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:
Dec. 28, 1999
Filed:
Feb. 04, 1999
Hiroshi Shima, Tokyo, JP;
Toshiyuki Watanabe, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A noise control apparatus adapted for installation on top of a straight upright sound barrier, existing or newly erected, is provided which comprises a main body formed from a first screen inclined towards a sound source and a second screen inclined away from the sound source to have a generally V-shaped cross section; the first screen having formed at the top thereof a first additional screen inclined away from the sound source; the second screen having formed at the top thereof a second additional screen inclined towards the sound source; and the distance between free ends of the first and second additional screens being 55 to 88% of that between the tops of the first and second screens. This sound barrier structure has a highly improved effect of noise control while being very compact and lightweight.