EP0184024A1 - Deflecting cowl - Google Patents

Deflecting cowl Download PDF

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Publication number
EP0184024A1
EP0184024A1 EP85114276A EP85114276A EP0184024A1 EP 0184024 A1 EP0184024 A1 EP 0184024A1 EP 85114276 A EP85114276 A EP 85114276A EP 85114276 A EP85114276 A EP 85114276A EP 0184024 A1 EP0184024 A1 EP 0184024A1
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EP
European Patent Office
Prior art keywords
inner body
outer jacket
section
cross
openings
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.)
Granted
Application number
EP85114276A
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German (de)
French (fr)
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EP0184024B1 (en
Inventor
Hans Ludwig
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.)
HEINRICH BRINKMANN ANLAGENVERPACHTUNG GmbH and Co KG
Original Assignee
HEINRICH BRINKMANN ANLAGENVERPACHTUNG GmbH and Co KG
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 HEINRICH BRINKMANN ANLAGENVERPACHTUNG GmbH and Co KG filed Critical HEINRICH BRINKMANN ANLAGENVERPACHTUNG GmbH and Co KG
Priority to AT85114276T priority Critical patent/ATE32257T1/en
Publication of EP0184024A1 publication Critical patent/EP0184024A1/en
Application granted granted Critical
Publication of EP0184024B1 publication Critical patent/EP0184024B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/14—Draining devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues

Definitions

  • the invention relates to a deflector hood for fireplaces, in particular for the exhaust air lines of industrial suction systems for digestors or the like. Consisting of an opening from two openings into an outer jacket with t lere, located between the openings, as an attachment to the exhaust air line and one held in the outer casing, the inner body continuously widening from the base surface against the outflow opening, the interior space of which is open towards the outflow opening in the region of the base surface is connected to the surroundings by means of a channel guided through the wall of the outer casing.
  • Deflector hoods of this type serve to prevent rainwater from entering the exhaust air duct and thus to protect it against the flow impairment caused by moisture ingress, which in conventional fireplaces takes the form, for example, of a reduction in suction or even undesirable sooting, in industrial exhaust air ducts, especially exhaust air ducts of digestors in the form of other, depending on the type of system different disturbances can occur.
  • the well-known deflector hoods fulfill the intended task to your complete satisfaction, but on the other hand they represent obstacles that cause considerable flow resistance, which can be achieved by maintaining a correspondingly increased exhaust gas temperature. a correspondingly increased fan output must be compensated.
  • the present invention has for its object to provide a deflector hood with a reduced flow resistance and the invention is that the réelleör by a corresponding to the outer jacket, expanding in such a way up to the middle level and then narrowing again to the outflow opening that the annular space enclosed between the outer jacket and the inner body has a cross section which increases continuously from the inflow cross section to the outflow cross section.
  • the invention provides a deflector hood with diffuser properties which opposes the flowing medium with a flow resistance which is substantially reduced in comparison with the known deflector hoods.
  • investigations have shown that the point of reversal in the case of the deflector hood according to the invention, at which the positive static pressure changes into a negative static pressure, is still inside the hood, so that with the aid of the deflector hood according to the invention, compared to the known hoods, it is essential more compact construction a "pressure recovery" improving the draft in the exhaust air duct is achieved.
  • the use of much less powerful fans is, for example, in the case of exhaust air pipes carrying cold gases.
  • chimneys carrying hot gases for example chimneys for boiler systems, the system can be regulated to a considerably lower exhaust gas temperature.
  • Significant energy savings can thus be achieved by using the deflector hood according to the invention.
  • the The inner space of the inner body is led through the outer wall of the outer jacket (liquid) drainage from the side surface of the inner body and has the shape of a support.
  • the base surface of the inner body pointing in the direction of the inflowing gases can be given a rounded, tapered and therefore aerodynamically favorable shape, whereby the (water) drainage channel can also be given a streamlined profile. In this way - as measurements have shown - reduced drag coefficients in the detector or hood can be achieved down to a value of 0.64 and below.
  • the deflector hood shown in the drawing for the exhaust air duct of a suction system for digestors consists of an outer jacket 3 widening from both openings 1, 2 to a central plane A located between the openings as an attachment to the exhaust air duct and one held in the outer jacket 3, inner body 5 which widens continuously from the base 4 in the direction of the outflow opening 1, the interior space of which is open towards the outflow opening and is connected to the surroundings in the region of the base area by means of a channel 6 which is guided through the wall of the outer casing 3.
  • the inner body has an ent speaking the outer shell 3, expanding in this way up to the middle plane A and then narrowing in the direction of the outflow opening 1 that the between the outer shell 3 and the inner body 5th enclosed annular space 7 has a cross section which increases continuously from the inflow cross section 2 to the outflow cross section 1.
  • the ring channel in plane B has a cross-section of 0.036 m ', in plane A a cross-section of 0.037 m 'and in the plane C a cross section of 0.046 m'.
  • the outflow cross section 1 with a diameter of 240 mm is 0.452 m '.
  • the drainage of collected rainwater channel 6 starts from the side surface and not centrally from the tip of the inner body - as in the known designs of a deflector hood - and is designed wing-like, so that the deflector hood as a whole has an extraordinarily aerodynamic shape and thus offers virtually no flow resistance to the inflowing gases.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Outer Garments And Coats (AREA)

