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Publication numberUS953778 A
Publication typeGrant
Publication dateApr 5, 1910
Filing dateJun 28, 1909
Priority dateJun 28, 1909
Publication numberUS 953778 A, US 953778A, US-A-953778, US953778 A, US953778A
InventorsHamner J Cordle
Original AssigneeEdward A Pendergrass, Hamner J Cordle
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 953778 A
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Description  (OCR text may contain errors)




Patented Apr. 5,1910.

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Specification of Letters Patent.

Patented Apr. 5, 1910.

Application filed June 2S, 1909. Serial No. 504,750.

view partly in section to show the interior of the muliier. Fig. 3 is a transverse sectional vienT through the muffler looking toward the escape end.

an' annular groove 1st similarlyv arranged to ing 1() this head is provided ivith a plu? rality of series of perforations 26, said perrorations having their axes parallel to the axis of the mutlier so'that gases escaping To alt whom it may concern.' the groove 12 and adapted to receive the Be it known that lf, Halimi-1r. d. Corinna, front edge ot' the casing 10.

citizen of the United States, residing at The casing l0 is imperforate but the back Littleton, in the county of Halifax, Statev llQ/Ml ll iS 'pIOVCled With a Central boss 15 5 of North Carolina, have'invented certain perforated and threaded to receive the end 60 new and useful improvements in lilniilers; Of an @Xhaust pipe 16 which is threaded to and I do hereby declare the following to be GngngQ 'l'hO threads of jthe boss l5. Both a full, clear, and exact description` Toithe the liront and back heads are provided with invention, such as Will enable others skilled ,i bolt receiving apertures 17 wherethrough o in the art to which it appertains to make pass bolts 1S provided with nuts 19 at one 65 and use the game, end and head 2O at the other, these bolts This invention relates to muiliers such as and nuts being' for the purpose of holding are used on internal combustion engines to the heads securely in position on the casreduce the noise made by the escape of the Inn' l0.

gases 0f Combustion into the atmggphere, 7ivithln the Ontel Casing l0 lS In inner 70 One object of the invention is to improve GnSinQ; 2l Of a gnelal Cylindrical form, but the general construction of devices or' this this form is broken at spaced intervals by Character, longitudinal depressions, one side of each Another object oi the invention to cause of said depressions forming a tangent with i the escaping gases to travel'in a helical path inspect lo the aXiS of the cylinder as clearly 75 Within the mutiier until the torce oi escap nClClted at 22, While the other Side forms ino' gases has been greatly reduced. a secant extending from the inner edge lVith the above and .other objects in vieiv 0f the tangent portion as indicated at 23. as will be hereinafter apparent7 the inven- The inner Casing' 2l iS Of Substantially Unltion consists in general of an inner and fOlln length With the Outer casing l0 and 80 outer casing, the inner casing being of novel i the end edges of this inner casing are held form, and improvements formed in the respectively in suitable grooves 24 in the inner and outer casings arranged te use bach: head and 25 in the front head, so that the escaping gases to travel in helical the inner casing 21 is at all times kept in path While escaping. concentric relation to the outer casing 10. The invention further Comisi@ in Certain 'ln order to support this inner casing as Well novel details of construction and combinaas to keep the bolts 18 out of the 4path of tions of parts hereinafter fully described, the escaping gases these bolts are so posiillustrated in the accoi'npanying drawings, tiOned that they li@ in the angles between and specifically set forth in the claims. l the secant. portions of this casing and the In the accompanying drawings, like chai arcuate portions thereoh'tliis being clearly acters of reference indicate like parte in the seen from an inspection of Fig. 3. several views, and 2`Figure 1 is a side ele Within the inner casing the head 13 is im-` vation of a muiiler constructed in accordance pertorate but exterior to said inner casing* i With this invention. F ig. 2 is a perspective and between this casing and the outer ,ca`s-'' 9.5v

The muliier Aembodied in this invention from Within the manier through said perfo- 10o consists of an outer casing 10 preferably oit' rations are directed longitudinallyA of the cylindrical forni and this outer casing is vmuliler. Y provided with a back head 11 having an lt will be observed that the exhaust pipe annular groove 12 in the inner tace thereof 1G opens to the interior of the inner casing.

