WO1996032564A1 - Systeme d'echelle d'evacuation d'urgence - Google Patents

Systeme d'echelle d'evacuation d'urgence Download PDF

Info

Publication number
WO1996032564A1
WO1996032564A1 PCT/US1996/004842 US9604842W WO9632564A1 WO 1996032564 A1 WO1996032564 A1 WO 1996032564A1 US 9604842 W US9604842 W US 9604842W WO 9632564 A1 WO9632564 A1 WO 9632564A1
Authority
WO
WIPO (PCT)
Prior art keywords
ladder
housing
door
emergency escape
rungs
Prior art date
Application number
PCT/US1996/004842
Other languages
English (en)
Inventor
Lane J. Christensen
Original Assignee
Christensen Lane J
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 Christensen Lane J filed Critical Christensen Lane J
Priority to AU53882/96A priority Critical patent/AU5388296A/en
Publication of WO1996032564A1 publication Critical patent/WO1996032564A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
    • E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
    • E06C9/14—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with non-rigid longitudinal members, e.g. rope or chain ladders, ladders of the lazy-tongs type
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/52—Ladders in general with non-rigid longitudinal members
    • E06C1/56—Rope or chain ladders

Definitions

  • an emergency escape ladder which is easily concealed, inexpensive and easy to use for both adults and children. Additionally, the ladder should provide sufficient support for two or more people to be on the ladder at the same time, and should be made to deploy automatically if necessary.
  • an emergency escape ladder including a plurality of rungs which are connected by a durable chord or wire.
  • a housing is also provided into which the emergency escape ladder may be folded, and then the housing concealed behind a drapery or other window covering so as to conceal the presence of the ladder.
  • a single cable is used to connect all of the rungs so as to increase the weight bearing capacity of the ladder.
  • the single cable is connected to the rungs of the ladder in such a manner so as to avoid the necessity of cutting the cable or forming holes in the rungs.
  • the ladder includes a plurality of stand-away spacers which hold the ladder a small distance away from the wall in order to ensure sufficient space for the hand or foot of a user on each rung of the ladder.
  • the housing is provided with a mechanism for automatically releasing the ladder held within the housing when the temperature adjacent the housing is sufficiently hot to indicate that the house is on fire.
  • the ladder and housing may be mounted so as to provide support for the user as he or she climbs up to and out of the window.
  • FIG. 1A shows a cut-away view of an escape ladder assembly in a folded, collapsed state, including a flexible/collapsible ladder, a housing, a back/support plate and a release mechanism in accordance with the principles of the present invention
  • FIG. IB shows the escape ladder of FIG. 1A mounted above a window and disposed in an extended state and with the housing removed so as to show the back/support plate and a mounting bracket;
  • FIG. 2A shows an escape ladder made in accordance with the principles of the present invention mounted on a lower window-sill;
  • FIG. 2B shows a fragmented, cross-sectional view of a ladder made in accordance with the principles of the present invention.
  • FIG. 3 shows a cross-sectional view of the housing shown in FIG. 1A so as to reveal a release mechanism made in accordance with the principles of the present invention.
  • an emergency escape ladder assembly generally indicated at 10, including a ladder, generally indicated at 14, and a housing, generally indicated at 18.
  • the ladder includes a flexible cord/cable 22 which is typically made of steel, but which may be made of other durable materials able to hold a considerable amount of weight.
  • the cable 22 attaches to a back/support plate 26 of the housing 18.
  • both sides of the ladder 14 are supported by a single cable 22 which is looped around the back/support plate 26 of the housing 18 as will be discussed in additional detail with respect to the figures which follow.
  • the cable 22 is also attached to a plurality of ladder rungs 30 which are positioned in FIG. 1A in a stacked arrangement.
  • the ladder rungs 30 are generally cylindrical and typically made of inexpensive steel tubing. The steel tubing is easy to work with and will hold a considerable amount of weight before bending. As will be appreciated, tubing of a half inch in diameter is more than sufficient for the rungs.
  • the rungs 30 could be made of other materials, i.e. other metals or of extruded thermo- resins, and could be virtually any shape.
  • the cylindrical shape shown is chosen because of the widespread availability of such tubing, its low cost, and the ease with which such materials stack.
  • each rung 30 is about twelve inches long, so as to ensure sufficient room to step on the rung while keeping the overall profile of the emergency escape ladder assembly 10 to a minimum.
  • the cable 22 is connected to each rung 30 by a small plug which is positioned in the end of the rung so as to hold the cable. The position of the plug and how it holds the cable 22 in place is discussed in detail with respect to FIG. 2B.
  • the cable 22 which extends between successive rungs 30 forms loops, generally indicated at 34, which extend outwardly from the rungs.
  • the housing 18 is generally about twenty- four inches long so as to provide about six inches of clearance on either side of the rungs 30 in which the cable loops 34 may rest .
