EP0154089A2 - Damper - Google Patents
Damper Download PDFInfo
- Publication number
- EP0154089A2 EP0154089A2 EP84308474A EP84308474A EP0154089A2 EP 0154089 A2 EP0154089 A2 EP 0154089A2 EP 84308474 A EP84308474 A EP 84308474A EP 84308474 A EP84308474 A EP 84308474A EP 0154089 A2 EP0154089 A2 EP 0154089A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- blades
- operating member
- control apparatus
- gear teeth
- pinion
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/12—Hinged dampers
- A62C2/14—Hinged dampers with two or more blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
- F24F11/35—Responding to malfunctions or emergencies to fire, excessive heat or smoke by closing air passages
Definitions
- This invention relates to control apparatus such as fire dampers or duct dampers and more particularly to fire dampers or duct dampers provided with movable blades for controlling the flow of air or other gases therethrough.
- Such fire dampers or duct dampers having movable blades are usually adapted to be mounted in ventilation ducts or ventilation apertures in, for example, walls and movement of the blades between an open and closed position enables the flow of air or other gases through the fire damper or duct damper to be controlled. It is also known to provide means for closing the blades in the event of a fire to prevent smoke or noxious fumes passing therethrough in order, for example, to restrict or to avoid the spread of smoke or fumes through the ventilation ducting of a building.
- the blades are pivotally mounted in a housing and extend transversely thereof.
- the blades are drivably interconnected by a train of gears so that the blades pivot in unison.
- this known type of fire damper suffers from the disadvantages that utilisation of a train of gears as the drivable interconnection between the blades requires major alterations to be made to the gear train in order to provide alternative parallel to opposed blade movement.
- parallel blade movement consists of movement of adjacent blades in the same direction of rotation about their pivotal axes and opposed blade movement consists of movement of adjacent blades in opposite directions of rotation.
- the utilisation of a drivable interconnection in the form of a train of gears results in an operating member controlling movement and positioning of the blades having a rotary movement which makes it difficult to accurately control the positioning of the operating member and thus the positioning of the blades drivably connected thereto, and the object of this invention is to provide control apparatus such as a fire damper or duct damper in which the above disadvantages are wholly or partly alleviated.
- control apparatus comprises a housing having two or more blades pivotally mounted therein and extending transversely thereof, and operating means drivably interconnected to the blades to produce pivotal movement of the blades in unison, wherein the operating means includes an operating member which is linearly movable.
- the operating means comprises gear pinions mounted on the blades which drivably engage the gear teeth of a rack formed on the operating member.
- each gear pinion is disposed in an aperture formed in the operating member and the gear teeth of the rack which drivably engage the pinion are formed on one side of the'aperture.
- Each pinion is, preferably, provided with gear teeth on only a part of the circumference thereof and the remaining portion of the circumference is a close fit with the other side of the aperture to retain the gear teeth on the pinion in engagement with the gear teeth of the rack.
- the gear teeth of the rack which engage the gear pinion associated with one blade are disposed on the opposite side of the aperture in the operating member to the gear teeth of the rack which engage the gear pinion associated with the adjacent blade so that adjacent blades move in opposite directions of rotation.
- the gear teeth of the rack which engage the gear pinion associated with one blade may be disposed on the same side of the aperture in the operating member to the gear teeth of the rack which engage the gear pinion associated with the adjacent blade so that adjacent blades move in the same directions of rotation.
- the pivotal axes of the blades are disposed in a single plane and the operating member is slidably mounted in the housing for linear movement in a direction parallel to said single plane.
- resilient means is provided for urging the blades towards a closed position in which adjacent blades are aligned in touching contact with each other.
- the resilient means preferably, comprises one or more springs extending between the operating member and the housing.
- automatic closure means is drivably connected to the operating member via a rack and pinion drive for automatically urging the blades towards their closed position.