5F adjacent the periphery. This annular ln order to provide for the escape of gases 105 groove 12 receives the end ot the enter from this inner casing and to cause said casing' 10. p gases to travel .in a tangential direction at At 13 is indicated the front head of the the instant of escape, the radial portions Q2 casing and this front head isprovided with of the inner casing are provided with a plu- 5, rality ot series of perforations Qi' arranged 110` perpendicular to planes extending radii'illy troni the axis of said casino'.

In the o )eration of the device the frases ot cape of ga yes therefrom Ato theother easing iii a' circular path,` and the other easing becoinbustion pass roin the engine through 1 the exhaust pipe 16 into the inner casing` f 'lhere these gases expand to sonie extent and pass out through, what inay be terined, the tangential pcrtorations 2T. Passing out in this way the gases are caused to rotate` around the inner casing 'and within theA outer casing. Frein the space between the two casings the gases leave the iiiuttler and pass into the atmosphere through the peroratioiis By reason oit this the rapidly rotating gases w hich lie between the two casings` are drawn slowly and unitorinly toward the front head ot the inutlicr thus coniblning n'iotion in a circular path with niotion in a rectilinear path; thus nioving in a helical path through the conibined eilects or resultant of the two inotions, ot this the ii'iuilcr iii a without the By reason escaping gases pass troni the regular and quiet nianner and production of explosive noises.

There has thus been provided a simple i and etlicicnt device of the kind described and tor the purpose speeilied.

lt is obvious that ininor changes may be made in the torni and construction ot this `invention without de lr'iarting frein thc inateiial principles thereof. lt is'not therefore forni herein shown and described, but it is ing provided with ineans te permit the escape ot gases therefrom in a path loiigitudiiially ot' said casiiigs, whereby the. escaping gases travel iii the last inentioned casing in a helical path.

3. In ay niutlier, an inner casing provided with an inlet and with unobstructed es ape passages arranged to direct the outth'iwing gases at; an acute angle to said casing, and an outer casing provided with exhaustpassages to direct the outiiowing gases in streams pa `allel to the axis of said casing.

eti In ay niultler, an inner casing, an outer casing, said inner casing having deiressions in the walls thereof provided with pertorations' arranged at right angles to planes i wall of each ot said grooves being radial with respect to the axis of said casing and desired to conliiie the invention to the exact i 1 formed wished to include all such as properly7 come within the scope oi" the appended claiins.

Having thus described the invention, what is cl'aiincd new, :Ys-

l.. A niu'tiicr comprising an outer asingf and an inner casing, one of which provided with an exhaust and the other of which is provided with an inlet for the spent gases, and with unobstructed ineans for directing said spent gases to the torincr casin g and causing said gases to travel with a t l whirling ntotion to the exhaust.

2. ln a inutller, an inner casiiig, an outer casing, one of said casingsl being provided with unobstructed ineans to perinit the cshaving a plurality of series of perforations p ei'pendicularly therethrough, and heads closing the ends of said casings, one ot said heads being provided with a centrally disposed inlet opening communicating with the inner casing, the other of said heads being provided with concentric sci-ies ot exhaust passages leading troni the space between said casings to the atinosphere, said passages being parallel to the axis of said casings.

In testimony whereof, I aliix iny signature,iii presence oi two witnesess.

HAMNER d. CORDLTU lVit-nesses M. T. MiLLnii, GEO. H. CHAN-nime.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2975854 *Aug 1, 1957Mar 21, 1961Continental Motors CorpExhaust mufflers
Cooperative ClassificationF01N1/087