EP0879206A1 - Wheel chair lift - Google Patents

Wheel chair lift

Info

Publication number
EP0879206A1
EP0879206A1 EP96907825A EP96907825A EP0879206A1 EP 0879206 A1 EP0879206 A1 EP 0879206A1 EP 96907825 A EP96907825 A EP 96907825A EP 96907825 A EP96907825 A EP 96907825A EP 0879206 A1 EP0879206 A1 EP 0879206A1
Authority
EP
European Patent Office
Prior art keywords
platform
wagon
wheelchair
bearings
loading platform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96907825A
Other languages
German (de)
French (fr)
Inventor
Mats Eriksson
Bengt Uddstrand
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.)
Newlift I Nynashamn AB
Original Assignee
Newlift I Nynashamn AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Newlift I Nynashamn AB filed Critical Newlift I Nynashamn AB
Publication of EP0879206A1 publication Critical patent/EP0879206A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/06Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces
    • B66B9/08Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces associated with stairways, e.g. for transporting disabled persons
    • B66B9/0861Hanging lifts, e.g. rope suspended seat or platform

Definitions

  • the object of the present invention is the production of an elevator for wheelchairs which is designed so as to be installable as well in linear staircases as in winding staircases and which is equipped with a loading platform the design of which enables transportation of various types of wheelchairs
  • An other purpose of the invention is the production of an elevator for wheelchairs, the loading platform of which is suspended in such a way as to enable it to be elevated to the ceiling after it's usage, where the platform hangs in such a way as not to constitute a hindrance to other transportations in the staircase.
  • Elevator devices for wheelchairs intended for installation in staircases are previously known. They consist as a rule of a transport rail fixed to the wall of the stairwell and of a driving machinery placed inside the rail which carries a platform intended to be driven up and down the stairway along the said rail.
  • the disadvantage of that design is among other things that it must be tailor-made specifically to accommodate to each and every staircase and furthermore it constitutes a permanent hindrance to other transports in the staircase.
  • a wheelchair elevator which consists of an along a transport rail extending and by a driving machinery driven carrying device in which four carrying chains are suspended.
  • Each one of said chains is at its lower end fashioned with a loop on which the wheelchair is meant to be fastened by hooking.
  • the wheelchair In order to achieve a safe fastening by hooking on the chains the wheelchair must however be specially equipped wherefore the German wheelchair elevator can't be used for transport of wheelchairs lacking this supplementary equipment.
  • the fixing of this equipment onto the chair entails problems in concurring with the strict security regulations.
  • the Swedish patent 450 890 is aimed at an elevator for the conveying of goods and if it is shall be used for transportation of a wheelchair the latter must be specially equipped for accommodation to the to the carrying device of the elevator.
  • the American patent 2,164, 128 is aimed at an elevator device by means of which a working platform can be elevated and moved to different heights in order to facilitate the execution of various types of work for example photographing an object from different angles.
  • the American elevator device is however not suited to be used for the transport of a wheelchair in for instance a staircase.
  • the problem which is at the origin of the present invention and which it aims to solve consists in partly achieving an elevator that can be used in staircases for transport of wheelchairs of arbitrary designs without accommodation of these to the elevating device of the elevator, and partly in complying with security regulations in force on transportation of those bound to wheelchairs by means of a wheelchair elevator of said type and also to by a simple manipulation to enable after it's usage the lifting device of the elevator to be elevated up and away from the stairs so as to avoid it's being a hindrance to other transports utilizing the staircase
  • the present invention purports to a wheelchair elevator consisting of a transport rail fixed to the ceiling of the staircase or onto brackets on the wall of the staircase, a driving and lifting machinery fixed onto a with wheels equipped wagon intended to run along the transport rail and a raisable and lowerable load platform suspended in straps or wire on the wagon
  • the loading platform is designed so that the wheelchair bound individual sitting in his wheelchair of arbitrary design can roll onto the platform and there operate autonomously the elevator for transport to the desired staircase landing.
  • the loading platform is equipped with security devices to prevent the wheelchair during transport from rolling forwards or backwards. These security devices start to function as soon as the lifting wires or straps are tightened in conjunction with the lifting of the loading platform.
  • Fig 1 shows schematically a wheelchair elevator in accordance with the invention installed in a staircase consisting of an along a rail drivable wagon in which a loading platform is suspended
  • Fig 2 shows a section through the wagon with it's driving machinery perpendicular to the direction of motion of the wagon
