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GB1358539A - Silencing apparatus - Google Patents

Silencing apparatus

Info

Publication number
GB1358539A
GB1358539A GB2982570A GB2982570A GB1358539A GB 1358539 A GB1358539 A GB 1358539A GB 2982570 A GB2982570 A GB 2982570A GB 2982570 A GB2982570 A GB 2982570A GB 1358539 A GB1358539 A GB 1358539A
Authority
GB
United Kingdom
Prior art keywords
bulk
spiral
head
cylindrical portion
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2982570A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COWL IND Ltd
Original Assignee
COWL IND Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by COWL IND Ltd filed Critical COWL IND Ltd
Priority to GB2982570A priority Critical patent/GB1358539A/en
Priority to CA115,189A priority patent/CA943417A/en
Priority to US152959A priority patent/US3692142A/en
Publication of GB1358539A publication Critical patent/GB1358539A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F01N1/12—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using spirally or helically shaped channels
    • F01N1/125—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using spirally or helically shaped channels in combination with sound-absorbing materials

Landscapes

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

Abstract

1358539 Treating exhaust gas COWL INDUSTRIES Ltd 18 June 1971 [19 June 1970] 29825/70 Heading F1B Silencer for engine exhaust or compressor intake comprises a housing consisting of a cylindrical portion 11 and conical end caps 12 and 13. The cylindrical portion consists of a metal sheet formed into a spiral, the inner end having the same radius as an inlet pipe 16 and the outer end being welded to the outer surface of the outermost turn of the spiral. The flat end surfaces of the spiral are secured to sheet metal bulk-heads 17 and 25 which have perforations equal to about 40% of their area. The spaces between the bulk-heads and the end caps are filled with sound absorbent material e. g. rock-wool. A sound absorbing lining 22 is attached to one surface of the spiral, or is held against it by a perforated or expanded metal sheet 23. Gas enters the pipe 16, which is welded to the end cap 13 and to an opening in the bulk-head 17, and passes around the spiral duct 15 to the outermost turn thereof. Deflector plates 24 direct the gas to an aperture at the periphery of the bulk-head 25. A channel member 29 extends between the bulkhead 25 and a further bulk-head 27, which defines with the cap 14, an expansion chamber 30 communicating with an outlet pipe 31. Alternatively the channel member may extend from the bulk-head 25 to the outlet pipe 31. Instead of discharging the gases axially, an outlet opening may be formed in the outer surface of the cylindrical portion, adjacent the position of the plates 24, so that the gases leave tangentially.
GB2982570A 1970-06-19 1970-06-19 Silencing apparatus Expired GB1358539A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2982570A GB1358539A (en) 1970-06-19 1970-06-19 Silencing apparatus
CA115,189A CA943417A (en) 1970-06-19 1971-06-09 Spiral muffler
US152959A US3692142A (en) 1970-06-19 1971-06-14 Spiral muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2982570A GB1358539A (en) 1970-06-19 1970-06-19 Silencing apparatus

Publications (1)

Publication Number Publication Date
GB1358539A true GB1358539A (en) 1974-07-03

Family

ID=10297794

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2982570A Expired GB1358539A (en) 1970-06-19 1970-06-19 Silencing apparatus

Country Status (3)

Country Link
US (1) US3692142A (en)
CA (1) CA943417A (en)
GB (1) GB1358539A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2176319C2 (en) * 2000-01-24 2001-11-27 Францев Владимир Федорович Muffler for internal combustion engine
RU2241127C1 (en) * 2003-05-12 2004-11-27 Францев Владимир Федорович Internal combustion engine muffler
CN113081593A (en) * 2021-03-10 2021-07-09 何君品 Noise reduction closed cabin and breathing auxiliary system

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927731A (en) * 1974-04-10 1975-12-23 Carter James B Ltd Muffler with spiral duct and double inlets
US4046219A (en) * 1975-03-20 1977-09-06 Brunswick Corporation Exhaust silencer apparatus for internal combustion engine
US3989121A (en) * 1975-05-14 1976-11-02 Tenneco Inc. Pulse converting exhaust silencing system
US4010886A (en) * 1975-06-23 1977-03-08 The Budd Company Means and methods for making a spiral muffler
DE2612421C3 (en) * 1976-03-24 1979-11-29 Fa. J. Eberspaecher, 7300 Esslingen Exhaust silencer
US4122913A (en) * 1976-08-09 1978-10-31 Stemp Leslie W Silencer
US4507660A (en) * 1982-07-16 1985-03-26 Advanced Electromagnetics, Inc. Anechoic chamber
US5009579A (en) * 1988-08-15 1991-04-23 Grant Airmass Corporation Fluid pump encasement
US5612006A (en) * 1995-07-05 1997-03-18 Fisk; James C. Catalytic converter and phase-spreading spiral muffler assembly
EP2182186B1 (en) 1996-09-30 2011-11-16 Silentor Holding A/S Gas flow silencer
US6520286B1 (en) 1996-09-30 2003-02-18 Silentor Holding A/S Silencer and a method of operating a vehicle
AU3025999A (en) 1998-03-30 1999-10-18 Silentor Notox A/S A silencer and a method of operating a vehicle
DK1268989T3 (en) * 2000-03-21 2007-01-08 Silentor Holding As Attenuators containing one or more porous bodies
RU2223407C2 (en) * 2001-08-06 2004-02-10 Францев Владимир Федорович Muffler housing
US6959782B2 (en) * 2002-03-22 2005-11-01 Tecumseh Products Company Tuned exhaust system for small engines
US8602159B2 (en) 2011-08-04 2013-12-10 Chris B. Harris Compact muffler for small two-stroke internal combustion engines
US9255502B1 (en) 2013-08-15 2016-02-09 Northwest Uld, Inc. Engine with exhaust system and external acoustic emissions valve
US10344660B1 (en) 2016-05-02 2019-07-09 Northwest Uld, Inc. Aerodynamically conformal muffler
US20200049142A1 (en) * 2018-08-10 2020-02-13 Quincy Compressor Llc Noise reducing silencer with spiral chambers for a compressor
RU2729222C1 (en) * 2020-03-03 2020-08-05 Владимир Федорович Францев Spiral ice silencer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2176319C2 (en) * 2000-01-24 2001-11-27 Францев Владимир Федорович Muffler for internal combustion engine
RU2241127C1 (en) * 2003-05-12 2004-11-27 Францев Владимир Федорович Internal combustion engine muffler
CN113081593A (en) * 2021-03-10 2021-07-09 何君品 Noise reduction closed cabin and breathing auxiliary system
CN113081593B (en) * 2021-03-10 2022-07-01 何君品 Noise-cancelling airtight cabin and breathing assistance system

Also Published As

Publication number Publication date
US3692142A (en) 1972-09-19
CA943417A (en) 1974-03-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years