US3565217A - Offshore elevator improvements - Google Patents

Offshore elevator improvements Download PDF

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US3565217A
US3565217A US766473A US3565217DA US3565217A US 3565217 A US3565217 A US 3565217A US 766473 A US766473 A US 766473A US 3565217D A US3565217D A US 3565217DA US 3565217 A US3565217 A US 3565217A
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platform
cables
lower platform
elevator
fixed
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US766473A
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Donald L St Louis
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Alaska Elevator Corp
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Alaska Elevator Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/16—Arrangement of ship-based loading or unloading equipment for cargo or passengers of lifts or hoists
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices

Definitions

  • Marine or elevator platforms have been proposed and built using various devices for raising and lowering men and equipment between the ocean level and a fixed upper platform.
  • past elevator lifts or platforms have not been used very successfully in extremely rough waters where, for example, the waves may vary in height up to 30 feet.
  • the elevator lift upon which people or supplies are to be placed for raising from the water to the fixed upper platform is generally held stationary during the loading operation, while the boat or other vehicle holding the people or supplies is moving up and down on the waves. This, of course, renders it extremely difficult, if not impossible, to transfer the people or supplies from the boat to the elevator lift.
  • the primary object of this invention resides in the provision of a marine platform assembly including a fixed upper operating platform and a novel lower elevator lift platform guidingly raised and lowered by a system of flexible cables and capable of floating in the water while maintaining the cables substantially taut, thereby permitting ready transfer of people and/or supplies between the lift platform and other vehicles floating on the water.
  • Another object resides in the provision of a novel, elevator lift platform having the above described cable guide and drive system which includes a drive motor and cable drums and a clutch mechanism through which the cable drums are alternatively positively driven by the motor for raising or lowering the lift platform or permitted to run freely when the lift is floating on the water.
  • Still another object resides in the provision of a novel cable support and drive system for an elevator lift platform comprising a drive motor, cable drums, and a clutch mechanism through which the drums are alternatively driven by the motor for raising or lowering the platform or permitted to run freely when the lift is floating on the water.
  • Opposite ends of each of a plurality of cables wrapped around the drums are connected to the platform so that the cables remain substantially taut during floating, thereby causing the platform to be immediately raised upon energization of the motor and clutch.
  • FIG. 1 is a fragmentary, generally perspective view of a marine platformof the invention including the novel floating platform and its cable guide and drive system;
  • FIG. 2 is a plan view of the fixed upper operating deck and the cable drive system supported thereon;
  • FIG. 3 is a fragmentary elevation view illustrating the manner in which each cable is connected to the lift platform and its associated driving cable drum and idler pulleys.
  • the invention is illustrated as applied to a marine platform structure which comprises an upper fixed horizontal platform Bil suitably supported above the water surface and carrying all the operational equipment associated with the structure.
  • a vertically movable lower lift platform 12 is provided to raise or lower materials between the upper platform and the water surface 114.
  • Platform 10 may be supported by a central hollow vertical column secured to the ocean floor l5 and passing centrally through lower platform 12 on which various types of equip ment such as life rafts and boats may be carried.
  • Platform 12 may also be provided with suitable deck areas and guard railing which cooperate with a stairway on the underside of upper platform 10 to assist in the transfer of men and materials between platforms l0 and 12.
  • This general type construction is illustrated in applicants copending application Ser. No. 666,602, on which this invention is an improvement.
  • Lift platform 12 is adapted to float on water surface 14 and move up and down thereon as the height of the waves varies.
