US3765505A - Noise suppressed venturi power unit - Google Patents

Noise suppressed venturi power unit Download PDF

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Publication number
US3765505A
US3765505A US00306540A US3765505DA US3765505A US 3765505 A US3765505 A US 3765505A US 00306540 A US00306540 A US 00306540A US 3765505D A US3765505D A US 3765505DA US 3765505 A US3765505 A US 3765505A
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US
United States
Prior art keywords
venturi
muffler
power unit
film
exhaust end
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
Application number
US00306540A
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English (en)
Inventor
F Pendleton
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.)
Vac-U-Max
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Vac-U-Max
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Filing date
Publication date
Application filed by Vac-U-Max filed Critical Vac-U-Max
Application granted granted Critical
Publication of US3765505A publication Critical patent/US3765505A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids

Definitions

  • ABSTRACT Apparatus are provided for suppression of noise in a venturi-type vacuum generating power unit by means of application of a resilient tubular extension to the exhaust end of the venturi and/or enveloping a portion
  • One such means involves affixing to the exhaust end of the venturi a resilient tubular extension which has been found to reduce the decibels generated by the venturi by a significant degree.
  • Another such means involves the application of a thin film of resilient plastic sheet material around a portion of the muffler normally used to surround the venturi, which also has been found to significantly reduce the noise level.
  • the structural modifications to achieve these reductions in noise level do not affect the operating characteristics of the equipment with respect to induced air flow (vacuum generation) and deadend vacuum, when compared to the same equipment in unmodified form.
  • FIG. 1 is an exploded view, in perspective showing the principal components of the invention.
  • FIG. 2 is an end view in elevation of the assembled components of FIG. 1 adapted for a side mounting.
  • FIG. 3 is a section taken along line 3-3 of FIG. 2.
  • FIG. 4 is a view in elevation of the other end of the assembled components shown in FIGS. 2 and 3.
  • element 1 generally refers to a mounting bracket supporting a housing 3 adapted to receive an orifice assembly 5 and venturi jet assembly 7.
  • the orifice assembly is of conventional design and connected to a source of high pressure air not shown in FIG. 1.
  • a tubular extension 9 of resilient material is mounted on the exhaust end of venturi 7 for noise suppression purposes.
  • Extension 9 may be constructed of a variety of flexible, resilient materials, preferably plastic materials such as polyvinyl chloride, natural or synthetic rubbers such as neoprene rubber and the like.
  • the wall thickness of the portion of the tubular extension 9 beyond the exhaust end of the venturi should preferably be about one-eighth to three-sixteenths inch.
  • the length of extension 9 projecting beyond the exhaust end of the venturi is preferably from about 2% inch to 2% inch, i.e. about 30 to 40 percent the length of the venturi 7 measured from the exhaust to intake ends of said venturi.
  • a cylindrical muffler 11 Spaced from the outer periphery of the venturi 7 and extension 9 is a cylindrical muffler 11 cmposed for example of fiberglass, advantageously fabricated from an air-permeable unsplit fiberglass pipe having a wall thickness of about one-third the inner diameter of cylinder 11.
  • the outer surface of the cylinder is surrounded by an air permeable cloth covering 13 constructed for example, of cheese cloth, cotton twill or moleskin to retain the fiberglass in place under the high pressure air exhausted by the venturi.
  • the end of cylinder 11 is sealed off by a disc 15 of fiberglass of similar thickness and having bonded to its inner face a film of plastic material or metal foil, such as aluminum foil 17 (as shown in FIG. 3) to prevent the jet of air exhausted by the venturi from disintegrating the fiberglass end wall 15 of the muffler 11. End wall 15 and film 17 are together suitably cemented to the end of cylinder 11 by methods well known in the art.
  • Beneath cloth covering 13 the outer periphery of the portion of cylinder 11 surrounding the exhaust end of the venturi 7 and extension 9 is enveloped by a film of resilient plastic material 19, such as polyethylene, polyvinylchloride and the like, preferably of about 0.010 inch in thickness.
  • the plastic envelope should extend at least from the end wall 15 of the muffler or cylinder 11 to envelope the region of extension 9 which generally covers up to about 50 percent of the length of cylinder 11, extending from end wall 15. More specifically, the plastic film 19 should extend from the end of the muffler 11 adjacent the exhaust end of venturi 7 and up to about 40 to 45 percent the length of said venturi measured from its exhaust to intake ends, overlying extension 9.