  • Fig 3 A and B show the suspension device for the loading platform of the elevator at positions of different heights
  • Fig 4 shows the wagon as seen from above
  • Fig 5 shows a locking device for the lift engine to prevent for instance in case of an engine failure that the loadmg platform should fall down
  • the wheelchair elevator is installed in a staircase. It consists of a with driving and lifting machinery equipped wagon 1 , to which a loading platform 2 is suspended in four carrying wires or straps 3.
  • the wagon runs along an onto the staircase ceiling or staircase wall brackets fixed rail 4.
  • the wheelchair bound person can autonomously by means of a "here-power-switch" maneuver the wheelchair elevator to the desired staircase landing. Sitting in the personal wheelchair the person thereafter rolls out onto the platform 2 and presses on an on the platform extant power switch for descent The platform is then automatically lifted up a distance from the stairs so that the platform shall have a free path in relation to the stairs before the descent is initiated.
  • the loading platform 2 is designed as an open box with two fixed side gables and with the two gables 5 in the direction of motion foldable by means of hinges 6.
  • the carrying straps 3 are fastened onto the corners of the platform in such a way that when the former are loose the loading platform 2 rests on a staircase landing and the gables 5 are folded down so that the wheelchair easily can be rolled out onto the platform.
  • the gables 5 are angled up where by the wheelchair is prevented during the transport from rolling off the platform.
  • the straps 3 are at their upper ends fastened in pairs to one side each of the wagon 1 unto a yoke consisting of a middle part 7 and two on the middle part mounted in bearings flexible arms 8.
  • the straps 3 are fastened into a drum 9 fixed onto a driving shaft of an onto the wagon 1 fixed lift engine 10.
  • the middle part 7 of the yoke consists of two plates which are pivotably mounted in bearings about said driving shaft on each side of the drum 9.
  • Each one of the straps 3 being on each side of the drum 9 is drawn from the drum across two in and between the middle part 7 two plates break reels 1 1 mounted in bearings and across an in the arm 8 far end break reel 12 mounted in bearings.
  • each strap 3 is fastened to a corner 13 of the loading platform 2.
  • the wheelchair bound person After the wheelchair elevator having been used and the wheelchair bound person having reached the desired staircase landing and rolled off the platform the wheelchair bound person now presses on an on the wall extant power switch, whereby the lift engine 10 is activated and the loading platform is elevated up to the ceiling above the staircase.
  • each one of the straps 3 is at it's lower end equipped with a stop 14.
  • the wagon 1 is intended to run along the rail 4 which in the shown embodiment consists of a U-profile with edges bent inwards 1 5.
  • the wagon 1 is held up by two in bogie mounted in bearings support wheels 16 and stabilised sideways by an onto the support wheels driving engine 17 fixed and with a claw shaped outer end equipped steering arm 18.
  • the claw shaped end holds on to the upper of the rail's 4 inwards bent edges 15 and is intended to slide along the same.
  • the bogie is pivotably mounted in bearings onto the driving engine's 17 driving shaft and the driving engine is fixed onto the wagon's chassis consisting of a cross bar 19 inside of which the common axis for both of the strap drums 9 is mounted in bearings.
  • the wagon is driven along the rail 4 by the driving engine 17 in cooperation with a chain or a cogged rod.
  • the driving engine 1 7 is equipped with a locking device in order to in the event of an engine failure prevent that the loading platform with the wheelchair bound person should fall down.
  • a locking device On the bottom side of the rail and along it's entire stretch is fixed an on both sides cogged rod 20.
  • Underneath and in cooperation with this cogged rod is a shuttle like looking mechanism consisting of a rod 21 slidably mounted in bearings in on the bar 19 devised sliding 22.
  • the rod 21 is equipped with two block heads 23 which are installed so as to cooperate with the cogged rod 20 on each side of the latter.
  • the rod 21 is brought to on each rotation to shift backwards and forwards across the direction of movement of the wagon by means of an on the rod 21 fixed arm 24 which slides into a curved track in an on the driving engine shaft steadily fixed drum 25.
  • the arm 24 follows the track in the drum 25 and gives the rod 21 and thereby the block heads a forwards and backwards returning movement.
  • the curvature of the track is in this respect so chosen and the cogs on the cogged rod 20 so distributed that a block head 23 always is positioned right between two cogs for each semi rotation of the driving engine shaft. This has as a consequence that if an engine failure should occur or if the wagon's 1 driving mechanism should release it's grip on the chain or cogged rod the wagon would fall along the rail at the most a distance corresponding to half a turn of the driving engine shaft.
  • the middle parts 7 of the yoke are equipped with an onto the bar 19 fixed friction breaking device 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Handcart (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

