Patent ID: 11878222
Assignee: MIZUNO CORPORATION
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 8:
9. A bat comprising:
a handle having a proximate end and a distal end;
a barrel having a hollow portion that accommodates the distal end; and
a first damping section at least partially sandwiched between the handle and the barrel in an interior of the hollow portion,
the first damping section comprising:
a first portion in contact with each of the handle and the barrel in the interior of the hollow portion,
a second portion disposed nearer the proximate end than the first portion, the second portion being in contact with an inner peripheral surface of the barrel and not being in contact with an outer peripheral surface of the handle, and
a third portion disposed nearer the proximate end than the first portion and disposed at least partially inside of the second portion in a radial direction with respect to a center axis of the barrel, a gap in the radial direction being interposed between the third portion and the second portion,
in a cross section along the center axis of the barrel, the barrel having a depression depressed relative to the inner peripheral surface,
in the cross section, the second portion having a protrusion fitted in the depression, and
the third portion protruding toward the proximate end relative to the second portion in an axial direction along the center axis,
wherein a material of the first damping section has a D hardness of 60 or more, a loss coefficient tan δ of 0.11 or more as determined under conditions of a temperature of 20° C., a frequency of 150 Hz, and the amount of strain 3000 μST and a loss coefficient tan δ of 0.09 or more as determined under conditions of a temperature of 20° C., a frequency of 500 Hz, and the amount of strain 3000 μST.