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US 4,874,062 AGranted
Muffler
AssigneeKojima Press Industry Co., Ltd.
InventorsKouichi Yanagida, Shinichiro Kano, Takeshi Gotou, Takashi Hirose
Life of this patent
Estimating the term…
Abstract
A muffler comprising a casing, a defining member for defining at least two resonance chambers in the casing, and a pipe for flowing a gas therethrough. Each of the resonance chambers has a different resonance frequency, and the pipe is communicated with each resonance chamber. Therefore, a plurality of noise frequencies can be suppressed.
Claims20
A muffler, comprising:
- a pipe having a tubular wall;
- a casing attached to an outer face of said tubular wall, and said casing covering a predetermined region of said outer face of said tubular wall to define a resonance chamber therein;
- a wall member in contact with said outer face of said tubular wall and extending essentially over the entire region of said outer face of said tubular wall;
- at least one separating wall connected to said wall member at one end thereof an connected to an inner wall of said casing, which faces said wall member, at another end thereof, to divide said resonance chamber into at least two resonance chamber portions;
- and
- communicating means for communicating an interior of said pipe with said resonance chamber portions, said communicating means having at least one opening means extending through both said tubular wall and said wall member.
3 more elements
Dependencies are inferred from the claim text.