- the automatic closure means preferably, includes a smoke or heat detector which initiates closing movement of the blades when the presence of smoke or excessive heat is detected.
- an operating handle is connected to the operating member to enable the position of the blades to be manually controlled.
- a power-operated actuator is connected to the operating member to control the position of the blades.
- ad justable stop means associated with the operating member is provided to enable the position, such as the closed position, of the blades to be adjusted.
- Switch means associated with and operated by movement of the operating member relatively to the housing is, preferably, provided for enabling an indication of the position of the blades to be obtained.
- a fire damper or duct damper which is adapted to be mounted in ventilation ducts or ventilation apertures in walls of buildings comprises a substantiallly rectangular housing 10 having four blades 12 extending transversely thereof.
- Each blade 12 is provided with an integral central shaft 14 which is journalled at its ends in the sides of the housing 10 so that the blades 12 are pivotally movable relatively to the housing 10 between an open position (not shown) in which the blades 12 extend perpendicularly to the plane of the housing 10 and a closed position (shown in Figure 1 of the drawings) in which the blades 12 extend parallel to the plane of the housing 10 and engage in touching contact to prevent or restrict the passage of smoke or noxious gases through the housing 10 and the ducting or aperture (not shown) in which the fire damper or duct damper is mounted.
- a gear pinion 16 is secured on the portion of each shaft 14 which projects from one side of the housing 10 and the pinion 16 is provided with gear teeth on part of the circumference thereof which teeth mesh with the gear teeth of a rack 18 formed on a side of an associated elongate substantially rectangular aperture 20 in an operating member 22.
- the portion of the circumference of each gear pinion 16 which is provided with gear teeth is arranged to be sufficient to effect pivotal movement of the associated blade 12 between the open and closed position..
- the remaining portion of the circumference of each pinion 16 is a close fit with the other side of the aperture 20 to retain the gear teeth on the pinion 16 in engagement with the gear teeth of the rack 18.
- the operating member 11 is slidably mounted in guides 24 formed on the housing 10 and is constrained to move linearly in a direction parallel to a plane containing the pivotal axes of the blades 12.
- each pinion 16 which is devoid of gear teeth and which is a close fit with said other side of the associated aperture 20 in the operating member 22 can also be provided with a groove in which the operating member 22 is a sliding fit.
- Such grooves in the pinion 16 constitute guides for the operating member 22 and can be used to replace the guides 24.
- two helical tension springs 26 are connected between mounting points on the operating member 22 and the housing 10 so as to urge the operating member 22 so that the blades 12 are urged towards their closed position in which they are aligned in touching contact with each other to prevent or restrict the flow of smoke or gases through the housing 10.
- An operating handle 28 is pivotally mounted--on the housing 10 and is located between two pins 30 mounted on the operating member 22 so that movement of the handle 28 produces corresponding- movement of the operating member 22 against the action of the springs 26 to rotate the blades 12 to an open position (not shown).
- the operating member 22 is provided with a stop 32 extending from one side thereof.
- An adjustable screw jack 34 is mounted on the housing 10 so as to engage the stop 32 and provide a positive limit to movement of the operating member 22. It will be appreciated that this stop 32 and screw jack 34 enable not only the closed position of the blades 12 to be determined but also enable the closing of the blades 12 to be preset at any desired position so as to allow a predetermined volume of air flow therethrough.
- the same stop 32 or a similar stop can be utilised to actuate two micro switches 36 mounted on the housing 10 so that a remote visual indication of the position of the blades can be obtained so that it can easily be determined whether the blades 12 are, for example, in their open or closed position.
- the aperture 20 at the lower end of the operating member 22 is of extended length and the rack 18 formed on the side thereof is also of extended length and engages in mesh with a further pinion 38 mounted on a shaft 40 journalled in an extension 42 of the housing 10.
- the shaft 40 is constrained against endwise movement by means of two circlips 43 disposed on each side of the extension 42.
