US3125182A - earley - Google Patents

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US3125182A
US3125182A US3125182DA US3125182A US 3125182 A US3125182 A US 3125182A US 3125182D A US3125182D A US 3125182DA US 3125182 A US3125182 A US 3125182A
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shell
plates
muffler
compartment
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • 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
    • Y10S181/00—Acoustics
    • Y10S181/403—Refrigerator compresssor muffler

Definitions

  • Refrigerating machines of the type having a motorcompressor unit are usually provided with a muffler connected to the compressor discharge line. It is desirable for a discharge muffler to be large in volume and/or provide a long flow path in order that disturbing low frequency sounds, as well as sounds of intermediate and high frequency, will be effectively deadened. In the interest of producing a compact refrigerating machine, it is also desirable that the overall size of the discharge muffler be as small as possible for the noise reduction it accomplishes.
  • the existing mufer shell can be interiorly partitioned to provide a plurality of compartments. These compartments are then connected together by a tube which effectively extends the flow path through the muffler.
  • This practice is disadvantageous from a cost standpoint, however, because the additional parts and labor required appreciably add to the overall manufacturing cost of the muffler.
  • an improved muffler which is capable of simple and economical manufacture, and which has a lower cut-off frequency than prior art mufflers of comparable size and cost.
  • the improved muffler comprises a hollow shell having an inlet and an outlet for connection in the compressor discharge line. Disposed within the mufiler shell between the inlet and the outlet, is a wall that partitions the shell interior into two compartments.
  • the wall is constructed of two juxtaposed plates, at least one of which has a recess or depression embossed therein to provide a tubular passage between the plates.
  • the wall comprises twin plates of flat metal; and it is also desirable that each plate have a similar depression formed therein so that, when like broad surfaces of the two plates are held together, the respective depressions are in complementary relationship.
  • Each plate also has an opening formed therein at or adjacent one end of the depression so that, in properly assembled relationship, the plate openings are offset from each other and provide a flow path between the respective compartments and the tubular passage between the plates.
  • this improved muffler is preferably secured together by a furnace brazing process, an efficient assembly operation commonly used in the construction of refrigeration apparatus. Moreover, fewer dissimilar parts are required to construct this muffler than prior art mufflers; all of which accomplishes savings in manufacturing expense.
  • FIG. 1 is a view, partly in vertical section and partly in elevation, of a motor-compressor unit which embodies the invention and is shown with other, schematically illustrated, parts of a refrigeration system;
  • FIG. 2 is an enlarged front perspective view of the improved muffler, constructed and arranged according to the invention, with portions of the muffler shell broken away to show the partition employed therein;
  • FIG. 3 is an enlarged rear perspective view, similar to FIG. 2, of the same muffler
  • FIG. 4 is an enlarged front elevational view of the muffler partition of FIG. 2;
  • FIG. 5 is a horizontal sectional view of the partition, taken along l-ine V-V of FIG. 4.
  • the invention is applied to a motor-compressor unit which is designated as a whole by the numeral 8 and entirely enclosed within a hermetically sealed casing 9.
  • the motor-compressor unit S includes a piston 10 which slides back and forth in a cylinder 11 when it receives reciprocating forces, through a connecting rod 12 and crank 13, from a vertical shaft motor 14. It will Suice to say that compressed refrigerant gas leaves the compressor cylinder 11 through an outlet 15, passes through muffler 16, and is delivered to a condenser 17 exteriorly of the hermetically-sealed casing 9 by means of a discharge conduit 18.
  • Condensed refrigerant is expanded through expansion means 20 and boiled off in an evaporator 21, from whence it is returned to the motorcompressor unit 8 through a suction line 22.
  • refrigerant is returned to the cylinder 11 through an inlet tube 23 after it has passed through and/ or around the motor 14.
  • Disturbing noises would otherwise emanate from the motor-compressor unit' were it not for the ability of the muffler 16 to minimize the pulsations of the compressed gas.
  • One way of muilling the sound of pulsating discharge gas is to cause the gasto travel through a series of alternately diverging and converging passages. Such is the type of muffler described herein.
