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US 2023/0218952 A1Published application
Table tennis ball having marking to make a ball rotation detectable
AssigneeESN Deutsche Tischtennis Technologie GmbH
InventorsMatthias Ottenberg, Konrad Tiefenbacher, Thomas Kraus
Life of this patent
Estimating the term…
Abstract
A table tennis ball which has, on the spherical surface thereof, a marking to make a ball rotation measurable. The marking contains a number of marking points, which are distributed on the ball surface in such a way that the standard deviation of the lengths of the orthodromes between each of the marking points and the three nearest neighboring points thereof is at least 12% of the average value of these lengths, and the minimum length of the orthodromes between each of the marking points and the three nearest neighboring points thereof is at least 40% of the average value of these lengths.
Claims19
A table tennis ball, comprising:
- a spherical ball surface;
- and
- a marking applied to said spherical ball surface for making a ball rotation metrologically detectable, said marking having a number of marking points, said marking points being distributed on said spherical ball surface such that a standard deviation of lengths of orthodromes between each of said marking points and its three closest neighboring marking points is at least 12% of a mean value of the lengths, and that a minimum length of the orthodromes between each of said marking points and its said three closest neighboring marking points is at least 40% of the mean value of the lengths and/or at least 120% of a quotient of a ball radius to a square root of the number of said marking points.
A table tennis ball, comprising:
- spherical ball surface;
- a marking applied to said spherical ball surface for making a ball rotation metrologically detectable, wherein said marking has a number of marking points, said marking having eighteen of said marking points;
- wherein starting from a first marking point of said marking points:
- a length of an orthodrome to its closest neighboring marking point in relation to a ball radius is 0.54±20%;
- a length of an orthodrome to its second-closest neighboring marking point in relation to the ball radius is 0.91±20%;
- and
- a length of an orthodrome to its third-closest neighboring marking point in relation to the ball radius is 0.99±20%;
- wherein starting from a second marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.54±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.72±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.83±20%;
- wherein starting from a third marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.78±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.84±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.87±20%;
- wherein starting from a fourth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.72±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.84±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.85±20%;
- wherein starting from a fifth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.79±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.83±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.85±20%;
- wherein starting from a sixth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.67±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.73±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.94±20%;
- wherein starting from a seventh marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.59±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.76±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.90±20%;
- wherein starting from an eighth marking point of said marking points:
- a length of the orthodrome to its closest neighboring point in relation to the ball radius is 0.82±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.87±20%;
- and
- a length of the orthodrome to its third-closest neighboring point in relation to the ball radius is 0.89±20%;
- wherein starting from a ninth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.51±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.91±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.95±20%;
- wherein starting from a tenth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.75±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.75±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.78±20%;
- wherein starting from an eleventh marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.82±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.88±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.89±20%;
- wherein starting from a twelfth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.67±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.79±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.84±20%;
- wherein starting from a thirteenth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.75±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.82±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 1.02±20%;
- wherein starting from a fourteenth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.51±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.92±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.98±20%;
- wherein starting from a fifteenth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.82±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.84±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.90±20%;
- wherein starting from a sixteenth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.59±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.74±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 1.10±20%;
- wherein starting from a seventeenth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.74±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.75±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.76±20%;
- and
- wherein starting from an eighteenth marking point of said marking points:
- a length of an orthodrome to its closest neighboring point in relation to the ball radius is 0.73±20%;
- a length of an orthodrome to its second-closest neighboring point in relation to the ball radius is 0.88±20%;
- and
- a length of an orthodrome to its third-closest neighboring point in relation to the ball radius is 0.91±20%.
90 more elements
Dependencies are inferred from the claim text.