US3698510A - Safety silencer air nozzle - Google Patents
Safety silencer air nozzle Download PDFInfo
- Publication number
- US3698510A US3698510A US168861A US3698510DA US3698510A US 3698510 A US3698510 A US 3698510A US 168861 A US168861 A US 168861A US 3698510D A US3698510D A US 3698510DA US 3698510 A US3698510 A US 3698510A
- Authority
- US
- United States
- Prior art keywords
- baffle
- pressure
- exhaust
- air
- outlet
- 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 - Lifetime
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Classifications
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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
- F01N13/20—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 having flared outlets, e.g. of fish-tail shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
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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
- 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
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
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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
- 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
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
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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
- F04B39/0083—Pulsation and noise damping means using blow off silencers
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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
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/16—Methods or apparatus for fitting, inserting or repairing different elements by using threaded joints
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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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/30—Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow
Definitions
- ABSTRACT I52 U.S. Cl ..l8l/36 A, 181/50, 181/68, An exhaust safety silencer air nozzle includes a hous- I 181/7], l8l/72 ing having an inlet and an outlet with spaced porous [51] Int. Cl. ..F0ln l/l0, FOln l/24, FOln 7/20 baffles.
- a sound absorbing filter material is disposed [58] Field of Search ..l8l/36 R, 36 A, 46, 56, 60, in the housing between the baffles so that the air en- 181/71, 72 5Q, 2 34 tering the inlet is broken up by the inlet baffle for distribution through the sound absorbing filter material creating a back pressure and exhausts through the out- [56] References cued let baffle at which air flow is further broken up to con- UNITED STATES PATENTS siderably reduce the noise level and pressure of the exhausted air passing through the silencer.
- the present invention is adapted to incorporate that structure and to include therewith additional structure for providing a safety air nozzle which will reduce the pressure of flow of compressed air used for cleaning or blowing off a part to a value well within the limits defined in the Federal Rules. Under the Walsh-Healey I I Act 50-2048 compressed air shall not be used for cleaning purposes except where reduced to less than 30 psi and then only with effective chip guarding and personal protective equipment.
- FIG. 1 is a longitudinal cross section through the present exhaust safety air-nozzle.
- FIG. 2 is a right end view thereof.
- the present safety nozzle comprises a housing which at one end is attached to an exhaust pipe or conduit 12 having connection to a noise producing device such as a die blow off orto an air valve or to a source of compressed air whose pressure normally exceeds 30 p
- Said housing is generally cylindrical comprising an open ended tubular member 14.
- One end of member 14 is closed by a front end cap 16 which has a threaded bore 18 or inlet for attachment to compressed air supply pipe 12.
- a porous baffle 20 having a radial flange 22 which is clamped between end cap 16 and a radial shoulder 15.
- Said baffle is formed into a frustoconical section 24, which axially extends through member 14, having an inner closed end 26.
- Portion 24 forms an expansion chamber 28.
- Portion 24 is of such length as to provide a sufiiciently large internal surface area 30 for impingement of the exhaust or compressed air thereon and has a sufiicient chamber area to accommodate free expansion of the compressed air entering chamber 28.
- Baffle 20 is made of a gas permeable material which may be heat resistant and have a high porosity such as sintered bronze or the like, to permit the expanded air to enter cylindrical chamber 17 through the porous walls of the cone section 24.
- Chamber 17 is filled with a partly compressed sound absorbing filter material 32 of any known composition usually employed in silencer applications of this kind. These may include porous urethane, sponge rubber, felt, steel wool, coil screening and the like. All of these materials have difierent effects in absorbing sound at various frequencies and for creating a back pressure and, thus, reducing pressure of flow therethrough.
- a partly compressed sound absorbing filter material 32 of any known composition usually employed in silencer applications of this kind. These may include porous urethane, sponge rubber, felt, steel wool, coil screening and the like. All of these materials have difierent effects in absorbing sound at various frequencies and for creating a back pressure and, thus, reducing pressure of flow therethrough.
- baffle 34 which comprises a perforated disc supported within bore 17 and anchored at 36.
- Baffle 34 is composed of a gas permeable material having a porosity such as for instance, sintered bronze, or may be merely an apertured disc to permit exit of the muffled air at reduced air pressure from chamber 17 to atmosphere.