Abstract

Deflector hood for chimneys, in particular for the air exhaust lines of industrial exhaust installations such as digestors or the like, made up of an outer jacket expanding from two opposing openings to a center plane located between the openings. The hood acts as a cap on the air exhaust line. An inner body is held within the outer jacket and expands continuously from the base surface toward the outlet opening. The internal space is open toward the outlet opening and is connected with the environment by a channel leading through the wall of the outer jacket. The inner body has a configuration corresponding to that of the outer jacket, expanding from the inlet opening to a center plane and subsequently narrowing to the outlet opening, such that the annular space enclosed between the outer jacket and the inner body has a cross-sectional area continuously increasing from the inlet cross-section to the outlet cross-section. The channel connecting the internal space of the inner body with the environment and serves to drain off liquids. The channel originates at a lateral surface of the inner body and is in the form of a bearing surface.

Description

Die Erfindung betrifft eine Deflektorhaube für Kamine, insbesondere für die Fortluftleitungen von industriellen Absaugeanlagen für Digestoren oder dergl., bestehend aus einem sich von beiden Öffnungen bis in eine mit t lere, zwischen den Off nungen gelegene Ebene erweiternden Außenmantel als Aufsatz auf die Fortluftleitung und einem in dem Außenmantel gehaltenen, sich von der Basisfläche gegen die Abströmöffnung kontinuierlich erweiternden lnnenkörper, dessen gegen die Abströmöffnung offener Innenraum im Bereich der Basisf läche mittels eines durch die Wandung des Außenmantels geführten Kanals mit der Umgebung verbunden ist.The invention relates to a deflector hood for fireplaces, in particular for the exhaust air lines of industrial suction systems for digestors or the like. Consisting of an opening from two openings into an outer jacket with t lere, located between the openings, as an attachment to the exhaust air line and one held in the outer casing, the inner body continuously widening from the base surface against the outflow opening, the interior space of which is open towards the outflow opening in the region of the base surface is connected to the surroundings by means of a channel guided through the wall of the outer casing.

