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WO2007113535A1 - Embout de queue de billard - Google Patents

Embout de queue de billard Download PDF

Info

Publication number
WO2007113535A1
WO2007113535A1 PCT/GB2007/001201 GB2007001201W WO2007113535A1 WO 2007113535 A1 WO2007113535 A1 WO 2007113535A1 GB 2007001201 W GB2007001201 W GB 2007001201W WO 2007113535 A1 WO2007113535 A1 WO 2007113535A1
Authority
WO
WIPO (PCT)
Prior art keywords
cue
cue tip
ball
tip according
tip
Prior art date
Application number
PCT/GB2007/001201
Other languages
English (en)
Inventor
Malcolm Arthur Jones
Alan Charles James
Original Assignee
Malcolm Arthur Jones
Alan Charles James
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
Priority claimed from GB0606608A external-priority patent/GB0606608D0/en
Application filed by Malcolm Arthur Jones, Alan Charles James filed Critical Malcolm Arthur Jones
Publication of WO2007113535A1 publication Critical patent/WO2007113535A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63D—BOWLING GAMES, e.g. SKITTLES, BOCCE OR BOWLS; INSTALLATIONS THEREFOR; BAGATELLE OR SIMILAR GAMES; BILLIARDS
    • A63D15/00—Billiards, e.g. carom billiards or pocket billiards; Billiard tables
    • A63D15/08—Cues
    • A63D15/12—Tip fastenings

