FR2640604A1 - Lift with an on-board adhesion-type drive machine - Google Patents

Lift with an on-board adhesion-type drive machine Download PDF

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Publication number
FR2640604A1
FR2640604A1 FR8816574A FR8816574A FR2640604A1 FR 2640604 A1 FR2640604 A1 FR 2640604A1 FR 8816574 A FR8816574 A FR 8816574A FR 8816574 A FR8816574 A FR 8816574A FR 2640604 A1 FR2640604 A1 FR 2640604A1
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France
Prior art keywords
machine
characterized
cable
preceding
lift
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Granted
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FR8816574A
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French (fr)
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FR2640604B1 (en
Inventor
Jean-Marc Ferrary
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Otis Elevator Co
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Otis Elevator Co
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Priority to FR8816574A priority Critical patent/FR2640604B1/en
Publication of FR2640604A1 publication Critical patent/FR2640604A1/en
Application granted granted Critical
Publication of FR2640604B1 publication Critical patent/FR2640604B1/en
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Application status is Expired - Fee Related legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B11/00Main component parts of lifts in, or associated with, buildings or other structures
    • B66B11/0035Arrangement of driving gear, e.g. location or support
    • B66B11/0045Arrangement of driving gear, e.g. location or support in the hoistway
    • B66B11/005Arrangement of driving gear, e.g. location or support in the hoistway on the car
    • 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

Abstract

The invention relates to a lift with an on-board adhesion-type machine. This lift comprises at least one passenger cabin 1 moved by an adhesion-type machine 3 with a balancing counterweight 9. The drive machine 3 is mounted on board secured to the cabin 1 or to the counterweight 9. <IMAGE>

Description

ASCENSEUR AVEC MACHINE D'ENTRAINEMENT A ADHéRENCE LIFT WITH MACHINE DRIVE ADHESION
EMBARQUEE. ONBOARD.

La présente invention concerne les ascenseurs du type b machines d'entratnement fonctionnant par adhérence sur câbles de traction et avec contrepoids d'équilibrage et, en particulier, l'entratnement des cabines de ces ascenseurs. The present invention relates to elevators of the type b entratnement machines functioning by traction on the traction cables and counterweight and in particular entratnement the cabin of these elevators.

On connaît les systèmes élévateurs à plate-forme monte-charges dont le dispositif d'entrainement est solidaire de la plate-forme, ce dernier étant notamment du type à pignons engrenant sur crémaillère verticale ou à câbles enroulés sur tambour. Known lift systems platform lifts of which the drive device is secured to the platform, the latter being in particular of the type pinion meshing with vertical rack or cable wound on the drum. Ces systèmes d'entrainement n'utilisant pas de contrepoids sont en général d'un mauvais rendement énergétique et bruyants. These drive systems not using counterweights are generally of poor fuel efficiency and noise.

On sait que jusqu'à maintenant les ascenseurs à machine d'entraSnement par adhérence nécessitent l'installation des machines en poste fixe dans un local dit "local des machines de l'ascenseur". We know that until now the elevators machine entraSnement by adhesion require the installation of machines in a fixed position in a local said "local lift of the machines." Ce local peut être installé à un niveau supérieur de l'immeuble de l'ascenseur, dans une partie de superstructure de l'immeuble ou en sous-sol selon l'espace disponible ou le plan de construction choisi. This place can be installed at a higher level of the building to the elevator, in a superstructure of the building or underground depending on available space or the construction plan chosen. L'implantation d'un tel local représente en fait un court supplémentaire non négligeable. The implementation of such a local fact represents a significant additional short.

L'invention vise à remédier à ces inconvénients et propose un ascenseur du type comprenant au moins une cabine de passagers mue par une machine d'entraînement à adhérence fonctionnant avec contrepoids d'équilibrage, caractérisé en ce que ladite machine d'entrainement est montée embarquée solidaire de la cabine ou du contrepoids. The invention aims to overcome these drawbacks and proposes a type of elevator comprising at least one passenger cabin driven by a traction drive machine operating with balancing counterweights, characterized in that said drive machine is mounted on-board integral with the cage or counterweight.