- the shaft 40 is also provided with a spiral groove 44 and a pin 46 is adapted to engage in the groove so that sliding movement of the pin 46 produces rotation of the shaft 40, the pinion 38 and movement of the operating member 22 and the blades 12 in the housing 10.
- the pin 46 is mounted in a cylinder 48 which is slidable in the bore of a boss 50 of the extension 42.
- a helical compression spring 52 is confined endwise between the boss 50 and an enlarged diameter portion 54 of the cylinder 48.
- the end face of the enlarged diameter portion 54 of the cylinder 48 is engaged by a piston 56 extending from a cylinder 58 containing wax and an electrical heating element 60 is wound around the external surface of the cylinder 58.
- a smoke detection device detects the presence of smoke or a temperature sensing device (not shown) detects excessive heat indicating a fire
- the electrical heating element 60 heats the wax in the cylinder 58 and moves the piston 56 towards the pinion 38.
- the cylinder 48 is thus moved against the action of the spring 52 towards the pinion 38 and the movement of the pin 46 in the spiral groove 44 produces rotation of the shaft 40 urging the blades 12 towards their closed position. If the smoke or excessive heat detected do not persist, and the signal to the electrical heating element 16 is removed the piston 56 retracts into the cylinder 58 under the action of the spring 52 and the corresponding movement of the pin 46 in the spiral groove 44 produces rotation of the shaft 40 to return the blades 12 to their open position.
- a spring loaded plunger indicated generally at 62 mounted in the boss 50 of the extension 42 extends through an aperture in the cylinder 48 and prevents sliding movement thereof under the action of the spring 52 so that the blades 12 are retained in their closed position until the spring loaded plunger is manually withdrawn to reset the automatic closure means.
- the operating member 22 is connected to a linear actuator (not shown) mounted on the housing 10 which effects sliding movement of the operating member 22 to open and close the blades of the fire damper or duct damper or to adjust the position thereof.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air-Flow Control Members (AREA)
Abstract
Description
- This invention relates to control apparatus such as fire dampers or duct dampers and more particularly to fire dampers or duct dampers provided with movable blades for controlling the flow of air or other gases therethrough.
- Such fire dampers or duct dampers having movable blades are usually adapted to be mounted in ventilation ducts or ventilation apertures in, for example, walls and movement of the blades between an open and closed position enables the flow of air or other gases through the fire damper or duct damper to be controlled. It is also known to provide means for closing the blades in the event of a fire to prevent smoke or noxious fumes passing therethrough in order, for example, to restrict or to avoid the spread of smoke or fumes through the ventilation ducting of a building.
- In one known type of fire damper or duct damper having movable blades, the blades are pivotally mounted in a housing and extend transversely thereof. The blades are drivably interconnected by a train of gears so that the blades pivot in unison. However, this known type of fire damper suffers from the disadvantages that utilisation of a train of gears as the drivable interconnection between the blades requires major alterations to be made to the gear train in order to provide alternative parallel to opposed blade movement. In this context, parallel blade movement consists of movement of adjacent blades in the same direction of rotation about their pivotal axes and opposed blade movement consists of movement of adjacent blades in opposite directions of rotation.
- In addition, the utilisation of a drivable interconnection in the form of a train of gears results in an operating member controlling movement and positioning of the blades having a rotary movement which makes it difficult to accurately control the positioning of the operating member and thus the positioning of the blades drivably connected thereto, and the object of this invention is to provide control apparatus such as a fire damper or duct damper in which the above disadvantages are wholly or partly alleviated.
- According to this invention, control apparatus comprises a housing having two or more blades pivotally mounted therein and extending transversely thereof, and operating means drivably interconnected to the blades to produce pivotal movement of the blades in unison, wherein the operating means includes an operating member which is linearly movable.
- Preferably, the operating means comprises gear pinions mounted on the blades which drivably engage the gear teeth of a rack formed on the operating member.