  • the muffler 16 includes a casing or shell 24, preferably a hollow cylinder having a side wall 25 formed about a longitudinal axis and sealed at its ends by cap members 26. Interiorly of the shell 24 there is an elongated wall or partition 27 which lies in a plane containing the axis of the shell and divides the shell into two compartments. 'I'he shell 24 is provided with an inlet 29 and an outlet 30, and the partition 27 is disposed between them. In accordance with this invention, communication between the two compartments is provided by an elongated passage formed by and between a pair of plates 32 which form the partition 27.
  • the tubular passage between the shell compartments is preferably long in order that, with a longer flow path, the frequency range of the sounds deadened by the mufiler will be extended to include still lower frequencies.
  • this invention provides for the partition 27 to be comprised of a pair of flat metal plates 32, wherein the plates are held juxtaposed with one broad surface of each in mutually facing relationship. At least one of the plates 32, and preferably both of them, are embossed to provide elongated depressions 34 in their respective facing surfaces. Where both plates 32 are embossed, as in the illustrated embodiment, their depressions or recesses 34 are similarly formed so that they will complement each other and together define the elongated tubular passage between the plates.
  • each plate 32 is further provided with an opening 36, at one end of the depression 34, which provides communication between the respective compartment and the passage between the plates. These openings 36 are offset from each other in the assembled partition 27.
  • twin plates 32 be employed.
  • each plate 32 is of at rectangular shape and has a similarly embossed depression in its complementary surface which extends along a non-rectilinear, preferably U-shaped line that is symmetrical with respect to the coincident axes or centerlines of the shell 24 and the partition 27.
  • the depression 34 extends, therefore, from the plate opening 36 on one side of the axis or plate centerline to a blind terminus on the other side of the axis.
  • the two plates 32 are preferably held together by brazing, welding or otherwise fastening together their facing surfaces.
  • This plate-joining operation can be performed prior to inserting the plates into the shell 24; or, if furnace brazing is employed, the plates can be assembled in the shell with brazing material 33 therebetween and secured together at the same time that the end caps 26 and the edges of the partition 27 are joined to the shell. The latter method is preferred.
  • said mufer comprising a cylindrical shell and a wall containing the axis of said shell for partitioning the interior of said shell into iirst and second compartments,
  • said shell being provided with an inlet for said trst compartment and an outlet for said second compartment,
  • said wall comprising twin plates of flat rectangular shape
  • each of said plates being provided with a depression in one surface thereof which extends from one side of said axis to the other along a U-shaped line that is symmetrical with respect to said axis,
  • each of said plates having an opening formed therein at one end of said line
  • a mufer for a gas compressor comprising an elongated shell I and an elongated wall lying in a plane parallel to the major axis of said shell and partitioning the interior of the shell into tirst and second elongated compartments,
  • said shell being provided with an inlet for the rst compartment and an outlet for the second compartment,
  • said wall comprising a pair of plates held together with one broad surface of one plate in mutually facing relationship with one broad surface of the other plate,
  • one plate being provided with a depression in its mutually facing surface extending along an elongated U-shaped line and, together with the other plate, forming an elongated U-shaped passage, the legs of said U lying at opposite sides of,v and parallel to, the longitudinal axis of said wall,
  • one plate having an opening at one end of the passage to provide communication with one compartment and the other plate having an opening at the other end of the passage to provide communication with the other compartment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Description

R. W. EARLEY March 17, 1964 MUFFLER Original Filed Oct. 3l, 1958 I Eva/Donn roR CONDE/vsn? INVENTOR ROB FIGA.
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am' :ARLEY SYM@ ATTORNEY FIGZ.l
United States Patent 3,125,182 MUFFLER Robert W. Earley, Worthington, Ohio, assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa., a
corporation of Pennsylvania Continuation of application Ser. No. 771,069, Oct. 31, 1958. This application Dec. 22, 1961, Ser. No. 162,319
2 Claims. (Cl. 181-53) This invention relates to mufllers, and more particularly to an improved mufer for refrigerant compressors. It is a continuation of application Serial No. 771,069, filed October 31, 1958, now abandoned.
