US3092206A - Internal combustion engine silencers - Google Patents

Internal combustion engine silencers Download PDF

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US3092206A
US3092206A US860938A US86093859A US3092206A US 3092206 A US3092206 A US 3092206A US 860938 A US860938 A US 860938A US 86093859 A US86093859 A US 86093859A US 3092206 A US3092206 A US 3092206A
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baffles
casing
silencer
internal combustion
exhaust gases
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US860938A
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Moreau Rene
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/083—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using transversal baffles defining a tortuous path for the gases or successively throttling gas flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/26—Multi-layered walls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/30—Exhaust treatment

Definitions

  • the present invention provides a silencer of novel internal construction 'and highly efficient action.
  • the silencer according to the invention comprises a casing, a plur-ality of double-walled baffies and means for fixing the bafiles in position within -the oasing, the oasing being 'thus divided into a p'lurality of intercommunicating compartments by means of the batfies, 'the bafiles being staggered so that exhaust gases from the engine must follow a sinuous course, and each of the bafi'les being constituted from a plane perforate wall and a plane imperforate wall, such walls being separated by a short distance, whereby a chamber is formed between them into which the exhaust gases may expand.
  • the perforations in the baffle ⁇ are conveniently of circular shape and about 2 to 3 mm. in diameter. Owing 'to 'the perforated wall of the segmentary member on which the exhaust gases impinge, a characteristics reduction in noise is obtained 'as a consequence of a known physical effect and a silencer is thus given which is much more effective than known silencers.
  • the 'bafiies are fixed in position perpendicular to the longitudinal axis of the casing.
  • the fixing means can conveniently comprise spacing rings between the baffles, 'and longitudinal rods passing through holes in the baffles.
  • the baflles are fiJ-(d in position at an oblique angle to the longitudinal 'axis of the casing.
  • the fixing means can in this embodiment con'sist of a lining member inserted within the casing and being provided with pai-rs of grooves which engage with the bafiles.
  • the casing and lining can thus be two pipes of sufficient-ly differing 'diameters as to allow one pipe, which bears pairs of grooves on its linner surface, 'to slide within -the other pipe.
  • the :two pipes may be held together by two cap members, one at each end of the silencer, which members, also car-ry the inlet and outlet pipes for -the exhaust gases.
  • This second embodiment is a very effective silencer, and substantially reduces any excess internal pressure.
  • the preferred fixing method is easy lto assemble and 'the lining member increases the rigidity of the silencer.
  • FIG. 1 shows 'a longitudinal section of a first embodiment of 'the invention
  • FIG. 2 is a -transverse sectional view of the silencer taken along section line 2-2 of FIG. l, as seen from the left hand end of FIG. 1;
  • FIG. 3 is a transverse section of the casing
  • FIG. 4 is a perspective view of one of 'the doublewalled 'balfie's
  • FIGS. 5 'and 6 show, respectively, the plane and perfora-te walls of a bafile, and FIG. 7 -is a Vertical sectiona'l view of the perforate wall taken along the line 7-7 of FIG. 6;
  • FIG. 8 shows a spacing ring in Vertical cross-section, ⁇ as it would appear along the line 8-8 of FIG. 2;
  • FIGS. 9 and 10 show, in longitudinal cross-section, the pipes connecting, respectively, the silencer with the engine and with the atmosphere;
  • FIG. 11 l is an end elevational view of the pipe shown in FIG. 10;
  • FIG. 12 is a longitudinal sectional view of a second embodiment of lthe silencer, also showing the cap members;
  • FIG. 13 is a longitudinal cross-section of the inner pipe alone of FIG. 12.
  • FIG. 14 is ya transverse section through the two inner pipes of FIG.y 12 as -assembled