  • Lift platform 12 is guided and positively driven through a cable system including cables l6, 18, 20 and 22 each of which has its ends fixedly connected respectively to the top and bottom of lift 12 and has a fixed operating length and remains substantially taut at all times.
  • the cables are operated from a drive system 23 suitably supported on upper platform 10 and including electric motor 24 drivingly connected to cable drum shaft 26 through gear reduction box 28, suitable clutch mechanism 30 and bevel gear assembly 32.
  • Clutch mechanism 30 may be of any suitable type, but preferably is an electrically operated clutch having clutching and nonclutching conditions and operated by electrical control assembly 34.
  • a suitable electrical control system 36 is also provided for electric motor 24, and both electrical systems 34 and 36 may be controlled or actuated from lift platform 12.
  • Fixed at each end of shaft 26 are wrench or cable drums 38 and 40, with cables 16 and 18 being driven by drum 38 and cables 20 and 22 by drum 40.
  • Cables 16, 18, 20, and 22 are symmetrically positioned at respective corners of platform 12 and are vertically parallel to each other.
  • the cables are fixed to lift 12 identically to cable 18 which, as shown in FIG. 3, extends upwardly from fixed connection 52 through slot 41 in platform 10 over deflection idler pulley 42, around cable drum 38 with one or more number of wraps depending upon the desired traction factor, over deflection idler pulley 44 down through slot 45 in platform 10 and aperture 46 in platform 12, around idler pulley 48 fixed to rigid support 50 secured in ocean bed 15, and finally having its other end fixed at 54 to the bottom of platform 12.
  • Cables 16, 20, and 22 extend through slots identical to slots 41 and 45 around idler pulleys identical to pulleys 42, 44, and 48 and their respective drums with their ends connected to platform 12.
  • Each of the deflection idler pulleys 42 and 44 is rotatable and axially slidably mounted on a fixed axis horizontal idler axle 43 and as the cables helically wind in either direction on their respective drums, the deflection pulleys will travel back and forth along their respective axles and the platform slots such as slots 41 and 45 allow to and fro displacement of the cables.
  • the construction of the idler pulleys and axles is identical to that described in application Ser. No. 666,602.
  • each of the cables is fixed and, as lift 12 floats up and down on water surface 14, the cables remain substantially taut, thereby preventing any substantial horizontal movement but permitting a limited amount of rocking of lift 12 while guiding it for vertical movement.
  • clutch 30 is retained in a nonclutching condition, thereby rendering shaft 26, bevel gear mechanism 32, and cable drums 38 and 40 free wheeling to permit lift platform 12 to float up and down on the waves of the water along with the boat.
  • motor 24 and clutch 30 are energized through control systems 34 and 36, thereby positively driving drums 38 and 40 in a suitable direction to raise lift 12 from water surface 14 to operating platform 10.
  • drums 38 and 40 are driven in the opposite direction to lower the platform.
  • drive system 23 is effective to immediately raise platform 12 upon energization of motor 24 and clutch 30 since there is no slack in the cables to be taken up. This, of course, provides better operational control and quick response of lift platform 12.
  • An elevator assembly for an offshore marine installation in which a fixed upper platform is mounted above the normal water level of a body of water comprising a lower platform,
  • drive means comprising drum means mounted on said upper platform, motor means and clutch means selectively providing a drive connection between said motor means and said drum means, a system of cables connecting said drum means to said lower platform for raising and lowering said lower platform, cable support means fixed below the water level, each of said cables extending between said drum means, said support means, and said lower platform and having both ends connected to said lower platform, whereby when said clutch is engaged said lower platform may be driven up or down and. when said clutch is disengaged and said drum means is permitted to run freely, said lower platform may float on said water with said cables being maintained in a substantially taut condition.
  • each of said cables having one end fixed to said lower platform, the other end extending therefrom around said drum means and said support means and also being fixed to said lower platform.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