Dans cette disposition selon l'invention le guidage de la cabine reste classique, de même que la configuration générale du ou des câbles de traction, le mouflage de la cabine et du contrepoids, excepté que ce câble doit être relié par au moins une extrémité à un point fixe, ou à un point de la cabine ou du contrepoids selon le mouflage choisi. In this arrangement according to the invention the guiding of the cabin remains vector, as well as the general configuration of the traction cables, the pulley system of the car and counterweight, except that this cable must be connected by at least one end to a fixed point, or a point of the cage or counterweight according to the selected reeving.

La machine est de préférence enfermée dans un caisson isolé (d'isolation phonique en particulier), lequel peut être monté en liaison relativement souple sur la cabine ou son châssis (ou le contrepoids) de façon à ce que les vibrations et les bruits émanant de la machine proche soient convenablement filtrés en vue du confort de transport des passagers. The machine is preferably enclosed in an insulated casing (sound insulation in particular), which can be mounted relatively flexible connection of the cab or frame (or the counterweight) so that vibration and noise emanating from near the machine are properly screened for the passenger carrying comfort.

I1 est à noter que les machines d'ascenseur actuelles sont de dimensions réduites et que l'implantation de la machine et de son caisson sur la cabine ne nécessite qu'un encombrement supplémentaire relativement faible. I1 should be noted that current lift machines are reduced in size and the location of the machine and its box on the cabin requires only a relatively small bulk. A titre d'exemple pour une cabine d'ascenseur classique de 8 personnes (cas de la machine au-dessus de la cabine), la hauteur supplémentaire due au caisson est de 0,2m environ. For example for a conventional elevator car 8 persons (case of the machine above the cab), the extra height due to the box is approximately 0,2m.

La machine d'entrainement dans son caisson pouvant être montée au-dessus ou au-dessous de la cabine (cabine suspendue ou portée), le supplément d'encombrement de l'unité mobile devra être prévu dans la construction de la gaine qui sera donc légèrement relevée ou approfondie en cuvette en conformité. The training machine in its casing can be mounted above or below the cab (cabin suspended or range), the additional congestion of the mobile unit must be provided in the construction of the sheath that will be slightly raised or depth in compliance bowl. En contrepartie, on élimine le local de machinerie avec ses exigences d'implantation et de maintenance dans l'immeuble. In return, the machine room is eliminated with its demands implementation and maintenance in the building.

Le supplément de poids pour la machine et son caisson est également faible relativement au poids de la cabine et à sa charge moyenne, de l'ordre de 150kg pour la cabine précitée de 8 personnes, de sorte qu'il ne joue pratiquement pas dans le niveau d'accélération des masses en mouvement. The additional weight to the machine and its enclosure is also low on the weight of the cabin and its average load of about 150kg for the aforementioned cabin 8 people, so it hardly plays in level of acceleration of the masses in motion.

La préfabrication des éléments d'ascenseurs en usine est en outre accrue et comme la majeure partie de l'électronique de commande, qui reste classique, peut être montée également embarquée avec l'unité cabine et/ou machine, on simplifie la liaison électrique relativement à la technique connue avec local de machinerie. Prefabrication factory elevators elements is further increased, and as most of the control electronics, which remains vector, can also be embedded mounted with the cabin unit and / or machine, simplifies the electrical connection relatively to the known art with machine room. Ceci permet de réduire le temps de montage sur chantier de l'ascenseur. This reduces the installation time on site of the elevator.

L'invention est décrite ci-après à l'aide d'exemples de réalisation et en référence aux dessins annexés sur lesquels The invention is described below using exemplary embodiments and with reference to the accompanying drawings in which
La figure 1 montre une vue schématique d'un ascenseur selon l'invention, la machine d'entrainement étant disposée sous la cabine et cette dernière étant portée Figure 1 shows a schematic view of an elevator according to the invention, the drive machine being disposed under the cab and the latter being carried
La figure 2 montre une autre vue schématique avec machine analogue où la cabine est suspendue, et 2 shows another schematic view similar machine with which the cab is suspended, and
Les figures 3 à 5 montrent des variantes de réalisation de l'invention. Figures 3 to 5 show alternative embodiments of the invention.

