US3521429A - Muffler - Google Patents

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US3521429A
US3521429A US765264A US3521429DA US3521429A US 3521429 A US3521429 A US 3521429A US 765264 A US765264 A US 765264A US 3521429D A US3521429D A US 3521429DA US 3521429 A US3521429 A US 3521429A
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tube
packing
muffler
exhaust
mufller
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US765264A
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Frank B Leffler
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FRANK B LEFFLER
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FRANK B LEFFLER
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0226Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being fibrous
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2230/00Combination of silencers and other devices
    • F01N2230/02Exhaust filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00Structure of catalyst support or particle filter
    • F01N2330/10Fibrous material, e.g. mineral or metallic wool
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00Structure of catalyst support or particle filter
    • F01N2330/10Fibrous material, e.g. mineral or metallic wool
    • F01N2330/101Fibrous material, e.g. mineral or metallic wool using binders, e.g. to form a permeable mat, paper or the like
    • F01N2330/102Fibrous material, e.g. mineral or metallic wool using binders, e.g. to form a permeable mat, paper or the like fibrous material being fiber reinforced polymer made of plastic matrix reinforced by fine glass or in the form of a loose mass of filaments or fibers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2370/00Selection of materials for exhaust purification
    • F01N2370/22Selection of materials for exhaust purification used in non-catalytic purification apparatus
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Definitions

  • This invention relates to a new and improved mufller to be used in the combustion exhaust systems commonly found in automobile engines, truck Diesel engines, or the like.
  • Another object of this invention is to provide a high capacity effective filtering means for removal of solid particulate matter from exhaust gas.
  • Another object of this invention is to provide means for converting gaseous pollutants to harmless products prior to their ejection into the surrounding atmosphere.
  • Another object of this invention is to provide a mufller of long life wherein the internal packing is replaceable thereby restoring performance of said mufller to its initial high value.
  • Another object of this invention is to provide muflier packing material of a fibrous nature, said material having improved noise attenuation, particulate filtering and gase ous conversion properties wherein said fibrous material is coated with an oil-like substance.
  • FIG. 1 is a perspective view of a specific embodiment of the mufller comprising the subject matter of the instant invention
  • FIG. 2 is a sectional transverse view taken substantially along the line 2-2 of FIG. 1, and illustrates a particular arrangement of packing materials wherein such materials are alternately spaced in a flattened cylindrical type arrangement.
  • FIG. 3 is a vertical sectional view taken along the longitudinal axis of line 33 of FIG. 2, and illustrates the muffler volume with a substantially filled packing material contained therein, and
  • FIG. 4 is a fragmentary sectional view and illustrates a clamping arrangement for detachably securing a split muffler housing.
  • the mufiler comprises an imperforate tube housing 12, a pair of end plates 13, each of which is suitably secured at one end of said tube 12 thereby enclosing said tube -12 from the external at mosphere, an inlet conduit 14 secured to one end plate, and outlet conduit 16 secured to the other end plate 13 thereby providing means for attachment into the automobile exhaust system.
  • Imperforate tube 12 is constructed of conventional materials capable of resisting the corroding effects of water condensate and other corrosive agents present in exhaust gases.
  • Galvanized steel, aluminized steel, aluminum, ceramic or glass-lined metal tubes, are examples of such materials, which may be used.
  • the shape of said tube 12 may be cylindrical, flattened cylindrical having an elliptical type cross-section, or any other suitable shape.
  • a porous packing material preferably of fibrous glass 20 and steel wool 22 is contained within said tube 12 substantially filling the entire internal volume thereof.
  • Suitably confining screens may be provided at the inlet 14 and outlet 16 to prevent loss of said packing materials 20, 22 into the exhaust system.
  • a preferred packing arrangement is shown in FIGS. 2 and 3 and consists of filling the internal volume with alternate layers of glass fiber and steel wool mats, each layer being approximately A-inch thick, and the layers being tubular sleeves concentrically arranged about the longitudinal axis of tube 12 extending the length thereof.
  • other methods of layering may be used, as for example, flat sheets laid one upon the other, or spiraled coincident with the axis of said tube 12.
  • glass fibers 20 and steel fibers 22 are thereby provided.
  • the packing materials are commercially available in a variety of forms such as belts, mats, wool, or the like. Irregularly-shaped metallic chips may also be used in place of the matted fiber structure. Other combinations of materials may be used including fibrous asbestos, quartz, alumina, copper, aluminum, stainless steel, or the like.
