US1539967A - Exhaust muffler - Google Patents

Description

June 2, 1925.

1,539,967 C. G. STOCKTON EXHAUST MUFFLER Filed March 31, 1925 4 Sheets-Sheet l ,1 I I M I 1 ATTORNEYS,

C. G. STOCKTON June 2, 1925,

EXHAUST MUFFLER Filed March 31, 1923 4 Sheets-Sheet 2 m IVENQTO ATTo'RNEYs.

C. G. STOCKTON EXHAUST MUFFLER Filed March 31. 1923 4 Sheets-Sheet 5 VENTR w 4 ,1, 1

ATTORNEY June' 5- 1,539,967

C. G. STOCKTON EXHAUST MUFFLER "Filed March 51, 1923 4 Sheets-Sheet 4 m 9% '4 v I 61AM ATTOR N EYS PatentedjJune 2, 925' UNITED STATES PATE T OFFICE.

G. meg-m, or ocmrrchova, m'w JERSEY.

i p mans! lmrrm lencer for the exhaust of an internal combustionengine.

\ The prima object ofthe invention is to provide a m of thetype in which the exhaust gases are divided into 'a plurality of jets which are upen and counteract each ying a novel and improved caused to impin other and embod construction and arrangement of passages for dividing the exhaust gases, reducing the -1ng them into the atmosphere with a minimum of'noise, back pressure and vibration oftheengine. I i

' Further objects are to provide a mufller i of this character which cannot become Tv loaded or backfire and which will clean itself and will not collect soot; to rovide 1' such a muflier which is small, hght' in weight and simple and inexpensive in con- I 3Q's truction, and to obtain other results and advantages as may be brought .out by the i following descri tion. 7

Referring to e accompanying drawin in which like numerals of reference in cate the same parts'throughout the several views, i

Figure l'is embod 'myinvention showing the same ap li to an exhaust pipe;

igure 2 is an enlarged to a partially in section, of the m er;

Figure 3 is a vertical longitudinal sec- Figure 7 is a side elevation partially in section of the jet forming member of the inlet pipe;

Fi form of jet forming member; s

' Figure 9 is a vertical longitudinal secressure and velocity thereof and discharg a side elevation of a muflier plan view,

gure 8 is a similar view of *a modified Application med larch 31, ms. Serial Io. 029,030.

tional view through a modified construction of the mufller taken on the line 9- of Fig. 15;

Figure 10 is adetached perspective view of the jet forming member of the modified construction of mufller;

Figure 11 is a view similar'to Fi 4 of the inlet pipe of-the modified muflfier;

Figure 12 is aisimilar view with the jet forming member removed;-

Flgure 13 is a vertical longitudinal sectional view taken on the line 1313 of or of the character described,

lgure 14 1s a transverse sectional view taken on theline 14-14 of Fig. 13;

Figure 15 is an end view of the outlet end of the modified mufller;

Figure 16 isa side elevation of said mufller, and j Figure 17 is an end view of the inlet e111.

of the same:

. The "muiiler consists in general of an ililet pipe'divided into a plurality of oppositely disposed substantially parallel longitudinal chambers communicating at one end with 1 the exhaust pipe of the engine, said chambers being spaced to provide passages therebetween-transverse of said pipe and eachhaving at least-one wall thereof opposite.

one wall of another and formed with a plurality of openings each opposite a corres nding ,ope'ning of said wall of another c amber and communicating with one of said transverse passages, said openings dividing the exhaust gases of the engine into a pluralityof jets; An outlet casing is mounted'upon and surrounds said inlet pipe 7 so as to'form an annular passage between said casing and said inlet pipe and has a plurality of circumferentially spaced longitudinal outlet passages communicating with said annular passage throughout their lengths, said' longitudinal passages of the casing having a staggered relation to said transverse passages and opening into the atmosphere at a point remote from the inlet end of said inlet pipe, also gradual] increasing in carrying capacity tower the outlet end.

