EP3863734A1 - Dispositif de blocage pour un clapet coupe-feu, système de dispositif de blocage et procédé de blocage d'une direction d'entraînement - Google Patents

Dispositif de blocage pour un clapet coupe-feu, système de dispositif de blocage et procédé de blocage d'une direction d'entraînement

Info

Publication number
EP3863734A1
EP3863734A1 EP19778871.4A EP19778871A EP3863734A1 EP 3863734 A1 EP3863734 A1 EP 3863734A1 EP 19778871 A EP19778871 A EP 19778871A EP 3863734 A1 EP3863734 A1 EP 3863734A1
Authority
EP
European Patent Office
Prior art keywords
wrap spring
blocking device
receiving element
holding device
holding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19778871.4A
Other languages
German (de)
English (en)
Other versions
EP3863734B1 (fr
Inventor
Beat Kälin
Andreas Pally
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.)
Siemens Schweiz AG
Original Assignee
Siemens Schweiz AG
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 Siemens Schweiz AG filed Critical Siemens Schweiz AG
Publication of EP3863734A1 publication Critical patent/EP3863734A1/fr
Application granted granted Critical
Publication of EP3863734B1 publication Critical patent/EP3863734B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/12—Hinged dampers

Definitions

  • the present invention relates to a blocking device, in particular for a fire damper. Furthermore, the invention relates to a blocking device system that contains the blocking device and an associated method.
  • wrap springs have generally been used as one-way clutches.
  • all fire protection regulations should be able to be met and the blocking device should in particular also block when a drive device actuating the drive element is no longer functional or no longer available, for example because it has melted in a fire.
  • an associated blocking device system and an associated method are to be specified.
  • a blocking device in particular for a fire damper, is specified to achieve the object.
  • the blocking device has:
  • a receiving element rotatable in the holding device about an axis of rotation with a through opening, the through axis of which runs parallel, in particular coaxially, to the direction of the axis of rotation,
  • a wrap spring of the blocking device which is mechanically prestressed in the holding device and whose at least one turn is arranged around the receiving element
  • thermocouple made of a material that has a lower melting temperature than the material with the lowest melting temperature in the holding device and / or as the melting temperature of the material of the wrap spring
  • the at least one thermocouple holds at least one end of the wrap spring with respect to the holding device in the pretensioned state such that the receiving element can be freely rotated about the axis of rotation in both drive directions and that the receiving element in the relaxed state of the wrap spring in the triggered state of the at least one thermal fuse in one of the two drive directions is blocked.
  • thermocouple can also be characterized as a fastening device.
  • thermocouple When the thermocouple is triggered, especially in the event of a fire, the thermocouple material melts and loses its mechanical strength. However, the other load-bearing components of the blocking device continue to function as before. In normal operation, ie in the untripped state of the thermocouple, the thermocouple has such a high mechanical strength that one end of the Wrap spring or both ends of the wrap spring with respect to the holding device in the biased state who the.
  • This combines the freewheel principle with a wrap spring with a thermal activation of the freewheel function or the func on of blocking in the blocking direction.
  • a trigger mechanism for the locking function of the freewheel can be activated in a simple manner based solely on the material parameters.
  • the thermocouple can be made from a plastic material or from a solder with a melting temperature lower than 400 degrees Celsius.
  • the holding device can preferably be made of steel and / or at least one sintered material. This makes it easy to ensure the difference in melting temperatures. Steel and sintered materials typically have melting temperatures greater than 1000 degrees Celsius.
  • the wrap spring can also preferably be made of steel.
  • the receiving element can also be made from a sintered material. This ensures that, in the event of a fire, the thermocouple melts, which activates the locking function and the free-wheeling function of the wrap spring, but the other load-bearing components of the blocking device can continue to perform their function unchanged.
  • the difference in melting temperatures can be at least 200 degrees Celsius, at least 500 degrees Celsius or at least 1000 degrees Celsius. This ensures that the blocking function is triggered safely in the event of a fire.
  • the functional principle can also be used for other applications, for example, as overload protection when a device overheats
  • the holding device can contain at least two plates which are spaced apart from one another, each through openings in the area of the axis of rotation.
  • the holding device can contain at least one spacer element, preferably a plurality of cylindrical spacer elements, by means of which the plates are arranged at a distance from one another which is defined by the at least one spacer element.
  • Fixing holes are preferably provided in both plates, in particular in otherwise identical plates, or at least in one of the plates, with which the blocking device can be mounted, in particular on a ventilation system, ventilation or venting, for example. Through holes for screws.
  • One of the plates can contain a circular through opening in which the receiving element is mounted, preferably with a plain bearing.
  • the plain bearing is easy and inexpensive to implement.