  • a preferred treatment of said material includes applying a synthetic oillike fluid to the packing material surfaces, thereby coating the surfaces as by impregnation, spraying, or dipping.
  • Impregnating fluids for use in this invention must be of low volatility and capable of withstanding temperatures of up to 600 F. in the presence of oxygen for prolonged periods of time without decomposition.
  • Commercially available synthetic lubricants are obtainable for such use.
  • a variety of silicone fluids having the necessary high temperature properties are suitable.
  • dimethyl and methylphenyl polysiloxane fluids available from Dow Corning Corporation and designated as 210 and 710 series, respectively, have been used.
  • Preferred fluids are designated as 210, 210H, 710G and 710R.
  • the mufller inlet conduit 14 may be of a flexible type with gradually increasing diameter away from the mufiier such that it is easily connectible to the engine exhaust pipe, located upstream of said muffier.
  • Exhaust gases emanating from the internal combustion engine are conducted through conduit 14 into mufiler 10 where expansion occurs and where said gases intimately and uniformly contact and pass through the porous packing at a reduced velocity and emerge via conduit 16 into an exhaust tailpipe and are subsequently discharged into the atmosphere. Pollutants normally found in the exhaust gases are thereby filtered and/r converted to harmless products.
  • removal of the solid particles is by physical entrapment. Removal of the undesirable gaseous pollutants is by conversion of said pollutants to a chemical state considered to be non-contributing to atmospheric pollution, probably by a combination of temperature, and catalytic reaction.
  • the tube 12 is constructed of two halves joined, after the packing material has been inserted, by a light weld or soldered seam 18.
  • a reinforcing ring 19 may be internally Welded or tacked on the inner surface of one of said tube halves, thereby providing reinforcement and guiding means for joining both halves.
  • tube 12 may be constructed in such manner as depicted in FIG. 4 wherein each half of tube 12 is provided with continuous flange members 24 adjacently separated by sealing gasket 26 and held firmly in place by a circumferential removable clamp device 28. This construction facilitates removal and replacement of packing materials 20 and 22.
  • An exhaust mufiler and filter comprising, an imperforate tube, end plates secured to said tube having inlet and outlet means disposed axially of the tube for directing the passage of high temperature exhaust gases therethrough, and a porous packing and filtering material substantially filling the internal volume of said tube between said end plates and across the tube, said packing and filtering material including a plurality of flat layers of fibrous glass and metallic fibers of substantially equal volume laid alternately on one another and rolled about an axis coincident with the axis of said tube to define coaxial tubular sleeves parallel to the direction of flow of the exhaust gases, each of said layers being completely impregnated with a silicone oil capable of withstanding normal muffler exhaust gas temperatures.

Description

July 21, 1970 F. a. LEFFLER MUFFLER Filed 061;. 4. 1968 INVENTOR.
United States Patent 3,521,429 MUFFLER Frank B. Lefller, Paris, Tenn. (Box 28, Hazel, Ky. 42049) Filed Oct. 4, 1968, Ser. No. 765,264 Int. Cl. B01d 46/00; F02b 75/10; F01n 3/02 U.S. Cl. 55276 4 Claims ABSTRACT OF THE DISCLOSURE An improved exhaust muffler packed with fibrous material in roll form of fibrous glass and metal layers impregnated with a silicone oil capable of withstanding exhaust gas temperature.
This invention relates to a new and improved mufller to be used in the combustion exhaust systems commonly found in automobile engines, truck Diesel engines, or the like.
It is a primary object of this invention to provide a mufller which is economical in construction, inexpensive in use, and effective in reducing the noise level of combustion exhaust gases.
Another object of this invention is to provide a high capacity effective filtering means for removal of solid particulate matter from exhaust gas.
Another object of this invention is to provide means for converting gaseous pollutants to harmless products prior to their ejection into the surrounding atmosphere.
Another object of this invention is to provide a mufller of long life wherein the internal packing is replaceable thereby restoring performance of said mufller to its initial high value.
Another object of this invention is to provide muflier packing material of a fibrous nature, said material having improved noise attenuation, particulate filtering and gase ous conversion properties wherein said fibrous material is coated with an oil-like substance.
Other objects and advantages of this invention will be made readily apparent from the disclosure in the attached specification and from the accompanying drawing, wherein:
FIG. 1 is a perspective view of a specific embodiment of the mufller comprising the subject matter of the instant invention;
FIG. 2 is a sectional transverse view taken substantially along the line 2-2 of FIG. 1, and illustrates a particular arrangement of packing materials wherein such materials are alternately spaced in a flattened cylindrical type arrangement.
