GB2515649A - Fire resistant downlight - Google Patents

Fire resistant downlight Download PDF

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Publication number
GB2515649A
GB2515649A GB201410152A GB201410152A GB2515649A GB 2515649 A GB2515649 A GB 2515649A GB 201410152 A GB201410152 A GB 201410152A GB 201410152 A GB201410152 A GB 201410152A GB 2515649 A GB2515649 A GB 2515649A
Authority
GB
United Kingdom
Prior art keywords
tubular body
fire resistant
cover plate
recessed downlight
intumescent material
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
GB201410152A
Other versions
GB2515649B (en
GB201410152D0 (en
Inventor
Wen Tao Kuang
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.)
KOSNIC UK Ltd
Original Assignee
KOSNIC UK Ltd
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 KOSNIC UK Ltd filed Critical KOSNIC UK Ltd
Priority to GB1410152.1A priority Critical patent/GB2515649B/en
Publication of GB201410152D0 publication Critical patent/GB201410152D0/en
Publication of GB2515649A publication Critical patent/GB2515649A/en
Application granted granted Critical
Publication of GB2515649B publication Critical patent/GB2515649B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/12—Flameproof or explosion-proof arrangements
    • F21V25/125—Flameproof or explosion-proof arrangements using intumescent material, i.e. using materials which swells up as a result of heat exposure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes

Abstract

A fire resistant downlight 101 comprises a tubular body 102 having upper and lower ends 103, 104 defining upper and lower openings 105, 106 and a cover plate 107 spaced above and extending over the upper opening so that a gap G is defined between the cover plate 107 and the upper end of the tubular body 102. A layer of intumescent material 108 is disposed within the gap G, and has a depth that is less than the depth of the gap G such that a ventilation window is provided between the layer of intumescent material 108 and the upper end 103 of the tubular body 102. When the intumescent material is inactivated, cooling air can flow laterally through the ventilation window, and when the intumescent material is activated, the intumescent material expands to close the ventilation window.

