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Publication numberUS879583 A
Publication typeGrant
Publication dateFeb 18, 1908
Filing dateMay 16, 1906
Priority dateMay 16, 1906
Publication numberUS 879583 A, US 879583A, US-A-879583, US879583 A, US879583A
InventorsArthur Pratt
Original AssigneeArthur Pratt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Exhaust-muffler.
US 879583 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

PATENTE) FEB. 18, 1903.

No. 879,583-I A. PRATT.

EXHAUST MUFPLER. APPLIoAgrIoN FILED MAY 1a. 1906.

2 SHEETS-SHEET 2.

Imm

WlTNEssrss )wm @ML c?. u @MQW ATTORNEYS 1o. allow the exhaust l hitherto.

30 particularly referred to.

ARTHUR PRATT, oF DUKINFIELD., ENGLAND.

ExalansT-MUFismi:R.l

To 'all whom it may concern.'

Be it known that i, ARTHUR PRATT, sub-y ject of the King of Great Britain and Ireland, and. residing at The Mount, Crescent Road,

5 Dukimield, in the-county of Chester, Eng- :land, have invented newv and useful Improvements in` Exhaust-Muiilers, of whichv A the following is a specification.

The principal object of this invention is to gas on leaving the engine under pressure, to undergo a considerable amount of expansion before it leaves the silencer whereby the sudden impact of the said exhaust as against the atmospheric 15 pressure is great y reduced, vand hence'the silencing7 is much more effective than The exact nature of invention and the manner in which the same is to be .performed or carried into practical effect will be readily understood on reference to` the sheets of drawings annexed and the following explanae tion thereof.

Figure 1.on Sheet 1 of the drawings is a longitudinal section, and' Fig. 2 on Sheet 2,

anend view of the improved exhaust silencer constructed laccording to my invention, and Figs. '3 and 4 are similar views of a modification of the same hereinafter more According to and for the purpose of my invention the bodyof the casing of the silencer is composed of two sheet iron cylinders a and b, one made to lit inside the other,

` with asheet of asbestos, or other suitable nonconducting material or compound between 'Y v them, which also serves to 'muiiie the sound of 1415 rIlhe tubes d an number of `small holes f, f and f2'and are inders a and b are fitted together 40 metal ends c with holes in the center, and through these holes at each end passes a cen`V tral tube d Aand d.` These tubes -are screwed the exhaust gas from the engine. These cylwith cast externally at each end and provided with nuts e, to fix all firmly tofgether. j

d are perforated Awith a tted two iron disks g and g to form stops, one` at'the end of the first group .of L perforationsf, and another at the end of the' 'third group. f 2. Each tube also contains. an internalspira'l or worm h, h on'e at the inlet a;

and the other at'the-outlet. These spirals fit closely into the tubes so that the exhaust gas f passing through the tubes iscompelled totakeaspiral course. 1 A 'Y Fitting closely' onthe center tube d. but so i Specification of .Letters Patent. v

Application filed May 16. 1906- Serial No. 317093.

the central tube d round t top and has a few small holes ma being left for clearance.

through the small holes in' the Patented Feb. 18, 1908.

as to slide. easily backwards and forwards thereon, are -two disks'or stops It* which are perforated with a fewsmall holes, and are rathersmaller in diameter than the inside cylinder b. These' disks are attached to the action of the springs j, j, jg thus causing the chamber to enlarge or expand.- The reaction of the springs will graduallyforce the disks hx back again as the gas passes through the small perforations above mentioned. The gas then passes throu h the holes f into of the holes f 2 into the atmosphere. i

The arrows on the drawing show the direction which the gas takes. The action of this improved silencer causes the exhaust ,to extend over a longer period than heretofore .and entirely does away `witlrthe rapid puffing sound, causing thei exhaust to be ex" tremely silent. 1

As a modification I sometimes pro ose to make the casing of the improved .si encer of a rectangular form in cross-section as shown at Figs. 3 and 4 of the drawings, and instead of the sliding disks or stops hX, at or e spiral h and out near the center of the casingI have a sheet metal flap or doorlc' which 1s hin ed' at the` v (Ie through it.. The interior .of the casing is provided with aA curve or sweepA Z having the same radius as the flap or door 7c, so that the lower end almost `touches it, a small space only 'The inlettube d entering the chamber at one end, and the outlet tube d leaving it at the other. The said tubes are perforated and fitted with internal Worms or s irals h and h as in the previously describe exhaust gas from chamber of the casing throu h the perforations f it moves the door or gap 7c upwards, thuscausingthe chamber to enlarge or expand. The gas then passes more slowly ila and its own weight'brings the hitter `back arrangement. When the or door,

the engine enters the rst f former case causes the exhaust to extend over a longer period, and thus does away with the puffing noise, which usually accoml panies the exhaust in connection with petrol, gas, and oil engines as hitherto constructed.

I claim as my invention 1. An exhaust muffler comprising an expansion chamber, inlet and exhaust ports openin into the same and a flexibly mounted ba e between. said ports, adapted to be actuated by and at all times to ermit the passage of the exhaust vapors to t e exhaust ort. p 2. A11 exhaust muffler comprising an expansion chamber, perforated inlet and exaust tubes opening into the same and a flexibly mounted member adapted to be actuated bythe exhaust vapors interposed in said chamber between the inlet' and exhaust ports.