FIG. 3 is a vertical sectional view taken along the longitudinal axis of line 33 of FIG. 2, and illustrates the muffler volume with a substantially filled packing material contained therein, and
FIG. 4 is a fragmentary sectional view and illustrates a clamping arrangement for detachably securing a split muffler housing.
Referring now to the drawing, wherein like numerals indicate like elements throughout the several views, the specific embodiment of said improved mufller is generally indicated by the numeral 10. The mufiler comprises an imperforate tube housing 12, a pair of end plates 13, each of which is suitably secured at one end of said tube 12 thereby enclosing said tube -12 from the external at mosphere, an inlet conduit 14 secured to one end plate, and outlet conduit 16 secured to the other end plate 13 thereby providing means for attachment into the automobile exhaust system.
Imperforate tube 12, as shown in FIG. 1, is constructed of conventional materials capable of resisting the corroding effects of water condensate and other corrosive agents present in exhaust gases. Galvanized steel, aluminized steel, aluminum, ceramic or glass-lined metal tubes, are examples of such materials, which may be used. The shape of said tube 12 may be cylindrical, flattened cylindrical having an elliptical type cross-section, or any other suitable shape.
A porous packing material preferably of fibrous glass 20 and steel wool 22 is contained within said tube 12 substantially filling the entire internal volume thereof. Suitably confining screens, not shown, may be provided at the inlet 14 and outlet 16 to prevent loss of said packing materials 20, 22 into the exhaust system. A preferred packing arrangement is shown in FIGS. 2 and 3 and consists of filling the internal volume with alternate layers of glass fiber and steel wool mats, each layer being approximately A-inch thick, and the layers being tubular sleeves concentrically arranged about the longitudinal axis of tube 12 extending the length thereof. Alternatively, other methods of layering may be used, as for example, flat sheets laid one upon the other, or spiraled coincident with the axis of said tube 12.
As can readily be appreciated, approximately equal volumes of glass fibers 20 and steel fibers 22 are thereby provided. The packing materials are commercially available in a variety of forms such as belts, mats, wool, or the like. Irregularly-shaped metallic chips may also be used in place of the matted fiber structure. Other combinations of materials may be used including fibrous asbestos, quartz, alumina, copper, aluminum, stainless steel, or the like.
Filling the entire muffler sleeve 12 with porous packing material offers high capacity for particulate filtration, low back pressure, and reduced noise, as well as improvement of engine efficiency and reduced air pollution.
In addition to the particular arrangement of said packing material, as described hereinabove, a preferred treatment of said material includes applying a synthetic oillike fluid to the packing material surfaces, thereby coating the surfaces as by impregnation, spraying, or dipping.
Impregnating fluids for use in this invention must be of low volatility and capable of withstanding temperatures of up to 600 F. in the presence of oxygen for prolonged periods of time without decomposition. Commercially available synthetic lubricants are obtainable for such use. A variety of silicone fluids having the necessary high temperature properties are suitable. In particular, dimethyl and methylphenyl polysiloxane fluids available from Dow Corning Corporation and designated as 210 and 710 series, respectively, have been used. Preferred fluids are designated as 210, 210H, 710G and 710R.
Ordinary hydrocarbon oils have been found to be unsuitable due to a break-down of their molecular structure resulting in carbon formation which clogs the internal mufller passages.
By coating the fibrous packing material with the lubricant described above unexpected results are obtained. Lower back pressures are achieved by reducing the fric tion of the moving gases passing through, and internal corrosion is also reduced. Particulate matter is more easily retained on the packing material surfaces.
In using the muffler constructed and assembled as described hereinabove, the mufller inlet conduit 14 may be of a flexible type with gradually increasing diameter away from the mufiier such that it is easily connectible to the engine exhaust pipe, located upstream of said muffier. Exhaust gases emanating from the internal combustion engine are conducted through conduit 14 into mufiler 10 where expansion occurs and where said gases intimately and uniformly contact and pass through the porous packing at a reduced velocity and emerge via conduit 16 into an exhaust tailpipe and are subsequently discharged into the atmosphere. Pollutants normally found in the exhaust gases are thereby filtered and/r converted to harmless products.
The variety of pollutants normally found in the exhaust gas may result from such factors as improper air-fuel mixtures, engine wear, combustion inefiiciencies, or any combination thereof. Therefore, it is common to find within such exhaust gas undesirable gaseous pollutants such as carbon monoxide, nitrous oxide and unreactive hydrocarbons, and solid particulate pollutants such as carbon particles, in addition to water vapor, nitrogen, carbon dioxide and oxygen.