Refrigerating machines of the type having a motorcompressor unit are usually provided with a muffler connected to the compressor discharge line. It is desirable for a discharge muffler to be large in volume and/or provide a long flow path in order that disturbing low frequency sounds, as well as sounds of intermediate and high frequency, will be effectively deadened. In the interest of producing a compact refrigerating machine, it is also desirable that the overall size of the discharge muffler be as small as possible for the noise reduction it accomplishes.
Where it is desired to extend the frequency range of a single chamber muffler to include still lower frequencies, Without altering the muffler shell, the existing mufer shell can be interiorly partitioned to provide a plurality of compartments. These compartments are then connected together by a tube which effectively extends the flow path through the muffler. This practice is disadvantageous from a cost standpoint, however, because the additional parts and labor required appreciably add to the overall manufacturing cost of the muffler.
In accordance with the present invention an improved muffler is provided which is capable of simple and economical manufacture, and which has a lower cut-off frequency than prior art mufflers of comparable size and cost. The improved muffler comprises a hollow shell having an inlet and an outlet for connection in the compressor discharge line. Disposed within the mufiler shell between the inlet and the outlet, is a wall that partitions the shell interior into two compartments. The wall is constructed of two juxtaposed plates, at least one of which has a recess or depression embossed therein to provide a tubular passage between the plates. Preferably, the wall comprises twin plates of flat metal; and it is also desirable that each plate have a similar depression formed therein so that, when like broad surfaces of the two plates are held together, the respective depressions are in complementary relationship. Each plate also has an opening formed therein at or adjacent one end of the depression so that, in properly assembled relationship, the plate openings are offset from each other and provide a flow path between the respective compartments and the tubular passage between the plates.
The component parts of this improved muffler are preferably secured together by a furnace brazing process, an efficient assembly operation commonly used in the construction of refrigeration apparatus. Moreover, fewer dissimilar parts are required to construct this muffler than prior art mufflers; all of which accomplishes savings in manufacturing expense.
The various objects, features and advantages of the invention will appear more fully from the detailed description and claims taken in connection with the accompanying drawings, forming a part of this application, in which:
FIG. 1 is a view, partly in vertical section and partly in elevation, of a motor-compressor unit which embodies the invention and is shown with other, schematically illustrated, parts of a refrigeration system;
FIG. 2 is an enlarged front perspective view of the improved muffler, constructed and arranged according to the invention, with portions of the muffler shell broken away to show the partition employed therein;
FIG. 3 is an enlarged rear perspective view, similar to FIG. 2, of the same muffler;
FIG. 4 is an enlarged front elevational view of the muffler partition of FIG. 2; and
FIG. 5 is a horizontal sectional view of the partition, taken along l-ine V-V of FIG. 4.
The invention, as shown, is applied to a motor-compressor unit which is designated as a whole by the numeral 8 and entirely enclosed within a hermetically sealed casing 9. The motor-compressor unit S includes a piston 10 which slides back and forth in a cylinder 11 when it receives reciprocating forces, through a connecting rod 12 and crank 13, from a vertical shaft motor 14. It will Suice to say that compressed refrigerant gas leaves the compressor cylinder 11 through an outlet 15, passes through muffler 16, and is delivered to a condenser 17 exteriorly of the hermetically-sealed casing 9 by means of a discharge conduit 18. Condensed refrigerant is expanded through expansion means 20 and boiled off in an evaporator 21, from whence it is returned to the motorcompressor unit 8 through a suction line 22. Upon entering the casing 9, refrigerant is returned to the cylinder 11 through an inlet tube 23 after it has passed through and/ or around the motor 14.
Disturbing noises would otherwise emanate from the motor-compressor unit' were it not for the ability of the muffler 16 to minimize the pulsations of the compressed gas. One way of muilling the sound of pulsating discharge gas is to cause the gasto travel through a series of alternately diverging and converging passages. Such is the type of muffler described herein.