- Preferably, also, each gear pinion is disposed in an aperture formed in the operating member and the gear teeth of the rack which drivably engage the pinion are formed on one side of the'aperture.
- Each pinion is, preferably, provided with gear teeth on only a part of the circumference thereof and the remaining portion of the circumference is a close fit with the other side of the aperture to retain the gear teeth on the pinion in engagement with the gear teeth of the rack.
- Preferably, the gear teeth of the rack which engage the gear pinion associated with one blade are disposed on the opposite side of the aperture in the operating member to the gear teeth of the rack which engage the gear pinion associated with the adjacent blade so that adjacent blades move in opposite directions of rotation.
- Alternatively, the gear teeth of the rack which engage the gear pinion associated with one blade may be disposed on the same side of the aperture in the operating member to the gear teeth of the rack which engage the gear pinion associated with the adjacent blade so that adjacent blades move in the same directions of rotation.
- Preferably, the pivotal axes of the blades are disposed in a single plane and the operating member is slidably mounted in the housing for linear movement in a direction parallel to said single plane.
- Preferably, also, resilient means is provided for urging the blades towards a closed position in which adjacent blades are aligned in touching contact with each other. The resilient means, preferably, comprises one or more springs extending between the operating member and the housing.
- Alternatively, automatic closure means is drivably connected to the operating member via a rack and pinion drive for automatically urging the blades towards their closed position. The automatic closure means, preferably, includes a smoke or heat detector which initiates closing movement of the blades when the presence of smoke or excessive heat is detected.
- Preferably, an operating handle is connected to the operating member to enable the position of the blades to be manually controlled.
- Alternatively, a power-operated actuator is connected to the operating member to control the position of the blades.
- Preferably, also,ad justable stop means associated with the operating member is provided to enable the position, such as the closed position, of the blades to be adjusted.
- Switch means associated with and operated by movement of the operating member relatively to the housing is, preferably, provided for enabling an indication of the position of the blades to be obtained.
- A preferred embodiment of this invention will now be described, by way of example only, with reference to the accompanying drawings of which:-
- Figure 1 is a partly sectioned front elevatiyon of a fire damper or duct damper with parts omitted for the sake of clarity;
- Figure 2 is a side elevation of the fire damper or duct damper with parts omitted for the sake of clarity;
- Figure 3 is a side elevation of the fire damper or duct damper showing a manual operating mechanism;
- Figure 4 is a side elevation of the fire damper or duct damper showing an adjustable stop means;
- Figure 5 is a side elevation of the fire damper or duct damper showing a blade position indicating means;
- Figure 6 is a section on the line VI-VI in Figure .1 of the drawings; and
- Figure 7 is a partly sectioned side elevation of a lock-out mechanism of the fire damper or duct damper.
- Referring now to the drawings, a fire damper or duct damper which is adapted to be mounted in ventilation ducts or ventilation apertures in walls of buildings comprises a substantiallly
rectangular housing 10 having fourblades 12 extending transversely thereof. Eachblade 12 is provided with an integralcentral shaft 14 which is journalled at its ends in the sides of thehousing 10 so that theblades 12 are pivotally movable relatively to thehousing 10 between an open position (not shown) in which theblades 12 extend perpendicularly to the plane of thehousing 10 and a closed position (shown in Figure 1 of the drawings) in which theblades 12 extend parallel to the plane of thehousing 10 and engage in touching contact to prevent or restrict the passage of smoke or noxious gases through thehousing 10 and the ducting or aperture (not shown) in which the fire damper or duct damper is mounted. - A