Comme représenté sur la figure 1, l'ascenseur selon l'invention comprend une cabine de passagers 1, une machine d'entrainement 3 du type à adhérence disposée sous la cabine 1 et un câble de traction 5 grâce auquel se met l'ensemble cabine 1 et machine solidaire 3. Cet ensemble se déplace dans une gaine d'ascenseur classique (non représentée). As shown in Figure 1, the elevator according to the invention comprises a passenger cabin 1, a driving machine 3 of the adhesion type disposed under the cab 1 and a traction cable 5 through which goes the entire cab 1 and 3. This machine integral assembly moves in a conventional hoistway (not shown). Le câble est fixé par ses extrémités à deux points fixes hauts 7, sensiblement à la verticale respectivement de la cabine 1 et du contrepoids 9, et porte entre ces points la cabine et ledit contrepoids d'équilibrage 9 par un mouflage simple central haut 11. Le contrepoids 9 est mû de façon classique en sens inverse de la cabine 1. Le groupe d'entrainement 13 de la machine est enfermé dans un caisson isolé phoniquement 15 monté avec silent-blocs 17 solidairement à la cabine.Le câble 5 s'enroule sur une arc d'environ 1800 autour de la poulie motrice 19 du groupe 13 par l'intermédiaire de deux poulies collatérales de renvoi 21 disposées avec symétrie axiale relativement à cette dernière. The cable is attached by its ends to two fixed points 7 high, substantially vertically respectively, of the car 1 and the counterweight 9, and door between these points the car and said counterweight 9 by a simple central hauling top 11. the counterweight 9 is moved in a conventional manner in opposite direction of the car 1. the drive unit 13 of the machine is enclosed in an acoustically insulated case 15 mounted with silent-blocks 17 firmly to the cable 5 is wound cabine.Le on an arc of about 1800 around the driving pulley 19 of the group 13 by means of two collateral pulleys 21 arranged with axial symmetry with respect to the latter. La cabine est ainsi portée par la machine. The cabin is thus carried by the machine.

A la figure 2, la machine 3 est disposée au-dessus de la cabine 1; In Figure 2, the machine 3 is arranged above the cab 1; cette dernière est donc suspendue à la machine. the latter is suspended in the machine. La cinématique du mouvement reste la même que précédemment. The kinematic motion is the same as above.

A la figure 3, l'enroulement sur la poulie motrice 19 de la machine est effectué sur un arc plus grand que précédemment en faisant revenir le câble sur celle-ci par une poulie collatérale 21 sensiblement médiane. In Figure 3, the winding on the driving pulley 19 of the machine is carried out over a larger arc than previously by returning the cable thereon by a substantially medial collateral pulley 21.

L'adhérence du câble sur la poulie motrice est accrue et par ailleurs cette disposition élimine les torsions alternées du câble entre la poulie motrice et les collatérales comme précédemment, de sorte que le vieillissement en travail du câble est ici réduit. The adhesion of the cable on the drive pulley is increased and also this arrangement eliminates the cable twists alternate between the driving pulley and collaterals as previously, so that the cable work aging is here reduced.

A la figure 4, outre que l'adhérence a été accrue en augmentant l'arc d'enroulement du câble autour de la poulie motrice 19 de la machine par le jeu des poulies collatérales 21 convenablement disposées dont l'une reçoit le câble et l'autre porte deux enroulements, les brins du câble ont été regroupés sur un seul côté de la cabine. In Figure 4, further that the adhesion was increased by increasing the cable winding arc around the drive pulley 19 of the machine by the game collateral pulleys 21 suitably arranged one of which receives the cable and other carries two windings, cable strands were grouped on one side of the cabin.

A la figure 5, on a formé un mouflage supplémentaire 23 au-dessus de la cabine et au-dessus du contrepoids et relié les deux extrémités du câble de traction respectivement à la partie haute du contrepoids 9 et à la partie haute de la cabine 1. Grâce à ce mouflage en coopération avec le mouflage Il central, le couple exigé pour l'entrainement par la machine est réduit, de même que le niveau d'adhérence du câble sur la poulie motrice, ici formé sur un arc de 1800 et sans poulie collatérale. In Figure 5, an additional hauling has been formed 23 above the cab and above the counterweight and connected to the two ends of the traction cable to the upper part respectively of the counterweight 9 and the upper part of the cab 1 . Thanks to this reeving in cooperation with the central hauling There, the required torque for the drive by the machine is reduced as well as the cable adhesion level on the drive pulley, here formed on an arc of 1800, and without collateral pulley. On notera encore que la cabine et la machine sont montées sur une plate-forme 25 guidée de façon classique et qui peut servir de monte-charges lors de la construction de l'immeuble quand elle est utilisée sans cabine. It will also be noted that the cabin and the machine are mounted on a platform 25 guided by conventional means and that can serve as lifting during construction of the building when it is used without cab.