Deflektorhauben dieser Art dienen der Verhinderung des Eindringens von Regenwasser in die Fortluftleitung und damit zu dessen Schutz gegen die durch Feuchtigkeitszutritt verursachten Beeinträchtigung der Strömung, die in üblichen Kaminen etwa in Form einer Erniedrigung des Saugzuges oder gar einer unerwünschten Versottung, in industriellen fortluftleitungen, insbesondere Fortluftleitungen von Digestoren in Form anderer, je nach Art der Anlage unterschiedlicher Störungen auftreten können. Die bekannten Deflektorhauben erfüllen insoweit die Ihnen zugedachte Aufgabe zur vollsten Zufriedenheit, stellen jedoch auf der anderen Seite Hindernisse dar, die einen erheblichen Strömungswiderstand verursachen, der durch Erhaltung einer entsprechend erhöhten Abgastemperatur bezw. einer entsprechend erhöhten Ventilatorleistung ausgeglichen werden muß.Deflector hoods of this type serve to prevent rainwater from entering the exhaust air duct and thus to protect it against the flow impairment caused by moisture ingress, which in conventional fireplaces takes the form, for example, of a reduction in suction or even undesirable sooting, in industrial exhaust air ducts, especially exhaust air ducts of digestors in the form of other, depending on the type of system different disturbances can occur. The well-known deflector hoods fulfill the intended task to your complete satisfaction, but on the other hand they represent obstacles that cause considerable flow resistance, which can be achieved by maintaining a correspondingly increased exhaust gas temperature. a correspondingly increased fan output must be compensated.

Der vorliegenden Erfindung liegt als Aufgabe die Schaffung einer Deflektorhaube mit einem verminderten Strömungswiderstand zugrunde und die Erfindung besteht darin, daß der Innenör per eine dem Außenmantel entsprechende, sich derart bis zu der mittleren Ebene erweiternde und sich anschließend bis zur Abströmöffnung wiederum verengende Form besitzt, daß der zwischen dem Außenmantel und dem Innenkörper eingeschlossene Ringraum einen sich vom Zuströmquerschnitt bis zum Abströmquerschnitt kontinuierlich vergrößernden Querschnitt aufweist.The present invention has for its object to provide a deflector hood with a reduced flow resistance and the invention is that the Innenör by a corresponding to the outer jacket, expanding in such a way up to the middle level and then narrowing again to the outflow opening that the annular space enclosed between the outer jacket and the inner body has a cross section which increases continuously from the inflow cross section to the outflow cross section.

Durch die Erfindung ist eine Deflektorhaube mit Diffusoreigenschaften geschaffen, die dem strömenden Medium einen im Vergleich zu den bekannten Deflektorhauben wesentlich verminderten Strömungswiderstand entgegensetzt. Es haben im Gegenteil Untersuchungen ergeben, daß der bei der erfindungsgemäßen Defektorhaube der Umkehrpunkt, an dem der positive statische Druck in einen negativen statischen Druck übergeht, noch innerhalb der Haube liegt, so daß mit Hilfe der erfindungsgemäβen Deflektorhaube bei - gegenüber den bekannten Hauben - wesentlich gedrungenerer Bauweise ein den Zug in der Fortluftleitung verbessernder "Druck-Rückgewinn" erzielt wird. In diesem Sinne ist etwa bei kalte Gase führenden Fortluftleitungen der Einsatz von wesentlich leistungsschwächeren Ventilatoren bezw. bei heiße Gase führenden Kaminen, beispielsweise Kaminen für Kesselanlagen die Regelung der Anlage auf eine erheblich niedrigere Abgastemperatur möglich. Es kann somit durch den Einsatz der erfindungsgemäßen Deflektorhaube eine nennenswerte Energieeinsparung erzielt werden.The invention provides a deflector hood with diffuser properties which opposes the flowing medium with a flow resistance which is substantially reduced in comparison with the known deflector hoods. On the contrary, investigations have shown that the point of reversal in the case of the deflector hood according to the invention, at which the positive static pressure changes into a negative static pressure, is still inside the hood, so that with the aid of the deflector hood according to the invention, compared to the known hoods, it is essential more compact construction a "pressure recovery" improving the draft in the exhaust air duct is achieved. In this sense, the use of much less powerful fans is, for example, in the case of exhaust air pipes carrying cold gases. In the case of chimneys carrying hot gases, for example chimneys for boiler systems, the system can be regulated to a considerably lower exhaust gas temperature. Significant energy savings can thus be achieved by using the deflector hood according to the invention.

