Title:
MEASURING METHOD FOR INTERNAL PRESSURE OF TENNIS BALL
Document Type and Number:
Japanese Patent JPH06229864
Kind Code:
A
Abstract:
PURPOSE: To measure the internal pressure of a tennis ball without breaking the ball.
CONSTITUTION: The internal pressure of a tennis ball is measured without breaking the ball by measuring the deformation (forward deformation) of the ball at a certain load when the load applied to the ball is increased and the deformation (return deformation) of the ball at a certain load when the load applied to the ball is reduced and estimating the internal pressure from the difference between the return deformation and forward deformation.
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Inventors:
HIROOKA YOSHIYUKI
SASAKI TAKASHI
SASAKI TAKASHI
Application Number:
JP4199593A
Publication Date:
August 19, 1994
Filing Date:
February 05, 1993
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
A63B41/12; G01L11/00; (IPC1-7): G01L11/00; A63B41/12
Attorney, Agent or Firm:
Miwa Tetsuo
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