Dans la variante avec machine d'entraînement sur contrepoids, la cinématique du mouvement reste identique au cas précité avec machine d'entraînement solidaire de la cabine. In the variant with drive machine counterweight, the kinematics of the movement is identical to the aforementioned case with integral drive machine of the cabin. Cependant, dans cette disposition, il sera plus facile de s'isoler des bruits et vibrations de. However, in this arrangement, it will be easier to isolate noise and vibration.

fonctionnement du fait de la distance entre la machine d'entrainement et la cabine de passagers. operation due to the distance between the drive machine and the passenger cabin.

L'invention apporte ainsi une nouvelle conception de l'entrainement des ascenseurs avec machines à adhérence, qui supprime notamment le local de machinerie d'ascenseur traditionnel dans les immeubles. The invention thus provides a new approach to training lifts with traction machines, which particularly suppresses the local traditional elevator machinery in buildings.

Claims (11)

REVENDICATIONS
1- Ascenseur du type comprenant au moins une cabine de passagers (1) mue par une machine à adhérence (3) avec contrepoids d'équilibrage (9), caractérisé en ce que ladite machine d'entratnement (3)est montée embarquée solidaire de la cabine (1) ou du contrepoids (9). 1- Lift the type comprising at least one passenger cabin (1) driven by a traction machine (3) with counterweight balancing (9), characterized in that said machine entratnement (3) is mounted integral with embedded the cab (1) or of the counterweight (9).
2- Ascenseur selon la revendication 1, caractérisé en ce que au moins une extrémité du câble d'entraInement (5) est reliée à un point fixe (7), la cabine (1) se déplaçant relativement au câble. 2. Elevator according to claim 1, characterized in that at least one end of the cable drive (5) is connected to a fixed point (7), the car (1) moving relatively to the cable.
3- Ascenseur selon ltune des revendications 1 et 2, caractérisé en ce que le câble (5) est relié par ses extrémités à deux points fixes hauts (7) sensiblement à la verticale respectivement de la cabine (1) et du contrepoids (9). 3- ltune Lift according to claim 1 or 2, characterized in that the cable (5) is connected by its ends to two fixed high points (7) substantially vertically cabin respectively (1) and the counterweight (9) .
4- Ascenseur selon la revendication 1, caractérisé en ce que au moins une extrémité du câble (5) est reliée à la cabine (1) ou au contrepoids (9) (cas des mouflages (11,23) de la figure 5). 4. Elevator according to claim 1, characterized in that at least one end of the cable (5) is connected to the cab (1) or the counterweight (9) (case of hauling (11,23) of Figure 5).
5- Ascenseur selon l'une des revendications précédentes, caractérisé en ce que la machine d'entraSnement (3) est enfermée dans un caisson isolé (15) (isolation phonique du bruit de machine). 5. Lift according to one of the preceding claims, characterized in that the machine entraSnement (3) is enclosed in an insulated casing (15) (soundproofing machine noise).
6- Ascenseur selon l'une des revendications précédentes, caractérisé en ce que la machine d'entrainement (3) est disposée au-dessus de la cabine (1). 6. Lift according to one of the preceding claims, characterized in that the drive machine (3) is disposed above the car (1).
7- Ascenseur selon l'une des revendications précédentes, caractérisé en ce que la machine d'entraSnement (3) est disposée sous la cabine (1). 7. Lift according to one of the preceding claims, characterized in that the machine entraSnement (3) is arranged beneath the cab (1).
8- Ascenseur selon l'une des revendications précédentes, caractérisé en ce que la majeure partie des éléments d'électronique de commande de l'ascenseur est montée sur l'ensemble cabine et machine d'entraSnement. 8. Lift according to one of the preceding claims, characterized in that the major part of the elevator control electronic components is mounted on the assembly cabin and entraSnement machine.
9- Ascenseur selon l'une des revendications précédentes, caractérisé en ce que le caisson (15) est monté en liaison relativement souple à la cabine (1) de manière à filtrer les vibrations de fonctionnement. 9. Lift according to one of the preceding claims, characterized in that the box (15) is mounted relatively flexible connection to the cab (1) so as to filter the vibrations of operation.
10- Ascenseur selon l'une des revendications précédentes, caractérisé en ce que l'adhérence du câble (5) sur la poulie motrice (19) de la machine est réglée de façon variable en modifiant d'une part le mouflage du câble et d'autre part l'arc d'enroulement du câble sur celle-ci par l'intermédiaire de poulies collatérales (21). 10- Lift according to one of the preceding claims, characterized in that the adhesion of the cable (5) on the drive pulley (19) of the machine is variably adjustable by changing a part of the hauling cable and Moreover the cable winding arc thereon via collaterals pulleys (21).
11- Ascenseur selon la revendications 1, caractérisé en ce que la cabine (1) et la machine (3) sont montées sur une plate-forme guidée (25). 11. Elevator according to claims 1, characterized in that the cabin (1) and the machine (3) are mounted on a guided platform (25).
FR8816574A 1988-12-15 1988-12-15 Elevator with drive machine adhesion embarquee Expired - Fee Related FR2640604B1 (en)

