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Title:
PRACTICE BALL
Document Type and Number:
WIPO Patent Application WO/2022/168960
Kind Code:
A1
Abstract:
The present invention provides a practice ball that produces an irregular behavior without significantly changing the shape of the ball itself or making an eccentric movement with a weight, the practice ball being characterized by including a spherical outer skin 2 and a plurality of mutually independent rubber tubes 3 housed inside the outer skin, wherein the plurality of rubber tubes 3 are configured to allow for independent adjustment of respective air pressures P1, P2, P3, and P4 thereof.

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Inventors:
NAGAMATSU TATSUKI (JP)
Application Number:
PCT/JP2022/004546
Publication Date:
August 11, 2022
Filing Date:
February 04, 2022
Export Citation:
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Assignee:
NAGAMATSU TATSUKI (JP)
International Classes:
A63B41/00; A63B41/02; A63B43/04; A63B69/00
Domestic Patent References:
WO2005044396A22005-05-19
Foreign References:
US20090318054A12009-12-24
JP2013141513A2013-07-22
JPH01293882A1989-11-27
US6093077A2000-07-25
US20080064542A12008-03-13
JP2021069416A2021-05-06
Attorney, Agent or Firm:
NISHIMURA, Ryuhei (JP)
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