Description

FIRE RESISTANT DOWNUGHT
Field of the Invention
The present invention relates to a fire-rated luminaire, in particular to a fire resistant recessed downlight comprising intumescent material.
Backqround of the Invention It is known for recessed downlights to be fitted into apertures formed in a fire-rated ceiling. The fire-rating of a ceiling indicates the time that it will take for fire to propagate through the ceiling to the floor above. A problem exists in that the provision of an opening in the ceiling for the recessed downlight invalidates the fire-rating of the ceiling. The recessed downlight aperture presents a fire hazard, and it is found that the edges of the opening encourage flames to rise up through the ceiling.
A ki-iown type of fire-rated recessed downlight comprises a canister body with an upper plate that defines at least one ventilation aperture therein, and intumescent material for sealing the ventilation aperture(s) in the upper plate of the canister body in the event of a fire, so that the fire rating of the ceiling can be maintained.
A first problem with this prior art fire-rated recessed downlight is that the cooling air flow path is limited to the ventilation aperture(s) defined in the upper plate of the canister body. A second problem exists in that it is known for installers of ceiling insulation to lay a sheet of insulation over a recessed downlight, rather than fitting it properly around the recessed downlight. Covering the prior art fire-rated recessed downlight with insulation blocks the ventilation aperture(s) in the upper plate of the canister body leading to early failure of the recessed downlight due to a lack of sufficient cooling.
Summanj of the Invention According to a first aspect there is provided a fire resistant recessed downlight comprising: a tubular body having upper and lower ends defining upper and lower openings respective'y, a cover plate spaced above and extending over the upper opening of said tubular body such that a gap is defined between the cover plate and the upper end of the tubular body, and a layer of intumescent material disposed within the gap between the cover plate and the upper end of the tubular body, said layer of intumescent material when inactivated having a depth that is less than the depth of said gap such that a ventilation window is provided between said layer of intumescent material and the upper end of said tubular body; whereby, when said intumescent material is inactivated, cooling air can flow laterally through the ventilation window and, when said intumescent material is activated, said intumescent material expands to close said ventilation window.
In an embodiment, the cover plate extends beyond the perimeter of the upper opening of the upper end of the tubular body. In an embodiment, the layer of intumescent material extends beyond the perimeter of the upper opening of the upper end of the tubular body.
In an embodiment, the layer of intumescent material is secured to the underside of the cover plate.
In an embodiment, the tubular body and the cover plate are each fabricated from a fire-resistant metal material. In an example, the fire-resistant metal material is steel.
In an embodiment, the tubular body has a cross-sectional area perpendicular to the length between the upper and lower ends that varies along the length between the upper and lower ends.
In an embodiment, the upper opening of the tubular body is smaller than the lower opening.
In an embodiment, the cover plate is held in fixed relation to the tubular body by at least one bridge member. In an example, the cover plate is held in fixed relation to the tubular body by a pair of oppositely arranged bridge members.
In an embodiment, the fire resistant recessed down!ight comprises a pair of installation spring clips. In an example the cover plate is held in fixed relation to the tubular body by a pair of oppositely arranged bridge members, and each of the pair of installation spring clips is secured to a respective one of the pair of oppositely arranged bridge members.
In an embodiment, the lower end of the tubular body comprises an outwardly extending installation flange.
In an embodiment, a lamp holder is secured to the underside of the cover plate.
Different aspects and embodiments of the invention may be used separately or together.
Further particular and preferred aspects of the present invention are set out in the accompanying independent and dependent claims. Features of the dependent claims may be combined with the features of the independent claims as appropriate, and in combination other than those explicitly set out in the claims.
Brief Description of the Drawinqs
The present invention will now be more particularly described, with reference to the accompanying drawings, in which: Figure 1 shows an exp'oded view of a fire resistant recessed downlight embodying the present invention; Figures 2 and 3 illustrate ventilation features of the assembled fire resistant recessed downlight of Figure 1; Figure 4 illustrates the assembled fire resistant recessed dowTllight of Figure 1 following a high temperature event; and Figure 5 shows the fire resistant recessed dolight of Figure 1 installed in a ceiling.
Descrintion Example embodiments are described below in sufficient detail to enable those of ordinary skill in the art to embody and implement the systems and processes herein described. It is important to understand that embodiments can be provided in many alternate forms and should not be construed as limited to the examples set forth herein.
is An exploded view of a fire resistant recessed downlight 101 is shown in Figure 1.
The recessed downlight 101 comprises a tubular body 102 having upper and lower ends 103, 104 respectively defining upper and lower openings 105, 106 respectively. The recessed downlight 101 further comprises a cover plate 107 spaced above and extending over the upper opening 106 of the tubular body 102 such that a gap G is defined between the cover plate 107 and the upper end 103 of the tubular body 102. The recessed downlight 101 further comprises a layer of intumescent material 108. When the recessed downlight 101 is assembled for use, the layer of intumescent material 108 is disposed within the gap G between the cover p'ate 107 and the upper end 103 of the tubular body 102. The layer of intumescent material 108 when inactivated has a depth that is less than the depth of the gap G such that a ventilation window is provided between the layer of intumescent material 108 and the upper end 103 of the tubular body 102. As will be described in further detail, when the intumescent material is inactivated, cooling air can flow laterally through the ventilation window and, when the intumescent material is activated, the intumescent material expands to close the ventilation window. As will also be described, the fire resistant recessed downlight 101 has improved ventilation features.
In this embodiment, the cover plate 107 extends beyond the perimeter of the upper opening 106 of the upper end 103 of the tubular body 102. In this embodiment also, when the recessed downlight 101 is assembled for use, the layer of intumescent material 108 extends beyond the perimeter of the upper opening 106 of the upper end 103 of the tubular body 102. With this arrangement, when the intumescent material 108 is activated and expands, it presents a sealing face having an area that is greater than that of the opening 106 of the upper end 103 of the tubular body 102 such that the expanded, activated intumescent material 108 abuts against the perimeter of the opening 106 of the upper end 103 of the tubular body 102 properly. In an embodiment, the layer of intumescent material 108 is disposed against the underside 109 of the cover plate 107. Any suitable retaining or securing means may be used as appropriate to maintain the layer of intumescent material 108 in position.