Definitions

  • This invention relates to a cue tip for a cue used to play games such as snooker, pool or billiards or the like.
  • a detachable cue tip that is of assistance for performing masse shots.
  • Cue tips are conventionally made of a leather material that is attached to the tip of a cue by a ferrule.
  • the cue tip is usually covered in chalk by rubbing the tip into a chalk block.
  • the chalk covered cue tip allows for a reliable transfer of momentum from the cue to the cue ball.
  • the chalk is of particular use when the cue ball is struck off-centre to impart spin, for example.
  • the chalk improves the contact between the tip and the cue ball so that the cue tip does not glance off the cue ball when struck. Thus, momentum and spin can be reliably transferred to the cue ball.
  • Spin is used to alter the behaviour, such as the speed and direction, of the cue ball as it travels along the table or once it strikes another ball or the cushions/rails.
  • Spin can be used to make the cue ball follow a curved path, which is known as a swerve shot.
  • An extreme form of swerve shot is known as a masse shot wherein the direction of travel of the cue ball is radically changed shortly after being struck due to the spinning ball gripping the cloth of the table.
  • a masse shot is performed by elevating the cue butt high above the cue ball so that the cue is vertical, or almost vertical, and the cue tip is directly over the cue ball. The cue is then brought rapidly downwards to strike the cue ball so as to impart significant spin.
  • the shot is played as if forcing the cue, and thus the cue ball, downwards through the table.
  • the cue tip may strike the cloth of the table, which may cause damage to the cue, cue tip, cloth and/or the table itself.
  • the cue ball governs how it will spin; if the ball is struck off-centre towards the back, the ball will get backspin and will momentarily move forwards and then, as the spinning ball grips the cloth, it will shoot backwards.
  • the spin imparted urges it to travel in a different direction.
  • a masse shot is rarely played, as it is particularly difficult to consistently judge the power required and where the cue ball should be struck so that the cue ball follows the desired path. In particular, it is difficult to gauge how effectively the cue tip will engage with the cue ball to impart the desired translational and rotational motion. Further, due to the elevated cue position and conviction with which the shot needs to be played, miscueing is common for the inexperienced player, which is likely to result in a penalty or foul shot.
  • a cue tip for attachment to the end of a cue, the cue tip having a striking surface wherein; at least part of the striking surface is convexly curved; the cue tip is of a resilient material; the cue tip has a diameter related to the diameter of a ball it is adapted to strike; the curvature, the resilience and the co-efficient of friction of the striking surface being chosen such that the desired amount of spin and momentum is reliably imparted to a ball.
  • the whole striking surface is convexly curved.
  • the whole of the striking surface is hemispherical.
  • the radius of curvature of the striking surface is substantially between 6mm to 10mm.
  • the diameter of the cue tip may be at least 20% of the diameter of the ball it is adapted to strike and preferably at least 24% or 25%.
  • the tip may be of a synthetic elastic material, preferably polyurethane or a synthetic rubber. Alternatively the tip may be of natural rubber.
  • the striking surface of the cue tip may be textured.
  • the texture is a dimpled texture.
  • the tip may have a ridged texture.
  • the ridged texture may comprise concentric circular ridges originating from the apex of the convexly curved surface.
  • the texture may comprise suckers or hairs.
  • the striking surface may, however, be smooth.
  • the cue tip is detachable.
  • the cue tip is attached to a body part that includes a connecting portion for detachably connecting the cue tip to a cue.
  • the body part may be weighted.
  • the body part and cue tip weigh between 2 and 20 grams, but preferably between 3-6 grams.
  • the connecting portion comprises gripping legs to surround the end of a cue.
  • the body part is adapted to receive a securing collar to urge the legs into gripping contact with the cue.
  • a detachable cue tip having a cue tip of the form of the first aspect of the invention and a connecting portion for connecting the detachable cue tip to the end of a cue.
  • the detachable cue tip weighs between 2 and 20 grams, but preferably between 3-6 grams.
  • Figure 1 shows an isometric view of an embodiment of the invention
  • Figure 2 shows a side view of the embodiment of Figure 1 striking a ball
  • Figure 3 shows a detachable cue tip striking a ball
  • Figure 4 shows an exploded and cut-away view of an embodiment of the invention.
  • Figure 5 shows an assembled and cut-away view of the embodiment of Figure 3.
  • a detachable cue tip 1 is shown in Figures 1 and 2 comprising a head portion 2 and a body part 3.
  • the body part 3 is cylindrical and has a connecting portion 4 that comprises three circumferentially spaced gripping legs 5.
  • the gripping legs 5 depend from the body part 3 and are of the form of a cylindrical hollow tube having longitudinal cut-outs that form gaps 6 between the legs 5.
  • the legs 5 are flexible and of a material such as polyurethane or nylon.
  • the legs 5 define a blind bore 7 between them in which the end of a cue is received.
  • the detachable cue tip 1 is adapted to be connected to the end of a snooker, pool or billiards cue.
  • the diameter of the blind bore 7 will be sized to receive the cue.
  • snooker cues usually have an end of relatively small diameter compared with an American pool cue and thus the bore 7 of the detachable cue tip 1 will be sized accordingly.
  • the body part 3 is adapted to receive a securing collar 8 that is slidably mounted on the body part 3 such that it is able to slide longitudinally along the body part including the legs 5. Accordingly, the body part 3 includes a step 10 that separates a larger diameter portion 11 from a smaller diameter portion 12 from which the legs 5 extend. Further, the outwardly facing surface 13 of the distal end 14 of the legs 4 includes an outwardly projecting flange 16. The step 10 and flange 16 limit the movement of the securing collar 8.
  • the head portion 2 is substantially hemispherical and is attached to the body portion 3 by its base.
  • the head portion 2 has a convexly curved striking surface 17 that, in use, is adapted to strike a pool, snooker or billiard ball or the like.
  • the head portion 2 is a solid part, although it will be appreciated that the head portion may comprise a core part having a hemispherical shell moulded thereon to form the striking surface 17.
