EP1511963A1 - Method for manufacturing a ventilation closing plate and a closing plate - Google Patents

Method for manufacturing a ventilation closing plate and a closing plate

Info

Publication number
EP1511963A1
EP1511963A1 EP03757086A EP03757086A EP1511963A1 EP 1511963 A1 EP1511963 A1 EP 1511963A1 EP 03757086 A EP03757086 A EP 03757086A EP 03757086 A EP03757086 A EP 03757086A EP 1511963 A1 EP1511963 A1 EP 1511963A1
Authority
EP
European Patent Office
Prior art keywords
baffle
sealing surface
opening
partly
closing plate
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.)
Withdrawn
Application number
EP03757086A
Other languages
German (de)
French (fr)
Inventor
Jouni Tuomi
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.)
Flaekt Woods AB
Original Assignee
Flaekt Woods AB
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 Flaekt Woods AB filed Critical Flaekt Woods AB
Publication of EP1511963A1 publication Critical patent/EP1511963A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
    • 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
    • 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
    • F24F13/1406—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by sealing means
    • 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

  • the invention relates to a method for manufacturing an air- conditioning system closing plate, the method comprising manufacturing a support structure with an opening having a first sealing surface and arranging in the opening a turnable baffle having a second sealing surface and being turnable to a closed position, in which the turnable baffle is arranged to substantially entirely close the opening and in which the second sealing surface of the baffle is arranged to at least partly touch the first sealing surface of the opening and to at least partly seal a gap between the first and second sealing surfaces.
  • the invention also relates to an air-conditioning system closing plate that comprises a support structure with an opening having a first seal- ing surface and in the opening a turnable baffle having a second sealing surface and being turnable to a closed position, in which the turnable baffle is arranged to substantially entirely close the opening and in which the second sealing surface of the baffle is arranged to at least partly touch the first sealing surface of the opening and to at least partly seal the gap between the first and second sealing surfaces.
  • a problem with such a closing plate is the tightness between the baffle and support structure and how to make a closing plate, in which the baffle and support structure can together form such a tight structure that prevents fire gases and the like from spreading in the air-conditioning system.
  • Another problem is the fastening of the sealing between the first and second sealing surfaces to the baffle.
  • the sealing is mounted between two parts that are pressed together.
  • the prior-art solutions therefore always require at least two parts for mounting the sealing. This is a specific problem if the manufacturer makes a great deal of closing plates with different sizes. Different-sized closing plates require different-sized parts and this multiplies the number of required parts. In addition, the joining of the parts takes time.
  • One advantage of the solution of the invention is that the second sealing surface can be made to exactly match the first sealing surface. This results in a tight structure when the baffle is in its closed position. In addition, only a little time is needed to make the baffle, because the sealing is mounted in a groove. This reduces the number of required items by at least half, because the sealing is not mounted between two parts.
  • the sealing groove is easy to make while the second sealing surface is machined in the same machine tool, for instance.
  • the closing plate of the invention can therefore be made with a smaller number of work stages than the conventional closing plate.
  • the second sealing surface of the baffle can easily be streamlined using machining, in which case the pressure loss caused by the baffle is small when the baffle is in the open position shown in Figure 2, for instance. Pressure loss occurs, because the baffle is in the airflow passing through the opening of the closing plate.
  • the baffle causes turbulence in the airflow, for instance. It is also possible to affect the sound level by means of the shape of the second sealing surface. The baffle causes sound when it is in the airflow. Machining the second sealing surface of the baffle to be streamlined and to cause less turbulence also reduces the sound level caused by the baffle.
  • a drilling for a shaft can also preferably, but not necessarily, be machined to the edge of the baffle. More preferably, but not necessarily, two drillings are machined to the baffle, one drilling diametrically on each side of the baffle. Each drilling preferably, but not necessarily, comprises a bottom.
  • a spring can then first be placed in each drilling and after this, a shaft.
