EP1828043A2 - Elevator counterweight with buffer - Google Patents

Elevator counterweight with buffer

Info

Publication number
EP1828043A2
EP1828043A2 EP04812742A EP04812742A EP1828043A2 EP 1828043 A2 EP1828043 A2 EP 1828043A2 EP 04812742 A EP04812742 A EP 04812742A EP 04812742 A EP04812742 A EP 04812742A EP 1828043 A2 EP1828043 A2 EP 1828043A2
Authority
EP
European Patent Office
Prior art keywords
counterweight
buffer member
elevator system
elevator car
buffer
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
EP04812742A
Other languages
German (de)
French (fr)
Other versions
EP1828043A4 (en
EP1828043B1 (en
Inventor
Fernando Del Rio
Andres Monzon
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.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
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 Otis Elevator Co filed Critical Otis Elevator Co
Publication of EP1828043A2 publication Critical patent/EP1828043A2/en
Publication of EP1828043A4 publication Critical patent/EP1828043A4/en
Application granted granted Critical
Publication of EP1828043B1 publication Critical patent/EP1828043B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/28—Buffer-stops for cars, cages, or skips
    • B66B5/284—Buffer-stops for cars, cages, or skips mounted on cars or counterweights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/12—Counterpoises

Definitions

  • This invention generally relates to elevator systems. More particularly, this invention relates to an elevator counterweight having a buffer supported on the counterweight.
  • Elevator systems often include an elevator car and counterweight coupled together by a rope so that the two move together within a hoistway, for example. It is common practice to provide a buffer in a pit to absorb impact with the counterweight in the event that the counterweight drops to a lowest possible position where the counterweight contacts the buffer. The position of the buffer typically dictates the range of motion of the counterweight in a downward direction, which corresponds to a range of motion for the elevator car in an upward direction.
  • An example counterweight for use in an elevator system includes a frame that defines an outer edge of at least one side of the counterweight.
  • a buffer member is supported by the frame and moveable between a first position where a first fixed length of the buffer member extends beyond the outer edge and a second position where a second, shorter fixed length of the buffer member extends beyond the outer edge.
  • One example includes a locking member that selectively locks the buffer member in the first and second positions, respectively.
  • a controller activates the locking member responsive to an elevator system operation condition for appropriately controlling the position of the buffer member relative to the frame.
  • One example includes a receiver portion of the counterweight frame that at least partially receives the buffer member.
  • the buffer member is moveable within the receiver portion such that a first length of the buffer member is received in the receiver portion when the buffer member is in the first position. A second, greater length of the buffer member is received in the receiver portion in the second position.
  • the buffer member is effectively retractable into the counterweight.
  • An example elevator system includes an elevator car supported for vertical movement.
  • a counterweight is associated with the elevator car such that the counterweight moves when the elevator car moves.
  • a buffer member is supported on the counterweight for movement with the counterweight.
  • the buffer member has a first fixed position relative to the counterweight that allows a first range of movement of the elevator car.
  • the buffer member has a second fixed position relative to the counterweight that allows a second, greater range of movement of the elevator car.
  • One example includes a controller that maintains the buffer member in a selected one of the first or second positions responsive to an elevator system operation condition. In one example, the controller maintains the buffer in the first position when the elevator system is in an inspection mode.
  • the counterweight is moveable in a direction toward a structure so that the buffer member contacts the structure to cause the buffer member to move into the second position.
  • Figure 1 schematically illustrates selected portions of an elevator system.
  • Figure 2 schematically illustrates an example counterweight designed according to an embodiment of this invention including a buffer member in one operating position.
  • Figure 3 schematically illustrates the embodiment of Figure 2 with the buffer member in another operating position.
  • FIG 1 schematically shows an elevator system 20 that includes an elevator car and a counterweight 24 that are coupled by a load bearing assembly 26.
  • the example arrangement includes sheaves 28 over which the load bearing assembly 26 travels to cause movement of the elevator car 22 between different levels in a building as desired in a known manner.
  • a controller 30 controls movement of the elevator car 22 and the counterweight 24.
  • An example counterweight 24 is schematically shown in Figure 2.
  • the counterweight 24 includes a structure 32 that has at least one outer edge 34, which defines a lower edge of the counterweight 24 in the illustration.
  • the example structure 32 comprises a frame that supports a plurality of plates 36 in a known manner to establish the desired mass of the counterweight 24.
  • a receiver portion 38 is supported by the structure 32. In one example, the receiver portion 38 is generally cylindrical and hollow.
  • a buffer member 40 is at least partially received within the receiver portion 38 such that the buffer member 40 is supported by the structure 32 for movement with the counterweight 24.
