevents the
end of the shaft from moving and the
total deflection of the head portion
is limited to "d", the result of pivotal
movement about the grommet 15;
Figure 5 is a sectional schematic view, which
would be in a plane perpendicular to
the plane of the strings, of part of
a games racket in which the shaft 16
is bonded into an anchorage means 17
consisting of a spring element 17 made
of an elastomeric composition. The
spring element 17 is provided with
spigots 18, pairs of which engage into
one of several pairs of holes 19
provided in the handle 20. The spring
element 17 is designed so that in the
direction A-A' it is elastic but in
the direction B-B' it is substantially
rigid; and
Figure 6 is a sectional view through the handle
20 of Figure 5 with the spring element
anchorage means shown as an end view.
Figures 5 and 6 also show how longitudinal location of the shaft 16 is arranged by spigots 18 in the spring element 17 locating with pairs of holes 19 in the hollow handle 20. The position of the anchorage of the spring element can be adjusted longitudinally by moving the spigots into different pairs of holes and this can be arranged by increasing or decreasing the length of the shaft to provide an overall acceptable racket length. It will be appreciated that the apparent flexibility of the shaft in the plane through the shaft perpendicular to the strings can be significantly modified by this means.
It will be appreciated that the qualities of pivot point 21 are also an important factor. This may be made from the same material as that of the handle, or it may be formed of separate material which may itself have elastic properties. Preferably the pivotal point is flexible to prevent rattling during use of the racket, e.g. it may be of an elastomeric material in the form of a grommet.
The spring element may be of various configurations provided that the requirements of rigid location of the shaft in rotational sense and a longitudinal sense are achieved and lateral flexibility.
is only allowed in the desired plane. The material from which the spring element is made may be metal, rubber or plastic or a combination of these, or of other suitable material, the difference in rigidity properties (hardness and resilience) being due to the compositions/conformations of the materials from which the elements are formed.
Claims (13)
1. A games racket comprises a head defining interlaced strings, a shaft and a handle, the shaft connected at a first end to the head and at a second opposite end to the handle, the handle having a central longitudinal axis wherein the shaft is attached within the handle substantially along said central axis by an anchorage means which substantially rigidly anchors the shaft in a direction in the plane of the interlaced strings whilst permitting under playing conditions elasticity to anchorage of the shaft in a perpendicular direction to the plane of interlaced strings so that the shaft is capable of pivoting in said perpendicular direction about the point where it enters said handle.
2. A games racket according to Claim 1 wherein the anchorage means comprises a spring element.
3. A games racket according to Claim 1 or 2 wherein the spring element comprises an elastomeric, plastic or metallic material.
4. A games racket according to any previous claim wherein the shaft is bonded to the anchorage means.
5. A games racket according to any previous claim wherein it is the configuration of the anchorage means which rigidly anchors the shaft in one direction and permits elasticity in another.
6. A games racket according to any previous claim wherein the anchorage means substantially prevents rotational movement of the shaft in relation to the handle.
7. A games racket according to any previous claim wherein the anchorage means is positioned adjacent the end of the handle distant from the head portion.
8. A games racket according to any previous claim wherein at the point wherein the shaft enters the handle the shaft is held elastically in position by an elastomeric, plastic or metallic component.
9. A games racket according to any preceding claim wherein at the point where the shaft enters the handle the shaft is held elastically in position by a grommet.
10. A games racket according to any preceding claim wherein the position of the anchorage means is adjustable along the central axis of the handle.
11. A games racket according to Claim 10 wherein the means to allow adjustment comprises complementary formations in the anchorage means and handle.
12. A games racket according to any previous claim and substantially as described with reference to any one of Figures 1 to 6.
13. A games racket according to any one of Claims 1 to 11 and substantially as described herein.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9323841A GB2273245A (en) | 1992-12-08 | 1993-11-19 | Games racket. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929225731A GB9225731D0 (en) | 1992-12-08 | 1992-12-08 | Games racket frame |
GB9323841A GB2273245A (en) | 1992-12-08 | 1993-11-19 | Games racket. |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9323841D0 GB9323841D0 (en) | 1994-01-05 |
GB2273245A true GB2273245A (en) | 1994-06-15 |
Family
ID=26302129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9323841A Withdrawn GB2273245A (en) | 1992-12-08 | 1993-11-19 | Games racket. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2273245A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6254501B1 (en) * | 2000-02-08 | 2001-07-03 | Kuo-Yi Chang | Metal racket |
EP1116503A1 (en) | 2000-01-14 | 2001-07-18 | Babolat Vs | Badminton racket |
US6471607B2 (en) * | 2000-12-28 | 2002-10-29 | Hsu Young-Chen | Shock absorbing handle for a sport racket |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131652A (en) * | 1991-01-25 | 1992-07-21 | Peng Jung Ching | Shock absorbing racket handle |
-
1993
- 1993-11-19 GB GB9323841A patent/GB2273245A/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5131652A (en) * | 1991-01-25 | 1992-07-21 | Peng Jung Ching | Shock absorbing racket handle |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1116503A1 (en) | 2000-01-14 | 2001-07-18 | Babolat Vs | Badminton racket |
FR2803765A1 (en) | 2000-01-14 | 2001-07-20 | Babolat Vs | BADMINTON RACKET |
US6254501B1 (en) * | 2000-02-08 | 2001-07-03 | Kuo-Yi Chang | Metal racket |
US6471607B2 (en) * | 2000-12-28 | 2002-10-29 | Hsu Young-Chen | Shock absorbing handle for a sport racket |
Also Published As
Publication number | Publication date |
---|---|
GB9323841D0 (en) | 1994-01-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5332214A (en) | Golf putter | |
JP3760386B2 (en) | Billiard cue | |
KR860007939A (en) | Golf clubs | |
US6461259B1 (en) | Table tennis bat with adjusting gravity mechanism | |
US4765620A (en) | Racket vibration dampener combined with grommet strip | |
JP4187492B2 (en) | 2-piece grommet assembly for sports rackets | |
US6322458B1 (en) | Golf club shaft | |
US5573468A (en) | Golf putter | |
EP1759736B1 (en) | Reinforcing member for a badminton racquet | |
US5350173A (en) | Sports racket | |
GB2273245A (en) | Games racket. | |
US5143373A (en) | Tennis racket | |
CA2110220A1 (en) | Games racket | |
US5219165A (en) | Tennis racquet | |
US20140335979A1 (en) | Racquet having elongated grommet barrels with improved damping characteristics | |
US5620377A (en) | Golf club including removably attached ground engageable guide surface | |
GB2152388A (en) | Golf club | |
JPS63255077A (en) | Improved golf club putter shaft | |
US20020091013A1 (en) | Shaft enveloping counterweight apparatus and method | |
JPH07163679A (en) | Tennis racket | |
CA1306476C (en) | Racket with improved throat portion | |
GB2035099A (en) | Badminton racquet handles | |
JP3277460B2 (en) | Golf practice equipment | |
RU2203713C2 (en) | Tennis racket with increased hitting effectiveness | |
JP2002035188A (en) | Wooden part of table tennis racket |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |