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EP1779901B1 - Fire damper - Google Patents

Fire damper Download PDF

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Publication number
EP1779901B1
EP1779901B1 EP06460001.8A EP06460001A EP1779901B1 EP 1779901 B1 EP1779901 B1 EP 1779901B1 EP 06460001 A EP06460001 A EP 06460001A EP 1779901 B1 EP1779901 B1 EP 1779901B1
Authority
EP
European Patent Office
Prior art keywords
division
fire damper
fire
fuse link
closed position
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.)
Revoked
Application number
EP06460001.8A
Other languages
German (de)
French (fr)
Other versions
EP1779901A2 (en
EP1779901A3 (en
Inventor
Andrzej Szarycki
Krzysztof Kaczmarek
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.)
GREMPCO SA
Original Assignee
Grempco S A
Grempco SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37808001&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1779901(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Grempco S A, Grempco SA filed Critical Grempco S A
Priority to PL06460001T priority Critical patent/PL1779901T3/en
Publication of EP1779901A2 publication Critical patent/EP1779901A2/en
Publication of EP1779901A3 publication Critical patent/EP1779901A3/en
Application granted granted Critical
Publication of EP1779901B1 publication Critical patent/EP1779901B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/24—Operating or controlling mechanisms
    • A62C2/241—Operating or controlling mechanisms having mechanical actuators and heat sensitive parts
    • A62C2/242—Operating or controlling mechanisms having mechanical actuators and heat sensitive parts with fusible links
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/14—Fire prevention, containment or extinguishing specially adapted for particular objects or places in connection with doors, windows, ventilators, partitions, or shutters, e.g. automatic closing

Definitions

  • the subject invention relates to a fire damper.
  • One of the problems that need to be solved in the domain of ventilation and air-conditioning installations is fire protection of a vented or air-conditioned unit
  • Unprotected ventilation and air-conditioning ducts and pipes running through the elements of a fire division constitute a way along which the fire is spread through. Therefore they cause a decrease of fire protection level.
  • the solution of this problem is to fit elements that cut off the zones in fire inside the ventilation and/or air-conditioning ducts and pipes and allow for walls, ceiling and floors to keep their fire protection integrity. This way other areas are protected against hot smoke and gas and may operate in nominal conditions.
  • Those elements arc fire cut off flap valves or fire dampers. They constitute the elements of fire protection installed in the ventilation and/or air-conditioning ducts and pipes passages through the walls, ceiling and floors.
  • Patent literature offers various cut off flap valves solutions working in auto and controlled mode.
  • British patent claim nr GB 2 399 497 presents a cut off flap valve, placed outside a vent duct, equipped with a spring tightening device. The flap is kept in open position by the outer wall of the vent duct. The closure of the duct results from the fact that the heated vent duct loses its stiffness. The thrust of the flap on the wall of the vent duct, effected by a spring device results in progressing indenting of the wall of the vent duct until the flow is completely cut off.
  • European patent claim nr EP 0 829 689 presents a flap valve fitted axially in a narrowing inside the vent duct.
  • the narrowing is constituted by a ring with a flap rotation axis fixed in a horizontal plane. Both the ring and the flap are formed in such a way that the flap when rotated by 90 deg., rests against a pitch /thread made in the ring. Additionally, flexible plates are fitted on the flap and the ring, sealing the flap in a closed position.
  • WO00/20803 discloses a control device for controlling flow of air through an opening having a rectangular body and comprising a flow control member (division) which moves between open and closed positions, closure means (e.g. spring attached to the body of the device) which can be moved between rest condition, in which the control member can move, and active condition, in which the closure means force the control member to remain in closed position; and sensing means detecting the hazard conditions (e.g. made of material susceptible to rise of temperature) acting on the closure means to move it from rest to active conditions.
  • Said spring extends through the opening division and is attached to a bracket on the other side of the division with the help of said material susceptible to rise of temperature.
  • the division is not provided with a flexible sealing ring nor any element providing smoke integrity.
  • this document describes a device which is regarded as static fire damper, i.e. device which operates in static conditions, i.e. in which the ventilation (air conditioning) system is turned off in whole building after the fire is detected so there is no air flow in ducts and there no difference of pressure between isolated area where fire is detected and protected area of building.
  • static fire damper i.e. device which operates in static conditions, i.e. in which the ventilation (air conditioning) system is turned off in whole building after the fire is detected so there is no air flow in ducts and there no difference of pressure between isolated area where fire is detected and protected area of building.
  • US 4,858,517 discloses a dynamic fire damper having a cylindrical body comprising a self-closing division that is fixed inside the body and linked to the inside wall of the body by means of a closing spring device and is kept open by means of a releasing fuse link element. Both these elements are located inside the body and their planes of operation are perpendicular to the axis of the division.
  • polish technical approval ITB-15-6622/2005 discloses dynamic fire damper, a device which operates in dynamic conditions, i.e. in which the ventilation (air conditioning) system is still running despite that there is a fire in certain areas of the building.
  • the device described in said document contains a cylindrical body comprising a self-closing division that is fixed inside the body on an axis; closing spring device and a releasing fuse link element.
  • the division is provided with a flexible sealing ring fixed in its circumference notch and cooperating with a thermally expanding gasket located on the inside wall of the body.
  • the closing spring device includes a manual lever and a spring placed on a shaft being the axis of the division.
  • the dosing spring device is placed outside of the cylindrical body.
  • the fuse link is located inside the body but its plane of operation is not perpendicular to the axis of the division, but parallel.
  • the operation of the releasing mechanism used in discussed document is completely different than the operation of the invention. Instead of simple releasing of the spring device, the operation of the closest prior art is based on use of a sophisticated and multi-part interlock mechanism.
  • the fire damper according to the current invention is composed of a cylindrical body comprising a self-closing division that is fixed inside the body on an axis via bearings.
  • the division is linked to the inside wall of the body by means of a closing spring device and is kept in an open position by means of a releasing fuse link element.
  • the division is also provided with a flexible sealing ring fixed in its circumference notch and cooperating with a thermally expanding gasket located on the inside wall of the body in a lateral plane corresponding to the closed position of the division.
  • the fire damper of the invention is further defined by the characterizing part of claim 1.
  • At least two rows of lengthwise holes protecting against heat conduction are provided on the body wall in the lateral plane corresponding to the closed position of the division.
  • limit switches are placed inside the body for monitoring the position of the division.
  • the releasing fuse link device is preferably connected in series with an electromagnet providing a remote control for the division.
  • the body of the fire damper may he made in such a way that its diameter equals the diameter of vent duct.
  • fig. 1 presents a longitudinal semi-view and a semi-section of a nipple type fire damper according to the invention in a closed position
  • fig. 2 presents a longitudinal semi-view and a semi-section of a sleeve type cut off flap valve of the invention in a closed position open
  • fig. 3 presents a longitudinal view of the cut off flap valve with limit switches in a closed position.
  • Fig. 4 presents a detail of the division in sectional view.
  • a division 6, made of a high temperature resistant metal is fixed diametrally on an axis 1 inside a circular body 5 via bearings 4.
  • the division 6 is kept in an open position by a fuse-link releasing device 3.
  • the division 6 is linked to the body 5 with a spring closing device 2.
  • the spring closing device 2 and the fuse-link releasing element 3 are fitted inside the body 5, their planes of operation being perpendicular to the axis 1 on which the division 6 has been fixed.
  • the division 6 has a circumferential notch 10, in which a continuous flexible sealing ring 11 having a rectangular cross-section has been mounted that cooperates closely with a thermally expanding gasket 12 located inside the body on the body wall 5 in a lateral plane corresponding to the position of the division 6 in a closed position.
  • At least two rows of lengthwise holes 13 are located on the body wall in a lateral plane corresponding to the position of the division 6 in order to prevent heat conduction along the body 5.
  • the position of the division 6 may be monitored by limit switches 8, 9 placed inside the body 5.
  • the switch limit 9 indicating the open position of the division 6 is installed on a bracket 7.
  • the switch limit 8 indicates the closed position of the division 6.
  • the body 5 of the fire damper has a diameter similar to that of the vent duct which makes the installation fitting easier.
  • the fire damper can be of two types. In the nipple version of the body 5, the vent duct endings enclose the body endings while in the sleeve type, the vent duct endings are inverted into the inside of the body 5.
  • the fire damper is open. The area of a fire outbreak is being cut-off by the self-closure of the fire resisting division 6 due to temperature increase in the vent duct and the release of the fuse 3 that results in a release of the potential energy accumulated in the tensioned spring of the closing device 2.
  • an electromagnet may be connected in series to the release fuse device 3 that allows for the division 6 position to be remote controlled.

Landscapes

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

Description

  • The subject invention relates to a fire damper. One of the problems that need to be solved in the domain of ventilation and air-conditioning installations is fire protection of a vented or air-conditioned unit Unprotected ventilation and air-conditioning ducts and pipes running through the elements of a fire division constitute a way along which the fire is spread through. Therefore they cause a decrease of fire protection level. The solution of this problem is to fit elements that cut off the zones in fire inside the ventilation and/or air-conditioning ducts and pipes and allow for walls, ceiling and floors to keep their fire protection integrity. This way other areas are protected against hot smoke and gas and may operate in nominal conditions. Those elements arc fire cut off flap valves or fire dampers. They constitute the elements of fire protection installed in the ventilation and/or air-conditioning ducts and pipes passages through the walls, ceiling and floors.
  • Patent literature offers various cut off flap valves solutions working in auto and controlled mode. British patent claim nr GB 2 399 497 presents a cut off flap valve, placed outside a vent duct, equipped with a spring tightening device. The flap is kept in open position by the outer wall of the vent duct. The closure of the duct results from the fact that the heated vent duct loses its stiffness. The thrust of the flap on the wall of the vent duct, effected by a spring device results in progressing indenting of the wall of the vent duct until the flow is completely cut off.
  • European patent claim nr EP 0 829 689 presents a flap valve fitted axially in a narrowing inside the vent duct. The narrowing is constituted by a ring with a flap rotation axis fixed in a horizontal plane. Both the ring and the flap are formed in such a way that the flap when rotated by 90 deg., rests against a pitch /thread made in the ring. Additionally, flexible plates are fitted on the flap and the ring, sealing the flap in a closed position.
  • Another solution of the cut offflap valves construction is described in a Swedish patent SE 9003794 . A flap placed inside a body is fixed on an axis that is bent at the right angle as soon as leaves the body. A bent end of the axis extending outside rests against a fuse-link element that melts at high temperature and releases it allowing a spiral spring, placed in the axis of flap rotation to act. This arrangement causes the flap to rotate and to close the gas flow.
  • WO00/20803 discloses a control device for controlling flow of air through an opening having a rectangular body and comprising a flow control member (division) which moves between open and closed positions, closure means (e.g. spring attached to the body of the device) which can be moved between rest condition, in which the control member can move, and active condition, in which the closure means force the control member to remain in closed position; and sensing means detecting the hazard conditions (e.g. made of material susceptible to rise of temperature) acting on the closure means to move it from rest to active conditions. Said spring extends through the opening division and is attached to a bracket on the other side of the division with the help of said material susceptible to rise of temperature. The division is not provided with a flexible sealing ring nor any element providing smoke integrity. Furthermore the device docs not contain a thermally expanding gasket. In general, this document describes a device which is regarded as static fire damper, i.e. device which operates in static conditions, i.e. in which the ventilation (air conditioning) system is turned off in whole building after the fire is detected so there is no air flow in ducts and there no difference of pressure between isolated area where fire is detected and protected area of building.
  • US 4,858,517 discloses a dynamic fire damper having a cylindrical body comprising a self-closing division that is fixed inside the body and linked to the inside wall of the body by means of a closing spring device and is kept open by means of a releasing fuse link element. Both these elements are located inside the body and their planes of operation are perpendicular to the axis of the division.
  • Polish technical approval ITB-15-6622/2005 discloses dynamic fire damper, a device which operates in dynamic conditions, i.e. in which the ventilation (air conditioning) system is still running despite that there is a fire in certain areas of the building. The device described in said document contains a cylindrical body comprising a self-closing division that is fixed inside the body on an axis; closing spring device and a releasing fuse link element. The division is provided with a flexible sealing ring fixed in its circumference notch and cooperating with a thermally expanding gasket located on the inside wall of the body. The closing spring device includes a manual lever and a spring placed on a shaft being the axis of the division. The dosing spring device is placed outside of the cylindrical body. The fuse link is located inside the body but its plane of operation is not perpendicular to the axis of the division, but parallel. The operation of the releasing mechanism used in discussed document is completely different than the operation of the invention. Instead of simple releasing of the spring device, the operation of the closest prior art is based on use of a sophisticated and multi-part interlock mechanism.
  • The fire damper according to the current invention is composed of a cylindrical body comprising a self-closing division that is fixed inside the body on an axis via bearings. The division is linked to the inside wall of the body by means of a closing spring device and is kept in an open position by means of a releasing fuse link element. The division is also provided with a flexible sealing ring fixed in its circumference notch and cooperating with a thermally expanding gasket located on the inside wall of the body in a lateral plane corresponding to the closed position of the division. The fire damper of the invention is further defined by the characterizing part of claim 1.
  • Preferably, at least two rows of lengthwise holes protecting against heat conduction are provided on the body wall in the lateral plane corresponding to the closed position of the division.
  • Preferably, limit switches are placed inside the body for monitoring the position of the division.
  • The releasing fuse link device is preferably connected in series with an electromagnet providing a remote control for the division.
  • The body of the fire damper may he made in such a way that its diameter equals the diameter of vent duct.
  • The fire damper according to the invention is presented in an exemplary embodiment on the drawing, in which: fig. 1 presents a longitudinal semi-view and a semi-section of a nipple type fire damper according to the invention in a closed position; fig. 2 presents a longitudinal semi-view and a semi-section of a sleeve type cut off flap valve of the invention in a closed position open; fig. 3 presents a longitudinal view of the cut off flap valve with limit switches in a closed position. Fig. 4 presents a detail of the division in sectional view.
  • A division 6, made of a high temperature resistant metal is fixed diametrally on an axis 1 inside a circular body 5 via bearings 4. The division 6 is kept in an open position by a fuse-link releasing device 3. Additionally, the division 6 is linked to the body 5 with a spring closing device 2. The spring closing device 2 and the fuse-link releasing element 3 are fitted inside the body 5, their planes of operation being perpendicular to the axis 1 on which the division 6 has been fixed. The division 6 has a circumferential notch 10, in which a continuous flexible sealing ring 11 having a rectangular cross-section has been mounted that cooperates closely with a thermally expanding gasket 12 located inside the body on the body wall 5 in a lateral plane corresponding to the position of the division 6 in a closed position. Besides, at least two rows of lengthwise holes 13 are located on the body wall in a lateral plane corresponding to the position of the division 6 in order to prevent heat conduction along the body 5. The position of the division 6 may be monitored by limit switches 8, 9 placed inside the body 5. The switch limit 9 indicating the open position of the division 6 is installed on a bracket 7. The switch limit 8 indicates the closed position of the division 6.
  • The body 5 of the fire damper has a diameter similar to that of the vent duct which makes the installation fitting easier. The fire damper can be of two types. In the nipple version of the body 5, the vent duct endings enclose the body endings while in the sleeve type, the vent duct endings are inverted into the inside of the body 5. During regular operation of the vent installation, the fire damper is open. The area of a fire outbreak is being cut-off by the self-closure of the fire resisting division 6 due to temperature increase in the vent duct and the release of the fuse 3 that results in a release of the potential energy accumulated in the tensioned spring of the closing device 2. Optionally, an electromagnet may be connected in series to the release fuse device 3 that allows for the division 6 position to be remote controlled.

Claims (4)

  1. A fire damper, composed of a cylindrical body (5) comprising a self-closing division (6) that is fixed inside the body (5) on an axis (1) via bearings, the division (6) being linked to the inside wall of the body (5) by means of a closing spring device (2) and being kept in an open position by means of a releasing fuse link element (3), the division (6) being also provided with a flexible sealing ring (11) fixed in its circumference notch (10) and cooperating with a thermally expanding gasket (12) located on the inside wall of the body (5) in a lateral plane corresponding to the closed position of the division (6) characterized in that the flexible sealing ring (11) is continuous and has a rectangular cross-section, the closing spring device (2) and the releasing fuse link element (3) being located inside the body (5) connected to the same side of the body (5).
  2. A fire damper according to claim 1, wherein at least two rows of lengthwise holes (13) protecting against heat conduction are provided on the body wall (5) in the lateral plane corresponding to the closed position of the division (6)
  3. A fire damper according to claim 1, wherein limit switches (8,9) are placed inside the body (5) for monitoring the position of the division (6).
  4. A fire damper according to claim 1, wherein the releasing fuse link (3) is connected in series with an electromagnet providing a remote control for the division (6).
EP06460001.8A 2005-10-27 2006-01-17 Fire damper Revoked EP1779901B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06460001T PL1779901T3 (en) 2005-10-27 2006-01-17 Fire damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL377875A PL205587B1 (en) 2005-10-27 2005-10-27 Fire protection cut off flap

Publications (3)

Publication Number Publication Date
EP1779901A2 EP1779901A2 (en) 2007-05-02
EP1779901A3 EP1779901A3 (en) 2010-03-10
EP1779901B1 true EP1779901B1 (en) 2015-04-01

Family

ID=37808001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06460001.8A Revoked EP1779901B1 (en) 2005-10-27 2006-01-17 Fire damper

Country Status (2)

Country Link
EP (1) EP1779901B1 (en)
PL (2) PL205587B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008000689U1 (en) * 2008-01-18 2008-03-27 Trox Gmbh Fire damper
DE202008006786U1 (en) 2008-05-19 2008-10-23 Trox Gmbh Fire damper
DE102009011133A1 (en) * 2009-03-03 2010-09-16 Schako Klima Luft Ferdinand Schad Kg Zweigniederlassung Kolbingen Fitting for a ventilation system
DE102010056392B4 (en) * 2010-12-28 2015-02-19 Gert Bartholomäus One-sided hinged fire damper with improved sealing effect
ITVI20120304A1 (en) * 2012-11-12 2014-05-13 Mp3 S R L SUPPORT STRUCTURE FOR FIRE RESISTANT DAMPER AND FIRE RESISTANT DAMPER INCLUDING THIS SUPPORT STRUCTURE
CN103994263B (en) * 2014-05-28 2018-08-17 靖江市八达暖通设备制造有限公司 A kind of manual band Electric Actuator of anti-fire smoke expelling valve
KR102551777B1 (en) * 2021-02-06 2023-07-04 신승용 The duct pipe connector for the fire diffusion prevention equipped with the fireproof insulation damper

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523322A1 (en) 1975-05-27 1976-12-09 Trox Gmbh Geb Air conditioning fire prevention lock - has pivotable flap with ports alignable with apertures in wall of air duct
US4858517A (en) 1988-06-08 1989-08-22 Rick Coker Fire damper kit
US4958687A (en) 1988-12-15 1990-09-25 Daito Tech Kabushiki Kaisha Fire damper
DE19857280C1 (en) 1998-12-11 2000-08-31 Max Romacker Vent line shutoff for building fires controls valve movement by holder as soldered link which melts with heat to actuate pre-tensioned spring and close fireproofly rimmed valve.
DE10104923C1 (en) 2001-01-25 2002-10-02 Lta Lufttechnische Komponenten Fireproof flap for ventilation systems such as ventilation ducts in buildings, has flap leaf which consists of perforated plate on both sides and filled with insulating material
EP1302220A1 (en) 2001-10-09 2003-04-16 Gebrüder Trox, Gesellschaft mit beschränkter Haftung Damper, in particular fire damper
WO2003104721A1 (en) * 2002-06-11 2003-12-18 Fläkt Woods AB Method for manufacturing a ventilation closing plate and a closing plate
EP1506796A1 (en) 2003-08-14 2005-02-16 Gebrüder Trox, GmbH Fire damper

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146048A (en) 1977-05-02 1979-03-27 Prefco Productions, Inc. Fire damper and method of fabrication
FR2445427A1 (en) * 1978-12-29 1980-07-25 Dupuy Claude Double acting swing door retainer and release - holds door open until actuated via blown thermal fuse by fire alarm
SE467341B (en) * 1990-11-28 1992-07-06 Blomdahls Mekaniska Ab ELDSPJAELL
FI89333C (en) * 1991-08-23 1993-09-27 Halton Oy Fire limiter and method of locking the closure means by the fire limiter
FR2753104B1 (en) 1996-09-11 1998-10-30 Aldes Aeraulique SEALING SYSTEM FOR A VENTILATION DUCT BLOCKING DEVICE, IN PARTICULAR FOR A FIRE-FIGHTING VALVE OR SMOKE EXHAUST
GB9821450D0 (en) 1998-10-03 1998-11-25 Gatley Richard Flow control means
GB2399497A (en) 2003-03-18 2004-09-22 Rivermill Construction A fire damper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523322A1 (en) 1975-05-27 1976-12-09 Trox Gmbh Geb Air conditioning fire prevention lock - has pivotable flap with ports alignable with apertures in wall of air duct
US4858517A (en) 1988-06-08 1989-08-22 Rick Coker Fire damper kit
US4958687A (en) 1988-12-15 1990-09-25 Daito Tech Kabushiki Kaisha Fire damper
DE19857280C1 (en) 1998-12-11 2000-08-31 Max Romacker Vent line shutoff for building fires controls valve movement by holder as soldered link which melts with heat to actuate pre-tensioned spring and close fireproofly rimmed valve.
DE10104923C1 (en) 2001-01-25 2002-10-02 Lta Lufttechnische Komponenten Fireproof flap for ventilation systems such as ventilation ducts in buildings, has flap leaf which consists of perforated plate on both sides and filled with insulating material
EP1302220A1 (en) 2001-10-09 2003-04-16 Gebrüder Trox, Gesellschaft mit beschränkter Haftung Damper, in particular fire damper
WO2003104721A1 (en) * 2002-06-11 2003-12-18 Fläkt Woods AB Method for manufacturing a ventilation closing plate and a closing plate
EP1506796A1 (en) 2003-08-14 2005-02-16 Gebrüder Trox, GmbH Fire damper

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "APROBATA TECHNICZA ITB AT-15-2200/2001", ITB, 1 July 2001 (2001-07-01), pages 1,16 - 17, XP055362111
ANONYMOUS: "APROBATA TECHNICZNA ITB AT-15-5931/2003", ITB, 1 April 2003 (2003-04-01), pages 1-2,4 - 5,36-39, XP055362107
ANONYMOUS: "APROBATA TECHNICZNA ITB AT-15-6009/2005", ITB, 1 February 2005 (2005-02-01), pages 1 - 2,21-22,27-28, XP055259867
ANONYMOUS: "APROBATA TECHNICZNA ITB AT-15-6009/2005", ITB, 1 July 2005 (2005-07-01), pages 1,3 - 8,18,32-33, XP055362092
ANONYMOUS: "APROBATA TECHNICZNA ITB AT-15-6622/2005", ITB, 1 February 2005 (2005-02-01), pages 1,15 - 19, XP055362097
CATALOGUE OF THE COMPANY TROX AUSTRIA ''FIRE DAMPERS'' NO. 1/2005, 22 November 2011 (2011-11-22), XP055260847

Also Published As

Publication number Publication date
PL205587B1 (en) 2010-05-31
PL1779901T3 (en) 2015-08-31
PL377875A1 (en) 2007-04-30
EP1779901A2 (en) 2007-05-02
EP1779901A3 (en) 2010-03-10

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