gear pinion 16 is secured on the portion of eachshaft 14 which projects from one side of thehousing 10 and thepinion 16 is provided with gear teeth on part of the circumference thereof which teeth mesh with the gear teeth of arack 18 formed on a side of an associated elongate substantiallyrectangular aperture 20 in anoperating member 22. The portion of the circumference of eachgear pinion 16 which is provided with gear teeth is arranged to be sufficient to effect pivotal movement of the associatedblade 12 between the open and closed position.. The remaining portion of the circumference of eachpinion 16 is a close fit with the other side of theaperture 20 to retain the gear teeth on thepinion 16 in engagement with the gear teeth of therack 18. The operating member 11 is slidably mounted inguides 24 formed on thehousing 10 and is constrained to move linearly in a direction parallel to a plane containing the pivotal axes of theblades 12. - The portion of the circumference of each
pinion 16 which is devoid of gear teeth and which is a close fit with said other side of the associatedaperture 20 in theoperating member 22 can also be provided with a groove in which theoperating member 22 is a sliding fit. Such grooves in thepinion 16 constitute guides for theoperating member 22 and can be used to replace theguides 24. - The provision of the
racks 18 on opposite sides ofadjacent apertures 20 results in movement of theoperating member 22 producing rotation ofadjacent blades 12 in opposite directions, as shown in the drawings. However, it will be appreciated that if theoperating member 22 is replaced by a similar operating member in which the racks are provided on the same sides of adjacent apertures,adjacent blades 12 will rotate in the same direction when the operating member is moved relatively to thehousing 10. - Referring now particularly to Figure 3 of the drawings, two
helical tension springs 26 are connected between mounting points on theoperating member 22 and thehousing 10 so as to urge theoperating member 22 so that theblades 12 are urged towards their closed position in which they are aligned in touching contact with each other to prevent or restrict the flow of smoke or gases through thehousing 10. Anoperating handle 28 is pivotally mounted--on thehousing 10 and is located between twopins 30 mounted on theoperating member 22 so that movement of thehandle 28 produces corresponding- movement of theoperating member 22 against the action of thesprings 26 to rotate theblades 12 to an open position (not shown). - Referring now particularly to Figure 4 of the drawings, where a fire damper or duct damper is to be utilised as a balancing damper controlling the flow of air through, for example, ventilation ducting, the
operating member 22 is provided with astop 32 extending from one side thereof. Anadjustable screw jack 34 is mounted on thehousing 10 so as to engage thestop 32 and provide a positive limit to movement of theoperating member 22. It will be appreciated that thisstop 32 andscrew jack 34 enable not only the closed position of theblades 12 to be determined but also enable the closing of theblades 12 to be preset at any desired position so as to allow a predetermined volume of air flow therethrough. - Further
adjustable screw jacks 24 and where required additionalassociated stops 32 can be provided to form adjustable limits to enable the open position of theblades 12 to be adjusted. - Referring now to Figure 5 of the drawings, the
same stop 32 or a similar stop can be utilised to actuate twomicro switches 36 mounted on thehousing 10 so that a remote visual indication of the position of the blades can be obtained so that it can easily be determined whether theblades 12 are, for example, in their open or closed position. - Referring now particularly to Figures 1, 2, 6, and 7 of the drawings, the
