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:
Apr. 29, 2008
Filed:
Apr. 25, 2003
Hirofumi Goda, Chiba, JP;
Minoru Sugawara, Chiba, JP;
Yoshiaki Saito, Chiba, JP;
Takeharu Suga, Hiroshima, JP;
Masaharu Okamura, Hiroshima, JP;
Toshifumi Sakai, Hiroshima, JP;
Hirofumi Goda, Chiba, JP;
Minoru Sugawara, Chiba, JP;
Yoshiaki Saito, Chiba, JP;
Takeharu Suga, Hiroshima, JP;
Masaharu Okamura, Hiroshima, JP;
Toshifumi Sakai, Hiroshima, JP;
Prime Polymer Co., Ltd., Tokyo, JP;
Daikyonishikawa Corporation, Hiroshima, JP;
Abstract
A sound absorbing bodyhas a molded bodyincluding two unexpanded layersand an expanded layerhaving a number of voids and held between these unexpanded layers, a plurality of holesA of a depth that passes through the unexpanded layerand does not reach the other unexpanded layerare formed at any positions on the molded body, a cross-sectional area of the holeA is in the range from 0.785 to 314 mm, and the pitch is 1 mm or larger. Laminating a plurality of materials is not required, and both the sound absorbing capability and sound insulating capability can be secured by integral molding, and further, only unpleasant sounds can selectively be absorbed.