In an embodiment, the tubular body 102 and cover plate 107 are each fabricated from a fire-resistant metal material. In an example, the fire-resistant metal material is steel. It is to be appreciated however that components of the fire resistant recessed dolight 101 may be each be fabricated from any suitable material or combination of materials. The intumescent material may be any suitable type. The intumescent material may be asbestos based.
As can be seen in Figure 1, the cover plate 107 of fire resistant recessed downlight 101 is held in fixed relation to the tubular body 102 by at least one bridge member 110. In this illustrated embodiment, the cover plate 107 is held in fixed relation to the tubular body 102 by a pair of oppositely arranged bridge members 110, 111. In this embodiment, the fire resistant recessed downlight 101 comprises a pair of installation spring clips 112, 113. In the shown arrangement, each of the pair of oppositely arranged bridge members 110, 111 extends between the cover plate 107 and the external surface of said tubular body 102, and each of the pair of installation spring clips 112, 113 is secured to a respective one of the pair of oppositely arranged bridge members 110, 111. In the shown example. each of the bridge members 110, 111 extends downwardly from the perimeter of the cover plate 107 and is secured to the external surface of the tubular body 102. According to this illustrated embodiment, the lower end 104 of the tubular body 102 of the fire resistant recessed downlight 101 comprises an outwardly extending installation flange 114.
The fire resistant recessed downlight 101 further comprises a lamp holder 115.
In this embodiment, when the recessed downlight 101 is assembled, the lamp holder 105 is secured to the underside 109 of the cover plate 107. The lamp holder 115 is configured to hold a compatible lamp 116. It is to be appreciated that the tamp holder 115 and lamp 116 may be any suitable type.
The tubular body 102 of the fire resistant recessed downlight 101 may have any suitable shape and dimensions. According to this illustrated embodiment, the tubular body 102 has a cross-sectional area perpendicular to the length between the upper and lower ends 103, 104 that varies along the length between the upper and lower ends 103, 104. The upper and lower openings 105, 106 of the tubular body 102 of the fire resistant recessed downlight 101 may have any suitable shape, dimensions and arrangement. According to this illustrated embodiment also, the upper opening 106 of the tubular body 102 is smaller than the lower opening 105. The cover plate 107 may also have any suitable shape and dimensions. In this embodiment, the tubular body 102 has a circular cross-sectional shape, the cover plate 107 also has a circular shape, the cover plate 107 has a diameter that is greater than the diameter of the tubular body 102, and the cover plate 107 and the tubular body 102 are arranged concentrically.
It is to be appreciated that aesthetic, structural, installation and electrical wiring features of the fire resistant recessed downlight 101, and componentry thereof, or used therewith, may vary.
Ventilation features of the assembled fire resistant recessed downlight 101 are shown in Figures 2 and 3. In both of these Figures. it can be seen that a ventilation window A is provided between the inactivated layer of intumescent material 108 and the upper end 103 of the tubular body 102. It is to be appreciated that the ventilation window A is provided by the gap G between the cover plate 107 and the upper end 103 of the tubular body 102, in which the inactivated layer of intumescent material 108 is located.
In a specific example, the depth of the gap G between the cover plate 107 and the upper end 103 of the tubular body 102 of the recessed downlight 101 is approximately 12mm, the depth of the unactivated layer of intumescent material 108 is approximately 3mm, and the ventilation window A, between the unactivated layer of intumescent material 108 and the upper end 103 of the tubular body 102 has a depth of approximately 9mm.
A first cooling air flow path provided by the arrangement of the assembled fire resistant recessed downlight 101 is shown in Figure 2. Air can flow into the tubular body 102 through the lower opening 106 and upwards within the tubular body 102 towards the upper opening 105, in the direction indicated by arrow 201. As indicated by arrow 202, air can flow from within the tubular body 102 through the upper opening 105 and outwards through the ventilation window A. Thus, it can be seen from arrows 201 and 202 that the fire resistant recessed downlight 101 provides a flow path upwardly through the tubular body 102 and sideways outwardly through the ventilation window A. A second cooling air flow path provided by the arrangement of the assembled fire resistant recessed downlight 101 is shown in Figure 3. As indicated by arrows 301 and 302, air can flow from one side of the tubular body 102 to the other side of the tubular body 102, through the ventilation window A and across the upper opening 105 of the tubular body 102.
It is thus to be appreciated that the assembled fire resistant recessed downlight 101 allows upward flow due to the chimney effect and also allows lateral flow is through the ventilation window.
Preferably, and in this illustrated embodiment, the ventilation window A of the fire resistant recessed downlight 101 is annular and unobstructed, to maximise the available area through which cooling air can flow.
The fire resistant recessed downlight 101 thus provides improved ventilation, by increasing the air flow path volume through which air can flow and providing different air flow paths along which air can flow.
Figure 4 shows the fire resistant recessed downlight 101 following activation of the layer of intumescent material 108. Under increased temperature conditions due to fire below the ceiling in which the fire resistant recessed downlight 101 is installed, the layer of intumescent material 108 expands to close the ventilation window A shown in Figure 2 and 3. With the ventilation window blocked, the integrity of the ceiling is preserved and the spread of fire through the ceiling to the floor or space above is inhibited.
As previously mentioned, in this illustrated embodiment, the cover plate 107 and the layer of inactivated intumescent material 108, each extend beyond the perimeter of the upper opening 105 of the tubular body 102. As shown in Figure 4, the expanded, activated layer of intumescent material 108 is present on both the inside and the outside of the wall of the upper end 103 of the tubular is body 102, such that the intumescent material 108 is around the wall, to ensure an effective seal between the cover plate 107 and the upper end 103 of the tubular body 102.
The fire resistant recessed downlight 101 is shown installed in a ceiling 501 in Figure 5. In the illustrated scenario, a layer of insulation 502 has been laid over the top of the cover plate 107 of the recessed downlight 101. As can be seen, the ventilation window A beneficially remains open and is not shut by the overlaid insulation 502. Advantageously, as indicated by arrows 503 and 504, air can still flow outwardly of the tubular body 102 of the recessed downlight 101 through the upper opening 105 and the ventilation window A. Thus, in the event that an installer of ceiling installation fails to properly fit the installation around the recessed downlight 101, a degree of ventilation is still provided arid consequently the risk of the recessed dolight 101 failing due to overheating is reduced. In this way, the arrangement of the ventilation window A of the recessed downlight also serves to prolong the working life of the recessed downlight 101.
The fire resistant recessed downlight 101 thus offers improved ventilation and operational characteristics.
Although illustrative embodiments of the invention have been disclosed in detail herein, with reference to the accompanying drawings, it is understood that the invention is not limited to the precise embodiments shown and that various changes and modifications can be effected therein by one skilled in the art without departing from the scope of the invention as defined by the appended claims and their equivalents.