aperture 20 at the lower end of theoperating member 22 is of extended length and therack 18 formed on the side thereof is also of extended length and engages in mesh with afurther pinion 38 mounted on a shaft 40 journalled in an extension 42 of thehousing 10. The shaft 40 is constrained against endwise movement by means of twocirclips 43 disposed on each side of the extension 42. The shaft 40 is also provided with a spiral groove 44 and apin 46 is adapted to engage in the groove so that sliding movement of thepin 46 produces rotation of the shaft 40, thepinion 38 and movement of theoperating member 22 and theblades 12 in thehousing 10. - The
pin 46 is mounted in acylinder 48 which is slidable in the bore of aboss 50 of the extension 42. Ahelical compression spring 52 is confined endwise between theboss 50 and an enlargeddiameter portion 54 of thecylinder 48. The end face of the enlargeddiameter portion 54 of thecylinder 48 is engaged by apiston 56 extending from acylinder 58 containing wax and anelectrical heating element 60 is wound around the external surface of thecylinder 58. - In operation, when a smoke detection device (not shown) detects the presence of smoke or a temperature sensing device (not shown) detects excessive heat indicating a fire, the
electrical heating element 60 heats the wax in thecylinder 58 and moves thepiston 56 towards thepinion 38. Thecylinder 48 is thus moved against the action of thespring 52 towards thepinion 38 and the movement of thepin 46 in the spiral groove 44 produces rotation of the shaft 40 urging theblades 12 towards their closed position. If the smoke or excessive heat detected do not persist, and the signal to theelectrical heating element 16 is removed thepiston 56 retracts into thecylinder 58 under the action of thespring 52 and the corresponding movement of thepin 46 in the spiral groove 44 produces rotation of the shaft 40 to return theblades 12 to their open position. - However, referring now to Figure 7 of the drawings once the
blades 12 have reached their fully closed position due to operation of the above described automatic closure means, a spring loaded plunger indicated generally at 62 mounted in theboss 50 of the extension 42 extends through an aperture in thecylinder 48 and prevents sliding movement thereof under the action of thespring 52 so that theblades 12 are retained in their closed position until the spring loaded plunger is manually withdrawn to reset the automatic closure means. - It will be appreciated that the linear movement of the
operating member 22 of the above described fire damper or duct damper in combination with the utilisation of rack and pinion drives for the blades facilitates the production of a fire damper or duct damper in which the positioning of the blades can be accurately controlled utilising relatively simple adjustable stops mounted on thehousing 10 andoperating member 22. In addition, it will be appreciated that the alternatives of parallel or opposed blade movement can be readily provided in a fire damper or duct damper having a basically standard configuration by merely changing the type ofoperating member 22 utilised in the fire damper. - In a modification, the
operating member 22 is connected to a linear actuator (not shown) mounted on thehousing 10 which effects sliding movement of theoperating member 22 to open and close the blades of the fire damper or duct damper or to adjust the position thereof.
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8332651 | 1983-12-07 | ||
GB838332651A GB8332651D0 (en) | 1983-12-07 | 1983-12-07 | Fire damper |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0154089A2 true EP0154089A2 (en) | 1985-09-11 |
EP0154089A3 EP0154089A3 (en) | 1986-08-20 |
EP0154089B1 EP0154089B1 (en) | 1989-03-29 |
Family
ID=10552946
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84308474A Expired EP0154089B1 (en) | 1983-12-07 | 1984-12-06 | Damper |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0154089B1 (en) |
DE (1) | DE3477508D1 (en) |
GB (2) | GB8332651D0 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU614195B2 (en) * | 1988-11-07 | 1991-08-22 | Unique Metal Works Pty Ltd | Air volume damper |
WO2003098050A1 (en) * | 2002-05-22 | 2003-11-27 | Cata Electrodomesticos, S.L. | Self-opening air extractor |