  • the recording element can go through completely and be supported with its other end in the other plate, again in particular by a plain bearing.
  • the Hal teelement explained below would not be required.
  • This alternative can be used if only one end of the wrap spring is pretensioned in a thermocouple and the other end is fixed, for example, on the holding device.
  • the blocking device can contain a holding element, which is preferably hollow-cylindrical or essentially hollow-cylindrical and which is preferably fixedly mounted at one end in an opening of the other plate, in particular not rotatable.
  • the holding element can be surrounded by at least one turn of the wrap spring.
  • the holding element can be dimensioned such that a part of the relaxed wrap spring lies securely around the holding element due to the reduction in its inner diameter, so that the other part on the receiving element can perform the free-wheeling function with locking function.
  • This variant can also be used if both ends of the wrap spring are prestressed in the thermocouple and are exposed after the thermocouple has melted.
  • the holding element can be formed at its other end as a counter bearing for the rotatable receiving of the receiving element, in particular as a plain bearing.
  • a recessed or concave edge in the circumferential direction or the so-called undercut can be formed on a projection. Projections created by the undercuts can overlap as seen in the radial direction, so that there is a secure positive fit, which ensures a good hold in the radial direction and in the axial direction.
  • a recessed or concave edge or undercut can be formed on a respective projection in the circumferential direction. This ensures a secure hold and good storage as a plain bearing or as a fixed bearing.
  • the positive connection offers a good hold in the radial direction and in the axial direction.
  • the receiving element When viewed in the direction of the axis of rotation, the receiving element can have the same length as the length of the holding device. Alternatively, these lengths can differ by a maximum of 30 percent based on the sum of both lengths.
  • the result is a holding element with a sufficiently large holding surface for the relaxed wrap spring with a sufficiently large receiving element for a drive shaft. Also on the receiving element, the contact surface for the relaxed wrap spring is large enough to fulfill the free-wheeling function and the locking function.
  • the receiving element can have a smaller outside diameter compared to the outside diameter of the holding device, preferably an outer diameter which is smaller in the range from 0.1 millimeter to 0.5 millimeter. On the one hand, this enables the relaxed wrap spring to be held securely on the holding element and, on the other hand, it is not held too firmly on the receiving element for the drive shaft.
  • the receiving element can have an opening with a square cross section, a triangular cross section or a cross section with more than four corners transverse to the axis of rotation.
  • a drive shaft with a suitable counter shape can thus engage in the receiving element in a rotationally secure manner.
  • Round cross-sections and round drive shafts can also be used, however, if other measures ensure that they cannot rotate.
  • the wrap spring may contain at least 5 or at least 10 turns, preferably less than 25 turns.
  • the result is simple manufacture with a safe freewheel and locking function.
  • the ends of the wrap spring can be biased in the range from 5 degrees to 45 degrees to each other. For the movement of the ends when the wrap spring is released, only a small installation space is therefore required.
  • the wrap spring can have a square cross section, a rectangular cross section or a circular cross section have and is therefore easy to set up.
  • the wrap spring can be a coil spring with coils lying close together, which enables a compact design. Alternatively, gaps between adjacent turns can be arranged.
  • At least one thermocouple or both thermocouples can be held between the plates.
  • At least one thermocouple can have an elongated shape compared to its largest lateral dimension, i.e. it preferably has a length that is at least three times or at least five times longer than the largest lateral dimension of the thermocouple.
  • thermocouple can also be used on its own because it can also be supplied as a single part.
  • a blocking device system in which the blocking device according to the first aspect or its developments is arranged on a drive element on at least one fire damper.
  • the fire damper can work as a fire damper, which should be kept closed as far as possible and must never be opened again.
  • the fire protection flap is an additional element to a ventilation flap in the same ventilation duct, the ventilation flap being used to control or regulate an air flow.
  • the fire damper on the other hand, is only activated in the event of a fire or for inspection purposes. Alternatively, in normal operation, the fire damper can work as a ventilation flap that controls or regulates an air flow for ventilation or ventilation.
  • a drive device can be arranged on the drive element, which has a housing made of a material that has a melting temperature lower than 800 degrees Celsius or lower than 600 degrees Celsius, in particular containing aluminum or consisting of aluminum or an aluminum alloy. Even if that
  • the drive device closes the fire damper, for example, within 15 seconds of the power failure.
  • a return spring of the drive device can then still offer a holding torque. If the drive device itself, for example due to destruction by a fire, no longer develops a holding torque that holds the fire damper shut, then the safe locking is provided by the blocking device, as has been explained in detail above. This prevents smoke from spreading in the building ventilation system and does not endanger the lives of people in rooms that are away from the fire.