  • the diameter of the base of the head portion 2 is equal to that of the body part 3, such that the circular edge of the base of the head portion 2 is flush with the body part 3. This ensures that the resilient head portion 2 is supported by the body part 3.
  • the diameter of the head portion 2 is important to ensure it successfully and consistently transfers momentum and spin as it strikes the cue ball thereby reducing the chance of a miscue.
  • the most effective diameter for the head portion 2 depends on the diameter of the balls it is adapted to strike.
  • the balls range in diameter depending on whether they are for snooker, pool or billiards and on the size of the table. However, typically they range from 45mm to 58mm in diameter. It has been found that a head portion having a diameter at least 25% of the diameter of the ball is particularly effective. However, successful and consistent cue ball striking has been achieved with head portion diameters of 28%, 30%, 32%, 34% and 36% of the diameter of the ball to be struck.
  • the material of which the head portion 2 is made and, in particular, the resilience of the material is also important for consistently performing masse shots. If the head portion 2 is of a relatively hard material that is not particularly resilient, then when the hemispherical cue tip strikes the ball, only a small area will contact the ball. This results in a good transfer of momentum as the tip will not absorb much energy but it will be more difficult to impart spin. Conversely, if the tip is relatively deformable then it will deform when it strikes the ball thus engaging a larger area and making it easier to impart spin. However, a deformable cue tip will absorb energy and reduce the power of the shot.
  • Figure 3 shows the detachable cue tip 1 striking a ball 18 in a downward direction as if performing a masse shot.
  • the hemispherical head portion 2 has deformed over region 20. This deformation increases the surface area over which the head portion 2 contacts the ball 18 thereby increasing the friction between them. This helps to convert the linear movement of the cue (shown by arrow 23) to rotational spin on the ball (shown by arrow 24) .
  • the head portion 2 and, in particular, the striking surface 17 has a shore hardness of between 40 and 100 A durometers and in particular between 60 and 80 A durometers. In the present embodiment it has a hardness of 72 A durometers. It has been found that a softer material is preferable when the cue tip is adapted to strike a larger sized ball and that a harder material is preferable when the cue tip is adapted to strike a smaller sized ball.
  • the striking surface 17 is also textured to enhance the friction between the cue tip 2 and the ball 18.
  • the texture may comprise a plurality of small (i.e. less than 0.5mm and preferably approximately 0.1mm) ridges arranged concentrically around the apex of the hemispherical head portion 2. It will be appreciated that any surface texture, such as dimples, projections, suckers or hairs, which increases the friction between the striking surface 17 and the ball 18 may be used.
  • the texture or material used for the striking surface must not be abrasive such that it could cause damage to the cue ball or table. Further, any texture that is applied must not separate from the head portion 2.
  • the friction between the striking surface 17 and the ball 18 is important if spin is to be successfully transferred to the ball.
  • the frictional characteristics of the material and surface texture should be chosen so that the striking surface gains sufficient purchase on the ball.
  • the coefficient of friction is between 1.0 and 2.0.
  • the shape of the head portion 2 must be such that it presents a striking surface 17 to the ball 18 even when the ball is struck off-centre.
  • This is represented in Figure 3, in which the centre of the ball relative to the cue is represented by dashed line 21 and, as can be seen from dashed line 22, the cue strikes off-centre (below centre) .
  • the hemispherical head portion 2 presents region 20, although it will be appreciated that other shaped head portions 2 could be effective at presenting a sufficiently large contact area to impart spin.
  • the form of the apex is not of primary importance.
  • the head portion 2 could be substantially conical having a wall that curves convexly from the junction with the base to the apex.
  • the head portion 2 needs to at least have a striking surface that, when attached to a cue, is inclined to the longitudinal axis of the cue between 30° and 60° .
  • the use of a convexly curving head portion 2 allows a range of inclinations to be presented for effective striking of the ball 18 at various off-centre locations.
  • the use of a hemispherical head portion 2 allows, of course, a range of inclined striking surfaces to be presented from 0° at the apex to almost 90° at the junction between the striking surface 17 and the body part 3.
  • the weight of the detachable cue tip 1 affects how much momentum is transferred from the cue to the ball.
  • the weight of the cue tip 1 is between 3 and 6 grams, although it may be between 2 and 20 grams, in particular 4, 5, 8, 10, 12, 14, 16 or 18 grams.
  • the detachable cue tip 1 is attached to a cue by inserting the end of a cue into the blind bore 7 defined by legs 5 with the securing collar 8 abutting step 10. Once the cue is inserted in the bore 7, the securing collar is slid towards the distal end 14 of the legs 5.
  • the diameter of the bore 7 is substantially constant along its length (as shown in Figure 2) .
  • the outwardly facing surface 13 of the legs 5 increases in diameter from proximal end adjacent the head portion 2 to the distal end 14.
  • the diameter of the cue will determine how far the securing collar 8 needs to slide before the detachable cue tip 1 is securely attached, although it will be prevented from sliding off the distal end 14 by flange 16.
  • the construction of the detachable cue tip 1 is shown in Figures 4 and 5.
  • the body part 3 includes a metal washer 25 having a plurality of holes 26 therein.
  • the metal washer 25 may provide weight in the detachable cue tip 1. The weight could alternatively be separate from the washer 25 and be mounted in the body part 3.
  • the body part 3 including the connecting portion 4 is moulded around the washer 25 wherein spigots in the mould ensure that the holes 26 remain free of moulding material.
  • the washer 25 is located in aperture 27.
  • the body part 3 is typically moulded of polycarbonate and polyurethane.
  • the head portion 2 is moulded onto the body part 3 such that moulding material extended through the holes 26 and forms a layer on an underside 28 of a ledge 30. This ensures that the head portion 2 is securely fixed to the body part 3. This is important to ensure an effective transfer of energy from the cue to the ball. Further, by moulding the head portion 2 through the body part 3, the total volume of the head portion is increased, which improves the resilience of the head portion 2 thereby improving the "feel" of the contact between the cue tip and the ball.