  • the example buffer member 40 includes a fixed length body 42.
  • a cushion member 44 is located near one end of the body 42.
  • One example cushion member 44 comprises a spring.
  • Another example cushion member 44 comprises elastomeric material.
  • a stop portion 46 is located near an opposite end of the body 42. The stop portion 46 controls the amount of movement of the buffer member 40 relative to the receiver portion 38. In the position shown in Figure 2, the stop member 46 encounters a stop surface 50 when the buffer member 40 is in a fully retracted position within the receiver portion 38.
  • locking members 52 have moveable portions 54 and maintain the buffer member 40 in the illustrated, retracted position.
  • the body 42 includes positioning portions 56 and 58 that cooperate with the locking members 52 to maintain the buffer member 40 in a selected position relative to the counterweight 24.
  • the moveable portions 54 are received within recesses 56 or 58 depending on the position of the buffer member 40 relative to the counterweight 24.
  • the moveable portions 54 have a sufficient strength to withstand any impact between the buffer member 40 and a structure beneath the counterweight 24 during movement of the counterweight 24 and still maintain the buffer member 40 in a desired position.
  • the moveable portions are designed to withstand an impact associated with the counterweight 24 moving at a speed up to the tripping speed of a governor that operates in a known manner.
  • the retracted position of the buffer member 40 shown in Figure 2 corresponds to a normal elevator system operating position. During normal elevator system operation, a maximum range of motion of the elevator car 22 and the counterweight 24 are desirable. Maintaining the buffer member 40 in a retracted position allows the outer edge 34 of the counterweight 24 to approach a structure at a lower end of a hoistway, such as within a pit.
  • the lowermost position in the example of Figure 2 corresponds to the cushion member 44 contacting an appropriately positioned structure near the bottom of a hoistway. The lower that the counterweight 24 is able to travel, the higher that the elevator car 22 is able to travel.
  • a controller 60 controls the locking members 52 to selectively release the body 42 to move between the retracted position shown in Figure 2 and the extended position shown in Figure 3.
  • a top of car inspection box may be used to signal the controller 30 regarding a desired operation of the locking members 52.
  • the locking members 52 comprise electromechanical devices such as solenoids.
  • the controller 60 controls operation of those devices to retract the moveable portions 54 so that they are clear of the recesses 56 when it is desirable to allow the buffer member 40 to move into the extended position of Figure 3.
  • the weight of the body 42 causes the buffer member 40 to effectively fall into the extended position.
  • the stop portion 46 on the body 42 cooperates with a support surface 62 of the receiver portion 38 to limit the amount of movement of the buffer member 40 into the extended position.
  • the controller 60 then operates the locking members 52 until the moveable portions 54 are received in the recesses 58. This locks the buffer member 40 into the extended position shown in Figure 2.
  • the extended position shown in Figure 3 is useful during inspection procedures, for example, because the fixed length of the body 42 extending beyond the outer edge 34 provides for a more limited range of motion of the counterweight 24.
  • the counterweight 24 is not able to travel to as low a position as was possible when the buffer member 40 was in the position shown in Figure 2. Accordingly, the elevator car 22 is not permitted to travel to as high a position when the buffer member 40 is in the extended position shown in Figure 3. This provides for maintaining a desired amount of overhead clearance between the elevator car 22 and an overhead structure such as a machine support.
  • the controller 60 operates the locking members 52 to allow the buffer member 40 to move into the extended position of Figure 3 whenever the elevator system is placed into an inspection mode.
  • the controller 60 responds by controlling the locking members 52 to allow the buffer member 40 to assume an extended position as schematically shown in Figure 3.
  • the controller 60 is a portion of the elevator system controller 30. In another example, the controller 60 is a separate, dedicated controller. In another example, the locking members 52 can be manually controlled for selectively locking the buffer member 40 into a desired position relative to the counterweight 24.
  • the counterweight 24 can be allowed to move downward (according to the drawings) until the buffer member 40 contacts a structure that effectively pushes the buffer member 40 upward relative to the downwardly moving counterweight 24.
  • the hoistway pit includes a structure that contacts the cushion 44.
  • the controller 30 automatically moves the elevator car 22 and counterweight 24 in a manner to facilitate moving the buffer member 40 into the retracted position by lowering the counterweight 24.
  • a mechanic or technician manually causes movement of the elevator system components so that the buffer member 40 is effectively pushed into the retracted position as the counterweight 24 approaches a structure near the bottom of the hoistway, for example.
  • the disclosed example provides cost saving and space saving advantages compared to arrangements where a buffer is maintained in a hoistway pit. With the disclosed example, there is less need for space and materials in a pit. Additionally, there is a savings in labor costs as no buffer need be installed on site in the pit.