The object of the present invention is to achieve a wheel chair lift to be used in stairs, said lift being equipped with a vertically adjustable loading platform (2). The platform is hanging in four ropes or bands (3) from a waggon (1) drivable along a rail (4). The loading platform (2) is designed as a case provided with two fixed sides and two in the direction of travel turnable sides (5) in order to make it possible for the person tied to his wheel chair to roll on and off the platform himself when the platform has stopped on a landing. The turnable sides (5) are turned up as soon as the bands (3) are stretched up when the loading platform (2) is lifted thereby forming an obstacle to the wheel chair to roll off the platform during the transportation. After the lift has been used the person tied to his wheel chair hoists the platform (2) against the waggon (1) and hides the waggon which is possible by way of the bands (3) in which the platform is hanging are extending in pairs over breaking rolls (11, 12) journalled in a yoke mounted under the waggon (1) and provided with articulated arms (8).

Description

Wheel chair lift
The object of the present invention is the production of an elevator for wheelchairs which is designed so as to be installable as well in linear staircases as in winding staircases and which is equipped with a loading platform the design of which enables transportation of various types of wheelchairs
An other purpose of the invention is the production of an elevator for wheelchairs, the loading platform of which is suspended in such a way as to enable it to be elevated to the ceiling after it's usage, where the platform hangs in such a way as not to constitute a hindrance to other transportations in the staircase.
Elevator devices for wheelchairs intended for installation in staircases are previously known. They consist as a rule of a transport rail fixed to the wall of the stairwell and of a driving machinery placed inside the rail which carries a platform intended to be driven up and down the stairway along the said rail. The disadvantage of that design is among other things that it must be tailor-made specifically to accommodate to each and every staircase and furthermore it constitutes a permanent hindrance to other transports in the staircase.
In the German patent DE 34 25 998 a wheelchair elevator is described which consists of an along a transport rail extending and by a driving machinery driven carrying device in which four carrying chains are suspended. Each one of said chains is at its lower end fashioned with a loop on which the wheelchair is meant to be fastened by hooking. In order to achieve a safe fastening by hooking on the chains the wheelchair must however be specially equipped wherefore the German wheelchair elevator can't be used for transport of wheelchairs lacking this supplementary equipment. The fixing of this equipment onto the chair entails problems in concurring with the strict security regulations.
The Swedish patent 450 890 is aimed at an elevator for the conveying of goods and if it is shall be used for transportation of a wheelchair the latter must be specially equipped for accommodation to the to the carrying device of the elevator.
The American patent 2,164, 128 is aimed at an elevator device by means of which a working platform can be elevated and moved to different heights in order to facilitate the execution of various types of work for example photographing an object from different angles. The American elevator device is however not suited to be used for the transport of a wheelchair in for instance a staircase.
The problem which is at the origin of the present invention and which it aims to solve consists in partly achieving an elevator that can be used in staircases for transport of wheelchairs of arbitrary designs without accommodation of these to the elevating device of the elevator, and partly in complying with security regulations in force on transportation of those bound to wheelchairs by means of a wheelchair elevator of said type and also to by a simple manipulation to enable after it's usage the lifting device of the elevator to be elevated up and away from the stairs so as to avoid it's being a hindrance to other transports utilizing the staircase