As stated earlier, removal of the solid particles is by physical entrapment. Removal of the undesirable gaseous pollutants is by conversion of said pollutants to a chemical state considered to be non-contributing to atmospheric pollution, probably by a combination of temperature, and catalytic reaction.
It is believed that the combination of packing materials herein described having extensive surface areas promotes the ready removal and conversion of such pollutants.
In time, however, a build-up of particulate matter on the packing will lead to increased back pressure. Replacement of the packing material may be desirable, in which case it may be accomplished by cutting open the tube 12, removing its contents and substituting new material. As shown in FIG. 3, the tube 12 is constructed of two halves joined, after the packing material has been inserted, by a light weld or soldered seam 18. A reinforcing ring 19 may be internally Welded or tacked on the inner surface of one of said tube halves, thereby providing reinforcement and guiding means for joining both halves.
Alternatively, tube 12 may be constructed in such manner as depicted in FIG. 4 wherein each half of tube 12 is provided with continuous flange members 24 adjacently separated by sealing gasket 26 and held firmly in place by a circumferential removable clamp device 28. This construction facilitates removal and replacement of packing materials 20 and 22.
While a specific embodiment of the instant invention has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art.
What is claimed is:
1. An exhaust mufiler and filter comprising, an imperforate tube, end plates secured to said tube having inlet and outlet means disposed axially of the tube for directing the passage of high temperature exhaust gases therethrough, and a porous packing and filtering material substantially filling the internal volume of said tube between said end plates and across the tube, said packing and filtering material including a plurality of flat layers of fibrous glass and metallic fibers of substantially equal volume laid alternately on one another and rolled about an axis coincident with the axis of said tube to define coaxial tubular sleeves parallel to the direction of flow of the exhaust gases, each of said layers being completely impregnated with a silicone oil capable of withstanding normal muffler exhaust gas temperatures.
2. An exhaust mufller and filter according to claim 1,
wherein said tube and the enclosed packing and filtering material layers have flattened, ovoid cross-sections.
3. The device of claim 2, wherein said inlet and outlet means each provides an opening of much smaller crosssection than that of said imperforate tube.
4. The device of claim 3, wherein said tube is formed in two equal, l0ngitudinally aligned parts and joined by clamping means.
References Cited HARRY B. THORNTON, Primary Examiner B. NOZICK, Assistant Examiner US. Cl. X.R.
US765264A 1968-10-04 1968-10-04 Muffler Expired - Lifetime US3521429A (en)

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769780A (en) * 1971-11-23 1973-11-06 Bendix Corp Particle filter-sound muffler
US3880626A (en) * 1972-02-22 1975-04-29 Mine Safety Appliances Co Device for separating liquid from a gas stream
US3972694A (en) * 1974-11-14 1976-08-03 Whatman Reeve Angel Limited Filter tube
US4006054A (en) * 1974-11-14 1977-02-01 Whatman Reeve Angel Limited Method of making filter tubes
US4027476A (en) * 1973-10-15 1977-06-07 Rocket Research Corporation Composite catalyst bed and method for making the same
US4319660A (en) * 1980-09-02 1982-03-16 The United States Of America As Represented By The Secretary Of The Army Mechanical noise suppressor for small rocket motors
US4361423A (en) * 1980-11-03 1982-11-30 Nkn Combination acoustical muffler and exhaust converter
US4372421A (en) * 1975-07-18 1983-02-08 Otis Jackson Vehicle exhaust system
EP0091413A2 (en) * 1982-04-06 1983-10-12 Scandinavian Glasfiber AB Container through which a gas flows, preferably a muffler, with fiberglass filling and method and apparatus for filling the same
WO1988003049A1 (en) * 1986-10-31 1988-05-05 Simmerlein Erlbacher Ewald W Filter device with liquid-wetted filter elements
