The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2019
Filed:
Nov. 18, 2016
Yonex Co., Ltd., Tokyo, JP;
Masato Kawabata, Niigata, JP;
Naoto Ogawa, Niigata, JP;
Ryoichi Hanawa, Niigata, JP;
Toru Hiraga, Tokyo, JP;
YONEX CO., LTD., Tokyo, JP;
Abstract
To enhance a resilience performance of a ball at hitting the ball, a grommet is configured to include a strip-shaped portion extending in a predetermined direction and a cylindrical portion projecting from one surface of the strip-shaped portion, the cylindrical portion being a portion through which a string passes. A bulge portion is formed on a part on another surface of the strip-shaped portion, the part being along an inner periphery of the cylindrical portion. The bulge portion has a shape bulged more than the other surface of the strip-shaped portion, and the string is folded back at the bulge portion. A plurality of the protrusions are formed between the cylindrical portions adjacent to one another, the plurality of the protrusions being portions to which the string contacts.