Claims (18)

  1. Claims 1. A fire resistant recessed downlight comprising: a tubular body having upper and lower ends defining upper and lower openings respectively, a cover plate spaced above and extending over the upper opening of said tubular body such that a gap is defined between the cover plate and the upper end of the tubular body, and a layer of intumescent material disposed within the gap between the cover plate and the upper end of the tubular body, said layer of intumescent material when inactivated having a depth that is less than the depth of said gap such that a ventilation window is provided between said layer of intumescent material and the upper end of said tubular body; whereby, when said intumescent material is inactivated, cooling air can flow is laterally through the ventilation window and, when said intumescent material is activated, said intumescent material expands to close said ventilation window.
  2. 2. A fire resistant recessed downlight as claimed in claim 1, wherein said cover plate extends beyond the perimeter of the upper opening of the upper end of said tubular body.
  3. 3. A fire resistant recessed downlight as claimed in claim 1 or claim 2, wherein said layer of intumescent material extends beyond the perimeter of the upper opening of the upper end of said tubular body.
  4. 4. A fire resistant recessed downlight as claimed in any preceding claim, wherein said layer of intumescent material is secured to the underside of said cover plate.
  5. 5. A fire resistant recessed downlight as claimed in any preceding claim wherein said tubular body and said cover plate are each fabricated from a fire-resistant metal material.
  6. 6. A fire resistant recessed downlight as claimed in claim 5, wherein said fire-resistant metal material is steel.
  7. 7. A fire resistant recessed downlight as claimed in any preceding claim, wherein said tubular body has a cross-sectional area perpendicular to the length between the upper and lower ends that varies along the length between the upper and lower ends.
  8. 8. A fire resistant recessed downlight as claimed in any preceding claim, wherein the upper opening of said tubular body is smaller than the lower opening.
  9. 9. A fire resistant recessed downlight as claimed in any preceding claim, wherein said tubular body has a circular cross-sectional shape.
  10. 10. A fire resistant recessed downlight as claimed in claim 9, wherein said cover plate has a circular shape.
  11. 11. A fire resistant recessed downlight as claimed in claim 10, wherein said cover plate has a diameter that is greater than the diameter of said tubular body and said cover plate and said tubular body are arranged concentrically.
  12. 12. A fire resistant recessed downlight as claimed in any preceding claim, wherein said cover plate is held in fixed relation to said tubular body by at least one bridge member.
  13. 13. A fire resistant recessed downlight as claimed in claim 12, wherein said cover plate is held in fixed relation to said tubular body by a pair of oppositely arranged bridge members.
  14. 14. A fire resistant recessed downlight as claimed in any preceding claim, comprising a pair of installation spring clips.
  15. 15. A fire resistant recessed downlight as claimed in daim 13 and claim 14, wherein each of said pair of oppositely arranged bridge members extends between said cover plate and the external surface of said tubular body, and each of said pair of installation spring clips is secured to a respective one of said pair of oppositely arranged bridge members.
  16. 16. A fire resistant recessed downlight as claimed in any preceding claim, wherein the lower end of said tubular body comprises an outwardly extending installation flange.
  17. 17. A fire resistant recessed downlight as claimed in any preceding claim, wherein a lamp holder is secured to the underside of said cover plate.
  18. 18. A fire resistant recessed downlight, substantially as described herein with reference to the accompanying drawings.
GB1410152.1A 2014-06-09 2014-06-09 Fire resistant downlight Active GB2515649B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1410152.1A GB2515649B (en) 2014-06-09 2014-06-09 Fire resistant downlight