An offshore elevator structure including an elevator lift guidingly raised and lowered by a drive assembly including a system of cables and capable of floating on the water while maintaining the cables in a substantially taut condition.

Description

United States Patent Donald L. St. Louis Anchorage, Alaska Oct. 10, 1968 Feb. 23, 1971 Alaska Elevator Corporation Anchorage, Alaska a corporation of Alaska [72] Inventor [21 App]. No. [22] Filed [45] Patented [73] Assignee [54] OFFSHORE ELEVATOR IMPROVEMENTS 2 Claims, 3 Drawing Figs.
[52] U.S. Cl 187 /2 7 114/435: 187/1 1, 187/95 [51] Int. Cl. 1366b 11/04 [50] Field ofSearch 114/435;
[56] References Cited UNITED STATES PATENTS 2,972,973 2/1961 Thearle 254/172 3,300,189 1/1967 Blount.... 254/185 3,318,276 5/1967 Nemec 114/435 Primary Examiner Harvey C. Hornsby Attorney-Strauch, Nolan, Neale, Nies and Kurz ABSTRACT: An offshore elevator structure including an elevator lift guidingly raised and lowered by a drive assembly including a system of cables and capable of floating on the water while maintaining the cables in a substantially taut condition.
PATENTEU FEB2 3 IS?! SHEET 1 [1F 2 INVENTOR. DONALD ST. LOUIS MM fhy/ ATTORNEYS OFFSHORE ELEVATOR IMPROVEMENTS BACKGROUND OF THE INVENTION This invention is generally concerned with improvements in offshore elevator structures and more particularly with an offshore elevator assembly which includes an elevator lift guidingly raised and lowered by a system of cables and capable of floating up and down on the water surface with cables maintained substantially taut during flotation of the lift.
Marine or elevator platforms have been proposed and built using various devices for raising and lowering men and equipment between the ocean level and a fixed upper platform. However, past elevator lifts or platforms have not been used very successfully in extremely rough waters where, for example, the waves may vary in height up to 30 feet. In such waters, the elevator lift upon which people or supplies are to be placed for raising from the water to the fixed upper platform is generally held stationary during the loading operation, while the boat or other vehicle holding the people or supplies is moving up and down on the waves. This, of course, renders it extremely difficult, if not impossible, to transfer the people or supplies from the boat to the elevator lift.
SUMMARY OF THE INVENTION Accordingly, the primary object of this invention resides in the provision of a marine platform assembly including a fixed upper operating platform and a novel lower elevator lift platform guidingly raised and lowered by a system of flexible cables and capable of floating in the water while maintaining the cables substantially taut, thereby permitting ready transfer of people and/or supplies between the lift platform and other vehicles floating on the water.
Another object resides in the provision of a novel, elevator lift platform having the above described cable guide and drive system which includes a drive motor and cable drums and a clutch mechanism through which the cable drums are alternatively positively driven by the motor for raising or lowering the lift platform or permitted to run freely when the lift is floating on the water.
Still another object resides in the provision of a novel cable support and drive system for an elevator lift platform comprising a drive motor, cable drums, and a clutch mechanism through which the drums are alternatively driven by the motor for raising or lowering the platform or permitted to run freely when the lift is floating on the water. Opposite ends of each of a plurality of cables wrapped around the drums are connected to the platform so that the cables remain substantially taut during floating, thereby causing the platform to be immediately raised upon energization of the motor and clutch.
Other objects and advantages of the invention will become apparent from reading the detailed description of a preferred embodiment set forth below.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a fragmentary, generally perspective view of a marine platformof the invention including the novel floating platform and its cable guide and drive system;
FIG. 2 is a plan view of the fixed upper operating deck and the cable drive system supported thereon; and
FIG. 3 is a fragmentary elevation view illustrating the manner in which each cable is connected to the lift platform and its associated driving cable drum and idler pulleys.
DESCRIPTION OF THE PREFERRED EMBODIMENT The invention is illustrated as applied to a marine platform structure which comprises an upper fixed horizontal platform Bil suitably supported above the water surface and carrying all the operational equipment associated with the structure. A vertically movable lower lift platform 12 is provided to raise or lower materials between the upper platform and the water surface 114.
Platform 10 may be supported by a central hollow vertical column secured to the ocean floor l5 and passing centrally through lower platform 12 on which various types of equip ment such as life rafts and boats may be carried. Platform 12 may also be provided with suitable deck areas and guard railing which cooperate with a stairway on the underside of upper platform 10 to assist in the transfer of men and materials between platforms l0 and 12. This general type construction is illustrated in applicants copending application Ser. No. 666,602, on which this invention is an improvement.