  • the baffle can be mounted in place in such a manner that the baffle is mounted on the support structure having recesses for the shafts and the baffle is positioned so that the shafts installed in the drillings are at the location of the recesses, as a result of which the springs placed in the drillings push the shafts to the recesses. Drillings of this type are easy to make while the second sealing surface of the baffle and the groove are machined.
  • Figure 1 is an air-conditioning system closing plate in a situation, in which the baffle is closed
  • Figure 2 is an air-conditioning system closing plate in a situation, in which the baffle is open
  • Figure 3 shows a circular baffle
  • Figure 4 is a rectangular baffle
  • Figures 1 and 2 show an air-conditioning system closing plate that comprises a support structure 1 with an opening (not marked with a reference number) having a first sealing surface 2.
  • the air-conditioning system closing plate also comprises a turnable baffle 3 having a second sealing surface 4.
  • the turnable baffle 3 can be turned to a closed position, in which the turnable baffle 3 is arranged to substantially entirely close the opening and in which the second sealing surface 4 of the baffle 3 is arranged to at least partly touch the first sealing surface 2 of the opening and to at least partly seal a gap 5 between the first sealing surface 2 and the second sealing surface 4.
  • first sealing surface 2 and the second sealing surface 4 refer to the surfaces that are arranged to settle against each other when the baffle 3 closes the gap of the support structure 1.
  • the baffle 3 and the opening can have any cross-profile shape. For instance, Figure 3 shows a circular baffle 3 and Figure 4 shows a rectangular baffle 3.
  • the second sealing surface 4 of the baffle 3 is at least partly machined to match the first sealing surface 2 of the opening.
  • FIG 4 which shows a rectangular baffle 3
  • the second sealing surface 4 of the baffle 3 is straight.
  • the figures show baffles 3 that are turnable around a shaft 6 in the middle of the baffle 3 in such a manner that on both sides of the baffle 3, there is a second sealing surface 4 arranged to settle against the first sealing surface 2 of the opening.
  • the cross-profile of the second sealing surface 4 is partly curved, because it is made to match in cross-profile the first sealing surface 2 that is curved in cross-profile.
  • the first sealing surface 2 and the second sealing surface 4 can alternatively have another matching cross- profile shape.
  • Figures 1 and 2 show a support structure 1 that is a casing part and comprises elements for connecting the closing plate to other components (not shown) of the air-conditioning system.
  • An air-conditioning duct (not shown) can be such a component.
  • the baffle 3 can at least partly be made of a ceramic material or calcium silicate.
  • a groove 7 for a sealing material 8 can also be machined to the baffle 3, the sealing material 8 being arranged to at least partly settle between the baffle 3 and support structure 1 when the baffle 3 is turned to its closed position.
  • a drilling 9 for the shaft 6 can also be machined to the baffle 3, the baffle 3 being turnable around the shaft 6 to its closed position.
  • the invention also relates to a method for manufacturing an air-conditioning system closing plate.
  • a support structure 1 with an opening having a first sealing surface 2 is manufactured.
  • a turnable baffle 3 having a second sealing surface 4 is arranged in the opening, the turnable baffle 3 being turn- able to a closed position in which the turnable baffle 3 is arranged to substan- tially entirely close the opening and in which the second sealing surface 4 of the baffle 3 is arranged to at least partly touch the first sealing surface 2 of the opening.
  • the second sealing surface 4 of the baffle 3 is machined to at least partly match the first sealing surface 2 of the opening.
  • the baffle 3 can be at least partly manufactured from a ceramic material or calcium silicate.
  • a groove 7 for a sealing material 8 can also be machined to the baffle 3, the sealing material 8 being arranged to at least partly settle between the baffle 3 and support structure 1 when the baffle 3 is turned to its closed position.
  • a drilling 9 for a shaft 6 can also be machined to the baffle 3, the baffle 3 being turnable around the shaft 6 to its closed position.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Air-Flow Control Members (AREA)

Abstract

The invention relates to a method for manufacturing an air-conditioning system closing plate and to an air-conditioning system closing plate. The method comprises manufacturing a support structure (1) with an opening having a first sealing surface (2). In the opening, a turnable baffle (3) is arranged having a second sealing surface (4) and being turnable to a closed position, in which the turnable baffle (3) is arranged to substantially entirely close the opening and in which the second sealing surface (4) of the baffle (3) is arranged to at least partly touch the first sealing surface (2) of the opening and to at least partly seal a gap (5) between the first (2) and second (4) sealing surfaces. The second sealing surface (4) of the baffle (3) is machined to at least partly match the first sealing surface (2) of the opening.