For the solution of the above mentioned problems the present invention purports to a wheelchair elevator consisting of a transport rail fixed to the ceiling of the staircase or onto brackets on the wall of the staircase, a driving and lifting machinery fixed onto a with wheels equipped wagon intended to run along the transport rail and a raisable and lowerable load platform suspended in straps or wire on the wagon
The loading platform is designed so that the wheelchair bound individual sitting in his wheelchair of arbitrary design can roll onto the platform and there operate autonomously the elevator for transport to the desired staircase landing. The loading platform is equipped with security devices to prevent the wheelchair during transport from rolling forwards or backwards. These security devices start to function as soon as the lifting wires or straps are tightened in conjunction with the lifting of the loading platform.
After the usage of the loading platform it shall according to the invention with a single manipulation be able to be elevated up from the stairs. This is achieved through the fact that the wires or straps to which the platform is suspended are running on break reels mounted in bearings in a with flexible arms designed yoke which is fixed underneath the wagon. The invention will in the following be more thoroughly described in connection with the adjoined drawings, which show an embodiment of the invention. Fig 1 shows schematically a wheelchair elevator in accordance with the invention installed in a staircase consisting of an along a rail drivable wagon in which a loading platform is suspended, Fig 2 shows a section through the wagon with it's driving machinery perpendicular to the direction of motion of the wagon, Fig 3 A and B show the suspension device for the loading platform of the elevator at positions of different heights, Fig 4 shows the wagon as seen from above and Fig 5 shows a locking device for the lift engine to prevent for instance in case of an engine failure that the loadmg platform should fall down
As is apparent from the in Fig 1 shown example of an embodiment the wheelchair elevator is installed in a staircase. It consists of a with driving and lifting machinery equipped wagon 1 , to which a loading platform 2 is suspended in four carrying wires or straps 3. The wagon runs along an onto the staircase ceiling or staircase wall brackets fixed rail 4. The wheelchair bound person can autonomously by means of a "here-power-switch" maneuver the wheelchair elevator to the desired staircase landing. Sitting in the personal wheelchair the person thereafter rolls out onto the platform 2 and presses on an on the platform extant power switch for descent The platform is then automatically lifted up a distance from the stairs so that the platform shall have a free path in relation to the stairs before the descent is initiated.
The loading platform 2 is designed as an open box with two fixed side gables and with the two gables 5 in the direction of motion foldable by means of hinges 6. The carrying straps 3 are fastened onto the corners of the platform in such a way that when the former are loose the loading platform 2 rests on a staircase landing and the gables 5 are folded down so that the wheelchair easily can be rolled out onto the platform. When the straps are stretched which goes to say when the platform is in the process of being lifted the gables 5 are angled up where by the wheelchair is prevented during the transport from rolling off the platform.