Lift platform 12 is adapted to float on water surface 14 and move up and down thereon as the height of the waves varies. Lift platform 12 is guided and positively driven through a cable system including cables l6, 18, 20 and 22 each of which has its ends fixedly connected respectively to the top and bottom of lift 12 and has a fixed operating length and remains substantially taut at all times.
The cables are operated from a drive system 23 suitably supported on upper platform 10 and including electric motor 24 drivingly connected to cable drum shaft 26 through gear reduction box 28, suitable clutch mechanism 30 and bevel gear assembly 32. Clutch mechanism 30 may be of any suitable type, but preferably is an electrically operated clutch having clutching and nonclutching conditions and operated by electrical control assembly 34. A suitable electrical control system 36 is also provided for electric motor 24, and both electrical systems 34 and 36 may be controlled or actuated from lift platform 12. Fixed at each end of shaft 26 are wrench or cable drums 38 and 40, with cables 16 and 18 being driven by drum 38 and cables 20 and 22 by drum 40.
Cables 16, 18, 20, and 22 are symmetrically positioned at respective corners of platform 12 and are vertically parallel to each other. The cables are fixed to lift 12 identically to cable 18 which, as shown in FIG. 3, extends upwardly from fixed connection 52 through slot 41 in platform 10 over deflection idler pulley 42, around cable drum 38 with one or more number of wraps depending upon the desired traction factor, over deflection idler pulley 44 down through slot 45 in platform 10 and aperture 46 in platform 12, around idler pulley 48 fixed to rigid support 50 secured in ocean bed 15, and finally having its other end fixed at 54 to the bottom of platform 12.
Cables 16, 20, and 22 extend through slots identical to slots 41 and 45 around idler pulleys identical to pulleys 42, 44, and 48 and their respective drums with their ends connected to platform 12. Each of the deflection idler pulleys 42 and 44 is rotatable and axially slidably mounted on a fixed axis horizontal idler axle 43 and as the cables helically wind in either direction on their respective drums, the deflection pulleys will travel back and forth along their respective axles and the platform slots such as slots 41 and 45 allow to and fro displacement of the cables. The construction of the idler pulleys and axles is identical to that described in application Ser. No. 666,602.
In this novel cable system the effective operating length of each of the cables is fixed and, as lift 12 floats up and down on water surface 14, the cables remain substantially taut, thereby preventing any substantial horizontal movement but permitting a limited amount of rocking of lift 12 while guiding it for vertical movement.
During operation, when people or supplies are being transferred between a boat in the water and lift platform 12, clutch 30 is retained in a nonclutching condition, thereby rendering shaft 26, bevel gear mechanism 32, and cable drums 38 and 40 free wheeling to permit lift platform 12 to float up and down on the waves of the water along with the boat. When the transfer operation has been completed, motor 24 and clutch 30 are energized through control systems 34 and 36, thereby positively driving drums 38 and 40 in a suitable direction to raise lift 12 from water surface 14 to operating platform 10. Similarly, when platform 12 is to be lowered again, drums 38 and 40 are driven in the opposite direction to lower the platform.
Because the cables 16, 18, 20, and 22 remain substantially taut while drums 38 and 40 are free wheeling and platform 12 is floating, drive system 23 is effective to immediately raise platform 12 upon energization of motor 24 and clutch 30 since there is no slack in the cables to be taken up. This, of course, provides better operational control and quick response of lift platform 12.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
lclaim:
1. An elevator assembly for an offshore marine installation in which a fixed upper platform is mounted above the normal water level of a body of water comprising a lower platform,
drive means comprising drum means mounted on said upper platform, motor means and clutch means selectively providing a drive connection between said motor means and said drum means, a system of cables connecting said drum means to said lower platform for raising and lowering said lower platform, cable support means fixed below the water level, each of said cables extending between said drum means, said support means, and said lower platform and having both ends connected to said lower platform, whereby when said clutch is engaged said lower platform may be driven up or down and. when said clutch is disengaged and said drum means is permitted to run freely, said lower platform may float on said water with said cables being maintained in a substantially taut condition.
2. In the elevator assembly defined in claim 1, each of said cables having one end fixed to said lower platform, the other end extending therefrom around said drum means and said support means and also being fixed to said lower platform.