EP3225931A1 (en) | 2016-04-01 | 2017-10-04 | Bröderna Rasch AB | Damper for ventilation system |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE139134T1 (en) * | 1989-03-28 | 1996-06-15 | Kuhn Gmbh Rolf | DEVICE FOR CLOSING VENTILATION DEVICES |
DE19930413A1 (en) * | 1999-07-02 | 2001-01-04 | Sft Schneider Fenstertechnik G | Louvered window has pinions on pivot bearing shafts engaging with toothed bar sections, and slide rod |
FR3037283B1 (en) * | 2015-06-12 | 2019-11-22 | Valeo Systemes Thermiques | FRONT FACE AIR ENTRY SHUTTERING DEVICE OF MOTOR VEHICLE |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191316797A (en) * | 1913-07-22 | 1914-06-18 | Charles Andrew Newton | Improvements in and relating to Ventilating Apparatus. |
GB708218A (en) * | 1951-07-11 | 1954-04-28 | Arthur Francis Agnew | Movable flap louver windows |
GB931011A (en) * | 1960-09-06 | 1963-07-10 | Stone J & Co Ltd | Improvements relating to thermostatic control apparatus |
US3967779A (en) * | 1974-02-01 | 1976-07-06 | Aeronca, Inc. | Air mixing valve having a thermal motor actuator for effecting adjustment |
EP0060112A2 (en) * | 1981-03-06 | 1982-09-15 | Nordisk Ventilator Co. A/S | A ventilation damper assembly with a number of parallel and rotatable rectangular damper blades |
DE3110435A1 (en) * | 1981-03-18 | 1982-10-21 | Hellmuth 3320 Salzgitter Möhlenhoff | Device for actuating a flap for the aeration or deaeration of a room |
GB2098475A (en) * | 1981-05-15 | 1982-11-24 | Tatum James R | Damper blade actuating mechanism |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB599567A (en) * | 1945-09-18 | 1948-03-16 | Ann Morris | Improvements in ventilator constructions for buildings |
GB683799A (en) * | 1951-09-11 | 1952-12-03 | F W Gissing Pty Ltd | Improvements relating to operating means for louvre windows |
US3680470A (en) * | 1970-10-15 | 1972-08-01 | Dynaplastics Inc | Louver with a reduced turning radius |
GB1483843A (en) * | 1975-06-09 | 1977-08-24 | Kris Overseas Ltd | Edge fitting for a louvred window |
GB2008742B (en) * | 1977-08-17 | 1982-09-08 | Blaw Ducts Ltd | Opposed blade damper |
GB2118293B (en) * | 1979-01-17 | 1984-04-11 | Actionair Equip | Fluid damper |
-
1983
- 1983-12-07 GB GB838332651A patent/GB8332651D0/en active Pending
-
1984
- 1984-12-06 EP EP84308474A patent/EP0154089B1/en not_active Expired
- 1984-12-06 GB GB08430877A patent/GB2151013B/en not_active Expired
- 1984-12-06 DE DE8484308474T patent/DE3477508D1/en not_active Expired
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191316797A (en) * | 1913-07-22 | 1914-06-18 | Charles Andrew Newton | Improvements in and relating to Ventilating Apparatus. |
GB708218A (en) * | 1951-07-11 | 1954-04-28 | Arthur Francis Agnew | Movable flap louver windows |
GB931011A (en) * | 1960-09-06 | 1963-07-10 | Stone J & Co Ltd | Improvements relating to thermostatic control apparatus |
US3967779A (en) * | 1974-02-01 | 1976-07-06 | Aeronca, Inc. | Air mixing valve having a thermal motor actuator for effecting adjustment |
EP0060112A2 (en) * | 1981-03-06 | 1982-09-15 | Nordisk Ventilator Co. A/S | A ventilation damper assembly with a number of parallel and rotatable rectangular damper blades |
DE3110435A1 (en) * | 1981-03-18 | 1982-10-21 | Hellmuth 3320 Salzgitter Möhlenhoff | Device for actuating a flap for the aeration or deaeration of a room |
GB2098475A (en) * | 1981-05-15 | 1982-11-24 | Tatum James R | Damper blade actuating mechanism |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU614195B2 (en) * | 1988-11-07 | 1991-08-22 | Unique Metal Works Pty Ltd | Air volume damper |
WO2003098050A1 (en) * | 2002-05-22 | 2003-11-27 | Cata Electrodomesticos, S.L. | Self-opening air extractor |
EP3225931A1 (en) | 2016-04-01 | 2017-10-04 | Bröderna Rasch AB | Damper for ventilation system |
Also Published As
Publication number | Publication date |
---|---|
DE3477508D1 (en) | 1989-05-03 |
GB8332651D0 (en) | 1984-01-11 |
GB2151013B (en) | 1987-07-15 |
GB8430877D0 (en) | 1985-01-16 |
EP0154089B1 (en) | 1989-03-29 |
EP0154089A3 (en) | 1986-08-20 |
GB2151013A (en) | 1985-07-10 |
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