The exhaust gases enter said chambers of the inlet pipe, pass through said openings in jets and impinge upon or counteract the jets from op os'ing openings, thereupon passing throu said transverse passages of the inlet pipe between said chambers into said annular passage and then into said outand discharge the gases into the atmosphere at a comparatively low pressure and velocy- In the embodiment oi the invention shown in Figures 1-8' inclusive the reference character 1 designates the inlet pipe of the muf-p fler which is closed at one end as at 2 and adapted to be connected at the other end as at 3 to the exhaust m of an internal combustion engine. he said pipe 1 is di-' vided into two oppositely disposed substantially parallel longitudinal chambers 4 which are spaced apart on substantially a diametric plane of the pipe to provide a' passage 5 between them extending transversely of the pipe. Said chambers communicate at one end with the pipe 1 to 'receive the exhaust gases from the exhaust pipe E, and the wall of each chamber opposite the adjacent wall of the other chamher is provided with a plurality of jet openings 6 which communicate with the transverse passage 5. Communication between said passage 5 and the pipe-1 is only through the said openings 6, and each of 'said openings is disposed directly opposite a corresponding opening in the other chamber.

For convenience in construction, the chambers 5 may be formed 'by a pair of spaced plates 7 connected at their ends and projecting through diametrically opposite slots 8 in the walls of the pipe 1.- It will be understood, however, that any other suitable construction may be utilized. The closed end of the pipe 1 is also preferably beveled as shown so as to provide inclined end walls at acute angles to the direction of flow of the gases through the openings 6.

The pipe 1 is surrounded by and carries an outlet casing 9 which encloses the transverse passage 5 and forms an annular passage 10 between itself and the pipe 1, said casing being formed with diametrically opposite longitudinal passages 11 which communicate with the annular passage 10 throughout their length and open into the atmosphere at points remote from the inlet end of the pipe 1. The said passages 11 are arranged in staggered relation to the passage 5 and gradually increase in carrying capacity toward the outlet end. In the present instance said casing is shown as formed with a substantially cylindrical body portion 12 concentric with the pipe 1 with flattened fin-shaped lateral projections 13 which form the passages 11. For mounting the casing on the inlet pipe, I may form the inner end of the casing with a reduced collar 14 to tightly fit the pipe 1 and rovide set screws 15 for preventing longitu inal movc- Said beveled portions 16 also form a slotlike passage substantially a continuation oi the passages 11.

.In the operation of the mufller, the exhaust gases pass into the pipe 1 and are divided by the two chambers 4. The gases then pass'at substantially right angles to their original direction of movement through the openings 6 in the form of jets each of which impinges upon or counteracts the jet from the corresponding opening in the other chamber. The velocity o fthe ases is thus decreased, and the gases then ow through the passage 5 in both directions into the annular passage 10, through said passage and into the longitudinal outlet passages 11 of the outlet casing. L The annular passage 10 and the passages 11 permit gradual expansion of the gases and consequent reduction in pressure thereof so that they are discharged from the passages 11 at a comparatively ow pressure and velocity.

The opening 6 may be circular in shape as shown in Figures 1-7 inclusive, or may be slots 18, as shown in Figure 8.

' In Figures 9-17 inclusive a. modified construction of mufller is shown. In this form of the invention the inlet pipe 20 is divided into four substantially parallel longitudinal passages 21 which communicate at one end with the pipe 1 to receive the exhaust gases from the engine. Each passage 21 is formed with two substantially radial walls 22 which are arranged in spaced and opposed relation to corresponding walls of adjacent chambers, said walls being formed with openings 23 similar to the openings 6 each of which is arranged substantially directly opposite a corresponding openin in the op sed wall of the adjacent cham er. The sald chambers are arranged inspaced relation so as to form a plurality of transverse passages 24 therebetween, each of which communicates with the openings 23 in. two of the chambers 21.

An outlet casing 25 is mounted on the inlet pipe 20 and provides an annular space 26 between itself and said pipe, said outlet casing being formed with four longitudinal passages 27 each communicating throughout its length with the annular passage 26 and opening into the atmosphere at a point remote from the inlets of the chambers 21.

Said passages 27 are arranged in staggered crease in carrying capacity toward their out- 30 let ends.

a In this forin of the invention the walls 22 of the chambers maybe carried by a cap '28 adapted toclom the outer end of the in 'let pipe 1, said walls being connected at' their 5 inner ends and adapted to fit in slots '29 formed in the walls of the inlet pipef and extending throughthe end thereof, as clear-' i 1y shown in F iguresl'l and 12. The sum is substantially the same as lthe o ration same result.