Landscapes

  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Cage And Drive Apparatuses For Elevators (AREA)

Abstract

An elevator system (20) includes a counterweight (24) that has a buffer member (40) that travels with the counterweight (24). A locking member (52) secures the buffer member (40) in a first position where a first length of the buffer member (40) extends beyond an outer edge (34) of the counterweight (24). The buffer member is selectively moveable into a second, retracted position relative to the counterweight (24) to allow a greater range of motion. Placing the buffer member (40) in an extended position provides overhead clearance above an associated elevator car. Placing the buffer member (40) in a retracted position provides a full range of motion of elevator system components.

Description

ELEVATORCOUNTERWEIGHTWITHBUFFER
1. Field of the Invention
This invention generally relates to elevator systems. More particularly, this invention relates to an elevator counterweight having a buffer supported on the counterweight.
2. Description of the Related Art
Elevator systems often include an elevator car and counterweight coupled together by a rope so that the two move together within a hoistway, for example. It is common practice to provide a buffer in a pit to absorb impact with the counterweight in the event that the counterweight drops to a lowest possible position where the counterweight contacts the buffer. The position of the buffer typically dictates the range of motion of the counterweight in a downward direction, which corresponds to a range of motion for the elevator car in an upward direction.
Under some circumstances, low overhead clearance above an elevator car may be a concern. With such arrangements, there is more limited overhead clearance between the top of an elevator car assembly and a stationary structure such as hoistway ceiling or a machine support within an elevator hoistway, for example, when the counterweight is in a lowest possible position.
During an inspection or maintenance procedure, for example, it is important to maintain adequate overhead clearance above an elevator car to allow an individual to be on top of the car during an inspection or maintenance procedure without risking an undesirable collision with the overhead structure in the hoistway. It is desirable to address such situations without introducing additional costs and still maintain the space savings associated with machine roomless elevator systems, for example.
There is a need for an efficient arrangement for providing sufficient overhead clearance above an elevator car under appropriate circumstances. This invention addresses that need. SUMMARY OF THE INVENTION
An example counterweight for use in an elevator system includes a frame that defines an outer edge of at least one side of the counterweight. A buffer member is supported by the frame and moveable between a first position where a first fixed length of the buffer member extends beyond the outer edge and a second position where a second, shorter fixed length of the buffer member extends beyond the outer edge.
One example includes a locking member that selectively locks the buffer member in the first and second positions, respectively. In one example, a controller activates the locking member responsive to an elevator system operation condition for appropriately controlling the position of the buffer member relative to the frame.
One example includes a receiver portion of the counterweight frame that at least partially receives the buffer member. The buffer member is moveable within the receiver portion such that a first length of the buffer member is received in the receiver portion when the buffer member is in the first position. A second, greater length of the buffer member is received in the receiver portion in the second position. In this example, the buffer member is effectively retractable into the counterweight.
An example elevator system includes an elevator car supported for vertical movement. A counterweight is associated with the elevator car such that the counterweight moves when the elevator car moves. A buffer member is supported on the counterweight for movement with the counterweight. The buffer member has a first fixed position relative to the counterweight that allows a first range of movement of the elevator car. The buffer member has a second fixed position relative to the counterweight that allows a second, greater range of movement of the elevator car. One example includes a controller that maintains the buffer member in a selected one of the first or second positions responsive to an elevator system operation condition. In one example, the controller maintains the buffer in the first position when the elevator system is in an inspection mode.
In one example, the counterweight is moveable in a direction toward a structure so that the buffer member contacts the structure to cause the buffer member to move into the second position. The various features and advantages of this invention will become apparent to those skilled in the art from the following detailed description. The drawings that accompany the detailed description can be briefly described as follows.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 schematically illustrates selected portions of an elevator system.
Figure 2 schematically illustrates an example counterweight designed according to an embodiment of this invention including a buffer member in one operating position. Figure 3 schematically illustrates the embodiment of Figure 2 with the buffer member in another operating position.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figure 1 schematically shows an elevator system 20 that includes an elevator car and a counterweight 24 that are coupled by a load bearing assembly 26. The example arrangement includes sheaves 28 over which the load bearing assembly 26 travels to cause movement of the elevator car 22 between different levels in a building as desired in a known manner. A controller 30 controls movement of the elevator car 22 and the counterweight 24. An example counterweight 24 is schematically shown in Figure 2. The counterweight 24 includes a structure 32 that has at least one outer edge 34, which defines a lower edge of the counterweight 24 in the illustration. The example structure 32 comprises a frame that supports a plurality of plates 36 in a known manner to establish the desired mass of the counterweight 24. A receiver portion 38 is supported by the structure 32. In one example, the receiver portion 38 is generally cylindrical and hollow.
A buffer member 40 is at least partially received within the receiver portion 38 such that the buffer member 40 is supported by the structure 32 for movement with the counterweight 24. The example buffer member 40 includes a fixed length body 42. In this example, a cushion member 44 is located near one end of the body 42. One example cushion member 44 comprises a spring. Another example cushion member 44 comprises elastomeric material. A stop portion 46 is located near an opposite end of the body 42. The stop portion 46 controls the amount of movement of the buffer member 40 relative to the receiver portion 38. In the position shown in Figure 2, the stop member 46 encounters a stop surface 50 when the buffer member 40 is in a fully retracted position within the receiver portion 38.