3. An exhaust muflier comprising an expansion chamber, inlet and exhaust tubes opening into the same, an internal Worm for each of said tubes, and a flexibly mounted.

member adapted to be actuated by the exhaust vapors inter osed in said chamber between the inlet and) exhaust ports.

4. An exhaust muftler comprising an exansion chamber, perforated inlet and exliaust tubes opening into the same, a perforated exibly mounted baie interposed in said chamber between the inletand exhaust ports and adapted to be actuated by the exaust vapors.

5. An exhaust mulier comprising an explansion chamber, perforated inlet and exaust tubes opening into the same and provided respectively with an 4internal worm, a perforated flexibly-mounted baflie interposed in said chamber between the inlet and ex haust ports and adapted to be actuated by the exhaust vapors.

In testimony whereof I .have signed my name to this specification, in the presence of two subscribing witnesses.

ARTHUR PRATT.

Witnesses: Y l.

JNO. HUGHES, J. ERNEST HUGHES.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2788078 *Dec 2, 1954Apr 9, 1957Joseph ReindlExhaust muffler
US2837169 *Feb 7, 1955Jun 3, 1958Sawyer Howard CCombined engine muffler and combustion chamber
US3633343 *Jul 7, 1969Jan 11, 1972Walter J MarkAutomotive exhaust filter
US4023645 *Feb 27, 1975May 17, 1977Donaldson Company, Inc.Method and apparatus for reducing aerodynamic whistle
US4305477 *Dec 20, 1979Dec 15, 1981Deere & CompanyExhaust tuning means for internal combustion engines
US5058704 *Nov 21, 1988Oct 22, 1991Yu Chuen HuanTurbo jet muffler
US6622819 *Oct 15, 2001Sep 23, 2003Steven M. ReynoldsSound attenuator for pneumatic exhaust
US7644804 *Oct 25, 2007Jan 12, 2010Pax Streamline, Inc.Sound attenuator
US7673834Jul 2, 2004Mar 9, 2010Pax Streamline, Inc.Vortex ring generator
US7766279Oct 29, 2007Aug 3, 2010NewPax, Inc.Vortex ring generator
US7802583Dec 29, 2005Sep 28, 2010New Pax, Inc.Fluid flow control device
US7814967Jul 7, 2007Oct 19, 2010New Pax, Inc.Heat exchanger
US7832984Aug 5, 2008Nov 16, 2010Caitin, Inc.Housing for a centrifugal fan, pump, or turbine
US7862302May 4, 2006Jan 4, 2011Pax Scientific, Inc.Fluid circulation system
US7934686Aug 2, 2010May 3, 2011Caitin, Inc.Reducing drag on a mobile body
US7980271Jun 30, 2004Jul 19, 2011Caitin, Inc.Fluid flow controller
US8328522Sep 28, 2007Dec 11, 2012Pax Scientific, Inc.Axial flow fan
US8381870Jul 18, 2011Feb 26, 2013Pax Scientific, Inc.Fluid flow controller
US8631827Aug 24, 2010Jan 21, 2014Pax Scientific, Inc.Fluid flow control device
US8733497Feb 26, 2013May 27, 2014Pax Scientific, Inc.Fluid flow controller
US20040244853 *Jun 30, 2004Dec 9, 2004Harman Jayden DavidFluid flow controller
US20050269458 *Jul 2, 2004Dec 8, 2005Harman Jayden DVortex ring generator
US20050279572 *Jun 15, 2005Dec 22, 2005Lars BirgerssonArrangement for internal combustion engine
US20060102239 *Dec 29, 2005May 18, 2006Pax Scientific, Inc.Fluid flow control device
US20060260869 *May 18, 2005Nov 23, 2006Kim Jay SMuffler having fluid swirling vanes
US20060263201 *May 4, 2006Nov 23, 2006Harman Jayden DFluid circulation system
US20080041474 *Oct 25, 2007Feb 21, 2008Harman Jayden DFluid Flow Controller
US20080145230 *Sep 28, 2007Jun 19, 2008Pax Scientific, Inc.Axial flow fan
US20080265101 *Oct 29, 2007Oct 30, 2008Pax Scientific, Inc.Vortex ring generator
US20080308346 *Aug 8, 2008Dec 18, 2008Kim Jay SMuffler having fluid swirling vanes
US20090035132 *Aug 5, 2008Feb 5, 2009Pax Streamline, Inc.Housing for a centrifugal fan, pump, or turbine
US20090308472 *Jun 15, 2009Dec 17, 2009Jayden David HarmanSwirl Inducer
US20100282538 *Apr 27, 2010Nov 11, 2010Kim Jay SMuffler having fluid swirling vanes
US20110011463 *Aug 2, 2010Jan 20, 2011Jayden David HarmanReducing drag on a mobile body
EP1475520A1 *Apr 2, 2004Nov 10, 2004Grupo de Aplicaciones y Mantenimiento Ecologico, S.L.Improved acoustic silencer
Classifications
Cooperative ClassificationY10S55/30, F01N1/08