| Combination construction for a tip and point ferrule of a billiard cue -> Monitor Keywords |
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Combination construction for a tip and point ferrule of a billiard cueRelated Patent Categories: Games Using Tangible Projectile, Billiards Or Pool, Cue, Tip Or Tip Fastener Therefor, Striking Portion Formed Of Material Other Than LeatherCombination construction for a tip and point ferrule of a billiard cue description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070066412, Combination construction for a tip and point ferrule of a billiard cue. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates to a combination construction for a tip and point ferrule of a billiard cue, more particularly to a billiard cue having an assembly for a tip and point ferrule manufactured from epoxy resin reinforced glass fiber material in such a way as to be easily glued to the shaft without coming off. [0003] 2. Prior Art [0004] A conventional billiard cue such as a break cue and a jump cue are specified to be 1.4 meters in length and 600 grams in weight. The cue's construction can be divided into tip-point ferrule-shaft-joint-butt hilt-cushion in order from the tip side. In this invention, a tip and point ferrule in combination are described as a combination construction for a tip and point ferrule of a billiard cue. The tip of this combination construction is usually made of buffalo leather, rubber, or phenolic resin, and if used as the tip of a breaking cue, it is found that the strength of the tip is not sufficient to resist deformation. Meanwhile, a tip made of buffalo leather and rubber has a high water absorbance, and will cause insufficient chalk adherence onto the cue tip when applying chalk, thus transferring insufficient momentum and losing precision when hitting the billiard ball. [0005] The conventional billiard cue is comprised of a shaft, a butt hilt and a joint for combining the shaft and the butt hilt, wherein the joint can be formed by a screw like protrusion located at the front end of the butt hilt and screwed into a nut located at the rear end of the shaft to combine into the billiard cue, while the tip (tip pad and tip insert) and point ferrule are fixed (screwed or glued) at the front end of the shaft, and a compression packing is located between the tip and point ferrule and is used to absorb the counter force of striking the billiard ball so that the tip and point ferrule are not damaged during breaking or hitting. The outer most part of the shaft is shaped into a small cylindrical shaped object to be inserted into the cavity of a bush shaped point ferrule in order to connect the small cylindrical object beneath the tip. There are some troublesthat occur, such as separation, breakage, and crack formation in the tip, point ferrule and compression packing due to inadequate materials (high moisture content, low strength) and fixation methods. Similar known billiard cues having improved tip configurations are disclosed in U.S. Pat. No. 5,462,490. [0006] There has been a long felt need by persons skilled in the art of billiard manufacturing for adopting an appropriate material to make a billiard cue having sufficient strength not to deform when breaking the billiard ball and low water absorbance in the tip to allow sufficient chalk to be adhered thereon. SUMMARY OF THE INVENTION [0007] In viewing of the foregoing problems, it has been determined that epoxy resin reinforced glass fiber material used in the manufacturing of printed circuit boards and having strength characteristics such as an Izod impact strength 2.about.3 times greater than those of phenolic resin reinforced materials (for example, paper sheet, cotton cloth, and linen) is preferred to form the tip in a rivet (mushroom) shape in order to be easily adhered to the point ferrule in a combination. Said combination construction for the tip and point ferrule of the billiard cue made in this manner has sufficient strength not to be deformed when the combination is used in breaking the billiard ball, and chalk can be fully covered and sufficiently adhered to the tip due to the low water absorbance of the combination construction for the tip and point ferrule of the billiard cue. Additionally, sufficient momentum can be fully transferred to the billiard ball when it is hit, without losing precision. [0008] In general, the billiard cue tip is comprised of a tip and point ferrule, while there is also a compression packing between the tip and point ferrule designed to absorb the counter force of striking the billiard ball and subjected to the tip, the tip having an undercut head in the shape of flat disc so as not to damage the bush shaped point ferrule of plastic material during impact. The outer most part of the shaft is shaped into a small cylindrical shaped object to allow this small cylindrical shaped object to be inserted into the cavity of the bush shaped point ferrule. [0009] The manner of the combination construction (assembly) for the tip and point ferrule of the billiard cue described in connection with the drawings will be explained particularly with reference to the illustrated figures in FIG. 2.about.FIG. 4. [0010] In one embodiment of the combination construction for the tip and point ferrule of the billiard cue in this invention, the tip is manufactured from an epoxy resin reinforced glass fiber material that is used in the manufacturing of printed circuit boards. The material is formed into a rivet (mushroom) shape to allow the outer most part of the shaft that is shaped into a small cylindrical shaped object to be inserted into the cavity of the bush shaped point ferrule to connect the small cylindrical shaped object beneath the tip, to allow the compression packing