Description

Method -forϊ manufacturing a ventilation closing plate and a closing plate.
BACKGROUND OF THE INVENTION
[0001] The invention relates to a method for manufacturing an air- conditioning system closing plate, the method comprising manufacturing a support structure with an opening having a first sealing surface and arranging in the opening a turnable baffle having a second sealing surface and being turnable to a closed position, in which the turnable baffle is arranged to substantially entirely close the opening and in which the second sealing surface of the baffle is arranged to at least partly touch the first sealing surface of the opening and to at least partly seal a gap between the first and second sealing surfaces.
[0002] The invention also relates to an air-conditioning system closing plate that comprises a support structure with an opening having a first seal- ing surface and in the opening a turnable baffle having a second sealing surface and being turnable to a closed position, in which the turnable baffle is arranged to substantially entirely close the opening and in which the second sealing surface of the baffle is arranged to at least partly touch the first sealing surface of the opening and to at least partly seal the gap between the first and second sealing surfaces.
[0003] Numerous air-conditioning system closing plates are previously known, which comprise a support structure with an opening, to which a turnable baffle is arranged. The purpose of the baffle is to tightly close said opening in the support structure during a fire, for instance, in such a manner that fire gases or the like cannot spread in the air-conditioning system or out of it, but the spreading of the gases is stopped at the baffle that closes the opening.
[0004] A problem with such a closing plate is the tightness between the baffle and support structure and how to make a closing plate, in which the baffle and support structure can together form such a tight structure that prevents fire gases and the like from spreading in the air-conditioning system.
[0005] Another problem is the fastening of the sealing between the first and second sealing surfaces to the baffle. In the prior-art solutions, the sealing is mounted between two parts that are pressed together. The prior-art solutions therefore always require at least two parts for mounting the sealing. This is a specific problem if the manufacturer makes a great deal of closing plates with different sizes. Different-sized closing plates require different-sized parts and this multiplies the number of required parts. In addition, the joining of the parts takes time.
BRIEF DESCRIPTION OF THE INVENTION
[0006] It is thus an object of the invention to develop a method for manufacturing an air-conditioning system closing plate and an air-conditioning system closing plate that solves the above-mentioned problems.
[0007] The object of the invention is achieved by a method and air- conditioning system closing plate that are characterized by what is stated in the independent claims.
[0008] Preferred embodiments of the invention are set forth in the dependent claims.
[0009] One advantage of the solution of the invention is that the second sealing surface can be made to exactly match the first sealing surface. This results in a tight structure when the baffle is in its closed position. In addition, only a little time is needed to make the baffle, because the sealing is mounted in a groove. This reduces the number of required items by at least half, because the sealing is not mounted between two parts. The sealing groove is easy to make while the second sealing surface is machined in the same machine tool, for instance. The closing plate of the invention can therefore be made with a smaller number of work stages than the conventional closing plate.
[0010] One advantage of the solution of the invention is that the second sealing surface of the baffle can easily be streamlined using machining, in which case the pressure loss caused by the baffle is small when the baffle is in the open position shown in Figure 2, for instance. Pressure loss occurs, because the baffle is in the airflow passing through the opening of the closing plate. The baffle causes turbulence in the airflow, for instance. It is also possible to affect the sound level by means of the shape of the second sealing surface. The baffle causes sound when it is in the airflow. Machining the second sealing surface of the baffle to be streamlined and to cause less turbulence also reduces the sound level caused by the baffle.
[0011] A drilling for a shaft can also preferably, but not necessarily, be machined to the edge of the baffle. More preferably, but not necessarily, two drillings are machined to the baffle, one drilling diametrically on each side of the baffle. Each drilling preferably, but not necessarily, comprises a bottom. When the baffle is mounted in place, a spring can then first be placed in each drilling and after this, a shaft. After this, the baffle can be mounted in place in such a manner that the baffle is mounted on the support structure having recesses for the shafts and the baffle is positioned so that the shafts installed in the drillings are at the location of the recesses, as a result of which the springs placed in the drillings push the shafts to the recesses. Drillings of this type are easy to make while the second sealing surface of the baffle and the groove are machined.