Claims (2)

1. An elevator assembly for an offshore marine installation in which a fixed upper platform is mounted above the normal water level of a body of water comprising a lower platform, drive means comprising drum means mounted on said upper platform, motor means and clutch means selectively providing a drive connection between said motor means and said drum means, a system of cables connecting said drum means to said lower platform for raising and lowering said lower platform, cable support means fixed below the water level, each of said cables extending between said drum means, said support means, and said lower platform and having both ends connected to said lower platform, whereby when said clutch is engaged said lower platform may be driven up or down and, when said clutch is disengaged and said drum means is permitted to run freely, said lower platform may float on said water with said cables being maintained in a substantially taut condition.
2. In the elevator assembly defined in claim 1, each of said cables having one end fixed to said lower platform, the other end extending therefrom around said drum means and said support means and also being fixed to said lower platform.
US766473A 1968-10-10 1968-10-10 Offshore elevator improvements Expired - Lifetime US3565217A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648858A (en) * 1970-05-07 1972-03-14 Byron Jackson Inc Stabilized load hoist apparatus
US3844418A (en) * 1973-11-29 1974-10-29 Case Co J I Telescoping jib assembly
US3866718A (en) * 1971-06-14 1975-02-18 Mannesmann Leichtbau Ges Mit B Reeling of load and safety cables or ropes for cages suspended in front of buildings or the like
US3915319A (en) * 1973-12-26 1975-10-28 Robert W Fairburn Rotatable aircraft storage apparatus
US3966192A (en) * 1969-05-03 1976-06-29 Heidelberger Druckmaschinen Aktiengesellschaft Sheet pile elevator in sheet delivery systems for printing machines
US4158524A (en) * 1978-02-23 1979-06-19 Serafin Joseph W Mobile chair lift
US4502570A (en) * 1981-04-22 1985-03-05 Linden-Alimak Ab Drive system for wire rope hoists
US5025512A (en) * 1986-08-26 1991-06-25 Masateru Niimura Flooring apparatus for pool or the like
US5152369A (en) * 1991-09-10 1992-10-06 Mori Nakaoka Apparatus and method for hoisting a platform adjacent a scaffolding
US5377787A (en) * 1992-10-13 1995-01-03 Chabrier; Philippe Vertically displaceable platform
US5596556A (en) * 1993-02-18 1997-01-21 Hewlett-Packard Company Linear displacement and support apparatus for use in a cartridge handling system
US6085683A (en) * 1998-09-01 2000-07-11 The United States Of America As Represented By The Secretary Of The Navy Underwater depolyable testing platform
US6102882A (en) * 1996-04-15 2000-08-15 Cobo; Bernabe Cobo Physiotherapy apparatus for the treatment of articular stiffness
US20050098387A1 (en) * 2003-09-08 2005-05-12 Penn Jay P. Platform lift apparatus for attic storage space
US20070114098A1 (en) * 2005-09-29 2007-05-24 Jason Hartley Attic lift system and method
US20100051888A1 (en) * 2008-08-28 2010-03-04 Taylor James E Self-Contained Self-Elevating Platform Lift
US20110113720A1 (en) * 2009-03-06 2011-05-19 Kone Corporation Method of installing an elevator
US20110186088A1 (en) * 2010-01-31 2011-08-04 Miller Kenneth C Substrate nest with drip remover
US20110315488A1 (en) * 2009-01-08 2011-12-29 Daifuku Co., Ltd. Vertically Moving Device
US20130126275A1 (en) * 2011-11-17 2013-05-23 Vijay Shilpiekandula Cabling Configuration for Railless Elevators
US9120645B2 (en) 2011-11-16 2015-09-01 Spacelift Products, Inc. Control system for a platform lift apparatus
CN106114766A (en) * 2016-08-19 2016-11-16 广船国际有限公司 A kind of cargo instrument of ro-ro passenger ship
US9572427B2 (en) * 2014-03-31 2017-02-21 LFK Engineering LLC Motorized home storage system
US20180065714A1 (en) * 2015-05-12 2018-03-08 Fredrik VON HELAND System for transporting objects to ocean structures
DE102016117287B4 (en) * 2016-03-14 2020-10-29 Karl Majer Lifting device for a transport platform

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972973A (en) * 1958-05-06 1961-02-28 Ernest L Thearle Offshore platform
US3300189A (en) * 1965-05-17 1967-01-24 Luther H Blount Control for trawler winches
US3318276A (en) * 1965-10-22 1967-05-09 Lykes Bros Steamship Co Ocean-going barge carrier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972973A (en) * 1958-05-06 1961-02-28 Ernest L Thearle Offshore platform
US3300189A (en) * 1965-05-17 1967-01-24 Luther H Blount Control for trawler winches
US3318276A (en) * 1965-10-22 1967-05-09 Lykes Bros Steamship Co Ocean-going barge carrier