- exhaust or compressed air enters the nozzle structure through conduit 12 and into expansion chamber 28.
- the air is expanded in chamber 28 and impinges radially and axially against the internal surface 30 thereof for penetration through the porous walls of baffle 20 into chamber 17 to penetrate the compressed sound absorbing filter material 32, as indicated by the flow arrows.
- baffle plate 34 further breaks up the air flow as it passes therethrough to thereby, still further reduce noise level as the air exits.
- Outlet 46 is of a reduced diameter compared to the internal diameter of clamber 17. Outlet 46 may be used as a die blow-off without the safety bell 48, on applications of higher air pressure for blowing small parts from dies or tools. At psi, the air is filtered with a noise reduced to 84 DBA at 36 inches.
- the safety bell 48 constructed of a porous material is of outwardly diverging shape and at its inner end, is nested and secured within an annular undercut recess 52 in conical portion 42.
- the internal diameter of the bell at its inner end merges with and forms a continuation of outlet 46 to communicate with the outwardly diverging bore 50 which terminates in the outlet 54 of a diameter in excess of outlet 46.
- the filter 32 is constructed of a softer material and is packed to such extent as to produce a back pressure not allowing excessive air pressure beyond that specified by law to escape through the conical chamber 44, through the bell 48 and outlet 54 for the cleaning or blowing off of a part.
- the safety bell will allow air to be exhausted through its porous surface to atmosphere rather than to break the skin and produce any harmful effects to the worker or other personnel.
- a safety silencer and pressure reducing air nozzle comprising an elongated housing having a chamber
- one end of said housing being connected to a source of high pressure exhaust air
- a first baffle disposed within said housing adjacent said one end and formed in the shape of a truncated cylindrical cone providing an internal gas expansion chamber, with the apex of the cone remote from and aligned with said inlet;
- said first and second baffles being composed of a hard porous permeable material to permit penetration of said high pressure exhaust laterally and iongitudinally through the increased internal surfaces of said first baffle into said chamber and through said sound absorbing material for exit through said second baffle to the atmosphere;
- said first baffle being adapted to reduce the pressure and noise level of said high pressure exhaust to a first value lower than the initial entering value
- said sound absorbing material being softer than said baffle material and packed to such extent as to produce a back pressure for reducing the pressure of flow through said second baffle to further reduce the pressure and noise level of said high pressure exhaust to a second value lower than said first value;
- said second baffle being adapted to still further reduce the pressure and noise level of said exhaust to a third value lower than said first and second values;
- said housing outwardly of said second baffle having a converging portion terminating in an outlet of reduced diameter
- said safety bell being constructed of a porous material throughout whereby with its outlet against a human, air will exhaust laterally outward through its walls further reducing the pressure of outletting exhaust to a safe non-injurious level.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Silencers (AREA)
Abstract
An exhaust safety silencer air nozzle includes a housing having an inlet and an outlet with spaced porous baffles. A sound absorbing filter material is disposed in the housing between the baffles so that the air entering the inlet is broken up by the inlet baffle for distribution through the sound absorbing filter material creating a back pressure and exhausts through the outlet baffle at which air flow is further broken up to considerably reduce the noise level and pressure of the exhausted air passing through the silencer. The housing converges at its outlet and terminates in a throated outwardly flared bell to further reduce the exhaust air pressure for cleaning or blowing off a part.
Description
United States Patent 1151. 3,698,510 Blatt et al. 451 Oct. 17, 1972 [54] SAFETY SILENCER AIR NOZZLE 291,875 6/1928 Great Britain ..l8l/50 303,581 1/1929 Great Britain ..l8l/50 [72] lnvemm-s' gl 3"? 2%? 242,743 11/1925 Great Britain ..1s1/72 78,279 6/1955 Netherlands ..l8l/69- fgggz Fraser Mlch- 412,377 11/1966 Switzerland ..l8l/60 [22] Filed; Aug. 4, 1971 Primary Examiner-Robert's. Ward, Jr.