  • the plastic film 19 may be applied by winding a continuous strip of such material around cylinder 11; by surrounding the cylinder with overlapping sheet material; by sliding a tube of plastic material onto the cylinder, with our without an end wall suitably shaped to fit the outer end of the cylinder 11; or by other means which should be obvious from the description of this invention.
  • the envelope 19 of plastic sheet material before the cloth covering 13 is applied since the cloth will then retain the plastic firmly in place under the outwardly directed airpressure delivered by the exhaust end of the venturi.
  • the cloth covering over the plastic film 19 could be omitted or the plastic film could be applied over a portion of the cloth covering 13 provided that the plastic film is sufficiently snug when applied.
  • the cylindrical muffler 11 is preferably surrounded by a metal casing 21 provided with a perforated portion 23 to permit air to escape from the unit during operation.
  • Casing 21 slidably engages bracket 1 within channels 25 and is retained in place by a spring means 27.
  • FIGS. 2, 3 and 4 More detailed views of the assembled components appear in FIGS. 2, 3 and 4.
  • FIG. 3 there is shown an elevation view, partly in section, through the venturi 7, muffier 11 and casing 21 of this invention.
  • Extension 9 is advantageously affixed to the exhaust end of venturi 7 by means of a skirt portion 29 molded of the same material and coupled to the venturi by means of a threaded portion such as a bushing 31 suitably affixed thereto.
  • the skirt may also be coupled to the venturi by means of meshing rings and annular depressions between the two pieces.
  • high pressure air at a pressure of about 60 lbs. per square inch is introduced to the orifice assembly through a port 33 from which it is delivered through an adjustable needle valve in the orifice assembly to the intake of the venturi at about 35 cubic feet per minute standard atmospheric pressure. This generates an airflow of approximately 100 cubic feet per minute standard atmospheric pressure at the inlet 35 of the unit which is connected to various other equipment not shown.
  • FIGS. 2 and 4 Suitable mounting means are shown in FIGS. 2 and 4 for mounting the power unit in a side mounted position, but it should be apparent that the entire unit may be mounted in substantially any position.
  • a vacuum generating unit of the type described would normally generate sound levels of approximately 93 decibels.
  • the sound level generated by-the united was reduced to approximately 83 decibels.
  • the use of the extension 9 alone reduced the decibel rating to approximately 85.
  • the use of both extension 9 and the plastic wrapping 19 together reduced the decibel rating to 76 decibels.
  • a vacuum generating power unit having a -venturi actuated by a source of high pressure air and a muffler of air-permeable fiberglass surrounding said venturi, the improvement comprising a flexible, resilient tubular extension mounted on the exhaust end of said venturi and situated within the confines of said muffler, the end of said extension being spaced from the end of said muffler adjacent the exhaust end of said venturi.
  • a power unit according to claim 1 which is further provided with a film of resilient plastic material about the outer periphery of said fiberglass muffler extending from the end of said muffler adjacent the exhaust end of said venturi and overlying at least the said flexible resilient tubular extension.
  • a vacuum generating power unit having a venturi actuated by a source of high pressure air and a muffler of air-permeable fiberglass surrounding said venturi, the improvement comprising a film of resilient plastic material about the outer periphery of said fiberglass muffier extending from the end of said muffler adjacent the exhaust end of said venturi and overlying at least the exhaust end of said venturi.
  • a power unit according to claim 4 which is further provided with a flexible resilient tubular extension mounted on the exhaust end of the said venturi and ex tending beyond said end and situated within the confines of said muffier, said film of resilient plastic material overlying said extension.
  • a power unit according to claim 4 which is further provided with a cloth covering overlying said film of resilient plastic material and retaining said film in place.
  • a power unit according to claim 5 which is further provided with a cloth covering overlying said film of resilient plastic material and retaining said film in place.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Exhaust Silencers (AREA)
  • Air Transport Of Granular Materials (AREA)
US00306540A 1972-11-15 1972-11-15 Noise suppressed venturi power unit Expired - Lifetime US3765505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30654072A 1972-11-15 1972-11-15

Publications (1)