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966192A (en) * 1969-05-03 1976-06-29 Heidelberger Druckmaschinen Aktiengesellschaft Sheet pile elevator in sheet delivery systems for printing machines
US3648858A (en) * 1970-05-07 1972-03-14 Byron Jackson Inc Stabilized load hoist apparatus
US3866718A (en) * 1971-06-14 1975-02-18 Mannesmann Leichtbau Ges Mit B Reeling of load and safety cables or ropes for cages suspended in front of buildings or the like
US3844418A (en) * 1973-11-29 1974-10-29 Case Co J I Telescoping jib assembly
US3915319A (en) * 1973-12-26 1975-10-28 Robert W Fairburn Rotatable aircraft storage apparatus
US4158524A (en) * 1978-02-23 1979-06-19 Serafin Joseph W Mobile chair lift
US4502570A (en) * 1981-04-22 1985-03-05 Linden-Alimak Ab Drive system for wire rope hoists
US5025512A (en) * 1986-08-26 1991-06-25 Masateru Niimura Flooring apparatus for pool or the like
US5152369A (en) * 1991-09-10 1992-10-06 Mori Nakaoka Apparatus and method for hoisting a platform adjacent a scaffolding
US5377787A (en) * 1992-10-13 1995-01-03 Chabrier; Philippe Vertically displaceable platform
US5596556A (en) * 1993-02-18 1997-01-21 Hewlett-Packard Company Linear displacement and support apparatus for use in a cartridge handling system
US6102882A (en) * 1996-04-15 2000-08-15 Cobo; Bernabe Cobo Physiotherapy apparatus for the treatment of articular stiffness
US6085683A (en) * 1998-09-01 2000-07-11 The United States Of America As Represented By The Secretary Of The Navy Underwater depolyable testing platform
US20080296089A1 (en) * 2003-09-08 2008-12-04 Penn Jay P Platform lift apparatus for attic storage space
US8292031B2 (en) 2003-09-08 2012-10-23 Spacelift Products Inc. Platform lift apparatus for attic storage space
US7416055B2 (en) * 2003-09-08 2008-08-26 Spacelift Products, Inc. Platform lift apparatus for attic storage space
US20050098387A1 (en) * 2003-09-08 2005-05-12 Penn Jay P. Platform lift apparatus for attic storage space
US7575098B2 (en) * 2005-09-29 2009-08-18 Jason Hartley Attic lift system and method
US20070114098A1 (en) * 2005-09-29 2007-05-24 Jason Hartley Attic lift system and method
US20100051888A1 (en) * 2008-08-28 2010-03-04 Taylor James E Self-Contained Self-Elevating Platform Lift
US7963505B2 (en) 2008-08-28 2011-06-21 Taylor James E Self-contained self-elevating platform lift
US9272844B2 (en) * 2009-01-08 2016-03-01 Daifuku Co., Ltd. Vertically moving device
US20110315488A1 (en) * 2009-01-08 2011-12-29 Daifuku Co., Ltd. Vertically Moving Device
US20110113720A1 (en) * 2009-03-06 2011-05-19 Kone Corporation Method of installing an elevator
US20120018252A1 (en) * 2009-03-06 2012-01-26 Kone Corporation Elevator arrangement and method
US8616340B2 (en) * 2009-03-06 2013-12-31 Kone Corporation Elevator arrangement and method
US8881872B2 (en) 2009-03-06 2014-11-11 Kone Corporation Method of installing an elevator
US20110186088A1 (en) * 2010-01-31 2011-08-04 Miller Kenneth C Substrate nest with drip remover
US9120645B2 (en) 2011-11-16 2015-09-01 Spacelift Products, Inc. Control system for a platform lift apparatus
US20130126275A1 (en) * 2011-11-17 2013-05-23 Vijay Shilpiekandula Cabling Configuration for Railless Elevators
US8978831B2 (en) * 2011-11-17 2015-03-17 Mitsubishi Electric Research Laboratories, Inc. Cabling configuration for railless elevators
US9572427B2 (en) * 2014-03-31 2017-02-21 LFK Engineering LLC Motorized home storage system
US20180065714A1 (en) * 2015-05-12 2018-03-08 Fredrik VON HELAND System for transporting objects to ocean structures
DE102016117287B4 (en) * 2016-03-14 2020-10-29 Karl Majer Lifting device for a transport platform
CN106114766A (en) * 2016-08-19 2016-11-16 广船国际有限公司 A kind of cargo instrument of ro-ro passenger ship

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Publication number Publication date
FR2020325A1 (en) 1970-07-10
DE1949493A1 (en) 1970-04-23
NL6915136A (en) 1970-04-14

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