  • the silencer shown in FIGS. l-ll consists of la casing 4 (FIGS. 1-3) within which are arranged at intervals double-walled bafiles, which are spaced apart by means of spacing rings 5 (FIGS. 1, 2 vand 8) and are held in position by 'two longitudinal rods 9, one of which is seen in FIG. 1, which pass through holes in -the bafiles.
  • the baffles are staggered so 'as to cause the exhaust gases 'from
  • each of 'the doublewalled baffles consists of a plane wall 7 and a wall 3 perforated by 'a number of 'small holes 6, the two walls being joined by a part-annular segment 8. Holes are provided in the walls for vthe passage of the rods 9.
  • the g-ases fina-lly escape in the direction of the arrow 11 in FIG. 10 to the atmosphere through the exhaust pipe 16 mounted on the 'silencer by means of the cap member 15.
  • the inner pipe 18 is provided with pairs of grooves 20 located in staggered relationship into which
  • the inner pipe 18 is concentrically surrounded by the outer casing pipe 4 .and it will be seen from FIG. 12 that the walls yof :the baflles are mounted in the pa'i'rs of ⁇ grooves 20 and 'that each pair contains a perforated wall 6 and an imperforate wall 7. Each pair of adjacent wall elements 6 and 7 cooperate to form a double-walled batfie. These double-walled bafilles are staggered 'so that the exhaust gases are caused to take the path shown by 'the arrows 10 in FIG. 12.
  • cap members 24 and 25 which are provided respec- 'tively with an exhaust gas inlet pipe 21 and an exhaust gas Outlet pipe 22.
  • the oblique disposition of the baffles in the p-referred embodiment can be provided by any other device, located inside the silencer, which is equivalent to the inner pipe provided with grooves. Any suitable thermal and acoustic insulating material can be inserted between the inner pipe and the outer pipe by 'adapting their di-ameters accordingly.
  • a silencer for internal combustion engines comprisi 3 ing a casing, a plurality of double-walled baffles, 'and means for fixing the bafies in position within the casing, the casing being 'thus divided into a plurali'ty of interoommunicating .comp'artments by means of 'the bafiles, the bafes being staggered so that exhaust gases from the engine must follow a sinuous course, 'and each of the baffies being constituted from a plane perforate wall and a plane imperforate wall, such walls being separated by a short distance whereby a chamber is formed between them into which lthe exhaust gases may expand.
  • a silencer for internal combustion engines comp'rising a casting, arplurality of double-walled baflles, 'and means for fixing the baffles in position perpendicular to the -longitudinal axis of the casing, the casing being thus divided into a plurality of intercommunicating compar'tments by means of lthe b'affles, the baffles being staggered so that exhaust gases from the engine must follow va sinuous course, and each of the baflles being eonstituted from a plane perforate wall and a plane imperforate wall, such walls being separated by a short distance whereby a Chamber is formed between them into which the exhaust gases may expand.
  • a -silencer for internal combustion engines comprising a casing, a plurality of double-walled baflles, and means for fixing lthe baffles in position at an oblique angle to the longitudinal a'Xis of the ⁇ casing, the ⁇ oasing being thus divided into a plurality of intercommunieating com- 'partments by means of the bafiles, the bafiies being Staggered so that exhaust gases from the engine must follow a 'sinuous course, and each of the bafies being oonstituted from a plane perforate wall and a plane imperforate wall,
  • the means for fixing the bafiles in position within the oasing includes spacing rings located between suc'cessive pairs of btafiies and longitudinal rods passing ythrough holes in the bafiies.
  • the means for fixing t'he baffles in position within the casing consists of a lining member inserted within the casing, the lining member being provided with pairs of grooves engaging with the ⁇ periphera'l portions of the respective baffles.
  • a silencer according to claim 5 which also comprises la oap member at ea'ch end for connection of the silencer to a gas inlet pipe and a gas outlet pipe, the eap members serving to secure the lining member to the c-asing.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Description