  • a method for blocking a drive direction is specified, in particular for blocking a drive direction in a drive element for a fire damper.
  • a wrap spring is arranged around a drive shaft which is driven by a drive unit. The following also applies:
  • the wrap spring is or is biased using at least one thermocouple
  • thermocouple is intended to decrease or melt its strength in the event of a fire or in the event of overheating of a machine, and the prestressed wrap spring would thereby relax, the material of the thermocouple has a lower melting temperature compared to the melting temperature of the wrap spring,
  • the relaxed wrap spring has a smaller inner diameter than the pretensioned wrap spring
  • the drive shaft can be brought into mechanical operative connection with at least one fire damper.
  • the fire damper is an additional element to a ventilation flap in the same ventilation duct, the ventilation flap being used to control or regulate an air flow.
  • the fire damper on the other hand, is only activated in the event of a fire or for inspection purposes.
  • the fire damper can operate in normal operation as a ventilation flap that controls or regulates an air flow for ventilation.
  • the fire damper is locked securely in a simple manner by the functional principle used, ie thermal activation of a wrap spring freewheel with a block in the opposite direction. A complete closing of the flap is still possible, but opening the flap is counteracted.
  • a clutch with temperature-dependent unidirectional locking function for fire damper is described.
  • the flap is closed by a drive within 15 seconds in the event of a fire.
  • the drive usually burns in the following 2 minutes to 60 minutes, for example. All parts that are not made of steel melt and fall off the folding shaft. Without a drive on the flap shaft, there is no holding torque on the flap and the flap could open unintentionally. The unwanted opening of a flap in the event of a fire must be prevented.
  • a metal spring wedge could be pivoted onto the metal segment by means of a “fuse”.
  • the wedge geometry would then have to be designed in such a way that the segment can still close at any time, but can no longer open.
  • the solution can also be carried out separately from the actuator.
  • the proposed clutch with temperature-dependent unidirectional locking function is pushed onto the damper shaft and fixed to the damper housing.
  • the clutch allows bidirectional movement in normal operation by the actuator.
  • the plastic of the "thermal fuse" of the coupling melts away.
  • the wrap spring closes and the clutch can only be turned in one direction.
  • the wrap spring blocks the rotary movement in the opposite direction.
  • FIGS. 2 and 3 show the coupling with an unidirectional locking function.
  • the coupling is already mounted and fixed on the damper.
  • the actuator is mounted on the damper and also on the clutch.
  • the architecture or the materials of the actuator used are free of the "locking function" or the locking function.
  • the flap remains locked. This can save manufacturing costs for the actuator.
  • the new coupling with temperature-dependent unidirectional locking function can be purchased by the customer as an additional module. If the function is required, he buys it. Otherwise it saves the expenses for an unnecessary function.
  • FIG. 1 shows a basic sketch of a system with a blocking device or coupling
  • FIG. 2 shows a blocking device in an oblique view
  • Figure 3 shows a cross section through that shown in Figure 2
  • FIG 5 shows the blocking device system with an actuator unit mounted on the damper.
  • Figure 1 shows a schematic diagram of a Blockingvorrich processing system 1 with blocking device 10 or clutch.
  • the blocking device system 1 is, for example, part of a comprehensive technical building infrastructure, which is controlled, for example, according to the BACnet (Building Automation and Control Networks) standard.
  • the blocking device 10 can also be referred to as a thermally switched freewheel device or clutch.
  • the blocking device system 1 further includes:
  • a fire damper 114 may be arranged in the ventilation duct 110, for example if a longitudinal section through the ventilation duct is shown, see arrow 116, which indicates air movement in this case.
  • the fire damper 114 can For example, have a square or circular shape, the cross section of the ventilation duct 110 is adjusted accordingly.
  • ventilation flaps (not shown) can be arranged in the ventilation duct 110, which are used to control or regulate an air flow during normal operation of the ventilation system, ie if there is no fire in a building, in an underground car park or in a building other building infrastructure is available.
  • Fire protection flaps 114, 120 may be arranged, for example if the ventilation duct 110 is shown in cross section in FIG. 1, in this case see arrow 122, which indicates an air flow which is directed toward the viewer. The same applies to ventilation duct 110 accordingly.
  • Actuator device 100 may include a single-stage or multi-stage transmission 120 that is driven by the motor, see arrow 122.
  • the transmission output of the transmission is connected to drive shaft 112, see arrow 124.
  • the following components of the blocking device 10 are arranged in an open housing or in a holding device 150:
  • thermocouple 140 alternatively several thermocouples 140, 142nd
  • thermocouple 140 receives the ends 132, 134 of the looping of the 130, the looping spring 130 being pretensioned, which increases its inner diameter somewhat in comparison to the relaxed state, so that in normal operation an essentially unimpeded rotation of the drive shaft in both directions of drive or Direction of rotation 160 and 170 take place can. In normal operation, there is therefore no blockage 180 in the opposite direction or in the direction of rotation 170.
