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Audio Signal Processing

Muffler

Musical-tone signal forming apparatus for an electronic musical instrument

In FIG. 1, a clock pulse oscillator or generator 1 is provided which generates a clock pulse ...

Method for manufacturing an otoplastic or an ear adaptor member

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Integrated circuit with memory comprising a fraud-prevention device

An object of the invention therefore is an integrated circuit comprising an electrically erasable ...

Binary logic level electrical detector namely to prevent the detection of secret codes contained in a memory card

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Method for the programming of the memory cells of a memory and a circuit to implement this method

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MOS fuse with oxide breakdown and application thereof to memory cards

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Audio system operable in directional and non-directional modes

It is therefore an object of the present invention to solve the aforementioned technical problems ...

Corner-based image matching

One aspect of the invention is a method of matching a test image to a reference image. A reference ...

Automated setup verification system

OF THE PREFERRED EMBODIMENT Referring now to the drawing wherein like parts and elements are ...

Muffler

Details

Inventors: Hasui, Hiroshi; Suyama, Eizo;
Assignee: Nihon Radiator Co., Ltd. ()
Primary Examiner: Kelly; Donald G.
Assistant Examiner:
Attorney, Agent or Firm: Hueschen; Gordon W.

A muffler comprising: an upper case provided at the opposite ends with semi-cylindrical inlet and outlet sections respectively and having an outwardly raised central portion and an integral flange-like edge portion; a lower case joined at a flange-like edge portion to that of said upper case and substantially symmetrical with said upper case with respect to the underside thereof; an exhaust inlet tube forming member having at least a semi-cylindrical inlet section inserted in a cylindrical inlet formed by the inlet sections of said upper and lower cases joined together and a gutter-like guide section connected to said inlet section and being joined to said upper case, lower case or both of them, said forming member being provided adjacent to an end thereof with a perforated portion; and an exhaust outlet tube forming member having at least a semi-cylindrical outlet section fitted in a cylindrical outlet formed by the outlet sections of said upper and lower cases and a gutter-like guide section connected to said outlet section and being joined to said upper case, lower case or both of them; the exhaust inlet and outlet tubes formed in this way within the muffler body being communicated with each other through an exhaust gas passage formed between the outer surface of said individual component parts and the inner surface of said case and also through said passage, the end of said outlet tube being positioned behind the leading end of said inlet tube.

DETAILED DESCRIPTION What is claimed is: 1.
A muffler comprising: an upper case provided at the opposite ends with semi-cylindrical inlet and outlet sections respectively and having an outwardly raised central portion and an integral flange-like edge a lower case joined at a flange-like edge portion to that of said upper case and substantially symmetrical with said upper case with respect to the underside thereof; an exhaust inlet tube forming member having at least a semi-cylindrical inlet section inserted in a cylindrical inlet formed by the inlet sections of said upper and lower cases joined together and a gutter-like guide section connected to said inlet section and being joined to at least one of said upper case and said lower case, said forming member being provided adjacent to an end thereof with a perforated portion; and an exhaust outlet tube forming member having at least a semi-cylindrical outlet section fitted in a cylindrical outlet formed by the outlet sections of said upper and lower cases and a gutter-like guide section connected to said outlet section and being joined to at least one of said upper case and said lower case; the exhaust inlet and outlet tubes formed in this way within the muffler body being in communication with each other through an exhaust gas passage formed between the outer surface of said inlet and outlet tube forming members and the inner surface of said upper and lower cases, the lengths of said inlet and outlet tubes within the muffler body being in spatially overlapping relationship 2.
A muffler according to claim 1, wherein said upper and lower cases are respective single pieces.
3.
A muffler according to claim 1, wherein said exhaust inlet tube forming member and said exhaust outlet tube forming member are each separate from the other.
4.
A muffler according to claim 3, wherein said exhaust inlet tube forming member is a guide piece provided at an end with a semi-cylindrical inlet section fitted in the inlet section of said lower case, having a gutter-like portion connected to said inlet section, closed at the other end and provided at said other end with a perforated section, and also wherein said exhaust outlet tube forming member is a guide piece provided at an end with a semi-cylindrical outlet section fitted in the outlet section of said upper case, having a gutter-like portion connected to said outlet section and open at the other end

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