Attorney-Daniel G. Cullen et al. [21] Appl. No.: 168,861
[57] ABSTRACT I52] U.S. Cl ..l8l/36 A, 181/50, 181/68, An exhaust safety silencer air nozzle includes a hous- I 181/7], l8l/72 ing having an inlet and an outlet with spaced porous [51] Int. Cl. ..F0ln l/l0, FOln l/24, FOln 7/20 baffles. A sound absorbing filter material is disposed [58] Field of Search ..l8l/36 R, 36 A, 46, 56, 60, in the housing between the baffles so that the air en- 181/71, 72 5Q, 2 34 tering the inlet is broken up by the inlet baffle for distribution through the sound absorbing filter material creating a back pressure and exhausts through the out- [56] References cued let baffle at which air flow is further broken up to con- UNITED STATES PATENTS siderably reduce the noise level and pressure of the exhausted air passing through the silencer. The hous- 2,499,018 2/1950 cimsuano et "181/50 ing converges at its outlet and terminates in a throated 3,1 Bmgel outwardly flared to further reduce the exhaust air l,023,225 4/1912 Shlosberg l 8 I/69 X pressure for cleaning or blowing off a part 2,950,775 8/1960 Zwayer ..l8l/36 A FOREIGN PATENTS OR APPLICATIONS 1 Claim, 2 Drawing Figures 251 210 4/1926 Great Britain ..l8l/7l PATENTEDucI 11 m2 3,688,510
INVENTORS LELAND FRANCIS BLATT FRANK HENRY WIESENHOFER ATTORNEYS SAFETY SILENCER AIR NOZZLE BACKGROUND OF THE INVENTION The present invention represents an improvement over-the gas exhaust silencer disclosed in copending US. Pat. application, Ser. No. 81,051 filed Oct. 15, 1970 which was primarily directed to the problem of reducing the noise level of exhausts to an acceptable value.
The present invention is adapted to incorporate that structure and to include therewith additional structure for providing a safety air nozzle which will reduce the pressure of flow of compressed air used for cleaning or blowing off a part to a value well within the limits defined in the Federal Rules. Under the Walsh-Healey I I Act 50-2048 compressed air shall not be used for cleaning purposes except where reduced to less than 30 psi and then only with effective chip guarding and personal protective equipment.
It is an object of the present invention to provide an improved safety silencer air nozzle for cleaning purposes constructed to reduce the pressure of air flow from the nozzle below 30 psi.
It is another object to provide within the nozzle assembly a sound absorbing filter material which is soft and compacted to such extent as to develop a back pressure within the housing and accordingly reduce the pressure of air flowing therethrough.
It is another object to provide in conjunction with the housing a converging portion adjacent its outlet end, terminating in an outlet of reduced diameter, and assembled therewith a porous safety bell which merges therewith and flares outwardly with an outlet of increased diameter for again reducing the pressure of air flowing therethrough.
It is another object to construct the safety air bell of a porous material whereby if the outlet is partly abstructed by a person, some of the exhausting air will escape laterally through the walls thereof reducing the pressure of air flowing through the air nozzle, so as to avoid injury. I
These and other objects will be seen from the following specification and claims in conjunction with the appended drawing in which:
FIG. 1 is a longitudinal cross section through the present exhaust safety air-nozzle.
FIG. 2 is a right end view thereof.
DESCRIPTION OF THE INVENTION The present safety nozzle comprises a housing which at one end is attached to an exhaust pipe or conduit 12 having connection to a noise producing device such as a die blow off orto an air valve or to a source of compressed air whose pressure normally exceeds 30 p Said housing is generally cylindrical comprising an open ended tubular member 14. One end of member 14 is closed by a front end cap 16 which has a threaded bore 18 or inlet for attachment to compressed air supply pipe 12.
Within member 14 and adjacent end cap 16 is a porous baffle 20 having a radial flange 22 which is clamped between end cap 16 and a radial shoulder 15. Said baffle is formed into a frustoconical section 24, which axially extends through member 14, having an inner closed end 26. Portion 24 forms an expansion chamber 28. Portion 24 is of such length as to provide a sufiiciently large internal surface area 30 for impingement of the exhaust or compressed air thereon and has a sufiicient chamber area to accommodate free expansion of the compressed air entering chamber 28.