In the position of Figure 2, locking members 52 have moveable portions 54 and maintain the buffer member 40 in the illustrated, retracted position. In this example, the body 42 includes positioning portions 56 and 58 that cooperate with the locking members 52 to maintain the buffer member 40 in a selected position relative to the counterweight 24. In this example, the moveable portions 54 are received within recesses 56 or 58 depending on the position of the buffer member 40 relative to the counterweight 24.
The moveable portions 54 have a sufficient strength to withstand any impact between the buffer member 40 and a structure beneath the counterweight 24 during movement of the counterweight 24 and still maintain the buffer member 40 in a desired position. In one example, the moveable portions are designed to withstand an impact associated with the counterweight 24 moving at a speed up to the tripping speed of a governor that operates in a known manner.
The retracted position of the buffer member 40 shown in Figure 2 corresponds to a normal elevator system operating position. During normal elevator system operation, a maximum range of motion of the elevator car 22 and the counterweight 24 are desirable. Maintaining the buffer member 40 in a retracted position allows the outer edge 34 of the counterweight 24 to approach a structure at a lower end of a hoistway, such as within a pit. The lowermost position in the example of Figure 2 corresponds to the cushion member 44 contacting an appropriately positioned structure near the bottom of a hoistway. The lower that the counterweight 24 is able to travel, the higher that the elevator car 22 is able to travel.
Under elevator system operating conditions where it is desirable to maintain a specified overhead clearance above the elevator car 22, the buffer member 40 is moveable into an extended position as shown in Figure 3. In the illustrated example, a controller 60 controls the locking members 52 to selectively release the body 42 to move between the retracted position shown in Figure 2 and the extended position shown in Figure 3. In one example, a top of car inspection box may be used to signal the controller 30 regarding a desired operation of the locking members 52.
In one example, the locking members 52 comprise electromechanical devices such as solenoids. The controller 60 controls operation of those devices to retract the moveable portions 54 so that they are clear of the recesses 56 when it is desirable to allow the buffer member 40 to move into the extended position of Figure 3. In one example, the weight of the body 42 causes the buffer member 40 to effectively fall into the extended position. The stop portion 46 on the body 42 cooperates with a support surface 62 of the receiver portion 38 to limit the amount of movement of the buffer member 40 into the extended position. The controller 60 then operates the locking members 52 until the moveable portions 54 are received in the recesses 58. This locks the buffer member 40 into the extended position shown in Figure 2.
The extended position shown in Figure 3 is useful during inspection procedures, for example, because the fixed length of the body 42 extending beyond the outer edge 34 provides for a more limited range of motion of the counterweight 24. The counterweight 24 is not able to travel to as low a position as was possible when the buffer member 40 was in the position shown in Figure 2. Accordingly, the elevator car 22 is not permitted to travel to as high a position when the buffer member 40 is in the extended position shown in Figure 3. This provides for maintaining a desired amount of overhead clearance between the elevator car 22 and an overhead structure such as a machine support.
In one example, the controller 60 operates the locking members 52 to allow the buffer member 40 to move into the extended position of Figure 3 whenever the elevator system is placed into an inspection mode. There are known techniques for placing an elevator system into inspection mode and those skilled in the art who have the benefit of this description will realize how to configure a controller or the locking members 52 to operate responsive to an elevator system entering an inspection mode. In one example, whenever a hoistway access is open, the controller 60 responds by controlling the locking members 52 to allow the buffer member 40 to assume an extended position as schematically shown in Figure 3.
In one example, the controller 60 is a portion of the elevator system controller 30. In another example, the controller 60 is a separate, dedicated controller. In another example, the locking members 52 can be manually controlled for selectively locking the buffer member 40 into a desired position relative to the counterweight 24.
Once an inspection or maintenance procedure has been completed or it is otherwise desirable to move the buffer member 40 from the extended position of Figure 3 into the retracted position of Figure 2, the counterweight 24 can be allowed to move downward (according to the drawings) until the buffer member 40 contacts a structure that effectively pushes the buffer member 40 upward relative to the downwardly moving counterweight 24. In one example, the hoistway pit includes a structure that contacts the cushion 44.
In one example, the controller 30 automatically moves the elevator car 22 and counterweight 24 in a manner to facilitate moving the buffer member 40 into the retracted position by lowering the counterweight 24. In another example, a mechanic or technician manually causes movement of the elevator system components so that the buffer member 40 is effectively pushed into the retracted position as the counterweight 24 approaches a structure near the bottom of the hoistway, for example.
Supporting a buffer member for movement with an elevator counterweight and allowing the buffer member to be selectively fixed in a position relative to the counterweight, allows for controlling the range of motion of elevator system components. The disclosed example provides cost saving and space saving advantages compared to arrangements where a buffer is maintained in a hoistway pit. With the disclosed example, there is less need for space and materials in a pit. Additionally, there is a savings in labor costs as no buffer need be installed on site in the pit.
The preceding description is exemplary rather than limiting in nature. Variations and modifications to the disclosed examples may become apparent to those skilled in the art that do not necessarily depart from the essence of this invention. The scope of legal protection given to this invention can only be determined by studying the following claims.