  • thermocouple 140 Regarding the functional principle of the blocking device 10 in a fire, reference is made to the introduction, in particular to the melting of the thermocouple 140 or the thermocouples 140, 142. On the mechanical relaxation of the
  • Diameter and the freewheel effect in the direction of rotation 160 i.e. in a direction of rotation in which the fire damper 114, 120 is closed and the blockage 180 in the opposite direction 170, i.e. in a direction of rotation in which the fire protection flap 114, 120 would have to be opened.
  • FIG. 1 also shows an axis of rotation A about which the drive shaft 112 rotates, which has a suitable cross-sectional shape transverse to the axis of rotation. Furthermore, a radial direction R with respect to the axis of rotation A is shown.
  • FIG. 2 shows a blocking device 10b in an oblique view.
  • the blocking device 10b is a special configuration of the blocking device 10 and contains, for example:
  • thermocouple 140b as a special embodiment of the
  • Thermocouple 140 Thermocouple 140.
  • the housing or the holding device 150 is now designed as an open housing with:
  • the installation direction can be selected according to the requirements.
  • a receiving element 230 can be seen, which receives the drive shaft 112 or another drive shaft.
  • the receiving element 230 is explained in more detail with reference to FIG 3.
  • a holding element 240 can be seen, which is firmly connected to the lower housing plate 202 and on which the receiving element 230 and in the relaxed state of the wrap spring 130b also the loop of the 130b is held or stored.
  • the holding element 240 is also explained in more detail below with reference to FIG. 3.
  • FIG. 2 also shows a through opening 250 through which the drive shaft 112 can extend through the entire blocking device 10b.
  • a distance AS lies between the housing plates 200 and 202 and is set by the spacer elements 208.
  • FIG. 3 shows a cross section through the blocking device shown in FIG. 2 along the sectional plane 3-3 according to FIG. 2.
  • thermocouple 140b A longitudinal groove 300 in the thermocouple 140b can be clearly seen.
  • the two ends 132 and 134 are supported in the longitudinal groove 300, the wrap spring 130b being pretensioned.
  • only one end 132 or 134 can be stored in the thermocouple 140b.
  • the other end is then curved, for example in the other direction compared to the direction of curvature shown in FIG. 3, and is fixed on the lower housing plate 202 in the case of the end 132 or on the upper housing plate in the case of the end 134, for example. in an opening or hole to be provided.
  • two thermocouples are provided, each receiving one end 132 or 134 of the wrap spring 130b.
  • the receiving element 230 is essentially cylindrical with an opening 320, which in the example can accommodate a square drive shaft 112 or 112b, in particular with a square cross section.
  • the receiving element 230 has a circumferential concave edge or undercut Kl at its upper edge and a circumferential concave edge or undercut K2 at its lower edge or end. By the edge Kl an inner projection is formed, the plate 200 is mounted with a sliding fit in the through hole 201 of the upper housing.
  • the holding element 240 is in the form of a hollow cylinder or essentially in the shape of a hollow cylinder with an inner diameter which corresponds to the inner diameter on the receiving element 230.
  • the holding element 240 has an upper circumferential concave edge or undercut K3 at its upper edge and a circumferential concave edge or undercut K4 at its lower edge or end. By the edge K4, an inner jump is formed, which is fixed, for example. With a press fit or even welded, is mounted in the opening 203 of the lower housing plate 202.
  • edge K2 an inner projection is formed, which is mounted with a sliding fit on the holding element 240 and overlaps with an outer projection on the holding element 240 in ra dialer direction R, the projection being formed by the edge K3.
  • thermocouple 140b is received in the lower housing plate 202 in a lower receiving opening 302 and in the upper housing plate 200 in a receiving opening 304.
  • the mentioned design information ie the outer diameter Dl of the receiving element 230 can be selected slightly smaller than the outer diameter D3 of the holding element 240.
  • a turn W of the wrap spring 130b is shown in FIG. 3.
  • the wrap spring 130b has approximately 12 windings W.
  • a length LI of the receiving element 230 is, for example, approximately or exactly the same as a length L2 of the holding element 240. The sum of the lengths LI and L2 corresponds, for example, approximately to the distance AS shown in FIG.
  • FIG. 4 shows the blocking device 10b or coupling mounted on a sheet of a damper.
  • a mounting plate 400 is, for example, part of a ventilation duct 110 or part of a housing for one or more fire dampers 114, 120.
  • the blocking device 10b is screwed onto the mounting plate, for example with screws, which are also inserted through the holes 203.
  • FIG. 5 shows the blocking device system 1 with an actuator unit 500 mounted on the damper.
  • the actuator unit 500 contains, for example, two housing halves 502, 504, which are made, for example, of aluminum or an aluminum alloy.
  • the housing halves 502, 504 contain in particular the units explained with reference to FIG. Motor M, gear 120, possibly also an electronic control unit.
  • a connection or control line 510 supplies the actuator unit 500 with an operating voltage and / or with suitable control signals for actuating the motor M, i.e. to open and close the fire damper (s) 114,
  • a fastening element 520 serves to fasten the actuator unit 500 on the drive shaft 112b.