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  • Toys (AREA)

Abstract

L'invention concerne un embout (1) de queue de billard destiné à être fixé à l'extrémité d'une queue de billard, l'embout (1) de queue de billard présentant une surface de frappe (17) dont une partie au moins possède une courbure convexe. L'embout (1) de queue de billard est constitué d'une matière élastique et possède un diamètre adapté au diamètre d'une boule (18) qu'il est appelé à frapper. La courbure, l'élasticité et le coefficient de frottement de la surface de frappe (17) sont choisis de façon à communiquer de façon sûre à la boule (18) une rotation sur elle-même et une impulsion souhaitées. L'invention concerne également un embout détachable (1) de queue de billard.
PCT/GB2007/001201 2006-04-01 2007-04-02 Embout de queue de billard WO2007113535A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0606608A GB0606608D0 (en) 2006-04-01 2006-04-01 Cue tip
GB0606608.8 2006-04-01
US78927506P 2006-04-04 2006-04-04
US60/789,275 2006-04-04

Publications (1)

Publication Number Publication Date
WO2007113535A1 true WO2007113535A1 (fr) 2007-10-11

Family

ID=38180637

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/001201 WO2007113535A1 (fr) 2006-04-01 2007-04-02 Embout de queue de billard

Country Status (1)

Country Link
WO (1) WO2007113535A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190927079A (en) * 1909-11-22 1910-09-08 Charles Fischer A Device for Attaching Leather Tips to Billiard Cues.
GB220750A (en) * 1923-06-13 1924-08-28 George Arnott An improvements in or relating to cues for use in playing billiards and like games
US2072484A (en) * 1935-12-27 1937-03-02 Barney R Nyhagen Billiard cue
US5016877A (en) * 1990-01-16 1991-05-21 Lowery Jimmie L Billiard cue tip
US5938536A (en) * 1997-06-03 1999-08-17 Minke; Ronald C. Integral low maintenance cue tip

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190927079A (en) * 1909-11-22 1910-09-08 Charles Fischer A Device for Attaching Leather Tips to Billiard Cues.
GB220750A (en) * 1923-06-13 1924-08-28 George Arnott An improvements in or relating to cues for use in playing billiards and like games
US2072484A (en) * 1935-12-27 1937-03-02 Barney R Nyhagen Billiard cue
US5016877A (en) * 1990-01-16 1991-05-21 Lowery Jimmie L Billiard cue tip
US5938536A (en) * 1997-06-03 1999-08-17 Minke; Ronald C. Integral low maintenance cue tip

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