  • the housing 40 can be as small as seven inches by one and a half inches by 24 inches, clearly small enough to be concealed by a valence or drapery. If the rungs 30 are spaced between ten and twelve inches, the ladder 14 held within such a housing will be between fifteen and twenty feet long. Such a length will be more than adequate for lowering an individual from the uppermost window of most houses to the ground. By increasing the height of the housing to ten and one half inches, a ladder more than thirty feet can be stored conveniently out of sight. As has been mentioned previously, the housing includes a back/support plate 26 and a housing 40 attached to the back/support plate.
  • the housing 40 does not carry any of the load when the ladder 14 is deployed. Rather, the sole purposes of the housing 40 are to hold the ladder 14 in a folded, compact position and to conceal the ladder.
  • Both the back/support plate 26 and the housing 40 are typically made of steel. However, the back/support plate must be of a sufficient thickness and rigidity to hold the ladder 14 when people are using the same.
  • the housing 40 may be made of numerous different materials. If steel is used, it should be primed so as to accept paint or wall paper so that the housing 40 can be made to blend with the wall to which the emergency escape ladder assembly 10 is attached.
  • a release mechanism for deploying the ladder 14 in the event of an emergency.
  • the release mechanism is formed by a housing door 54 which has an upward extending flange 58 at each end.
  • a hole 62 is formed in each of the flanges 58 (only one being shown in FIG. 1A) and a similarly positioned hole (shown in FIG. 3) is formed in the housing 40.
  • a small dowel 66 is positioned through the holes in the housing 40 and the holes 62 in each flange 58 of the housing door 54.
  • a string 70 is attached to one or both of the dowels 66.
  • the dowel 66 can be made to automatically release the housing door 54 in the event of a fire.
  • the emergency escape ladder assembly 10 is disposed in the bedroom of a young child who might panic once the fire is noticed, rather than releasing the ladder 14 and climbing to safety.
  • FIG. IB there is shown the emergency escape ladder assembly 10 in a deployed position, and with the housing removed so as to reveal the back/support plate 26.
  • a mounting bracket 74 is attached to the wall 78 above a window 82.
  • the mounting bracket 74 has a generally flat midsection 86 which is attached to the wall 78 by bolts (not shown) or some other retention means.
  • the mounting bracket 74 curves to form a retention channel 90.
  • a pair of retention depressions 94 are formed in the mounting bracket 74 for a purpose which will be discussed in detail with respect to FIG. 2A.
  • a lower end of the mounting bracket also curves to form a retention channel 98.
  • the back/support plate 26 is mounted to the mounting bracket 74 by taking an upper end 102 and sliding it into retention channel 90 sufficiently that a lower end 106 of the back/support plate will slide down into the retention channel 98. In such a position, the upper end 102 is still disposed within the retention channel 90. As will be noted, the upper end 102 is notched so that it may be placed in retention channel 90 without contacting the retention depressions 94. However, the lower end 106 of the back/support plate 26 does not have similar notches, and if inverted, would contact the retention depressions 94.
  • a first/supported end of the cable 22 wraps behind the back/support plate 26 so that a midpoint 108 is secured thereto by one or more fasteners 110.
  • the force on the back/support plate 26, and thus the mounting bracket 74 is generally straight down. This force holds the lower end 106 of the back/support plate 26 firmly in the lower retention channel 98 when a person climbs on the ladder 14.
  • the ladder 14 When so deployed, the ladder 14 may be used in a variety of ways. First, if the window 82 is close to the floor (not shown) , a user of the ladder 14 need only open the window, grab hold of the ladder by the cable 22 or a rung 30 near a second/unsupported end of the ladder and push the ladder out so that the unattached end may fall to the ground. As will be appreciated, even a small child can feed the ladder 14 out of the window 82. This is in contrast to prior emergency escape ladders which had hooks which mount on the window-sill 114 or other methods of attachment. In such embodiments, the user had to lift most if not all of the ladder to properly secure the hooks. Obviously, such a ladder would be difficult for use by small children. However, in the present invention, the weight of the ladder 14 is supported by the back/support plate 26 and ultimately by the wall 78.
  • the user may use an upper rung, such as 30a or 30b as a support as he or she climbs onto the window-sill.
  • the first rung 30a of the ladder 14 will be positioned about two or three feet below the back/support plate 26, with each successive rung 30b etc. being another ten to twelve inches down.
  • the user was required to swing one leg out the window before the ladder provided any support .
  • the user is able to maintain a grip on the ladder before exiting the window.
  • the ladder 14 provides additional advantages for rooms in which the window is relatively high above the floor.
  • the user can climb the rungs 30 of the ladder 14 to reach the window-sill 114.
  • the ladder 14 is then pushed out of the window so that it extends down an exterior of the house.