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FR8816574A FR2640604B1 (en) 1988-12-15 1988-12-15 Elevator with drive machine adhesion embarquee

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FR2640604B1 FR2640604B1 (en) 1991-03-08

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Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565516A1 (en) * 1992-04-09 1993-10-13 Werner Mag. Dr. Hagel Elevator
EP0606875A1 (en) * 1993-01-11 1994-07-20 Kone Oy Elevator motor placed in the counterweight
US5429211A (en) * 1993-06-28 1995-07-04 Kone Oy Traction sheave elevator
WO1997011020A1 (en) * 1995-09-21 1997-03-27 Kone Oy Traction sheave elevator without machine room
EP0924156A2 (en) * 1997-12-09 1999-06-23 Maspero Elevatori S.r.l. Elevator with onboard driving means
WO1999043600A1 (en) * 1998-02-26 1999-09-02 Otis Elevator Company Elevator system having drive motor located at the bottom portion of the hoistway
WO1999043595A2 (en) * 1998-02-26 1999-09-02 Otis Elevator Company Machine-roomless elevator system with an elevator machine mounted on an elevator car
WO1999043601A2 (en) * 1998-02-26 1999-09-02 Otis Elevator Company Dual sheave rope climber using flat flexible ropes
US6039152A (en) * 1998-10-30 2000-03-21 Otis Elevator Company Elevator system with controller located under elevator landing
DE19860458C1 (en) * 1998-12-28 2000-06-29 System Antriebstechnik Dresden Cable drive for building hoists or lifts has support cable guided round two drive pulleys fixed on basket with their own motorized drives
US6085874A (en) * 1998-12-22 2000-07-11 Otis Elevator Company Rail-climbing elevator counterweight having flat machines
EP1028082A2 (en) 1999-02-10 2000-08-16 Mitsubishi Denki Kabushiki Kaisha Elevator system
US6138799A (en) * 1998-09-30 2000-10-31 Otis Elevator Company Belt-climbing elevator having drive in counterweight
US6193016B1 (en) 1997-03-27 2001-02-27 Otis Elevator Company Dual sheave rope climber using flat flexible ropes
US6202793B1 (en) 1998-12-22 2001-03-20 Richard N. Fargo Elevator machine with counter-rotating rotors
US6305499B1 (en) 1998-09-30 2001-10-23 Otis Elevator Company Drum drive elevator using flat belt
WO2002059028A2 (en) * 2001-01-25 2002-08-01 Kone Corporation Elevator
DE10104351A1 (en) * 2001-02-01 2002-08-22 Ingenieurgesellschaft Foerder Lift (elevator) with drive and control units traveling with cabin has these units mounted on cabin roof
US6460657B1 (en) * 1999-01-22 2002-10-08 Siemag Transplan Gmbh Conveyor apparatus for open-cut mining
US6478117B2 (en) 1998-10-30 2002-11-12 Otis Elevator Company Elevator system having governor positioned under controller in hoistway at top floor level
US6591945B1 (en) * 1999-09-24 2003-07-15 Mitsubishi Denki Kabushiki Kaisha Self propelled elevator
WO2003099696A1 (en) * 2002-05-28 2003-12-04 Kone Corporation Method for making an elevator and system for elevator delivery
US6742627B2 (en) * 2001-07-27 2004-06-01 Otis Elevator Company Elevator pressure traction arrangement
US6848543B2 (en) 1998-10-30 2005-02-01 Otis Elevator Company Single wall interface traction elevator
US6860367B1 (en) 1998-09-29 2005-03-01 Otis Elevator Company Elevator system having drive motor located below the elevator car
US6892862B2 (en) 2000-07-29 2005-05-17 Alpha Getriebebau Gmbh Elevator car with a driving pulley driving machine integrated therein
EP1808399A2 (en) * 1998-02-26 2007-07-18 Otis Elevator Company Belt-climbing elevator having drive in counterweight
US7246688B2 (en) 1998-12-23 2007-07-24 Otis Elevator Company Elevator door system
US7299896B1 (en) 1998-09-29 2007-11-27 Otis Elevator Company Elevator system having drive motor located adjacent to hoistway door
EP1911715A1 (en) * 1998-02-26 2008-04-16 Otis Elevator Company Elevator system having drive motor located at the bottom portion of the hoistway
US7448474B2 (en) 2002-05-28 2008-11-11 Kone Corporation Method for making an elevator and system for elevator delivery
US7478705B2 (en) * 2004-08-09 2009-01-20 Inventio Ag Elevator
US20110061976A1 (en) * 2009-09-17 2011-03-17 Tiner James L Battery counterweighted elevator