Claims

CLAIMSWe claim:
1. A counterweight for use in an elevator system, comprising: a buffer member that is moveable between a first position where a first fixed length of the buffer member extends beyond an outer edge of the counterweight and a second position where a second, shorter fixed length of the buffer member extends beyond the outer edge.
2. The counterweight of claim 1, wherein a portion of the buffer member is retracted inward toward a center of the counterweight in the second position.
3. The counterweight of claim 1, including a locking member that selectively locks the buffer member in the first and second positions, respectively.
4. The counterweight of claim 3, including a controller that activates the locking member responsive to an elevator system operation condition.
5. The counterweight of claim 3, wherein the buffer member includes a positioning portion that cooperates with the locking member for maintaining the buffer member in a selected one of the first or second positions.
6. The counterweight of claim 5, wherein the positioning portion comprises at least one recess in a portion of the buffer member positioned near the locking member when the buffer member is in the second position.
7. The counterweight of claim 6, including at least one other recess in another portion of the buffer member positioned near the locking member when the buffer member is in the first position.
8. The counterweight of claim 3, wherein the locking member comprises an electromechanical device having a moving portion that selectively moves into a locking position for locking the buffer member in a selected one of the positions.
9. The counterweight of claim 1, wherein the counterweight comprises a structure and the buffer member is moveable within a receiver portion associated with the structure, a first length of the buffer member being received in the receiver portion in the first position and a second, greater length of the buffer member being received in the receiver portion in the second position.
10. The counterweight of claim 9, wherein the buffer member has one end received within the receiver portion that includes a stop and the receiver portion includes a support surface that cooperates with the stop to maintain the buffer member at least partially within the receiver portion.
11. The counterweight of claim 9, wherein the buffer member has a fixed length.
12. An elevator system comprising: an elevator car supported for vertical movement; a counterweight associated with the elevator car such that the counterweight moves when the elevator car moves; and a buffer member supported on the counterweight for movement with the counterweight, the buffer member having a first fixed position relative to the counterweight that allows a first range of movement of the elevator car and a second fixed position relative to the counterweight that allows a second, greater range of movement of the elevator car.
13. The elevator system of claim 12, including a controller that maintains the buffer member in a selected one of the first or second positions responsive to an elevator system operation condition.
14. The elevator system of claim 13, wherein the controller maintains the buffer in the first position when the elevator system is in an inspection mode.
15. The elevator system of claim 12, including a locking member that locks the buffer member in a selected one of the first or second positions.
16. The elevator system of claim 15, wherein the buffer member includes at least one recess that receives a portion of the locking member for maintaining the buffer member in the selected position.
17. The elevator system of claim 12, including a controller that controls movement of the elevator car and the counterweight and selectively causes the counterweight to move in a manner to move the buffer member from the first position to the second position.
18. The elevator system of claim 17, wherein the first position includes at least a portion of the buffer member extending away from the counterweight and the controller causes the car or the counterweight to move in a direction toward a structure so that the buffer member contacts the structure to cause the buffer member to move into the second position.
19. A method of controlling a range of movement of an elevator car that is associated with a counterweight that moves when the elevator car moves, the counterweight having a buffer member supported on the counterweight, comprising the steps of: placing the buffer member in a first position where at least a portion of the buffer member extends away from the counterweight to allow a first range of motion of the elevator car; and placing the buffer member in a second, retracted position relative to the counterweight to allow a second, greater range of motion of the elevator car.
20. The method of claim 19, including causing the counterweight to move toward a surface that contacts the buffer member to move the buffer member toward the second, retracted position.
EP04812742A 2004-12-03 2004-12-03 Elevator counterweight with buffer Not-in-force EP1828043B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2004/040297 WO2006062499A2 (en) 2004-12-03 2004-12-03 Elevator counterweight with buffer