R. MOREAU INTERNAL COMBUSTVION ENGINE SILENCERS June 4, 1963 2 Sheets-Sheet 1 Filed Dec. 21, 1959 mu W A N MM W Vod. W MMW A 5 ma .wo F
2 7 lm HM w ,w F
June 4, 1963 R. MoRl-:Au
INTERNAL COMBUSTION ENGINE SILENCERS 2 Sheets-Sheet 2 Filed Dec. 21, 1959 /A/vEA/To REA/E MoREA U United States Patent 3,092.,206 INTERNAL COMBUSTION ENGINE SILENCERS Rene Moreau, 81` Ave. Armand Huysmans, Brussels, Belgium Filed Dec. 2.1, 1959, Ser. No. 860,938 Claims priority, application Belgium Dec. 29, 1958 6 Claims. (Cl. 181-68) -The present invention rel-ates to silencers for internal combustion engines.
It is an object of this -invention to provide a silencer which -is superior to 'that of known silencers.
The present invention provides a silencer of novel internal construction 'and highly efficient action.
The silencer according to the invention comprises a casing, a plur-ality of double-walled baffies and means for fixing the bafiles in position within -the oasing, the oasing being 'thus divided into a p'lurality of intercommunicating compartments by means of the batfies, 'the bafiles being staggered so that exhaust gases from the engine must follow a sinuous course, and each of the bafi'les being constituted from a plane perforate wall and a plane imperforate wall, such walls being separated by a short distance, whereby a chamber is formed between them into which the exhaust gases may expand.
The perforations in the baffle `are conveniently of circular shape and about 2 to 3 mm. in diameter. Owing 'to 'the perforated wall of the segmentary member on which the exhaust gases impinge, a characteristics reduction in noise is obtained 'as a consequence of a known physical effect and a silencer is thus given which is much more effective than known silencers.
In one embodiment of the -invention, the 'bafiies are fixed in position perpendicular to the longitudinal axis of the casing. In this embodiment, the fixing means can conveniently comprise spacing rings between the baffles, 'and longitudinal rods passing through holes in the baffles.
In another, preferred, embodiment, the baflles are fiJ-(d in position at an oblique angle to the longitudinal 'axis of the casing. The fixing means can in this embodiment con'sist of a lining member inserted within the casing and being provided with pai-rs of grooves which engage with the bafiles. The casing and lining can thus be two pipes of sufficient-ly differing 'diameters as to allow one pipe, which bears pairs of grooves on its linner surface, 'to slide within -the other pipe. The :two pipes may be held together by two cap members, one at each end of the silencer, which members, also car-ry the inlet and outlet pipes for -the exhaust gases.
This second embodiment is a very effective silencer, and substantially reduces any excess internal pressure. The preferred fixing method is easy lto assemble and 'the lining member increases the rigidity of the silencer.
Other characteristics of the invention, which are only given by way of example, will appear from the follow- .ing description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 shows 'a longitudinal section of a first embodiment of 'the invention;
FIG. 2 is a -transverse sectional view of the silencer taken along section line 2-2 of FIG. l, as seen from the left hand end of FIG. 1;
FIG. 3 is a transverse section of the casing;
FIG. 4 is a perspective view of one of 'the doublewalled 'balfie's;
FIGS. 5 'and 6 show, respectively, the plane and perfora-te walls of a bafile, and FIG. 7 -is a Vertical sectiona'l view of the perforate wall taken along the line 7-7 of FIG. 6;
3,092,20 Patented .l'uineV 4, 1 963 "ice FIG. 8 shows a spacing ring in Vertical cross-section, `as it would appear along the line 8-8 of FIG. 2;
FIGS. 9 and 10 show, in longitudinal cross-section, the pipes connecting, respectively, the silencer with the engine and with the atmosphere;
FIG. 11 lis an end elevational view of the pipe shown in FIG. 10;
FIG. 12 is a longitudinal sectional view of a second embodiment of lthe silencer, also showing the cap members;
FIG. 13 is a longitudinal cross-section of the inner pipe alone of FIG. 12; and
FIG. 14 is ya transverse section through the two inner pipes of FIG.y 12 as -assembled The silencer shown in FIGS. l-ll consists of la casing 4 (FIGS. 1-3) within which are arranged at intervals double-walled bafiles, which are spaced apart by means of spacing rings 5 (FIGS. 1, 2 vand 8) and are held in position by 'two longitudinal rods 9, one of which is seen in FIG. 1, which pass through holes in -the bafiles. As is seen from FIG. l, the baffles are staggered so 'as to cause the exhaust gases 'from |the engine to 'take the path shown by the arrows 10.
It will be seen from FIGS. 4-8 that each of 'the doublewalled baffles consists of a plane wall 7 and a wall 3 perforated by 'a number of 'small holes 6, the two walls being joined by a part-annular segment 8. Holes are provided in the walls for vthe passage of the rods 9.