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)

Abstract

L'invention concerne un dispositif de blocage (10, 10b), en particulier pour un clapet coupe-feu (114, 120), comprenant un dispositif de maintien (150), un élément de réception (230) monté dans le dispositif de maintien de manière à pouvoir tourner autour d'un axe de rotation (A) et doté d'une ouverture de passage dont l'axe de passage s'étend coaxialement ou parallèlement à la direction de l'axe de rotation, et un ressort enroulé (130, 130b) du dispositif de blocage, qui est maintenu avec précontrainte mécanique dans le dispositif de maintien et dont l'au moins une spire (W) est disposée autour de l'élément de réception. Le dispositif de blocage comprend en outre un thermocouple (140, 42), fabriqué dans un matériau ayant une température de fusion inférieure à celle du matériau ayant la température de fusion la plus basse dans le dispositif de maintien et/ou à la température de fusion du matériau du ressort enroulé. Le thermocouple maintient une ou les deux extrémités (132, 134) du ressort enroulé à l'état précontraint par rapport au dispositif de maintien, de sorte que l'élément de réception peut tourner librement dans les deux directions d'entraînement (160, 170) autour de l'axe de rotation et de sorte que dans l'état détendu du ressort enroulé, à l'état déclenché de l'au moins une sécurité thermique, l'élément de réception est bloqué dans l'une des deux directions d'entraînement (170).
EP19778871.4A 2018-10-11 2019-09-17 Dispositif de blocage pour un battant coupe-feu, système de dispositifs de blocage et procédé de blocage d'un dispositif d'entraînement Active EP3863734B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18199892.3A EP3636323A1 (fr) 2018-10-11 2018-10-11 Dispositif de blocage pour un battant coupe-feu, système de dispositifs de blocage et procédé de blocage d'un dispositif d'entraînement
PCT/EP2019/074831 WO2020074220A1 (fr) 2018-10-11 2019-09-17 Dispositif de blocage pour un clapet coupe-feu, système de dispositif de blocage et procédé de blocage d'une direction d'entraînement