  • the ladder 14 can also be used for basement bedrooms .
  • basement windows are positioned significantly higher than those of upper floors to prevent water from entering the basement. However, this can present a danger to young children who cannot reach the windows.
  • By positioning the ladder 14 shown in FIG. IB above the window the child would be able to climb up to the window and escape in the event of an emergency.
  • the stand-aways 118 consist of an elongated, L- shaped piece of metal or other rigid material .
  • the stand-aways 118 When the ladder 14 is deployed, the stand-aways 118 are forced into a position in which the extend generally perpendicular to the long axis of the rung 30 in a horizontal direction.
  • the stand-aways 118 contact the wall 78 and hold the ladder a set distance away; typically two to three inches.
  • one negative attribute of most flexible ladders is that they tend to rest against the wall. As the user climbs down the ladder, care must be taken that the ladder provides sufficient toe and hand room adjacent each rung. In their hurry to escape the burning house, many people are not careful and might fall from the ladder.
  • the stand-aways 118 are positioned every second or third rung 30 to ensure that the rungs do not rest against the wall .
  • the stand-aways are compacted in the housing 40 so that nothing is attached to the exterior of the house which would leave unsightly marks.
  • the stand-aways 118 also help to minimize swaying, another problem common to flexible ladders.
  • the ladder 14 After the emergency which prompted the escape has passed, the ladder 14 must be compacted and returned to the housing 40. While this can be done by loading the ladder 14 into the housing 40 up through the door 54, a much easier approach is accomplished by pushing the upper end 102 of the back/support plate 26 deep into the retention channel 90 so as to lift the lower end 106 of the back/support plate out of the lower retention channel 98. Once the back/support plate 26 is free of the mounting bracket 74, the plate and the housing 40 (FIG. 1A) can be turned over and the ladder 14 reloaded from the top. This is done by pushing adjacent rungs 30 together so as to form two columns of rungs as shown in FIG. 1A.
  • the cable 22 connecting the rungs 30 are folded into loops which extend outwardly from the rungs.
  • the folded ladder is much more compact and easier to conceal than ladders which are rolled about a wheel, or otherwise stored, while maintaining or exceeding the strength of prior ladders .
  • the housing door 54 is replaced and the housing 40 is returned to an upright position.
  • the back/support plate 26 is then replaced in the mounting bracket 74 and the ladder 14 is ready to use.
  • FIG. 2A there is shown an alternate method of using the ladder 14 shown in FIG. IB.
  • the ladder 14 may be positioned below a window-sill 114 where it may be concealed.
  • the ladder assembly 10 shown in FIG. 2A has most of the other advantages of the invention as discussed above.
  • the mounting bracket 74 is attached to the window-sill 114 by two or more bolts 122.
  • the back/support plate 26 is positioned to be held by the mounting bracket 74.
  • the housing door 54 should be disposed on the top of the housing 40, the back/support plate 26 is positioned in the mounting bracket 74 upside-down relative to the embodiment discussed above.
  • the back/support plate 26 cannot be mounted in the manner described above. This is due to retention depressions 94 formed in the mounting bracket 74. To overcome this, the back/support plate 26 is mounted by sliding it laterally into the channels 90 and 98.
  • the retention depressions 94 apply force to the unnotched end 106 of the back/support plate 26 to keep the opposing end 102 from being pulled out of the retention channel 98. If the end 102 of the back/support plate 26 were pulled from the retention channel 98, the plate would pull free of the mounting bracket 74, and nothing would hold the ladder 14. While the ladder 14 shown in FIG. 2A extends over the window-sill 114 in a similar manner as prior art escape ladders, it is much easier to use. While a child typically cannot lift the prior art ladders and mount their holding devices to the window-sill 114, it is very easy to remove the housing door (not shown) and push the ladder 14 out the window. Even a very young child can push the ladder 14 out one rung 30 at a time. Once several rungs 30 have been pushed out, their weight will assist in pulling the rest of the ladder 14 out and into position along an exterior wall of the house .
  • one or more stand-aways 118 will deploy to hold the ladder away from the exterior wall. Because the stand-away 118 extends two or three inches in each direction, it does not matter in which position the ladder 14 is housed. Whether the ladder 14 drops from above the window or is pushed over the window-sill 114, the stand-aways 118 make the ladder 14 safer by ensuring adequate room to stand on or grip the ladder as the user climbs down. Unlike prior ladders, the stand-aways 118 are not mounted to the exterior and will cause minimal, if any, marking to the exterior wall. Also shown in FIG. 2A is a plug 126 which is positioned in the rung 30 for holding the cable 22 in contact with the rung.
  • the plug 126 will be made of wood or another slightly compressible material and will have two grooves 130 formed therein for receiving the cable 22. Once inside the rung 30 and beyond the plug 126, the cable 22 loops back through the other groove 130 formed in the plug 126 and on to the next rung 30.