The muffler 16 includes a casing or shell 24, preferably a hollow cylinder having a side wall 25 formed about a longitudinal axis and sealed at its ends by cap members 26. Interiorly of the shell 24 there is an elongated wall or partition 27 which lies in a plane containing the axis of the shell and divides the shell into two compartments. 'I'he shell 24 is provided with an inlet 29 and an outlet 30, and the partition 27 is disposed between them. In accordance with this invention, communication between the two compartments is provided by an elongated passage formed by and between a pair of plates 32 which form the partition 27.
The tubular passage between the shell compartments is preferably long in order that, with a longer flow path, the frequency range of the sounds deadened by the mufiler will be extended to include still lower frequencies.
Accordingly, this invention provides for the partition 27 to be comprised of a pair of flat metal plates 32, wherein the plates are held juxtaposed with one broad surface of each in mutually facing relationship. At least one of the plates 32, and preferably both of them, are embossed to provide elongated depressions 34 in their respective facing surfaces. Where both plates 32 are embossed, as in the illustrated embodiment, their depressions or recesses 34 are similarly formed so that they will complement each other and together define the elongated tubular passage between the plates.
To complete the flow path through the muffier 16 each plate 32 is further provided with an opening 36, at one end of the depression 34, which provides communication between the respective compartment and the passage between the plates. These openings 36 are offset from each other in the assembled partition 27.
In the interest of minimizing the number of dissimilar component parts in the assembly it is preferred that twin plates 32 be employed. Where, as illustrated, the shell 24 is cylindrical, each plate 32 is of at rectangular shape and has a similarly embossed depression in its complementary surface which extends along a non-rectilinear, preferably U-shaped line that is symmetrical with respect to the coincident axes or centerlines of the shell 24 and the partition 27. The depression 34 extends, therefore, from the plate opening 36 on one side of the axis or plate centerline to a blind terminus on the other side of the axis. Consequently, when the plates 32 are turned with respect to each other, and like sides of the plates are held together, their depressions 34 are in complementary relationship, their openings 36 are offset from each other and the plate centerlines, and an open ended, elongated passage is provided between the plates. The flow path through the mufer 16 can be traced from the shell inlet 29 into a iirst compartment, through the U- shaped passage in the partition 27, into the second compartment, and out the shell outlet 30.
The two plates 32 are preferably held together by brazing, welding or otherwise fastening together their facing surfaces. This plate-joining operation can be performed prior to inserting the plates into the shell 24; or, if furnace brazing is employed, the plates can be assembled in the shell with brazing material 33 therebetween and secured together at the same time that the end caps 26 and the edges of the partition 27 are joined to the shell. The latter method is preferred.
From the foregoing it will be apparent that a mutller having fewer dissimilar parts and the ability to munie sounds of lower frequency than mufers of comparable size and cost has been provided.
While the invention has been shown in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modications without departing from the spirit thereof.
What is claimed is:
1. A muier for a gas compreessor,
said mufer comprising a cylindrical shell and a wall containing the axis of said shell for partitioning the interior of said shell into iirst and second compartments,
said shell being provided with an inlet for said trst compartment and an outlet for said second compartment,
said wall comprising twin plates of flat rectangular shape,
each of said plates being provided with a depression in one surface thereof which extends from one side of said axis to the other along a U-shaped line that is symmetrical with respect to said axis,
each of said plates having an opening formed therein at one end of said line,
said plates being secured together with their respective depressions in complementary relationship and their respective openings` offset from each other so that a passage connecting said compartments is provided. Y
2. A mufer for a gas compressor comprising an elongated shell I and an elongated wall lying in a plane parallel to the major axis of said shell and partitioning the interior of the shell into tirst and second elongated compartments,
said shell being provided with an inlet for the rst compartment and an outlet for the second compartment,
said wall comprising a pair of plates held together with one broad surface of one plate in mutually facing relationship with one broad surface of the other plate,
one plate being provided with a depression in its mutually facing surface extending along an elongated U-shaped line and, together with the other plate, forming an elongated U-shaped passage, the legs of said U lying at opposite sides of,v and parallel to, the longitudinal axis of said wall,
one plate having an opening at one end of the passage to provide communication with one compartment and the other plate having an opening at the other end of the passage to provide communication with the other compartment,
whereby the pulsating gas flowing from said rst compartment to said second compartment is caused to flow through said elongated U-shaped passage to munie the pulsating sound of the gas.
