Sound muffling device for internal combustion engines

Details Sound muffling device for internal combustion engines Sound muffling device for internal combustion engines

1991-07-25

1992-12-08

Gellner, Michael L.

Acoustics

Sound-modifying means

Housing or enclosure

181222, 181225, 181229, 181258, 181265, 181268, 181282, F01N 106

Patent

active

051700190

ABSTRACT:
A sound muffling device for use in lawnmowers includes a hollow body containing an aperture plate, a plurality of serpentine configured pipes, a plurality of fans, a double net having a bundle of wires, and a microporous plate, an adaptor having a sound inlet disposed on the exterior of the front end of the hollow body, and a sound outlet of the exterior of a rear end of the hollow body.

REFERENCES:
patent: 3461683 (1969-08-01), Valbjorn et al.
patent: 3656576 (1972-04-01), Gubela
patent: 4032310 (1977-06-01), Ignoffo
patent: 4050913 (1977-09-01), Roach
patent: 4111081 (1978-09-01), Hilliard et al.
patent: 4616732 (1986-10-01), Carboni
patent: 4643271 (1987-02-01), Coburn
patent: 5062790 (1991-11-01), Loberger et al.

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