In einer vorteilhaften Ausführungsform der Erfindung kann die von dem lnnenraum des Innenkörpers durch die Außenwandung des Außenmantels geführte (Flussigkeits-)Ableitung von der Seitenfläche des Innenkörpers ausgehen und Tragf lächonform besitzen. Durch die Anstellung der FlüssigkeiLsableitung an der Seitenfläche des Innenkörpers kann die in Richtung der zuströmenden Gase weisende Basisfläche des Innenkörpers eine abgerundetspitz zulaufende und damit strömungstechnisch günstige Form erhalten, wobei der (Wasser)-Ableit ungskanal ebenfalls eine strömungsgünstige Profilierung erhalten kann. Is können auf diese Weise - wie Messungen ergeben haben - bis auf einen Wert von 0,64 und darunter verringerte Luftwiderstandsbeiwerte in der Delekt or haube erzielt werden.In an advantageous embodiment of the invention, the The inner space of the inner body is led through the outer wall of the outer jacket (liquid) drainage from the side surface of the inner body and has the shape of a support. By adjusting the liquid drainage on the side surface of the inner body, the base surface of the inner body pointing in the direction of the inflowing gases can be given a rounded, tapered and therefore aerodynamically favorable shape, whereby the (water) drainage channel can also be given a streamlined profile. In this way - as measurements have shown - reduced drag coefficients in the detector or hood can be achieved down to a value of 0.64 and below.

Die Erfindung ist in der Zeichnung anhand eines Ausführungsbeispieles er läutert.The invention is illustrated in the drawing using an exemplary embodiment.

Die in der Zeichnung wiedergegebene Deflektorhaube für die Fortluftleitung einer Absaugeanlage für Digestoren besteht aus einem sich von beiden Öffnungen 1, 2 bis in eine mittlere, zwischen den Öffnungen gelegene Ebene A erweiternden Außenmantel 3 als Aufsatz auf die Fortluftleitung und einem in dem Außenmantel 3 gehaltenen, sich von der Basis 4 in Richtung auf die Abströmölfnung 1 kontinuierlich erweiternden Innenkörper 5, dessen gegen die Abströmöffnung offener Innenraum im Bereich der Basisfläche mittels eines durch die Wandung des Außenmantels 3 geführten Kanals 6 mit der Umgebung verbunden ist. Der Innenkorper eine dem Außenmantel 3 ent sprechende, sich derart bis zu der mittleren Ebene A erweiternde und sich anschleßend in Richtung auf die Abströmöffnung 1 wiederum verengende Form besitzt, daß der zwischen dem Außenmantel 3 und dem Innenkörper 5 eingeschlossene Ringraum 7 einen sich vom Zuströmquerschnitt 2 bis zum Abströmquerschnitt 1 kontinuierlich vergrößernden Querschnitt aufweist. Geht man in diesem Sinne davon aus, daß der Durchmesser des Zuströmquerschnittes 2 194 mm und damit der Querschnitt 0,0295 m2 beträgt, so weist der Ringkanal in der Ebene B einen Querschnitt von 0,036 m', in der Ebene A einen Querschnitt von 0,037 m' und in der Ebene C einen Querschnitt von 0,046 m' auf. Der Abströmquerschnitt 1 beträgt bei einem Durchmesser von 240 mm 0,452 m'.The deflector hood shown in the drawing for the exhaust air duct of a suction system for digestors consists of an outer jacket 3 widening from both openings 1, 2 to a central plane A located between the openings as an attachment to the exhaust air duct and one held in the outer jacket 3, inner body 5 which widens continuously from the base 4 in the direction of the outflow opening 1, the interior space of which is open towards the outflow opening and is connected to the surroundings in the region of the base area by means of a channel 6 which is guided through the wall of the outer casing 3. The inner body has an ent speaking the outer shell 3, expanding in this way up to the middle plane A and then narrowing in the direction of the outflow opening 1 that the between the outer shell 3 and the inner body 5th enclosed annular space 7 has a cross section which increases continuously from the inflow cross section 2 to the outflow cross section 1. If one assumes in this sense that the diameter of the inflow cross-section is 2 194 mm and thus the cross-section is 0.0295 m 2 , the ring channel in plane B has a cross-section of 0.036 m ', in plane A a cross-section of 0.037 m 'and in the plane C a cross section of 0.046 m'. The outflow cross section 1 with a diameter of 240 mm is 0.452 m '.