located between the tip and point ferrule to absorb the counter force of striking the billiard ball such that the tip and point ferrule are not damaged during impact. [0011] The tip has an undercut head in the shape of a flat disc with a small cylindrical object beneath the tip forming a rivet (mushroom) shape, wherein the flat disc is about 12.75.about.13.3 mm, preferably 13.00 mm in diameter, and about 5.about.8 mm in thickness, while the small cylindrical object beneath the tip is about 6.about.7 mm in length. The bush shaped point ferrule of plastic material is about 19 mm in height to allow the small cylindrical object beneath the tip and the small cylindrical shaped object of the outer most part of the shaft to be capped therein and inserted into the cavity of the bush shaped point ferrule. A compression packing may not be needed between the tip and point ferrule. [0012] In another embodiment of the combination construction for the tip and point ferrule of the billiard cue of this invention, the tip is manufactured from an epoxy resin reinforced glass fiber material used in the manufacturing of printed circuit boards. The material is formed into a flat disc shape having an undercut head. The flat disc is about 12.75.about.13.3 mm, and preferably 13.00 mm in diameter, and about 5.about.8 mm in thickness. [0013] In another embodiment of the combination construction for the tip and point ferrule of the billiard cue of this invention, the tip and point ferrule of the billiard cue is manufactured from an epoxy resin reinforced glass fiber material used in the manufacturing of printed circuit boards and is integrally formed to define a cylindrical object of about 21.about.22 mm in height, and about 12.75.about.13.3 mm, preferably 13.00 mm in diameter and having an undercut head with a small cylindrical cavity of about 12.about.13 mm in length dug(drilled or formed) inside the center of the lower portion of the cylindrical object, to be matched directly with the small cylindrical shaped object, having a length about 12.about.13 mm, of the outer most part of the shaft. [0014] The tip used, which is manufactured from epoxy resin reinforced glass fiber material, of the combination construction for the tip and point ferrule of the billiard cue of this invention, is preferably of NEMA (National Electrical Manufacturers Association) grade F4, for example epoxy resin reinforced glass fiber material in the trade name of Gerolite-10, which possesses an Izod impact strength of about 7 ft-lb/inch (ASTM-D256), which is 2.about.3 times greater than those of conventional phenolic resin reinforced materials (for example, paper sheet (4 ft-lb/inch), cotton cloth (3 ft-lb/inch), and linen (2.2 ft-lb/inch)) and a compression strength of about 60,000 PSI (ASTM-D695), which is about 1.6 times greater that those of conventional phenolic resin reinforced materials (for example, paper sheet (36,000 PSI), cotton cloth (37,000 PSI), and linen (37,000 PSI)), therefore no deformation of the tip manufactured from the epoxy resin reinforced glass fiber material will occur, and the material endures impact forces when breaking or striking the billiard ball. [0015] Besides the high impact strength of the epoxy resin reinforced glass fiber material adopted as the material used for the tip of the combination construction for the tip and point ferrule of the billiard cue of this invention being high enough not to be deformed when breaking or striking the billiard ball, there is another reason to use the glass fiber material itself, which is a homologue of ceramic having a relatively low water absorbance (0.10% 24 hr, ASTM-D570) and is compatible with the calcium carbonate material of the chalk used in the billiard game. Thus, chalk can be fully covered and sufficiently adhered to the tip due to the low water absorbance of the combination construction for the tip and point ferrule of the billiard cue, therefore sufficient momentum can be fully transferred to the billiard ball when it is hit without losing precision. If the chalk is applied onto the conventional tip made of buffalo leather and rubber having high water absorbance itself, part of the chalk will not adhereand thus will not transfer enough momentum and the momentum remains along another vector for hitting the gravity center of the billiard ball, thus losing precision when hitting the billiard ball. BRIEF DESCRIPTION OF THE DRAWINGS [0016] FIG. 1 is an exploded view of a conventional billiard cue. [0017] FIG. 2 illustrates an exemplary embodiment of a billiard cue having an assembly for the tip and point ferrule of this invention. [0018] FIG. 3 illustrates another exemplary embodiment of a billiard cue having an assembly for the tip and point ferrule of this invention. [0019] FIG. 4 illustrates further another exemplary embodiment of a billiard cue having an assembly for the tip and point ferrule of this invention. DESCRIPTION OF THE PREFERRED EMBODIMENT [0020] With those and other objects in view, the invention consists in the construction hereinafter fully described, illustrated in the accompanying drawings, and set forth in the claims hereto appended, it being understood that various changes in size, shape, material, and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit of the invention or sacrificing any of the advantages thereof. Continue reading about Combination construction for a tip and point ferrule of a billiard cue... Full patent description for Combination construction for a tip and point ferrule of a billiard cue Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Combination construction for a tip and point ferrule of a billiard cue patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. 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