Baffle 20 is made of a gas permeable material which may be heat resistant and have a high porosity such as sintered bronze or the like, to permit the expanded air to enter cylindrical chamber 17 through the porous walls of the cone section 24.
Chamber 17 is filled with a partly compressed sound absorbing filter material 32 of any known composition usually employed in silencer applications of this kind. These may include porous urethane, sponge rubber, felt, steel wool, coil screening and the like. All of these materials have difierent effects in absorbing sound at various frequencies and for creating a back pressure and, thus, reducing pressure of flow therethrough.
Towards the opposite end of member 14, there is a porous baffle 34 which comprises a perforated disc supported within bore 17 and anchored at 36. Baffle 34 is composed of a gas permeable material having a porosity such as for instance, sintered bronze, or may be merely an apertured disc to permit exit of the muffled air at reduced air pressure from chamber 17 to atmosphere.
In operation, exhaust or compressed air enters the nozzle structure through conduit 12 and into expansion chamber 28. The air is expanded in chamber 28 and impinges radially and axially against the internal surface 30 thereof for penetration through the porous walls of baffle 20 into chamber 17 to penetrate the compressed sound absorbing filter material 32, as indicated by the flow arrows.
Initial sound level of the exhaust air or compressed air is considerably reduced by being minutely broken up as the air penetrates the porous walls of baffle 20. During penetration of the compressed air through the sound absorbing filter material 32, the sound level is further reduced to a still lower value. At the same time, a back pressure is created, further reducing the pressure of the flowing air.
The compressed air then impinges upon baffle plate 34 and passes therethrough. Baffle 34 further breaks up the air flow as it passes therethrough to thereby, still further reduce noise level as the air exits.
The safety bell 48 constructed of a porous material is of outwardly diverging shape and at its inner end, is nested and secured within an annular undercut recess 52 in conical portion 42. The internal diameter of the bell at its inner end merges with and forms a continuation of outlet 46 to communicate with the outwardly diverging bore 50 which terminates in the outlet 54 of a diameter in excess of outlet 46.
By this construction, there is a substantial reduction of the pressure of compressed air flowing through the outlet 54 at least below the 30 psi required by the Walsh-Healey Act to provide a safety flow of compressed air for the cleaning or blowing off of a part.
While the baffle 20 is constructed of a porous hard material, the filter 32 is constructed of a softer material and is packed to such extent as to produce a back pressure not allowing excessive air pressure beyond that specified by law to escape through the conical chamber 44, through the bell 48 and outlet 54 for the cleaning or blowing off of a part.
Should the blow off be in operation and placed directly on the skin of the user, under pressure, the safety bell will allow air to be exhausted through its porous surface to atmosphere rather than to break the skin and produce any harmful effects to the worker or other personnel.
Having described my invention, reference should now be had to the following claims.
lclaim:
1. A safety silencer and pressure reducing air nozzle comprising an elongated housing having a chamber;
a sound absorbing partly compacted filter material disposed within said chamber;
one end of said housing being connected to a source of high pressure exhaust air;
a first baffle disposed within said housing adjacent said one end and formed in the shape of a truncated cylindrical cone providing an internal gas expansion chamber, with the apex of the cone remote from and aligned with said inlet;
a second baffle disposed within said housing spaced from the other end thereof;
said first and second baffles being composed of a hard porous permeable material to permit penetration of said high pressure exhaust laterally and iongitudinally through the increased internal surfaces of said first baffle into said chamber and through said sound absorbing material for exit through said second baffle to the atmosphere;
said first baffle being adapted to reduce the pressure and noise level of said high pressure exhaust to a first value lower than the initial entering value;
said sound absorbing material being softer than said baffle material and packed to such extent as to produce a back pressure for reducing the pressure of flow through said second baffle to further reduce the pressure and noise level of said high pressure exhaust to a second value lower than said first value;
and said second baffle being adapted to still further reduce the pressure and noise level of said exhaust to a third value lower than said first and second values;
said housing outwardly of said second baffle having a converging portion terminating in an outlet of reduced diameter;
and a safety bell of outwardly diverging shape, at one end secured to said converging portion with its interior surface merging with said outlet and flaring outwardly at its outlet end;
said safety bell being constructed of a porous material throughout whereby with its outlet against a human, air will exhaust laterally outward through its walls further reducing the pressure of outletting exhaust to a safe non-injurious level.