US4755359A (en) * 1986-02-12 1988-07-05 Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung Arrangement for the removal of hydrogen
FR2664608A1 (en) * 1990-07-13 1992-01-17 Darcissac Gerard Protection of exhaust pipes by application of silicone
US5122270A (en) * 1989-04-11 1992-06-16 Seitz-Filter-Werke Theo & Geo Seitz Gmbh & Co. Filter cartridge or filter module consisting of flexible deep filter material
US5269921A (en) * 1989-04-11 1993-12-14 Seitz-Filter-Werke Gmbh & Co. Filter cartridge or filter module consisting of flexible deep filter material
US5298046A (en) * 1993-01-06 1994-03-29 Minnesota Mining And Manufacturing Company Diesel particulate filter element and filter
US5437701A (en) * 1993-08-05 1995-08-01 S.T. Technologies, Inc. Air filter and method of construction
US5630855A (en) * 1992-10-16 1997-05-20 Humanteknik Ab Moisture-collecting device
US6196351B1 (en) * 1999-06-04 2001-03-06 Lancaster Glass Fibre Limited Silencer cartridge
FR2821117A1 (en) * 2001-02-21 2002-08-23 Faurecia Ind CLEANABLE DEVICE FOR CLEANING EXHAUST GASES FROM AN ENGINE
US20060064966A1 (en) * 2004-09-29 2006-03-30 Caterpillar Inc. Crankcase ventilation system
US7185678B1 (en) * 2003-12-11 2007-03-06 Nitram Energy, Inc. Orifice plate diffuser
US20080053068A1 (en) * 2006-05-03 2008-03-06 Sangiovani Sergio V Device & Method for the Reduction of Emissions
EP1553266A3 (en) * 2004-01-09 2010-01-06 HONDA MOTOR CO., Ltd. Exhaust apparatus for small-sized engine
WO2019032773A1 (en) * 2017-08-10 2019-02-14 Donaldson Company, Inc. Fluid filtration apparatuses, systems, and methods
US11371404B2 (en) 2019-08-13 2022-06-28 Herbert Anderson Engine muffler apparatus
US11865488B2 (en) 2016-10-20 2024-01-09 Cummins Filtration Ip, Inc. Interrupted, directional emboss of flat sheet

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575657A (en) * 1925-06-03 1926-03-09 Straussler Nicholas Silencer for gaseous currents
US1807521A (en) * 1924-07-12 1931-05-26 Public Service Company Apparatus for cleaning gas
US1829401A (en) * 1928-01-09 1931-10-27 Ac Spark Plug Co Air cleaner
US2499018A (en) * 1948-01-26 1950-02-28 Christiano Frank Baffle type muffler with plural tubular passages
US3066462A (en) * 1959-02-09 1962-12-04 Shell Oil Co Demisting gas with mats
US3147097A (en) * 1962-04-09 1964-09-01 Aguas Cayetano Engine exhaust cleaner and muffler
US3181646A (en) * 1963-04-15 1965-05-04 Howard C Edwards Silencer having contiguous concentric layers of sound absorbent material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1807521A (en) * 1924-07-12 1931-05-26 Public Service Company Apparatus for cleaning gas
US1575657A (en) * 1925-06-03 1926-03-09 Straussler Nicholas Silencer for gaseous currents
US1829401A (en) * 1928-01-09 1931-10-27 Ac Spark Plug Co Air cleaner
US2499018A (en) * 1948-01-26 1950-02-28 Christiano Frank Baffle type muffler with plural tubular passages
US3066462A (en) * 1959-02-09 1962-12-04 Shell Oil Co Demisting gas with mats
US3147097A (en) * 1962-04-09 1964-09-01 Aguas Cayetano Engine exhaust cleaner and muffler
US3181646A (en) * 1963-04-15 1965-05-04 Howard C Edwards Silencer having contiguous concentric layers of sound absorbent material

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769780A (en) * 1971-11-23 1973-11-06 Bendix Corp Particle filter-sound muffler
US3880626A (en) * 1972-02-22 1975-04-29 Mine Safety Appliances Co Device for separating liquid from a gas stream
US4027476A (en) * 1973-10-15 1977-06-07 Rocket Research Corporation Composite catalyst bed and method for making the same
US3972694A (en) * 1974-11-14 1976-08-03 Whatman Reeve Angel Limited Filter tube
US4006054A (en) * 1974-11-14 1977-02-01 Whatman Reeve Angel Limited Method of making filter tubes
US4372421A (en) * 1975-07-18 1983-02-08 Otis Jackson Vehicle exhaust system
US4319660A (en) * 1980-09-02 1982-03-16 The United States Of America As Represented By The Secretary Of The Army Mechanical noise suppressor for small rocket motors
US4361423A (en) * 1980-11-03 1982-11-30 Nkn Combination acoustical muffler and exhaust converter
EP0091413A2 (en) * 1982-04-06 1983-10-12 Scandinavian Glasfiber AB Container through which a gas flows, preferably a muffler, with fiberglass filling and method and apparatus for filling the same
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