References Cited in the tile of this patent UNITED STATES PATENTS 1,490,957 Birger Apr. 22, 1924 1,682,316 Williams Aug. 28, 1928 2,659,450 Baird Nov. 17, 1953 2,966,955 Smith et al. Jan. 3, 1961 FOREIGN PATENTS 65,450 Sweden June 26, 1928 719,975 Great Britain Dec. 8, 1954 1,123,100 France June 4, 1956

Claims (1)

1. A MUFFLER FOR A GAS COMPRESSOR, SAID MUFFLER COMPRISING A CYLINDRICAL SHELL AND A WALL CONTAINING THE AXIS OF SAID SHELL FOR PARTITIONING THE INTERIOR OF SAID SHELL INTO FIRST AND SECOND COMPARTMENTS, SAID SHELL BEING PROVIDED WITH AN INLET FOR SAID FIRST COMPARTMENT AND AN OUTLET FOR SAID SECOND COMPARTMENT, SAID WALL COMPRISING TWIN PLATES OF FLAT RECTANGULAR SHAPE, EACH OF SAID PLATES BEING PROVIDED WITH A DEPRESSION IN ONE SURFACE THEREOF WHICH EXTENDS FROM ONE SIDE OF SAID AXIS TO THE OTHER ALONG A U-SHAPED LINE THAT IS SYMMETRICAL WITH RESPECT TO SAID AXIS, EACH OF SAID PLATES HAVING AN OPENING FORMED THEREIN AT ONE END OF SAID LINE, SAID PLATES BEING SECURED TOGETHER WITH THEIR RESPECTIVE DEPRESSIONS IN COMPLEMENTARY RELATIONSHIP AND THEIR RESPECTIVE OPENINGS OFFSET FROM EACH OTHER SO THAT A PASSAGE CONNECTING SAID COMPARTMENTS IS PROVIDED.
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Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198284A (en) * 1961-09-06 1965-08-03 Walker Mfg Co Muffler
US3504762A (en) * 1966-11-18 1970-04-07 Danfoss As Sound-absorbing system for refrigerant compressor
US3750840A (en) * 1968-10-08 1973-08-07 Danfoss As Sound absorber for compressors
EP0027311A1 (en) * 1979-10-10 1981-04-22 Tecumseh Products Company Gas compressor with a muffler
US4836330A (en) * 1988-08-03 1989-06-06 Ap Industries, Inc. Plural chamber stamp formed muffler with single intermediate tube
US4860853A (en) * 1988-12-20 1989-08-29 Ap Parts Manufacturing Company Stamp formed muffler with nonplanar array of tubes
US4894987A (en) * 1988-08-19 1990-01-23 Ap Parts Manufacturing Company Stamp formed muffler and catalytic converter assembly
US4901815A (en) * 1988-10-18 1990-02-20 Parts Manufacturing Company Stamp formed mufflers
US4901816A (en) * 1989-01-23 1990-02-20 Ap Parts Manufacturing Company Light weight hybrid exhaust muffler
US4905791A (en) * 1989-01-23 1990-03-06 Ap Parts Manufacturing Company Light weight hybrid exhaust muffler and method of manufacture
US4909348A (en) * 1988-01-20 1990-03-20 Ap Parts Manufacturing Company Stamp formed exhaust muffler with conformal outer shell
US4924968A (en) * 1988-08-03 1990-05-15 Ap Parts Manufacturing Company Stamp formed muffler with reinforced outer shell
US4928372A (en) * 1989-04-07 1990-05-29 Ap Parts Manufacturing Company Process for manufacturing stamp formed mufflers
US4958701A (en) * 1990-03-26 1990-09-25 Ap Parts Manufacturing Company Stamp formed muffler with pocket-free baffle crease
USRE33370E (en) * 1986-11-25 1990-10-09 Ap Parts Manufacturing Company Stamp formed muffler
US5004069A (en) * 1990-01-26 1991-04-02 Ap Parts Manufacturing Company Stamp formed muffler with transverse baffle tube
US5173577A (en) * 1990-09-04 1992-12-22 Ap Parts Manufacturing Co. Stamp formed muffler with low back pressure
EP0542169A1 (en) * 1991-11-09 1993-05-19 Peter Wilms Silencer for a screw compressor
