RACKET
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Jan 28, 2015
filing date -
Feb 12, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A racket includes a head 8, a first foam 6a and a second foam 6b. The head 8 is formed from a fiber reinforced resin. The head 8 has an inside part 16, an outside part 18 and two middle parts 20. The foams 6 are joined to respective inner surfaces of the middle parts 20. Each foam 6 includes a matrix and a large number of bubbles dispersed in the matrix. In a cross section of the head 8, a ratio of an area of the foam 6 to an area of a space is equal to or greater than 5% and equal to or less than 50%. The foam 6 has a density of equal to or less than 0.30 g/cm3. The foam 6 has a 25% CLD measured in accordance with “JIS K6254” standard of equal to or less than 0.10 MPa.
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