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1410152.1A GB2515649B (en) 2014-06-09 2014-06-09 Fire resistant downlight

Publications (3)

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GB201410152D0 GB201410152D0 (en) 2014-07-23
GB2515649A true GB2515649A (en) 2014-12-31
GB2515649B GB2515649B (en) 2015-10-14

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016082026A1 (en) * 2014-11-26 2016-06-02 Jammbco Holdings Ltd Downlight firestop
WO2017140023A1 (en) * 2016-02-18 2017-08-24 常州斯莱海业照明电器有限公司 Recessed light fireproof structure and recessed light
CN107270142A (en) * 2017-07-08 2017-10-20 苏州瑞腾照明科技股份有限公司 A kind of fire prevention lighting device for LED lamp
US9803845B2 (en) 2014-11-26 2017-10-31 Ursatech Ltd. Downlight firestop
US9853267B2 (en) 2014-02-03 2017-12-26 Ursatech Ltd. Intumescent battery housing
GB2563040A (en) * 2017-05-31 2018-12-05 Luceco Plc Downlight assembly
GB2565125A (en) * 2017-08-03 2019-02-06 Aurora Ltd An adaptor for a light fitting
US10704751B2 (en) 2014-11-26 2020-07-07 Ursatech Ltd. Downlight firestop
US11794043B2 (en) 2019-12-10 2023-10-24 Ursatech Ltd. Ceiling fixture firestop

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2415245A (en) * 2004-06-18 2005-12-21 Scolmore Int Ltd Heat Resistant Casing
GB2422191A (en) * 2005-01-27 2006-07-19 Rd Europe Ltd Fire Resistant Light Fitting
GB2463796A (en) * 2008-09-29 2010-03-31 Robert Cole Light fitting
GB2466875A (en) * 2009-01-12 2010-07-14 Scolmore Int Ltd Heat resistant casing
GB2471929A (en) * 2009-07-17 2011-01-19 Jcc Lighting Products Ltd An intumescent electrical fitting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2415245A (en) * 2004-06-18 2005-12-21 Scolmore Int Ltd Heat Resistant Casing
GB2422191A (en) * 2005-01-27 2006-07-19 Rd Europe Ltd Fire Resistant Light Fitting
GB2463796A (en) * 2008-09-29 2010-03-31 Robert Cole Light fitting
GB2466875A (en) * 2009-01-12 2010-07-14 Scolmore Int Ltd Heat resistant casing
GB2471929A (en) * 2009-07-17 2011-01-19 Jcc Lighting Products Ltd An intumescent electrical fitting

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9853267B2 (en) 2014-02-03 2017-12-26 Ursatech Ltd. Intumescent battery housing
US10593921B2 (en) 2014-02-03 2020-03-17 Ursatech Ltd. Intumescent battery housing
US10704751B2 (en) 2014-11-26 2020-07-07 Ursatech Ltd. Downlight firestop
US10551016B2 (en) 2014-11-26 2020-02-04 Ursatech Ltd. Downlight firestop
US9803845B2 (en) 2014-11-26 2017-10-31 Ursatech Ltd. Downlight firestop
US11408570B2 (en) 2014-11-26 2022-08-09 Ursatech Ltd. Downlight firestop
US9797563B2 (en) 2014-11-26 2017-10-24 Ursatech Ltd. Downlight firestop
WO2016082026A1 (en) * 2014-11-26 2016-06-02 Jammbco Holdings Ltd Downlight firestop
WO2017140023A1 (en) * 2016-02-18 2017-08-24 常州斯莱海业照明电器有限公司 Recessed light fireproof structure and recessed light
GB2563040A (en) * 2017-05-31 2018-12-05 Luceco Plc Downlight assembly
GB2563040B (en) * 2017-05-31 2020-10-07 Luceco Plc Downlight assembly
CN107270142A (en) * 2017-07-08 2017-10-20 苏州瑞腾照明科技股份有限公司 A kind of fire prevention lighting device for LED lamp
GB2566806B (en) * 2017-08-03 2020-01-29 Aurora Ltd An adaptor for a light fitting
GB2566806A (en) * 2017-08-03 2019-03-27 Aurora Ltd An adaptor for a light fitting
GB2565125A (en) * 2017-08-03 2019-02-06 Aurora Ltd An adaptor for a light fitting
US11794043B2 (en) 2019-12-10 2023-10-24 Ursatech Ltd. Ceiling fixture firestop

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Publication number Publication date
GB2515649B (en) 2015-10-14
GB201410152D0 (en) 2014-07-23

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