  • the rungs 30 are made from twelve inch long segments of half inch steel pipe.
  • the plugs 126 are formed of wood pieces which are 5/8 of an inch in diameter and about 1 inch long.
  • the ends of the rungs are cinched, i.e. pressed so as to lodge the plugs in place. While heavy cinching is preferred, even a light cinch has been found to work well. Obviously, the extent of cinching necessary will depend on the material used for the plugs.
  • the plugs 126 cause the cable 22 to assume a position extending outwardly from the rungs 30, as is shown by the loops 34 in FIG. 1A.
  • the cable 22 extends out of the way. While this results in a longer housing, it also enables the housing to be thinner and a smaller height by enabling compact packing of the rungs 30.
  • the cable 22 between each pair of rungs 30 is drawn generally taut as shown in FIG. 2B.
  • a ladder made in accordance with the principles of the present invention was tested for weight bearing capacity. A thousand pound weight was placed on the ladder 14 before a plug placed in a lightly cinched end of a rung pulled free. None of the heavily cinched ends showed any sign of give. Of course, even after the plug pulled free, the other rungs of the ladder were still usable due to the single cable design. Thus, several people, or even an entire family may escape a house on a single ladder made in accordance with the principles of the present invention.
  • FIG. 2B Also shown in FIG. 2B is a cross-sectional view of the stand-aways 118.
  • the stand-aways 118 have a pair of holes 140 through which the cable 22 is strung so that a portion of the cable which extends above the rung 30 is disposed through an upper hole 140a and a portion of the cable extending through the lower hole 140b extends to a lower rung.
  • the stand-aways 118 may be disposed anywhere along the loop 34 between adjacent rungs.
  • the tension in the cable 22 causes the stand-aways 118 to be slid to a position adjacent the rung 30.
  • the tension on the cable 22 also holds the stand-aways 118 in a generally horizontal position perpendicular to the rung 30, thereby spacing the rung from a wall.
  • FIG. 3 there is shown a cross- sectional view of the housing 40 and the housing door 54.
  • the housing door has a hole 62 in each of the flanges 58.
  • the housing 40 is also provided with a pair of holes 150.
  • a pair of dowels 66a and 66b are disposed to extend through the holes 62 and 150 so as to retain the housing door 54 in position.
  • the first dowel 66a is typically made of metal, such as steel or aluminum, and it connected to a string 70. Pulling the string 70 pulls the dowel 66a out of the holes 62 and 150, and releases the housing door 54, thereby causing the ladder, not shown, to deploy into the position shown in FIG. IB.
  • the other dowel 66b is made of any material which melts at between about 160° Fahrenheit and 200° Fahrenheit. Typically, this will be a meltable adhesive, such as the adhesive sold by Black and Decker Corporation under the trademark "THERMOGRIP" . However, any material which melts or becomes sufficiently soft in such a temperature range is acceptable.
  • the meltable dowel 66b acts as an automatic emergency release mechanism. When the air adjacent to the housing 40 reaches about 160° Fahrenheit and 200° Fahrenheit. Typically, this will be a meltable adhesive, such as the adhesive sold by Black and Decker Corporation under the trademark "THERMOGRIP" . However, any material which melts or becomes sufficiently soft in such a temperature range is acceptable.
  • the meltable dowel 66b acts as an automatic emergency release mechanism. When the air adjacent to the housing 40 reaches about 160
  • the dowel 66b softens or melts and allows the housing door 54 to drop, thereby causing the ladder to deploy.
  • the housing 40 In addition to holding and concealing the ladder 14 (FIGs. 1A through 2B) , the housing 40 also serves as an insulating device.
  • the housing 40 heated up sufficiently to be hot to the touch.
  • the ladder which was deployed once the meltable dowel released the housing door 54 was still cool to the touch.
  • the threshold is set at 160 degrees, as opposed to 120 degrees for example, is that those who live in hotter climates would have ladders deploy every time the occupant of the house left for vacation and did not properly ventilate their house.
  • a higher threshold enables the ladder to automatically deploy in time to save a user's life, while not causing accidental deployments of the ladder.
  • the ladder were to be used in colder climates where 100° Fahrenheit temperatures were abnormal, a material could be used which melts or becomes sufficiently soft to release the housing door 54 at 140 degrees or even 120 degrees.
  • the ease at which the housing door 54 falls away when either of the dowels 66a or 66b is removed (or melted) is due to the spacings 160 which are provided between the flanges 58 and the housing 40, as well as the fact that the holes 62 in the flanges 58 are larger than the holes 150 in the housing.
  • the housing door 54 slides in the direction of the removed dowel, and falls off the remaining dowel, thereby releasing the ladder.
  • dowel 66a is steel and connected to string 70, and that dowel 66b is meltable, both dowels could be made of a meltable material and attached to a string, thereby ensuring that the housing door 54 releases as soon as possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