, without appreciable of the muflier shown in Figures 1- inclusive, the gases. entering the four chambers '21, passing through the openings 23 and impinging in the-passages 24, thereupon pass ing into the annular passage. 26 and thence into the longitudinal outlet passages 27 of the outlet casing. a 1

One main advantage of-this construction is that it is possible to make-the mufiler about I half the length of the mufller shown in Fig ures 1 and yet obtain substantially the Both forms of the inufiler my be conven ientl formed "ofsheetvmetal, are light in weig t and simple and inexpensive in construction; and mufiers embodying the invention have been foundto reduce the noise incident to the exhaust to a minimum ressure or vibration of the engine. It iS'llIl ble for the mufllers to become loaded or back-fire, and nosoot caneollect in the'mufller due to the. fact that there are no pockets therein and the direction of travel ofthe' gasesis alwa s substantially parallel to the walls of t e respective passa While I have s own the mufller embod in certain details of construction, it wil .be' understood that this is only for the purpose of illustrating-the principles of the invention and that many -modifications. and changes canbe'made in these details with out departin ghfrom the s irit or sco of the inventlon. erefore, do not wish to be understood as restricting myself except as required by the following. claims when construed in the light of the prior art.

- Having thus escribed the invention, what Iclaimis: v 1. A mufller comprising an inlet pipe having a plurality of oppositely disposed spaced chambers providm passages therebetween transverse of sai inlet pipe, each of said chambers being ada ted 'to receive" exhaust gases at one end an being formed in its wall opposite a wallof an adjacent,

chamber with a plurality of openings communicating with the one of saidpassages between said adjacent chambers, each of said openings being I corresponding 'opemng m adjacent .inlet pipe.@ F

2. A mufller comprising an inlet pipe having a pluralityof oppositely disposed spaced a pipe spaced d p s a p chamber, and an outlet casing surrounding saidinlet pipe in spaced relation thereto to of outlet openings communicating .with said annular passage and arranged in staggered relation to said transve e passages of the longitudinal chambers providing assages 'therebetween transverse of said i et pipe,

each of said chambers being adapted to re-.

ceive exhaust gases at one end and being formedin its wall opposite a wall of an adjacent chamber with a plurality of openings communicatingwith' the one' of said passages between said adjacent chambers,

each of said openings being disposed opposite a corresponding opening 111 the adjacent Y chamber, and an outlet casing surrounding said inlet pipe in spaced relation thereto to form an annular passage between 'said inlet and said casing-communicating with said transverse passages of the inlet pi said casing being formed with a. plurahty of longitudinal passages communicating throughout their lengths with said annular passage and opening into the'atmosphere at ints remote from the inlets of said cham rs, said passages increasing in carrying capacity toward their outlet ends. 7 h 3. A mufiler comprising an inlet pipe having a lurality of oppositely disposed therebetween transverse of said inlet pipe, each of said chambers being,

adapted to receive exhaust gasesfat one end openings communicating'with the one of said passages between said adjacent chambers, each of said openings being disposed v op its a cor nding opening in the adizh ent chamber, and an outlet casin surrounding said inlet pipe in spacedre ation .thereto to form an annular passage between said inlet pipe and said casing communicatin' with said transverse passagesof the.

, in ct ipe, said casin being formed with a mg through the walls thereof each of said ongitudinal chambers providing 1 g and being formed in its wall opposite a wall 'of-an ad acent chamber with a plurality of chambers provided in its wall opposite a wall of an adjacent chamber with openm disposed at substantiall right angles to said chamber and the oneo sard transverse pas sages between said adjacent chambers and communicating with said passage, each of said openings being disposed substantially opposite an opening in t e'said wall of the adjacent chamber, and an outlet casing including a body portion surrounding said inlet pipe in spaced relation thereto to form an annular passage between said body portion and said pipe, said casing being provided with fin-shaped lateral projections 'foi'ming longitudinal outlet passages com municating throughout their lengths with said annular passage and opening into the atmosphere at points remote from the inlets of said chambers of the inlet pipe. i

5. A mufiler comprising an inlet pipe closed at one end and divided into a p urality of longitudinal chambers spaced on diametrio planes of said pipe to provide passages transverse of said pipe and opening through the walls thereof each of said chambers provided in its wall opposite a wall of an adjacent chamber with openings disposed at substantiallyright angles to said chamber and the one of said transversepassages between said adjacent chambers and communicating with said passage, each of said openings being disposed substantially opposite an opening in the said wall of the adjacent chamber,-and an outlet casing including a body portion surrounding said'at inlet pipe in spaced relation thereto to form an annular passage between'said body portion and said pipe, said casing being rovided with fin-shaped lateral projectionsforming lon itudinal outlet passages com- "40 municating t roughout their lengths with said annular passage and opening into the atmosphere at points remote from the inlets of said chambers of the onlet pipe, said out- 1 let passaes increasing in carrying capacity toward t eir outlet ends.

ems. e. STOCKTON.

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