The straps 3 are at their upper ends fastened in pairs to one side each of the wagon 1 unto a yoke consisting of a middle part 7 and two on the middle part mounted in bearings flexible arms 8. The straps 3 are fastened into a drum 9 fixed onto a driving shaft of an onto the wagon 1 fixed lift engine 10. The middle part 7 of the yoke consists of two plates which are pivotably mounted in bearings about said driving shaft on each side of the drum 9. Each one of the straps 3 being on each side of the drum 9 is drawn from the drum across two in and between the middle part 7 two plates break reels 1 1 mounted in bearings and across an in the arm 8 far end break reel 12 mounted in bearings. At its lower end each strap 3 is fastened to a corner 13 of the loading platform 2. After the wheelchair elevator having been used and the wheelchair bound person having reached the desired staircase landing and rolled off the platform the wheelchair bound person now presses on an on the wall extant power switch, whereby the lift engine 10 is activated and the loading platform is elevated up to the ceiling above the staircase.
Through the straps 3 running on in flexible arms mounted in bearings break reels the loading platform 2 can be elevated up towards the wagon by means of only the drum 9. And to after that angle up the arms 8 so that the loading platform can be lifted all the way up under the wagon and thus completely hide the latter each one of the straps 3 is at it's lower end equipped with a stop 14.
The wagon 1 is intended to run along the rail 4 which in the shown embodiment consists of a U-profile with edges bent inwards 1 5. The wagon 1 is held up by two in bogie mounted in bearings support wheels 16 and stabilised sideways by an onto the support wheels driving engine 17 fixed and with a claw shaped outer end equipped steering arm 18. The claw shaped end holds on to the upper of the rail's 4 inwards bent edges 15 and is intended to slide along the same. The bogie is pivotably mounted in bearings onto the driving engine's 17 driving shaft and the driving engine is fixed onto the wagon's chassis consisting of a cross bar 19 inside of which the common axis for both of the strap drums 9 is mounted in bearings. The wagon is driven along the rail 4 by the driving engine 17 in cooperation with a chain or a cogged rod.
To comply with the rigorous security regulations in force regarding elevator devices of the kind in question the driving engine 1 7 is equipped with a locking device in order to in the event of an engine failure prevent that the loading platform with the wheelchair bound person should fall down. On the bottom side of the rail and along it's entire stretch is fixed an on both sides cogged rod 20. Underneath and in cooperation with this cogged rod is a shuttle like looking mechanism consisting of a rod 21 slidably mounted in bearings in on the bar 19 devised sliding 22. the rod 21 is equipped with two block heads 23 which are installed so as to cooperate with the cogged rod 20 on each side of the latter. During the rotation of the engine driving shaft the rod 21 is brought to on each rotation to shift backwards and forwards across the direction of movement of the wagon by means of an on the rod 21 fixed arm 24 which slides into a curved track in an on the driving engine shaft steadily fixed drum 25. When the driving engine shaft rotates the arm 24 follows the track in the drum 25 and gives the rod 21 and thereby the block heads a forwards and backwards returning movement. The curvature of the track is in this respect so chosen and the cogs on the cogged rod 20 so distributed that a block head 23 always is positioned right between two cogs for each semi rotation of the driving engine shaft. This has as a consequence that if an engine failure should occur or if the wagon's 1 driving mechanism should release it's grip on the chain or cogged rod the wagon would fall along the rail at the most a distance corresponding to half a turn of the driving engine shaft.
In order to prevent that the loading platform should come into an uncontrolled swinging the middle parts 7 of the yoke are equipped with an onto the bar 19 fixed friction breaking device 26.