US5252788A (en) * 1992-04-10 1993-10-12 Ap Parts Manufacturing Co. Stamp formed muffler with in-line expansion chamber and arcuately formed effective flow tubes
US5428194A (en) * 1993-10-19 1995-06-27 Ap Parts Manufacturing Company Narrow width stamp formed muffler
US5448831A (en) * 1993-11-08 1995-09-12 Ap Parts Manufacturing Company Method of manufacturing a stamp formed muffler with hermetically sealed laminated outer shell
US5452991A (en) * 1993-05-20 1995-09-26 Matsushita Refrigeration Company Hermetic compressor with pressure pulsation reducing mechanism for refrigerant
US5597986A (en) * 1995-02-27 1997-01-28 Ap Parts Manufacturing Company Stamp formed muffler with nested chambers
US5717173A (en) * 1994-03-02 1998-02-10 Ap Parts Manufacturing Company Exhaust mufflers with stamp formed internal components and method of manufacture
US5816361A (en) * 1994-03-02 1998-10-06 Ap Parts Manufacturing Company Exhaust mufflers with stamp formed internal components and method of manufacture
US5907904A (en) * 1996-03-22 1999-06-01 Ap Parts Manufacturing Company Method of manufacturing an exhaust muffler with stamp formed internal components
US6164412A (en) * 1998-04-03 2000-12-26 Arvin Industries, Inc. Muffler
US6341664B1 (en) 2000-01-13 2002-01-29 Goerlich's Inc. Exhaust muffler with stamp formed internal assembly
US6415889B1 (en) 1998-01-30 2002-07-09 Arvinmeritor, Inc. Stamped-formed muffler apparatus and assembly process
US6520289B1 (en) * 1999-02-26 2003-02-18 Embraco Europe S.R.L. Intake silencer for sealed refrigerant compressor
US6659222B1 (en) * 1999-03-05 2003-12-09 Arvinmeritor, Inc. Multi-chambered muffler
US20090000863A1 (en) * 2007-06-28 2009-01-01 Share Win Industry Co., Ltd. Exhaust pipe
US20090090579A1 (en) * 2007-10-03 2009-04-09 Denso Corporation Silencer for refrigeration cycle system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490957A (en) * 1920-07-08 1924-04-22 Richard Ernst Method and device for muffling the noise of the exhaust gases of internal-combustion engines
US1682316A (en) * 1928-08-28 williams
US2659450A (en) * 1950-08-18 1953-11-17 Fluor Corp Pulsation eliminator and gas cleaner
GB719975A (en) * 1952-08-27 1954-12-08 Vauxhall Motors Ltd Improvements in silencers for pulsating gaseous currents
FR1123100A (en) * 1954-05-06 1956-09-17 Bosch Gmbh Robert Sound absorber, for compressor
US2966955A (en) * 1958-08-13 1961-01-03 Roy B Smith Muffler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1682316A (en) * 1928-08-28 williams
US1490957A (en) * 1920-07-08 1924-04-22 Richard Ernst Method and device for muffling the noise of the exhaust gases of internal-combustion engines
US2659450A (en) * 1950-08-18 1953-11-17 Fluor Corp Pulsation eliminator and gas cleaner
GB719975A (en) * 1952-08-27 1954-12-08 Vauxhall Motors Ltd Improvements in silencers for pulsating gaseous currents
FR1123100A (en) * 1954-05-06 1956-09-17 Bosch Gmbh Robert Sound absorber, for compressor
US2966955A (en) * 1958-08-13 1961-01-03 Roy B Smith Muffler

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198284A (en) * 1961-09-06 1965-08-03 Walker Mfg Co Muffler
US3504762A (en) * 1966-11-18 1970-04-07 Danfoss As Sound-absorbing system for refrigerant compressor
US3750840A (en) * 1968-10-08 1973-08-07 Danfoss As Sound absorber for compressors