BRIEF DESCRIPTION OF THE FIGURES
[0012] The invention will now be described in greater detail by means of preferred embodiments and with reference to the attached drawings, in which Figure 1 is an air-conditioning system closing plate in a situation, in which the baffle is closed,
Figure 2 is an air-conditioning system closing plate in a situation, in which the baffle is open,
Figure 3 shows a circular baffle, and Figure 4 is a rectangular baffle.
DETAILED DESCRIPTION OF THE INVENTION
[0013] Figures 1 and 2 show an air-conditioning system closing plate that comprises a support structure 1 with an opening (not marked with a reference number) having a first sealing surface 2. [0014] The air-conditioning system closing plate also comprises a turnable baffle 3 having a second sealing surface 4.
[0015] The turnable baffle 3 can be turned to a closed position, in which the turnable baffle 3 is arranged to substantially entirely close the opening and in which the second sealing surface 4 of the baffle 3 is arranged to at least partly touch the first sealing surface 2 of the opening and to at least partly seal a gap 5 between the first sealing surface 2 and the second sealing surface 4.
[0016] In this application, the first sealing surface 2 and the second sealing surface 4 refer to the surfaces that are arranged to settle against each other when the baffle 3 closes the gap of the support structure 1. [0017] The baffle 3 and the opening can have any cross-profile shape. For instance, Figure 3 shows a circular baffle 3 and Figure 4 shows a rectangular baffle 3.
[0018] The second sealing surface 4 of the baffle 3 is at least partly machined to match the first sealing surface 2 of the opening.
[0019] In Figure 3, which shows a circular baffle 3, the second sealing surface 4 of the baffle 3 is curved.
[0020] In Figure 4, which shows a rectangular baffle 3, the second sealing surface 4 of the baffle 3 is straight. [0021] The figures show baffles 3 that are turnable around a shaft 6 in the middle of the baffle 3 in such a manner that on both sides of the baffle 3, there is a second sealing surface 4 arranged to settle against the first sealing surface 2 of the opening.
[0022] In Figures 1 and 2, the cross-profile of the second sealing surface 4 is partly curved, because it is made to match in cross-profile the first sealing surface 2 that is curved in cross-profile. The first sealing surface 2 and the second sealing surface 4 can alternatively have another matching cross- profile shape.
[0023] Figures 1 and 2 show a support structure 1 that is a casing part and comprises elements for connecting the closing plate to other components (not shown) of the air-conditioning system. An air-conditioning duct (not shown) can be such a component.
[0024] The baffle 3 can at least partly be made of a ceramic material or calcium silicate. [0025] A groove 7 for a sealing material 8 can also be machined to the baffle 3, the sealing material 8 being arranged to at least partly settle between the baffle 3 and support structure 1 when the baffle 3 is turned to its closed position.
[0026] A drilling 9 for the shaft 6 can also be machined to the baffle 3, the baffle 3 being turnable around the shaft 6 to its closed position.
[0027] The invention also relates to a method for manufacturing an air-conditioning system closing plate.
[0028] In the method, a support structure 1 with an opening having a first sealing surface 2 is manufactured. A turnable baffle 3 having a second sealing surface 4 is arranged in the opening, the turnable baffle 3 being turn- able to a closed position in which the turnable baffle 3 is arranged to substan- tially entirely close the opening and in which the second sealing surface 4 of the baffle 3 is arranged to at least partly touch the first sealing surface 2 of the opening.
[0029] In the method, the second sealing surface 4 of the baffle 3 is machined to at least partly match the first sealing surface 2 of the opening.
[0030] In the method, the baffle 3 can be at least partly manufactured from a ceramic material or calcium silicate.
[0031] In the method, a groove 7 for a sealing material 8 can also be machined to the baffle 3, the sealing material 8 being arranged to at least partly settle between the baffle 3 and support structure 1 when the baffle 3 is turned to its closed position.
[0032] In the method, a drilling 9 for a shaft 6 can also be machined to the baffle 3, the baffle 3 being turnable around the shaft 6 to its closed position. [0033] It is obvious to a person skilled in the art that while the technology advances, the basic idea of the invention can be implemented in many different ways. The invention and its embodiments are thus not restricted to the examples described above, but can vary within the scope of the claims.

