US1876861A - Muffler - Google Patents

Description

J. J. COMPO Sept. 13, 1932.

MUFFLER Filed Dec. 21. 1929 gwuentoo Patented Sept. 13, 1932 UNITED STATES PATENT OFFICE JOHN J. COMPO, 0F DEFIANCE, OHIO MUFFLER Application filed December 21, 1929. Serial No. 415,655.

' mufller are reduced to a substantially constant current or flow of the gases at the outlet of the muffler.

The invention may be contained in muf flers that vary in their details of construc- ,7 tion and, to illustrate a practical application U of the invention, I have selected a mufiler containing the invention, and shall describe it hereinafter. The particular structure selected is shown in the accompanying drawing.

Fig. 1 is a longitudinal section of the particular mufiler selected for purposes of illustration. Fig. 2 is a view of a section taken on the plane of the line 2-2 indicated in Fig. 1. Fig. 3 is a view of a section taken on the plane of the line 33 indicated in Fig. 1. Fig. 4 is a View of a section taken on the plane of the line 44 indicated in Fig. 1. Fig. 5 is a view of a longitudinal section of the connector for connecting one of the ports of the muffler with exhaust pipes of different sizes.

The mufller illustrated in the drawing comprises a drum, or shell, 1 cylindrical in form,

"4 and a core 2 formed of a pair of interconflanges 8 that fit the interior of the shell 1. The discs are secured 'tothe cones 3 and 4. The small ends of the cones extend through the discs 5 and 7 which form the inlet and the outlet of the muflier. The ends of the cones are slotted on opposite sides, as at 10, and a split clamping ring 11 surrounds the slotted portions of the smaller ends of the cones whereby the mufiler may be connected in the exhaust pipe of the engine. The pipe may be inserted within theends of the cone, and the rings 11 may be secured in position to clamp the protruding ends of the cones about portions of the exhaustpipe. If the pipe is smaller than the inlet and outlet formed by the protruding ends of the cones, a connector 12 which have portions of reduced cross-sectional area are inserted within the ends of the cones, and the clamping rings 11 are clamped about portions of the connector 12 having the larger diameter, and the exhaust pipe may be inserted within the protruding portion of the connector. The connectors 12 are also provided with slots 13 located on opposite sides and so that when the exhaust pipe is inserted in position in the connector 12 the protruding portion of the connector may, in each case, be clamped about the exhaust pipe by means of the split clamping ring 14 which is located around the protruding portion of the connector 12. Thus, a tight connection may be made to the portion of the exhaust pipe located intermediate the mufiler and the engine and the portion of the exhaust pipe that forms the delivery pipe of the exhaust products from the muffler.

The discs 5 and 7 surround and are welded to the smaller ends of the cones, while the disc 6 is provided with a raised central portion 18, which forms interior and exterior cylindrical surfaces 19 into which andover which the larger ends of the cones 4 and 3, respectively, fit. This affords an exceedingly convenient means for connecting the parts of the core. Preferably, the cones are welded to the disc 6 along the surfaces that contact. with the substantially cylindrical surfaces of the disc 6.

A central cylindrical sheet metal pipe 22 fits the interior of the smaller end of the cone 3 and terminates at the disc 6. The disc 6 forms a closed wall within the cone 3. The pipe 22 is provided with a plurality of openings 23 in the vicinity of the disc 6 which opens into the interior of the cone 3 at the larger end of the cone and forms an expansion chamber for the expansion of the gases. The remainder of the pipe 22 is non-perforated, so that the gases are directed rto'the larger chamber formed by the larger end of the cone 3. Near the smaller end of the cone 3, the cone is provided with a plurality of openings 24. Thus, the gases pass to the portion of the cone having a reduced crosssectional area and through the openings 24 into the larger chamber 25, formed between the smaller end of the cone 3 and the shell 1, which again forms an expansion chamber, the gases previously having passed through a passageway having a reduced cross-sectional area. The gases then pass through the opening 26 formed exterior to the cone 3 and in the disc 6. The outward flow of the gasesis towards the end ofthe shell that surrounds the smaller end of the cone 4 and the gases expand and recoil from the disc 7. Intermediate the reduced pulsatory movements of the gas through the openings 26, it passes through the openings 27 from the reduced cross-sectional area of the chamber 28 into the larger end of the cone 29. The gases then pass through the smaller end of the cone to the outlet formed by the smaller end of the cone 4 that protrudes from the disc 7 and the shell 1.

In order to prevent rotation of the gases through the outlet, the smaller end of the core 2 is provided with partitions 32 that extend across the cone and, in the particular construction shown, divide the cone from substantially the midpoint of its axis to the outer end of the cone, into four chambers 33, which reduces all rotation of the gases, and enables a steady outward flow of the gases from the interior of the cone 4.

The core 2 comprising the cones 3 and 4 and the discs 5, 6, and 7, and the parts located within the cones, are first assembled, the cones being connected together by the disc 6. The flanges 8 of the discs 5, 6, and 7 being formed to fit the interior of the cylinder 1, the core may be assembled and then pushed into the cylinder 1. This forms an exceedingly convenient means of forming the mufiler and reduces the cost of manufacture.

I claim:

1. In a mufiler, a cylindrical drum, a core comprising a pair of cones and'three discs,

two of the discs surrounding the smaller ends of the cones and the third disc located at the larger ends of the cones, the said discs fitting the interior of the drum, a cylindrical tubular member located within one of the cones and extending to the central disc of the muf fier and having openings in the vicinity of the central disc, the last named cone having openings near the inlet of the mufiler, the central disc having openings exterior to the said cones, the other of the cones having openings near the central disc, the smaller end of the last named cone forming the outlet of the inuflier.

2. In a muflier, a cylindrical drum, a core comprising a pair of cones and three discs, two of the discs surrounding the smaller ends of the cones and the third disc located at the larger ends of the cones, the said discs fitting the interior of the drum, a cylindrical tubular member located within one of the cones and extending to the central disc of the muffler and having openings in the vicinity of the central disc, the last named cone having openings near the inlet of the mufller, the central disc having openings exterior to the said cones, the other of the cones having openings near the central disc, the last named cone having radially extending partitioning walls extending from the axis of the cone to the inner surface of the cone for dividing the interior of the cone into sector shaped compartments, the smaller end of the last named cone forming the outlet of the mufller.

In witness whereof I have hereunto signed my name to this specification.

JOHN J. COMPO.

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