Cette invention concerne un système d'échelle d'évacuation d'urgence (10), lequel système comprend une échelle pliante (14), un logement (18) servant à stocker et à abriter l'échelle (14) et permettant également de la déplier, ainsi qu'un support de fixation d'une extrémité de l'échelle (14) lorsque celle-ci est utilisée en cas d'urgence. D'après un aspect de l'invention, le logement (18) comprend une trappe (54) retenant l'échelle (14) à l'intérieur dudit logement (18), laquelle trappe (54) peut être retirée pour laisser apparaître l'échelle (14) en cas d'urgence. La trappe (54) peut être enlevée en actionnant et en retirant un mécanisme de retenue (50) tel qu'un goujon (66), ou en équipant le système d'un mécanisme de retenue (50) s'ouvrant en cas d'incendie. Plusieurs éléments d'écartement peuvent également servir à maintenir l'échelle (14) à une distance minimale d'un mur de manière à faciliter l'utilisation de cette dernière (14).
PCT/US1996/004842 1995-04-10 1996-04-08 Systeme d'echelle d'evacuation d'urgence WO1996032564A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53882/96A AU5388296A (en) 1995-04-10 1996-04-08 Emergency escape ladder assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41910695A 1995-04-10 1995-04-10
US08/419,106 1995-04-10