Claims (1)
1. A safety silencer and pressure reducing air nozzle comprising an elongated housing having a chamber; a sound absorbing partly compacted filter material disposed within said chamber; one end of said housing being connected to a source of high pressure exhaust air; a first baffle disposed within said housing adjacent said one end and formed in the shape of a truncated cylindrical cone providing an internal gas expansion chamber, with the apex of the cone remote from and aligned with said inlet; a second baffle disposed within said housing spaced from the other end thereof; said first and second baffles being composed of a hard porous permeable material to permit penetration of said high pressure exhaust laterally and longitudinally through the increased internal surfaces of said first baffle into said chamber and through said sound absorbing material for exit through said second baffle to the atmosphere; said first baffle being adapted to reduce the pressure and noise level of said high pressure exhaust to a first value lower than the initial entering value; said sound absorbing material being softer than said baffle material and packed to such extent as to produce a back pressure for reducing the pressure of flow through said second baffle to further reduce the pressure and noise level of said high pressure exhaust to a second value lower than said first value; and said second baffle being adapted to still further reduce the pressure and noise level of said exhaust to a third value lower than said first and second values; said housing outwardly of said second baffle having a converging portion terminating in an outlet of reduced diameter; and a safety bell of outwardly diverging shape, at one end secured to said converging portion with its interior surface merging with said outlet and flaring outwardly at its outlet end; said safety bell being constructed of a porous material throughout whereby with its outlet against a human, air will exhaust laterally outward through its walls further reducing the pressure of outletting exhaust to a safe non-injurious level.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US16886171A | 1971-08-04 | 1971-08-04 |
Publications (1)
Publication Number | Publication Date |
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US3698510A true US3698510A (en) | 1972-10-17 |
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Family Applications (1)
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US168861A Expired - Lifetime US3698510A (en) | 1971-08-04 | 1971-08-04 | Safety silencer air nozzle |
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3889776A (en) * | 1973-06-14 | 1975-06-17 | Sherritt Gordon Mines Ltd | Exhaust gas silencer |
US3973642A (en) * | 1974-04-05 | 1976-08-10 | Sunne Gummifabrik Ab | Noise-reducing blowing nozzle |
US6267199B1 (en) * | 1999-10-15 | 2001-07-31 | Sound Ware Industry Co., Ltd. | Automobile exhaust tube |
US20080099277A1 (en) * | 2006-10-30 | 2008-05-01 | Basso Industry Corp. | Muffler for pneumatic tools |
US20100140015A1 (en) * | 2007-05-09 | 2010-06-10 | Stephan Weber | Silencer |
US20110005860A1 (en) * | 2009-07-13 | 2011-01-13 | Kwin Abram | Exhaust component with reduced pack |
US20150159528A1 (en) * | 2013-12-09 | 2015-06-11 | Dayco Ip Holdings, Llc | Noise attenuation unit for engine systems |
WO2016116617A1 (en) * | 2015-01-22 | 2016-07-28 | Linde Aktiengesellschaft | Prevention of combustion in storage silos |
US9534704B2 (en) | 2013-10-08 | 2017-01-03 | Dayco Ip Holdings, Llc | Noise attenuation in a check valve unit or apparatus for producing vacuum |
US9581258B2 (en) | 2014-01-20 | 2017-02-28 | Dayco Ip Holdings, Llc | Check valve with improved sealing member |
US9669815B2 (en) | 2014-08-19 | 2017-06-06 | Dayco Ip Holdings, Llc | Dual aspirator system with aspirator shut-off valve |
US10024339B2 (en) | 2014-05-30 | 2018-07-17 | Dayco Ip Holdings, Llc | Vacuum creation system having an ejector, pneumatic control valve and optionally an aspirator |