Claims

Claims
1. A wheelchair elevator consisting of - an in a staircase installed transport rail,
- a with a lifting and driving machinery equipped wagon intended to be driven along the transport rail,
- an in the wagon raisable and lowerable carrying element on which the wheelchair is intended to be transported, characterized in,
- that the carrying element consists of an as an open box shaped loading platform (2) and
- that the carrying platform's (2) both of the to the elevator's direction of movement turned edges (5) are by means of hinges (6) foldable to allow for the wheelchair bound person to autonomously roll onto and off the platform when the latter is lowered and is on an actual staircase landing
2. A wheelchair elevator according to claim 1 , characterized in,
- that the loading platform (2) is suspended by four straps (3), which at their upper ends are fastened in pairs to one side each of the wagon (1 ) and onto the driving shaft of a lift engine (10) mounted in bearings strap drum (9).
3. A wheelchair elevator according to claim 2, characterized in,
- that each one of the straps (3)beιng on each side of the wagon (1 ) is drawn from the the strap drum (9) over in a yoke set, break reels mounted in bearings (1 1 ,12) and to a corner of the loading platform (2) and
- that the yoke is pivotably mounted in bearings onto the lift engine's (10) driving axis and consists of a middle part (7) as well as of two in that part flexible mounted in bearings arms (8).
4. A wheelchair elevator according to claim 3, characterized in,
- that each one of the straps (3) is at it's lower ends equipped with a stop (14) by means of which the arms (8) during the last part of the loading platform's (2) elevation up towards the wagon (1 ) can be angled upwards so that the platform entirely comes to cover the wagon (1 ).
5. A wheelchair elevator according to claim 1 , characterized in,
- that the wagon (1 ) consists of a bar (1 9) which is carried by the rail (4) by means of two in bogie mounted in bearings support wheels (16) and
- that the support wheels (16) are driven by an on the bar (19) mounted driving engine (17) in cooperation with an in the transport rail (4) set chain or cogged rod.
6 A wheelchair elevator according to claim 5, characterized in,
- an on the transport chain's (4) bottom side and along all of it's extension set dented cogged rod (20), - an on the bar ( 1 9) in plain bearings (22) slidably mounted in bearings shuttle rod
(21 ),
- two on the shuttle rod's (21 ) one end fixedly set and with the dented cogged rod (20) cooperating block heads (23) as well as
- a to the other end of the shuttle rod (21 ) fastened steering arm (24) which by tracking grips into a curve shaped track in an on the driving engine's (17) motor axis mounted drum (25)
EP96907825A 1995-03-21 1996-02-29 Wheel chair lift Withdrawn EP0879206A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9500995 1995-03-21
SE9500995A SE504141C2 (en) 1995-03-21 1995-03-21 wheelchair Lift
PCT/SE1996/000259 WO1996029272A1 (en) 1995-03-21 1996-02-29 Wheel chair lift

Publications (1)

Publication Number Publication Date
EP0879206A1 true EP0879206A1 (en) 1998-11-25

Family

ID=20397612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96907825A Withdrawn EP0879206A1 (en) 1995-03-21 1996-02-29 Wheel chair lift

Country Status (3)

Country Link
EP (1) EP0879206A1 (en)
SE (1) SE504141C2 (en)
WO (1) WO1996029272A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113104704A (en) * 2021-04-08 2021-07-13 河南科技大学 Elevator for additional installation in existing building

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9503009L (en) * 1995-08-31 1997-03-01 Mats Eriksson Procedure and equipment for moving wheelchair bound from own wheelchair to armchair in aircraft
SE517798C2 (en) * 1998-03-27 2002-07-16 Sisab Sven Inge Soederholm Ab wheelchair Lift
GB2480674B (en) * 2010-05-28 2013-07-17 Gw Innovation Ltd Stairlift with separate handle and seat
GB2494465A (en) * 2011-09-12 2013-03-13 Steven John Bane Trolley mounted jack for moving heavy articles
GB2483799B (en) * 2011-09-16 2012-08-15 Gw Innovation Ltd Stairlift
CN105270963B (en) * 2014-06-20 2017-09-29 郑永如 Pedestrian stairway, which is installed additional, exempts to wait elevator
USD898323S1 (en) * 2018-01-08 2020-10-06 Devi-Group Bv Stair track rail

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL160223C (en) * 1975-07-17 1979-10-15 Reus Nv J De STAIRLIFT.
DE3115778C2 (en) * 1981-04-18 1984-11-22 Kleindienst GmbH, 8900 Augsburg Inclined stair lift
SE450890B (en) * 1982-12-06 1987-08-10 Tumac Ab Multi-purpose transport system
DE3425998A1 (en) * 1984-07-14 1986-01-16 Nitzke, Paul, 4790 Paderborn Inclined lift
SE9401486D0 (en) * 1994-05-01 1994-05-01 Bengt Johansson Steering guide arrangements and steps at stair lifts

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9629272A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113104704A (en) * 2021-04-08 2021-07-13 河南科技大学 Elevator for additional installation in existing building

Also Published As

Publication number Publication date
WO1996029272A1 (en) 1996-09-26
SE9500995D0 (en) 1995-03-21
SE9500995L (en) 1996-09-22
SE504141C2 (en) 1996-11-18

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