The exhaust gases from the engine enter the pipe 12, which is connected to the engine by the cap member 13 and to the silencer 4 by Ithe cap member 14, travel in the d'irection of 'the arrow 11 in FIG. 9, 'and enter the silencer, where they -impinge successively against the perfora-ted walls 3, =thus lessening the noise. The g-ases fina-lly escape in the direction of the arrow 11 in FIG. 10 to the atmosphere through the exhaust pipe 16 mounted on the 'silencer by means of the cap member 15.
According =to the preferred embodiment shown in FIGS. 12 to 14, the inner pipe 18 is provided with pairs of grooves 20 located in staggered relationship into which |the associated perforated walls 3 'and imperforate walls 7 are mounted and fiXed obliquely.
The inner pipe 18 is concentrically surrounded by the outer casing pipe 4 .and it will be seen from FIG. 12 that the walls yof :the baflles are mounted in the pa'i'rs of `grooves 20 and 'that each pair contains a perforated wall 6 and an imperforate wall 7. Each pair of adjacent wall elements 6 and 7 cooperate to form a double-walled batfie. These double-walled bafilles are staggered 'so that the exhaust gases are caused to take the path shown by 'the arrows 10 in FIG. 12.
The two concentric pipes are maintained in position by cap members 24 and 25 which are provided respec- 'tively with an exhaust gas inlet pipe 21 and an exhaust gas Outlet pipe 22.
This inclined 'arrangement of the lbaffles in the preferre'd embodiment considerably faoilitates dis'charge of the ex'haust gases and reduces any excess pressure inside the device. The provision of the inner pipe 18 and vthe cap members 24 and 25 considerably facilitate zassembly of the device and increase its rigidity.
It should be mentioned that, without exceeding the scope of -the present inven-tion, :the oblique disposition of the baffles in the p-referred embodiment can be provided by any other device, located inside the silencer, which is equivalent to the inner pipe provided with grooves. Any suitable thermal and acoustic insulating material can be inserted between the inner pipe and the outer pipe by 'adapting their di-ameters accordingly.
I claim:
1. A silencer for internal combustion engines, comprisi 3 ing a casing, a plurality of double-walled baffles, 'and means for fixing the bafies in position within the casing, the casing being 'thus divided into a plurali'ty of interoommunicating .comp'artments by means of 'the bafiles, the bafes being staggered so that exhaust gases from the engine must follow a sinuous course, 'and each of the baffies being constituted from a plane perforate wall and a plane imperforate wall, such walls being separated by a short distance whereby a chamber is formed between them into which lthe exhaust gases may expand.
2. A silencer for internal combustion engines, comp'rising a casting, arplurality of double-walled baflles, 'and means for fixing the baffles in position perpendicular to the -longitudinal axis of the casing, the casing being thus divided into a plurality of intercommunicating compar'tments by means of lthe b'affles, the baffles being staggered so that exhaust gases from the engine must follow va sinuous course, and each of the baflles being eonstituted from a plane perforate wall and a plane imperforate wall, such walls being separated by a short distance whereby a Chamber is formed between them into which the exhaust gases may expand.
3. A -silencer for internal combustion engines, comprising a casing, a plurality of double-walled baflles, and means for fixing lthe baffles in position at an oblique angle to the longitudinal a'Xis of the `casing, the `oasing being thus divided into a plurality of intercommunieating com- 'partments by means of the bafiles, the bafiies being Staggered so that exhaust gases from the engine must follow a 'sinuous course, and each of the bafies being oonstituted from a plane perforate wall and a plane imperforate wall,
such walls being separated by a short distance whereby a Chamber is formed between them into which the exhaust gases may exp'and.
4. The silencer of claim 2, wherein the means for fixing the bafiles in position within the oasing includes spacing rings located between suc'cessive pairs of btafiies and longitudinal rods passing ythrough holes in the bafiies.
5. The silencer of claim 3. wherein 'the means for fixing t'he baffles in position within the casing consists of a lining member inserted within the casing, the lining member being provided with pairs of grooves engaging with the `periphera'l portions of the respective baffles.
6. A silencer according to claim 5, which also comprises la oap member at ea'ch end for connection of the silencer to a gas inlet pipe and a gas outlet pipe, the eap members serving to secure the lining member to the c-asing.
References Cited in the file of this patent UNITED STATES PATENTS v1,030347 Swearingen June 25, 1912 1,0`66,341 Thomson July 1, 1913 1,983,304 Olsen Dec. 4, 1934 1,998,386 Powell Apr. 16, 1935 2,541,373 McLeod Feb. 13, 1951 2,896,743 Bradshaw July 28, 1959 p FOREIGN PATENTS 470,904 Italy Apr. 29, 1952 1,126,701 France July 30, 1956

