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. 16, 1996
Filed:
Dec. 22, 1994
Applicant:
Inventors:
Masahiko Kato, Yokohama, JP;
Naoki Kozuka, Yokohama, JP;
Assignee:
Ricoh Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G10K / ;
U.S. Cl.
CPC ...
181205 ; 181225 ;
Abstract
An acoustic noise reduction apparatus for an office automation device is provided on a surface of an outer shield of the office automation device and has a hole therethrough. The body member of the apparatus defines an internal volume which covers the hole. A control member is operatively connected with the body member and divides the body member into a hollow portion, a duct portion, and a silencer portion. The hollow portion and the duct portion form a Helmholtz resonator within the body member.