Publications (3)

Publication Number Publication Date
EP1828043A2 true EP1828043A2 (en) 2007-09-05
EP1828043A4 EP1828043A4 (en) 2010-11-03
EP1828043B1 EP1828043B1 (en) 2012-05-02

Family

ID=36578339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04812742A Not-in-force EP1828043B1 (en) 2004-12-03 2004-12-03 Elevator counterweight with buffer

Country Status (4)

Country Link
EP (1) EP1828043B1 (en)
AT (1) ATE556019T1 (en)
ES (1) ES2386722T3 (en)
WO (1) WO2006062499A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2481262C2 (en) * 2005-10-12 2013-05-10 Отис Элевейтэ Кампэни Elevator system and its counterweight
ES2349514B1 (en) * 2008-07-30 2011-11-29 Orona, S. Coop. LIFTING DEVICE

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS52155749A (en) * 1976-06-18 1977-12-24 Hitachi Ltd Elevator
EP0663367A1 (en) * 1993-04-05 1995-07-19 Kone Oy Buffer structure
JPH07330253A (en) * 1994-06-06 1995-12-19 Mitsubishi Denki Bill Techno Service Kk Counterweight for elevator
US6626474B1 (en) * 1998-10-23 2003-09-30 Dytesys Shock absorbing device
WO2003082722A1 (en) * 2002-04-01 2003-10-09 Mitsubishi Denki Kabushiki Kaisha Elevator main rope elongation compensating apparatus

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Publication number Priority date Publication date Assignee Title
US392753A (en) * 1888-11-13 Charles h
US2537075A (en) * 1948-10-09 1951-01-09 Otis Elevator Co Compensating apparatus for elevator hoisting roping
US3740782A (en) * 1971-12-23 1973-06-26 Sverdrup & Parcel Ass Inc Method and apparatus for servicing counterbalanced lifting device
JPH0537847U (en) * 1991-03-25 1993-05-21 オーチス エレベータ カンパニー Linear motor elevator
US5195616A (en) * 1992-07-15 1993-03-23 Otis Elevator Company One to two stroke roped elevator pit buffers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155749A (en) * 1976-06-18 1977-12-24 Hitachi Ltd Elevator
EP0663367A1 (en) * 1993-04-05 1995-07-19 Kone Oy Buffer structure
JPH07330253A (en) * 1994-06-06 1995-12-19 Mitsubishi Denki Bill Techno Service Kk Counterweight for elevator
US6626474B1 (en) * 1998-10-23 2003-09-30 Dytesys Shock absorbing device
WO2003082722A1 (en) * 2002-04-01 2003-10-09 Mitsubishi Denki Kabushiki Kaisha Elevator main rope elongation compensating apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006062499A2 *

Also Published As

Publication number Publication date
ATE556019T1 (en) 2012-05-15
EP1828043A4 (en) 2010-11-03
ES2386722T3 (en) 2012-08-28
EP1828043B1 (en) 2012-05-02
WO2006062499A2 (en) 2006-06-15
WO2006062499A3 (en) 2006-07-27

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