Der aus dem Innern des Innenkörpers durch die Wandung des Außenmantels geführte, der Ableitung von aufgefangenem Regenwasser dienende Kanal 6 geht von der Seitenfläche und nicht zentral von der Spitze des Innenkörpers - wie bei den bekannten Ausführungen einer Deflektorhaube - aus und ist tragflächenartig gestaltet, so daß die Deflektorhaube insgesamt eine außerordentlich strömungsgünstige Form aufweist und damit den aufströmenden Gasen nahezu keinen Strömungswiderstand entgegensetzt.The from the inside of the inner body through the wall of the outer jacket, the drainage of collected rainwater channel 6 starts from the side surface and not centrally from the tip of the inner body - as in the known designs of a deflector hood - and is designed wing-like, so that the deflector hood as a whole has an extraordinarily aerodynamic shape and thus offers virtually no flow resistance to the inflowing gases.

Claims (2)

1. Deflektorhaube für Kamine, insbesondere für die Fortluftleitungen von industriellen Absaugeanlagen für Digestoren oder dergl., bestehend aus einem sich von beiden Öffnungen bis in eine mittlere, zwischen den Öffnungen gelegene Ebene erweiternden Außenmantel als Aufsatz auf die Fortluftleitung und einem in dem Außenmantel gehaltenen, sich von der Basisfläche gegen die Abströmöffnung kontinuierlich erweiternden Innenkörper, dessen gegen die Abströmöffnung offener Innenraum im Bereich der Basisfläche mittels eines durch die Wandung des Außenmantels geführten Kanals mit der Umgebung verbunden ist, dadurch gekennzeichnet, daß der Innenörper (4) eine dem Außenmantel (3) entsprechende, sich derart bis zu der mittleren Ebene (A) erweiternde und sich anschließend bis zur Abströmöffnung wiederum verengende Form besitzt, daß der zwi.schen dem Außenmantel und dem Innenkörper eingeschlossene Ringraum (7) einen sich vom Zuströmquerschnitt (2) bis zum Abströmquerschnitt (I) kontinuierlich vergrößernden Querschnitt aufweist.1. deflector hood for chimneys, in particular for the exhaust air ducts of industrial suction systems for digestors or the like, consisting of an outer jacket which widens from both openings to a middle level between the openings as an attachment to the exhaust air duct and a held in the outer jacket, inner body continuously widening from the base surface against the outflow opening, the interior space of which is open towards the outflow opening and is connected to the surroundings in the region of the base surface by means of a channel guided through the wall of the outer shell, characterized in that the inner body (4) has an outer shell (3 ) has a corresponding shape, which widens to the middle level (A) and then narrows again to the outflow opening, such that the annular space (7) enclosed between the outer jacket and the inner body has a shape from the inflow cross section (2) to the outflow cross section (I) continuously enlarged cross-section. 2. Deflektorhaube nach Anspruch 1, dadurch gekennzeichnet, daß der den zeichnet, daß der den Innentaum des Innenkörpers (5) mit der Umgebung verbindende, der Flüssigkeitsableit ung dienende Kanal (6) von der Seitenfläche des Innenkörpers ausgeht und Tragflächenform besitzt.2. deflector hood according to claim 1, characterized in that the is characterized in that the inner space of the inner body (5) connecting with the environment, the liquid discharge duct serving channel (6) starts from the side surface of the inner body and has wing shape.
EP85114276A 1984-11-22 1985-11-08 Deflecting cowl Expired EP0184024B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85114276T ATE32257T1 (en) 1984-11-22 1985-11-08 DEFLECTOR HOOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843442588 DE3442588A1 (en) 1984-11-22 1984-11-22 DEFLECTOR HOOD
DE3442588 1984-11-22

Publications (2)

Publication Number Publication Date
EP0184024A1 true EP0184024A1 (en) 1986-06-11
EP0184024B1 EP0184024B1 (en) 1988-01-27