Publications (2)

Publication Number Publication Date
EP3863734A1 true EP3863734A1 (fr) 2021-08-18
EP3863734B1 EP3863734B1 (fr) 2022-05-25

Family

ID=63833928

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18199892.3A Withdrawn EP3636323A1 (fr) 2018-10-11 2018-10-11 Dispositif de blocage pour un battant coupe-feu, système de dispositifs de blocage et procédé de blocage d'un dispositif d'entraînement
EP19778871.4A Active EP3863734B1 (fr) 2018-10-11 2019-09-17 Dispositif de blocage pour un battant coupe-feu, système de dispositifs de blocage et procédé de blocage d'un dispositif d'entraînement

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP18199892.3A Withdrawn EP3636323A1 (fr) 2018-10-11 2018-10-11 Dispositif de blocage pour un battant coupe-feu, système de dispositifs de blocage et procédé de blocage d'un dispositif d'entraînement

Country Status (3)

Country Link
US (1) US11957943B2 (fr)
EP (2) EP3636323A1 (fr)
WO (1) WO2020074220A1 (fr)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580321A (en) * 1969-04-25 1971-05-25 Ruskin Mfg Co Smoke damper
US4161204A (en) * 1977-09-14 1979-07-17 Kurz John C Motorized smoke and fire damper
US4334570A (en) * 1980-09-22 1982-06-15 Reed National Corp. Fire and smoke damper
US4545363A (en) * 1984-07-05 1985-10-08 Safe-Air Inc. Ventilation damper control system
US4581987A (en) * 1985-05-30 1986-04-15 Ecm Motor Co. Fire damper actuator
GB2185307B (en) * 1986-01-10 1989-11-08 Hunter Int Ltd Improvements in or relating to a damper
DE4234800A1 (de) * 1992-10-15 1994-04-21 Schako Metallwarenfabrik Luftführungskanal mit einer eingesetzten Brandschutzklappe
DE19636350A1 (de) * 1995-08-31 1997-04-17 Schoettler Lunos Lueftung Brandschutzeinrichtung
JPH11294163A (ja) * 1998-04-07 1999-10-26 Nippon Thermostat Kk 内燃機関の冷却制御装置
AU2003900610A0 (en) * 2003-02-11 2003-02-27 Truss Holdings Pty Ltd Fire collar
DE102005043109A1 (de) * 2005-09-10 2007-03-29 Werner Wildeboer Auslöseeinrichtung zum Auslösen zumindest eines eine Leitung eines lufttechnischen Systems verschließenden Absperrelementes
GB2468292A (en) * 2009-03-02 2010-09-08 Tri Air Innovations Ltd Damper with spring clutch to permit or prevent movement of the damper blade by relative position of spring legs on the spring clutch.
EP2870415B1 (fr) * 2012-07-09 2019-05-01 Amrish Chopra Système d'actionnement à sécurité intégrée
CH709378A1 (de) * 2014-03-12 2015-09-15 Belimo Holding Ag Blockiervorrichtung für Klappenantrieb.
ES2971529T3 (es) * 2019-12-13 2024-06-05 Trox Gmbh Geb Compuerta cortafuegos

Also Published As

Publication number Publication date
US20210353985A1 (en) 2021-11-18
US11957943B2 (en) 2024-04-16
EP3636323A1 (fr) 2020-04-15
EP3863734B1 (fr) 2022-05-25
WO2020074220A1 (fr) 2020-04-16

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