Publications (1)

Publication Number Publication Date
WO1996032564A1 true WO1996032564A1 (fr) 1996-10-17

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ID=23660810

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/004842 WO1996032564A1 (fr) 1995-04-10 1996-04-08 Systeme d'echelle d'evacuation d'urgence

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AU (1) AU5388296A (fr)
WO (1) WO1996032564A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367585A (en) * 2000-09-01 2002-04-10 John Anthony Frew Rope ladder having twin rings held in place by figure of eight
WO2005014966A1 (fr) * 2003-08-08 2005-02-17 Ze-Peng Zhou Echelle souple avec accessoire de support
EP1568564A1 (fr) * 2004-02-25 2005-08-31 Bombardier Transportation GmbH Voiture de chemin de fer munie d'un équipement pour sortie de secours
CN101649719B (zh) * 2009-07-03 2011-08-24 段鳗珊 绳环梯
GB2478944A (en) * 2010-03-24 2011-09-28 Stephen Carl Watson Concealed escape ladder
CN104727741A (zh) * 2013-12-24 2015-06-24 刘四林 一种消防用的逃生软梯消防柜
CN106838584A (zh) * 2017-03-21 2017-06-13 无锡市卡德姆机械科技有限公司 安装翻板式电视底板的户内逃生梯
CN107352033A (zh) * 2017-07-18 2017-11-17 周玉红 一种可安全投放飞机软梯的装置
CN109138827A (zh) * 2018-11-10 2019-01-04 范建伟 一种建筑物外墙窗户逃生梯及包含逃生梯的组合防盗窗

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US819956A (en) * 1905-11-06 1906-05-08 Hugo A Thomsen Fire-escape.
US3033310A (en) * 1961-02-27 1962-05-08 Kenyon C Mcleod Foldable escape ladders with adjustable rungs
US3329238A (en) * 1965-07-15 1967-07-04 Howard K Guldi Ladder
GB1249153A (en) * 1968-03-15 1971-10-06 Stephen Francis Flanagan Improvements in or relating to fire escape means or apparatus
US3809181A (en) * 1972-12-26 1974-05-07 J Garrison Retractable ladders

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US819956A (en) * 1905-11-06 1906-05-08 Hugo A Thomsen Fire-escape.
US3033310A (en) * 1961-02-27 1962-05-08 Kenyon C Mcleod Foldable escape ladders with adjustable rungs
US3329238A (en) * 1965-07-15 1967-07-04 Howard K Guldi Ladder
GB1249153A (en) * 1968-03-15 1971-10-06 Stephen Francis Flanagan Improvements in or relating to fire escape means or apparatus
US3809181A (en) * 1972-12-26 1974-05-07 J Garrison Retractable ladders

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367585A (en) * 2000-09-01 2002-04-10 John Anthony Frew Rope ladder having twin rings held in place by figure of eight
GB2367585B (en) * 2000-09-01 2004-01-07 John Anthony Frew Twin rung rope ladder
WO2005014966A1 (fr) * 2003-08-08 2005-02-17 Ze-Peng Zhou Echelle souple avec accessoire de support
EP1568564A1 (fr) * 2004-02-25 2005-08-31 Bombardier Transportation GmbH Voiture de chemin de fer munie d'un équipement pour sortie de secours
CN101649719B (zh) * 2009-07-03 2011-08-24 段鳗珊 绳环梯
GB2478944A (en) * 2010-03-24 2011-09-28 Stephen Carl Watson Concealed escape ladder
CN104727741A (zh) * 2013-12-24 2015-06-24 刘四林 一种消防用的逃生软梯消防柜
CN106838584A (zh) * 2017-03-21 2017-06-13 无锡市卡德姆机械科技有限公司 安装翻板式电视底板的户内逃生梯
CN107352033A (zh) * 2017-07-18 2017-11-17 周玉红 一种可安全投放飞机软梯的装置
CN107352033B (zh) * 2017-07-18 2020-05-22 卢素蓓 一种可安全投放飞机软梯的装置
CN109138827A (zh) * 2018-11-10 2019-01-04 范建伟 一种建筑物外墙窗户逃生梯及包含逃生梯的组合防盗窗

Also Published As

Publication number Publication date
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