Games using tangible projectile – Billiards or pool – Cue
Reexamination Certificate
2007-11-20
2007-11-20
Graham, Mark S (Department: 3711)
Games using tangible projectile
Billiards or pool
Cue
Reexamination Certificate
active
10971564
ABSTRACT:
In an embodiment of the invention, a vibration damping shaft of a cue stick comprises a shaft that is configured to form an axially rigid ensemble by mating with another segment of a cue stick. The shaft includes damping material that reduces the vibration of the shaft when a ball strikes the shaft. The damping material may have a density greater than wood. The damping material may be configured as an annular region in the shaft, or in any other configuration that reduces shaft vibration. Damping materials include composites, such as piezoelectric materials, with fibers that are generally aligned to reduce shaft vibration. Another embodiment of the invention utilizes a universal shaft insert, allowing the shaft to fit another segment of a cue stick having a particular joint pin configuration. Features of the a vibration damping shaft may also be incorporated into a cue stick that is not collapsible.
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Wikipedia, “Piezoelectricity”, Dec. 15, 2003, 3 pages.
Drawing of coupling rod manufactured by Bender Cues for securing to one stick portion of a cue stick (Jul. 13, 1992).
Drawing of a prior art cue stick portion having a coupling rod and joint collar (at least by 1985).
Drawing depicting a coupling joint which engages in three revolutions. The smooth elongate tip extending from the external threaded region is not in a close fit with the bore extending from the internal threaded region upon engaging the two threaded regions.
Drawing depicting a coupling joint which has an external threaded region characterized by a significant number of threads. The internal threaded region is characterized by the two threads. Extending from the internal threaded region is a smooth bore for receiving the external threaded region. The coupling joint engages in a significant number of revolutions.
Costain Paul D.
Stroud Bill
Graham Mark S
Hamilton Brook Smith & Reynolds P.C.
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