Publication Number Publication Date
US3765505A true US3765505A (en) 1973-10-16

Family

ID=23185749

Family Applications (1)

Application Number Title Priority Date Filing Date
US00306540A Expired - Lifetime US3765505A (en) 1972-11-15 1972-11-15 Noise suppressed venturi power unit

Country Status (5)

Country Link
US (1) US3765505A (enrdf_load_stackoverflow)
JP (1) JPS5651971B2 (enrdf_load_stackoverflow)
CA (1) CA981995A (enrdf_load_stackoverflow)
ES (1) ES419350A1 (enrdf_load_stackoverflow)
GB (1) GB1442171A (enrdf_load_stackoverflow)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056334A (en) * 1975-05-12 1977-11-01 Fortune William S Vacuum system
US4120616A (en) * 1975-10-06 1978-10-17 Breuer Electric Manufacturing Company Vacuum cleaner-blower assembly with sound absorbing arrangement
EP0149444A3 (de) * 1984-01-04 1988-01-07 VOEST-ALPINE Aktiengesellschaft Einrichtung zur Belüftung von Rottegut
WO2000038771A1 (en) * 1998-12-23 2000-07-06 Resmed Limited An apparatus for supplying breathable gas
US6135136A (en) * 1997-10-02 2000-10-24 Uview Ultraviolent Systems, Inc. System for draining and recovering coolant from a motor vehicle cooling system
US20110114389A1 (en) * 2008-06-30 2011-05-19 Harold Dean Mathena Ecologically sensitive mud-gas containment system
WO2012141691A1 (en) * 2011-04-12 2012-10-18 Harold Dean Mathena Shale-gas separating and cleanout system
CN103573590A (zh) * 2012-08-04 2014-02-12 任文华 风扇
US8671671B1 (en) * 2011-07-14 2014-03-18 Northern California Diagnostic Laboratories Exhaust system for an internal combustion engine
US8707689B1 (en) * 2011-07-14 2014-04-29 Northern California Diagnostic Laboratories, Inc. Exhaust system for an internal combustion engine
USD714174S1 (en) 2013-05-03 2014-09-30 Mathena, Inc. Portion of digital gauge
USD714175S1 (en) 2013-05-03 2014-09-30 Mathena, Inc. Portion of digital gauge
USD719519S1 (en) 2013-03-08 2014-12-16 Mathena, Inc. Drive over cable cover segment
WO2015188069A1 (en) * 2014-06-06 2015-12-10 Dayco Ip Holdings, Llc Noise attenuation in a venturi device and/or check valves
US9353586B2 (en) 2012-05-11 2016-05-31 Mathena, Inc. Control panel, and digital display units and sensors therefor
USD763414S1 (en) 2013-12-10 2016-08-09 Mathena, Inc. Fluid line drive-over
EP3055597A4 (en) * 2013-10-08 2017-06-07 Dayco IP Holdings, LLC Noise attenuation in a check valve unit or apparatus for producing vacuum
US10160913B2 (en) 2011-04-12 2018-12-25 Mathena, Inc. Shale-gas separating and cleanout system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50133101U (enrdf_load_stackoverflow) * 1974-04-17 1975-11-01
FI122673B (fi) * 2010-11-01 2012-05-15 Maricap Oy Menetelmä ja laitteisto pneumaattisessa materiaalinsiirtojärjestelmässä
FI123719B (fi) * 2012-03-21 2013-10-15 Maricap Oy Menetelmä ja laitteisto pneumaattisen jätteensiirtojärjestelmän ulospuhallusilman käsittelemiseksi

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2077024A (en) * 1934-09-12 1937-04-13 Tanner James Harmon Suction device
GB546890A (en) * 1942-02-16 1942-08-04 T & T Vicars Ltd An improved method and apparatus for the mixing of gas and air in burners
US2631774A (en) * 1948-03-18 1953-03-17 Ingersoll Rand Co Thermocompressor
US3468397A (en) * 1966-10-26 1969-09-23 Svenska Flaektfabriken Ab Gas ejector with built-in sound attenuating means

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061179A (en) * 1960-11-08 1962-10-30 Vac U Max Suction creating apparatus
JPS4428070Y1 (enrdf_load_stackoverflow) * 1966-08-19 1969-11-21
JPS4534023Y1 (enrdf_load_stackoverflow) * 1967-07-19 1970-12-25