Claims (1)

1. A SILENCER FOR INTERNAL COMBUSTION ENGINES, COMPRISING A CASING, A PLURALITY OF DOUBLE-WALLED BAFFLES, AND MEANS FOR FIXING THE BAFFLES IN POSITION WITHIN THE CASING, THE CASING BEING THUS DIVIDED INTO A PLURALITY OF INTERCOMMUNICATING COMPARTMENTS BY MEANS OF THE BAFFLES, THE BAFFLES BEING STAGGERED SO THAT EXHAUST GASES FROM THE ENGINE MUST FOLLOW SINUOUS COURSE, AND EACH OF THE BAFFLES BEING CONSTITUTED FROM A PLANE PERFORATE WALL AND A PLANE IMPERFORATE WALL, SUCH WALLS BEING SEPARATED BY A SHORT DISTANCE WHEREBY A CHAMBER IS FORMED BETWEEN THEM INTO WHICH THE EXHAUST GASES MAY EXPAND.
US860938A 1958-12-29 1959-12-21 Internal combustion engine silencers Expired - Lifetime US3092206A (en)

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Cited By (31)

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US4042355A (en) * 1974-10-15 1977-08-16 Pearson Paul W Pollution control device
US4507917A (en) * 1980-09-17 1985-04-02 Tecumseh Products Company Economical engine construction having integrally cast muffler
WO1985002785A1 (en) * 1983-12-27 1985-07-04 Ford Motor Company Limited Regenerative filter trap system with apparatus for diverting the exhaust gas flow
US4777796A (en) * 1987-03-09 1988-10-18 Teledyne Industries, Inc. Heat recovery muffler system
US4786299A (en) * 1986-05-30 1988-11-22 Demarco Thomas E Vacuum loader with silencer base
US4923033A (en) * 1987-04-22 1990-05-08 Webasto Ag Fahrzeugtechnik Heating device, particularly automotive heating device, with an integrated muffler
US5000768A (en) * 1990-02-01 1991-03-19 Hwang Feng Lin Filtering and absorbing device for vehicle discharge pipe
US5137433A (en) * 1990-05-29 1992-08-11 Willinger Bros., Inc. Aquarium power head with integral muffler
US5894115A (en) * 1997-12-02 1999-04-13 Harborville Corporation Exhaust system apparatus and noise suppression method
US6152258A (en) * 1999-09-28 2000-11-28 Brunswick Corporation Exhaust system with silencing and water separation capability
US6364054B1 (en) 2000-01-27 2002-04-02 Midas International Corporation High performance muffler
US20030072459A1 (en) * 2001-09-27 2003-04-17 Roderic Cole Induction system with low pass filter for turbo charger applications
US6569217B1 (en) 2000-05-10 2003-05-27 Thomas M. DeMarco Industrial dust collector with multiple filter compartments
US20050274094A1 (en) * 2003-03-17 2005-12-15 Demarco Thomas M Vacuum loader
US20060207230A1 (en) * 2003-03-17 2006-09-21 Demarco Maxvac Corporation Vacuum loader with filter doors
WO2007108686A1 (en) * 2006-03-22 2007-09-27 Aluheat B.V. Sound reduction provision for heat apparatuses
US20090127025A1 (en) * 2007-11-19 2009-05-21 Grant Robert Rimback Triangular cross section exhaust muffler
US20090277714A1 (en) * 2008-05-09 2009-11-12 Siemens Power Generations, Inc. Gas turbine exhaust sound suppressor and associated methods
US20110286167A1 (en) * 2010-05-21 2011-11-24 Novomatic Ag Cooling air cleaner of an electronic device
US8307943B2 (en) * 2010-07-29 2012-11-13 General Electric Company High pressure drop muffling system
US8430202B1 (en) 2011-12-28 2013-04-30 General Electric Company Compact high-pressure exhaust muffling devices
US8511096B1 (en) 2012-04-17 2013-08-20 General Electric Company High bleed flow muffling system
US8550208B1 (en) 2012-04-23 2013-10-08 General Electric Company High pressure muffling devices
US20130286770A1 (en) * 2012-04-25 2013-10-31 Umicore Ag & Co. Kg Static gas mixer
DE102006017154B4 (en) * 2005-04-15 2014-09-11 Halla Visteon Climate Control Corporation 95 Air intake system
US20140311823A1 (en) * 2013-04-17 2014-10-23 GM Global Technology Operations LLC Acoustic insulator having a tortuous path
US9399951B2 (en) 2012-04-17 2016-07-26 General Electric Company Modular louver system
US20170044943A1 (en) * 2012-02-07 2017-02-16 Black Widow Performance, Inc. Muffler for automobile
US9587536B2 (en) 2015-04-27 2017-03-07 Charles C. Belt Exhaust muffler
US10403256B2 (en) * 2014-10-31 2019-09-03 Umfotec Gmbh Resonator with ring-shaped chamber between an inner tube and an outer wall and with a dividing rib extending from the inner tube toward the outer wall
USRE47932E1 (en) * 2013-06-24 2020-04-07 Smith & Wesson Inc. Sound suppressor