US10107240B2 (en) | 2014-04-04 | 2018-10-23 | Dayco Ip Holdings, Llc | Check valves and Venturi devices having the same |
US10190455B2 (en) | 2015-10-28 | 2019-01-29 | Dayco Ip Holdings, Llc | Venturi devices resistant to ice formation for producing vacuum from crankcase gases |
US10316864B2 (en) | 2015-04-13 | 2019-06-11 | Dayco Ip Holdings, Llc | Devices for producing vacuum using the venturi effect |
CN110099725A (en) * | 2016-12-26 | 2019-08-06 | 株式会社高压 | Gas system injector head with silencing function used for fire-extinguishing equipment and its keeping and assemble method |
US10422351B2 (en) | 2015-07-17 | 2019-09-24 | Dayco Ip Holdings, Llc | Devices for producing vacuum using the venturi effect having a plurality of subpassageways and motive exits in the motive section |
WO2020205224A1 (en) * | 2019-03-29 | 2020-10-08 | Tubemaster, Inc. | Air lance for removing pellets from tubes |
EP3734071A1 (en) * | 2019-04-29 | 2020-11-04 | Stephen Marsh Boyer | Noise & vibration reduction unit |
US20210197223A1 (en) * | 2019-12-29 | 2021-07-01 | Actasys, Inc. | Production Technique of Synthetic Jet Actuators |
US20230038911A1 (en) * | 2021-08-05 | 2023-02-09 | Makita Corporation | Air compressor |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1023225A (en) * | 1911-06-22 | 1912-04-16 | Mckenzie Cleland | Muffler for automobiles. |
GB242743A (en) * | 1924-09-29 | 1925-11-19 | Illtyd Idris Morgan | Improvements in silencers for internal combustion engines |
GB251210A (en) * | 1926-01-11 | 1926-04-29 | William Henry Graham Furnivall | Improvements in and relating to exhaust silencers |
GB291875A (en) * | 1927-03-10 | 1928-06-11 | Alfred James Ruane | Improvements in and relating to silencing devices for fluid pressure apparatus |
GB303581A (en) * | 1927-10-13 | 1929-01-10 | Joseph Frederick William Danby | Improvements in or relating to silencers for the exhaust of internal combustion engines |
US2499018A (en) * | 1948-01-26 | 1950-02-28 | Christiano Frank | Baffle type muffler with plural tubular passages |
US2950775A (en) * | 1958-01-13 | 1960-08-30 | Aro Equipment Corp | Exhaust noise reducing and air diffusing means for pneumatic motors |
US3137365A (en) * | 1962-07-09 | 1964-06-16 | Mead Specialties Company Inc | Muffler and method |
CH412377A (en) * | 1964-08-18 | 1966-04-30 | Ferdinand Meyer Fa | silencer |
-
1971
- 1971-08-04 US US168861A patent/US3698510A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1023225A (en) * | 1911-06-22 | 1912-04-16 | Mckenzie Cleland | Muffler for automobiles. |
GB242743A (en) * | 1924-09-29 | 1925-11-19 | Illtyd Idris Morgan | Improvements in silencers for internal combustion engines |
GB251210A (en) * | 1926-01-11 | 1926-04-29 | William Henry Graham Furnivall | Improvements in and relating to exhaust silencers |
GB291875A (en) * | 1927-03-10 | 1928-06-11 | Alfred James Ruane | Improvements in and relating to silencing devices for fluid pressure apparatus |
GB303581A (en) * | 1927-10-13 | 1929-01-10 | Joseph Frederick William Danby | Improvements in or relating to silencers for the exhaust of internal combustion engines |
US2499018A (en) * | 1948-01-26 | 1950-02-28 | Christiano Frank | Baffle type muffler with plural tubular passages |
US2950775A (en) * | 1958-01-13 | 1960-08-30 | Aro Equipment Corp | Exhaust noise reducing and air diffusing means for pneumatic motors |
US3137365A (en) * | 1962-07-09 | 1964-06-16 | Mead Specialties Company Inc | Muffler and method |
CH412377A (en) * | 1964-08-18 | 1966-04-30 | Ferdinand Meyer Fa | silencer |
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
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US3889776A (en) * | 1973-06-14 | 1975-06-17 | Sherritt Gordon Mines Ltd | Exhaust gas silencer |
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Legal Events
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AS | Assignment |
Owner name: ISI MANUFACTURING, INC., A MI CORP., MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BLATT, LELAND D. AND BLATT, ELAINE E., TRUSTEES OF THE L.F BLATT U/TA APRIL 12, 1977;REEL/FRAME:005002/0465 Effective date: 19880901 |