Claims

1. A method for manufacturing an air-conditioning system closing plate, the method comprising manufacturing a support structure (1) with an opening having a first sealing surface (2), and arranging in the opening a turnable baffle (3) having a second sealing surface (4) and being turnable to a closed position, in which the turnable baffle (3) is arranged to substantially entirely close the opening and in which the second sealing surface (4) of the baffle (3) is arranged to at least partly touch the first sealing surface (2) of the opening and to at least partly seal a gap between the first (2) and second (4) sealing surfaces, characterized by machining the second sealing surface (4) of the baffle (3) to at least partly match the first sealing surface (2) ofthe opening, and machining to the baffle (3) a groove for a sealing material (8), the sealing material (8) being arranged to at least partly settle between the baffle (3) and support structure (1) when the baffle (3) is turned to the closed position.
2. A method as claimed in claim 1, characterized by manu- facturing the baffle (3) at least partly from a ceramic material.
3. A method as claimed in claim 1, characterized by manufacturing the baffle (3) at least partly from calcium silicate.
4. A method as claimed in any one of claims 1 to 3, characterize d by machining to the baffle (3) a drilling (9) for a shaft (6), around which shaft (6) the baffle (3) is turnable to the close position.
5. An air-conditioning system closing plate that comprises a support structure (1) with an opening having a first sealing surface (2), and in the opening, a turnable baffle (3) having a second sealing surface (4) and being turnable to a closed position, in which the turnable baffle (3) is arranged to substantially entirely close the opening and in which the second sealing surface (4) of the baffle (3) is arranged to at least partly touch the first sealing surface (2) of the opening and to at least partly seal a gap (5) between the first (2) and second (4) sealing surfaces, characterized in that the second sealing surface (4) of the baffle (3) is machined to at least partly match the first sealing surface (2) ofthe opening, and to the baffle (3), a groove (7) is machined for a sealing material (8), which sealing material (8) is arranged to at least partly settle between the baf- fie (3) and support structure (1 ) when the baffle (3) is turned to the closed position.
6. A closing plate as claimed in claim 5, characterized in that the baffle (3) is at least partly made of a ceramic material.
7. A closing plate as claimed in claim 5, characterized in that the baffle (3) is at least partly made of calcium silicate.
8. A closing plate as claimed in any one of claims 5 to 7, c h a r - acterized in that to the baffle (3) a drilling (9) is machined for a shaft (6), around which shaft (6) the baffle (3) is turnable to the closed position.
EP03757086A 2002-06-11 2003-06-10 Method for manufacturing a ventilation closing plate and a closing plate Withdrawn EP1511963A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20021123A FI20021123A (en) 2002-06-11 2002-06-11 Process for producing a damper for an air conditioning system and a damper for an air conditioning system
FI20021123 2002-06-11
PCT/FI2003/000458 WO2003104721A1 (en) 2002-06-11 2003-06-10 Method for manufacturing a ventilation closing plate and a closing plate

Publications (1)

Publication Number Publication Date
EP1511963A1 true EP1511963A1 (en) 2005-03-09

Family

ID=8564124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03757086A Withdrawn EP1511963A1 (en) 2002-06-11 2003-06-10 Method for manufacturing a ventilation closing plate and a closing plate

Country Status (4)

Country Link
EP (1) EP1511963A1 (en)
AU (1) AU2003232275A1 (en)
FI (1) FI20021123A (en)
WO (1) WO2003104721A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL205587B1 (en) * 2005-10-27 2010-05-31 Ciat Spo & Lstrok Ka Z Ogranic Fire protection cut off flap
DE202008014234U1 (en) * 2008-10-25 2008-12-24 Krensel Gmbh Brandschutztechnische Bausysteme Fire / Entrauchungseinrichtung
JP6266998B2 (en) * 2014-02-17 2018-01-24 豊和化成株式会社 Round register

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605201A (en) * 1979-05-03 1986-08-12 Okumura Engineering Works Co., Ltd. Butterfly valve
DE4337097C2 (en) * 1992-11-02 1996-03-14 Toyota Motor Co Ltd Supporting structure for a ceramic throttle valve assembly
DE4329527A1 (en) * 1993-09-02 1995-03-09 Mann & Hummel Filter Throttle device
DE4409088A1 (en) * 1994-03-17 1995-09-21 Werner Wildeboer Fire barrier in ventilation pipes
US6283448B1 (en) * 2000-04-19 2001-09-04 Daniel Webster Denton Offset butterfly valve
FI20001677A (en) * 2000-07-17 2002-01-18 Abb Flokt Oy Closure damper for air conditioning system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03104721A1 *

Also Published As

Publication number Publication date
FI20021123A (en) 2003-12-12
AU2003232275A1 (en) 2003-12-22
FI20021123A0 (en) 2002-06-11
WO2003104721A1 (en) 2003-12-18

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18D Application deemed to be withdrawn

Effective date: 20051108