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FR2484339B1 (en) * 1980-06-17 1986-10-10 Moulin Claude PRIMARY OR SECONDARY EXHAUST PIPE (MUFFLER)
GB0820598D0 (en) 2008-11-11 2008-12-17 Rolls Royce Plc A noise reduction device

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US1030347A (en) * 1912-01-27 1912-06-25 Zachariah Swearingen Exhaust-silencer.
US1066341A (en) * 1912-12-30 1913-07-01 Gen Electric Muffler.
US1983304A (en) * 1929-07-24 1934-12-04 Chicago Pneumatic Tool Co Muffler
US1998386A (en) * 1933-03-08 1935-04-16 Herbert S Powell Muffler for internal combustion engines
US2541373A (en) * 1946-05-03 1951-02-13 William B Mcleod Muffler with inclined partitions
FR1126701A (en) * 1955-06-25 1956-11-29 Silencers for explosion engines
US2896743A (en) * 1956-03-26 1959-07-28 Bradshaw & Company Apparatus for separating liquid from gases

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1030347A (en) * 1912-01-27 1912-06-25 Zachariah Swearingen Exhaust-silencer.
US1066341A (en) * 1912-12-30 1913-07-01 Gen Electric Muffler.
US1983304A (en) * 1929-07-24 1934-12-04 Chicago Pneumatic Tool Co Muffler
US1998386A (en) * 1933-03-08 1935-04-16 Herbert S Powell Muffler for internal combustion engines
US2541373A (en) * 1946-05-03 1951-02-13 William B Mcleod Muffler with inclined partitions
FR1126701A (en) * 1955-06-25 1956-11-29 Silencers for explosion engines
US2896743A (en) * 1956-03-26 1959-07-28 Bradshaw & Company Apparatus for separating liquid from gases

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042355A (en) * 1974-10-15 1977-08-16 Pearson Paul W Pollution control device
US4507917A (en) * 1980-09-17 1985-04-02 Tecumseh Products Company Economical engine construction having integrally cast muffler
WO1985002785A1 (en) * 1983-12-27 1985-07-04 Ford Motor Company Limited Regenerative filter trap system with apparatus for diverting the exhaust gas flow
US4786299A (en) * 1986-05-30 1988-11-22 Demarco Thomas E Vacuum loader with silencer base
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Publication number Publication date
FR1245851A (en) 1960-11-10
GB890364A (en) 1962-02-28

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