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US7874404B1 (en) 1998-09-29 2011-01-25 Otis Elevator Company Elevator system having drive motor located between elevator car and hoistway sidewall

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WO1984000743A1 (en) * 1982-08-06 1984-03-01 Wolfgang Schaffer Lift
DE3523187A1 (en) * 1985-06-28 1987-01-08 Rainer Boll Lift in buildings
WO1987002344A1 (en) * 1985-10-09 1987-04-23 Inliftor Ab Arrangement for mounting a lift driving device

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565516A1 (en) * 1992-04-09 1993-10-13 Werner Mag. Dr. Hagel Elevator
EP0606875A1 (en) * 1993-01-11 1994-07-20 Kone Oy Elevator motor placed in the counterweight
US5435417A (en) * 1993-01-11 1995-07-25 Kone Oy Elevator motor placed in the counterweight
US5429211A (en) * 1993-06-28 1995-07-04 Kone Oy Traction sheave elevator
WO1997011020A1 (en) * 1995-09-21 1997-03-27 Kone Oy Traction sheave elevator without machine room
US6193016B1 (en) 1997-03-27 2001-02-27 Otis Elevator Company Dual sheave rope climber using flat flexible ropes
EP0924156A2 (en) * 1997-12-09 1999-06-23 Maspero Elevatori S.r.l. Elevator with onboard driving means
EP0924156A3 (en) * 1997-12-09 2001-09-26 Maspero Elevatori S.r.l. Elevator with onboard driving means
WO1999043595A2 (en) * 1998-02-26 1999-09-02 Otis Elevator Company Machine-roomless elevator system with an elevator machine mounted on an elevator car
WO1999043601A3 (en) * 1998-02-26 1999-10-28 Otis Elevator Co Dual sheave rope climber using flat flexible ropes
WO1999043601A2 (en) * 1998-02-26 1999-09-02 Otis Elevator Company Dual sheave rope climber using flat flexible ropes
WO1999043600A1 (en) * 1998-02-26 1999-09-02 Otis Elevator Company Elevator system having drive motor located at the bottom portion of the hoistway
EP1911715A1 (en) * 1998-02-26 2008-04-16 Otis Elevator Company Elevator system having drive motor located at the bottom portion of the hoistway
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