Family

ID=6250878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114276A Expired EP0184024B1 (en) 1984-11-22 1985-11-08 Deflecting cowl

Country Status (5)

Country Link
US (1) US4655121A (en)
EP (1) EP0184024B1 (en)
JP (2) JPS61252427A (en)
AT (1) ATE32257T1 (en)
DE (1) DE3442588A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005472C2 (en) * 1997-03-07 1998-09-18 Muelink & Grol Bv Cowl and flue for combustion chimney

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127247C2 (en) * 1991-08-17 1995-02-23 Beck Klaus Lizenzverwaltung Rain repellent diffuser hood
US20050159101A1 (en) * 2004-01-20 2005-07-21 Hrdina Terry L. Pivotal direct drive motor for exhaust assembly
US7682231B2 (en) 2004-01-20 2010-03-23 Greenheck Fan Corporation Exhaust fan assembly
CA2493651C (en) * 2004-01-20 2014-05-20 Greenheck Fan Corporation Exhaust fan assembly having a windband
US7320636B2 (en) * 2004-01-20 2008-01-22 Greenheck Fan Corporation Exhaust fan assembly having flexible coupling
US7547249B2 (en) * 2004-07-15 2009-06-16 Greenheck Fan Corporation Exhaust fan assembly having H-out nozzle
US20070125361A1 (en) * 2005-12-02 2007-06-07 Black Bailey J Jr Vent cap assembly
US7458888B2 (en) * 2007-02-27 2008-12-02 Huta Robert M Chimney termination cap
US20100285730A1 (en) * 2009-05-11 2010-11-11 Minel Kupferberg High velocity nozzle and windband assembly
US11274825B2 (en) * 2016-07-13 2022-03-15 Uchicago Argonne, Llc Passive and no-loss weather cap for protection of wind induced downdraft in sensitive exhaust systems

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE812690C (en) * 1949-03-22 1951-09-03 Walther & Cie Ag Chimney top
FR1008110A (en) * 1950-01-09 1952-05-14 Chimney cap
DE1009383B (en) * 1952-07-04 1957-05-29 Barmer Eisen Und Blechwarenfab Fixed ventilation attachment open on top
DE2607712A1 (en) * 1976-02-25 1977-09-08 Hans Schwarz Ohg Fireplace waste air mixing hood - has internal shallow funnel within truncated conical hood for mixing

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Publication number Priority date Publication date Assignee Title
US45403A (en) * 1864-12-13 Improved chimney-top
US1097487A (en) * 1913-10-21 1914-05-19 Benjamin H Van Auken Ventilating-cowl.
US1986176A (en) * 1933-03-18 1935-01-01 Zwerling Harry Ventilator
DE1842397U (en) * 1961-09-18 1961-11-30 Erhard Muhr ROOF FOR EXHAUST GASES.
DE1863687U (en) * 1962-10-13 1962-12-13 Mestrup & Co LIFTING EXHAUST HOOD.
NL7902095A (en) * 1979-03-16 1980-09-18 Willem Jacobus Kleijn Chimney cowl concentric flow cones - permit constant passage between them, inner cone top having ejector surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE812690C (en) * 1949-03-22 1951-09-03 Walther & Cie Ag Chimney top
FR1008110A (en) * 1950-01-09 1952-05-14 Chimney cap
DE1009383B (en) * 1952-07-04 1957-05-29 Barmer Eisen Und Blechwarenfab Fixed ventilation attachment open on top
DE2607712A1 (en) * 1976-02-25 1977-09-08 Hans Schwarz Ohg Fireplace waste air mixing hood - has internal shallow funnel within truncated conical hood for mixing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1005472C2 (en) * 1997-03-07 1998-09-18 Muelink & Grol Bv Cowl and flue for combustion chimney

Also Published As

Publication number Publication date
ATE32257T1 (en) 1988-02-15
DE3442588C2 (en) 1992-05-21
JPH0379034U (en) 1991-08-12
DE3442588A1 (en) 1986-05-22
JPS61252427A (en) 1986-11-10
US4655121A (en) 1987-04-07
EP0184024B1 (en) 1988-01-27

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