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2077024A (en) * 1934-09-12 1937-04-13 Tanner James Harmon Suction device
GB546890A (en) * 1942-02-16 1942-08-04 T & T Vicars Ltd An improved method and apparatus for the mixing of gas and air in burners
US2631774A (en) * 1948-03-18 1953-03-17 Ingersoll Rand Co Thermocompressor
US3468397A (en) * 1966-10-26 1969-09-23 Svenska Flaektfabriken Ab Gas ejector with built-in sound attenuating means

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056334A (en) * 1975-05-12 1977-11-01 Fortune William S Vacuum system
US4120616A (en) * 1975-10-06 1978-10-17 Breuer Electric Manufacturing Company Vacuum cleaner-blower assembly with sound absorbing arrangement
EP0149444A3 (de) * 1984-01-04 1988-01-07 VOEST-ALPINE Aktiengesellschaft Einrichtung zur Belüftung von Rottegut
US6135136A (en) * 1997-10-02 2000-10-24 Uview Ultraviolent Systems, Inc. System for draining and recovering coolant from a motor vehicle cooling system
WO2000038771A1 (en) * 1998-12-23 2000-07-06 Resmed Limited An apparatus for supplying breathable gas
EP1140266A4 (en) * 1998-12-23 2009-05-06 Resmed Ltd DEVICE FOR SUPPLYING ATOMIBLE GAS
US20110114389A1 (en) * 2008-06-30 2011-05-19 Harold Dean Mathena Ecologically sensitive mud-gas containment system
US8641811B2 (en) 2008-06-30 2014-02-04 Mathena, Inc. Ecologically sensitive mud-gas containment system
WO2012141691A1 (en) * 2011-04-12 2012-10-18 Harold Dean Mathena Shale-gas separating and cleanout system
US10160913B2 (en) 2011-04-12 2018-12-25 Mathena, Inc. Shale-gas separating and cleanout system
CN103596697A (zh) * 2011-04-12 2014-02-19 马西纳有限公司 页岩气分离和清除系统
US8707689B1 (en) * 2011-07-14 2014-04-29 Northern California Diagnostic Laboratories, Inc. Exhaust system for an internal combustion engine
US8671671B1 (en) * 2011-07-14 2014-03-18 Northern California Diagnostic Laboratories Exhaust system for an internal combustion engine
US9353586B2 (en) 2012-05-11 2016-05-31 Mathena, Inc. Control panel, and digital display units and sensors therefor
CN103573590A (zh) * 2012-08-04 2014-02-12 任文华 风扇
USD719519S1 (en) 2013-03-08 2014-12-16 Mathena, Inc. Drive over cable cover segment
USD714175S1 (en) 2013-05-03 2014-09-30 Mathena, Inc. Portion of digital gauge
USD714174S1 (en) 2013-05-03 2014-09-30 Mathena, Inc. Portion of digital gauge
EP3055597A4 (en) * 2013-10-08 2017-06-07 Dayco IP Holdings, LLC Noise attenuation in a check valve unit or apparatus for producing vacuum
USD763414S1 (en) 2013-12-10 2016-08-09 Mathena, Inc. Fluid line drive-over
WO2015188069A1 (en) * 2014-06-06 2015-12-10 Dayco Ip Holdings, Llc Noise attenuation in a venturi device and/or check valves
CN105378240A (zh) * 2014-06-06 2016-03-02 戴科知识产权控股有限责任公司 文丘里装置和/或止回阀中的噪声衰减
EP3152417A4 (en) * 2014-06-06 2018-05-23 Dayco IP Holdings, LLC Noise attenuation in a venturi device and/or check valves
CN105378240B (zh) * 2014-06-06 2018-10-09 戴科知识产权控股有限责任公司 文丘里装置和/或止回阀中的噪声衰减
US10519984B2 (en) 2014-06-06 2019-12-31 Dayco Ip Holdings, Llc Noise attenuation in a Venturi device and/or check valves

Also Published As

Publication number Publication date
JPS5651971B2 (enrdf_load_stackoverflow) 1981-12-09
CA981995A (en) 1976-01-20
GB1442171A (en) 1976-07-07
ES419350A1 (es) 1976-03-01
JPS4977373A (enrdf_load_stackoverflow) 1974-07-25

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