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Publication numberUS1299326 A
Publication typeGrant
Publication dateApr 1, 1919
Filing dateOct 8, 1917
Priority dateOct 8, 1917
Publication numberUS 1299326 A, US 1299326A, US-A-1299326, US1299326 A, US1299326A
InventorsEmmet P Gray
Original AssigneeEmmet P Gray
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1299326 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

v E; P. GRAY.


APPLICATION men OCT. a. 19m.

Patented Apr. 1, 1919.



Specification of Letters Patent.

Patented Apr. 1, 1919.

Application filed October 8, 1917. Serial No. 195,256.

. To all whom it may concern:

Be it known that I, EMDIET P. GRAY, a citizen of'the United States, and residing at- Detroit, in the county of \Vayne and State of Michigan, have invented a new and Improved Mufiler-Valve, of which the following is a specification.

This invention relates to means for using or disposing of the burnt gases of automobile engines so that they will have the least objectionable effect on the power of the engine, and its object is to provide a muflier valve which may connect the mufller to a heating system for the body of the automobile or which may be used as a cut-out.

This invention consists in combination with a mutiier formed of a chamber to re ceive the exhaust and means to conduct the exhaust thereto, of a head for the chamber and a rotatable valve body connected to said head, and a plurality of other chambers, one within the other, surrounding the first and adapted to receive the exhaust therefrom, said head having a constantly open discharge passage connecting to the outer chamber. This invention further consists in the details of. construction illustrated in the accompanying drawing and particularly pointed out in the claims.

In the accompanying drawing, Figure 1 is a side elevation of the muflier and valve body. Fig. 2 is an elevation taken from the left in Fig. 1. Fig. ,3 isa similar elevation taken from the right. Fig. 4 is a central longitudinal section Fig. 1.

Similar reference characters refer to like parts throughout the several views.

The mufiler shown in the drawin is of the general character shown in my atent No. 820,566, dated May 15, 1906, and consists of three drums or chambers '1, 2 and 3, the inner and outer "being each referparallel to the plane ably formed of two thicknesses 0 sheet i sired. This nozzle connects to the chamsteel with a layer of asbestos between them. The Inlet end or front head 4 may be formed with circular flanges 5, 6 and 7 to center these drums.

The outlet end or rear head 8 may also have centering flanges 9, 10 and 1,1, and is formed with a nozzle 12 to receive the pipe 13 which, however, may be omitted if deber between the drums 2 and 3. The head 4...may be formed with a neck 14 to receive the exhaust pipe 15 through which the burnt gases from the engine enter the inner drum l. From here the gases pass through the holes 16 in the rear end of this drum into the chamber between the drums 1 and 2, in which space the gases pass forward to the holes 17 in the drum 2 and through these holes into the chamber between the drums 2- and 3, and thence rearward to the nozzle 12.

Exhaust gases are caused to pass into radiators in the. bodies of automobiles to heat the bodies. nect to the pipe leading from the engine to the muflier or to the discharge opening of the mufiler, in which latter case the gases have been cooled because they have been. forced to pass through all the compartments of the muflier. Thi results in excessive back pressure and is very undesirable.

Taking the gases from the exhaust pipe before they get to the mufiler results in a noisy heater which responds to the pulsations of the engine. It also results in serious back pressure.

In the present case, a circular'flange 20 is formed on the rear head 8 to receive one end of the valve body 21. preferably formed with a groove 22 to receive the screw 23 carried by this flange 20, whereby the part 21 is held in position. A valve stem 24' carries the valve 25 and a crank arm 26 on the stem positions the valve. A spring 27 may be employed to hold the valve closed and the body 21 may have an extension 29 to receive the pipe 30 that connects to the radiator. This pipe 30 is preferably a flexible metal These radiators usually contube. Bolts 31 secure the heads and drums 7 together. O

As this is a stock construction, provlslons may be made for adapting it to various.

types of automobiles and various locations of radiators by forming the valve body 1 with a bend so that the pipe 30 may extend at an angle to the axis of the mufiier. This also permits the valve to be used as a cut-out in cities where direct exhaust downward toward the roadway is forbidden. the method zle 12 is always open. Because of the straight path to the atmosphere from the engine through the pipe 15, the inner chamber of the muffler, thevvalve body 21, the pipe and the radiator, this back pressure must be less than when the gases pass through the muflier in the usual manner, for otherwise the gases Will pass through the muffler as before. When the valve 21 is used as a cut-out, a straight path is provided for the gases from the rear end of the exhaust pipe 15.

I claim 1. In a mufiler valve, the combination with the head of a muflier having an opening connecting to that portion of the muflier which receives the direct exhaust of the engine, said head having a circular flange around the opening, a valve body rotatably mounted in said flange, and a discharge pipe attached to said valve body and extending at an oblique angle from the head, which pipe may be caused to extend at any desired angle by turning the valve body.

2. The combination with a mufiler having circular heads and drums within each other,

said heads having inlets and outlets connecting into the chamber formed by the inner drum, one of the heads having a constantly unobstructed outlet connecting with the chamber Within the outer drum, and a valve body rotatably mounted in the outlet connecting into the inner chamber, said valve body having an angular discharge pipe which may be pointed in any desired direction by rotatingthe valve body.

3. The combination with a muflier having an inner chamber and a plurality of chambers surrounding said inner chamber and connecting therewith by means of holes in their Walls, means to convey the exhaust of an engine to the inner chamber, a constantly unobstructed and invariable conduit for conducting the gases from the outer chamber to the atmosphere, a rotatable valve body connecting to the inner chamber, and an adjustable valve in said body to control the flow of gases therethrough, said body having an angular discharge pipe which may be pointed in any desired direction by rotating the valve body.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2543461 *Jul 20, 1949Feb 27, 1951Aero Sonic CorpMuffler with plural side branch chambers
US3181646 *Apr 15, 1963May 4, 1965Edwards Howard CSilencer having contiguous concentric layers of sound absorbent material
US3677365 *Dec 9, 1970Jul 18, 1972Gidon Ind LtdAutomotive exhaust system
US4465154 *Mar 16, 1981Aug 14, 1984Hinderks M VVehicle gas extractor
US5014817 *Jul 25, 1989May 14, 1991Mazda Motor CorporationEngine exhaust apparatus and method
U.S. Classification181/236
Cooperative ClassificationF01N1/166