EP0027311A1 (en) * 1979-10-10 1981-04-22 Tecumseh Products Company Gas compressor with a muffler
US4330239A (en) * 1979-10-10 1982-05-18 Tecumseh Products Company Compressor muffler
USRE33370E (en) * 1986-11-25 1990-10-09 Ap Parts Manufacturing Company Stamp formed muffler
US4909348A (en) * 1988-01-20 1990-03-20 Ap Parts Manufacturing Company Stamp formed exhaust muffler with conformal outer shell
US4836330A (en) * 1988-08-03 1989-06-06 Ap Industries, Inc. Plural chamber stamp formed muffler with single intermediate tube
US4924968A (en) * 1988-08-03 1990-05-15 Ap Parts Manufacturing Company Stamp formed muffler with reinforced outer shell
US4894987A (en) * 1988-08-19 1990-01-23 Ap Parts Manufacturing Company Stamp formed muffler and catalytic converter assembly
US4901815A (en) * 1988-10-18 1990-02-20 Parts Manufacturing Company Stamp formed mufflers
US4860853A (en) * 1988-12-20 1989-08-29 Ap Parts Manufacturing Company Stamp formed muffler with nonplanar array of tubes
US4905791A (en) * 1989-01-23 1990-03-06 Ap Parts Manufacturing Company Light weight hybrid exhaust muffler and method of manufacture
US4901816A (en) * 1989-01-23 1990-02-20 Ap Parts Manufacturing Company Light weight hybrid exhaust muffler
US4928372A (en) * 1989-04-07 1990-05-29 Ap Parts Manufacturing Company Process for manufacturing stamp formed mufflers
US5004069A (en) * 1990-01-26 1991-04-02 Ap Parts Manufacturing Company Stamp formed muffler with transverse baffle tube
US4958701A (en) * 1990-03-26 1990-09-25 Ap Parts Manufacturing Company Stamp formed muffler with pocket-free baffle crease
US5173577A (en) * 1990-09-04 1992-12-22 Ap Parts Manufacturing Co. Stamp formed muffler with low back pressure
EP0542169A1 (en) * 1991-11-09 1993-05-19 Peter Wilms Silencer for a screw compressor
US5252788A (en) * 1992-04-10 1993-10-12 Ap Parts Manufacturing Co. Stamp formed muffler with in-line expansion chamber and arcuately formed effective flow tubes
US5452991A (en) * 1993-05-20 1995-09-26 Matsushita Refrigeration Company Hermetic compressor with pressure pulsation reducing mechanism for refrigerant
US5428194A (en) * 1993-10-19 1995-06-27 Ap Parts Manufacturing Company Narrow width stamp formed muffler
US5448831A (en) * 1993-11-08 1995-09-12 Ap Parts Manufacturing Company Method of manufacturing a stamp formed muffler with hermetically sealed laminated outer shell
US5717173A (en) * 1994-03-02 1998-02-10 Ap Parts Manufacturing Company Exhaust mufflers with stamp formed internal components and method of manufacture
US5816361A (en) * 1994-03-02 1998-10-06 Ap Parts Manufacturing Company Exhaust mufflers with stamp formed internal components and method of manufacture
US5597986A (en) * 1995-02-27 1997-01-28 Ap Parts Manufacturing Company Stamp formed muffler with nested chambers
US5907904A (en) * 1996-03-22 1999-06-01 Ap Parts Manufacturing Company Method of manufacturing an exhaust muffler with stamp formed internal components
US6415889B1 (en) 1998-01-30 2002-07-09 Arvinmeritor, Inc. Stamped-formed muffler apparatus and assembly process
US6164412A (en) * 1998-04-03 2000-12-26 Arvin Industries, Inc. Muffler
US6520289B1 (en) * 1999-02-26 2003-02-18 Embraco Europe S.R.L. Intake silencer for sealed refrigerant compressor
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