Of Sectional Vertical Support From Boom Patents (Class 212/176)
  • Patent number: 11725630
    Abstract: Provided is an eco-friendly wind power generation apparatus that can perform power generation using wind by providing the blades of a wind power generator on a jib of a tower crane, and can perform wind power generation at the optimum altitude and in the optimum direction by automatically or manually performing the lifting or lowering and swing operation of a jib even when wind speed is insufficient because wind is not blowing, or perform wind power generation using artificial wind power generated by the operation of the jib, thereby generating a lot of electricity in necessary places and supply the electricity to all industrial sectors regardless of location and environment.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: August 15, 2023
    Inventor: Ji Su Lee
  • Patent number: 11629033
    Abstract: Disclosed are an integral lifting system and lifting method for assembled members. The integral lifting system includes fixing mechanisms and more than four vertical stand columns. The four vertical stand columns are located at four corners of a building, the building is located in a region encircled by the vertical stand columns, a transverse rail beam is disposed between every two vertical stand columns, one end of the transverse rail beam is mounted at the top of one vertical stand column, and the other end is mounted on the top of the other stand column. The transverse rail beam is provided with an operation trolley, a jib crane is disposed on an upper surface of the operation trolley, and a lifting mechanical arm is disposed on an outer side surface of the operation trolley. A hydraulic jacking mechanism is disposed at the bottoms of the vertical stand columns.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: April 18, 2023
    Assignee: Southeast University
    Inventors: Hui Jin, Haihan Jiao, Zhaozhong Li, Guansi Liu, Libin Wang
  • Patent number: 10994441
    Abstract: A method for installing and deploying concealed mounting points for a davit or jib crane on a roof patio or large balcony covered with stone pavers. Specifically, a metal plate assembly lower flange is affixed to the concrete roof slab with its contact points covered by waterproofing membrane. The metal assembly hard point upper flange holes correspond to the holes in the mounting base of the davit or jib crane. The metal assembly when installed is lower than the pavers supported by metal pedestal transition components. As such, the metal assembly hard point is concealed and covered by a removable cover plate that also sits on top of the metal pedestal transition components and is flush with the top of the pavers.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: May 4, 2021
    Inventor: Patrick M. Tarrant
  • Patent number: 10876577
    Abstract: A slew bearing including a stationary bearing ring to be fixed to a base, and a moveable bearing ring which is to be fixed to a moveable object and which is concentric with the stationary bearing ring, the stationary bearing ring and moveable bearing ring being configured to enable rotation of the moveable bearing ring relative to the stationary bearing ring, wherein the moveable bearing ring comprises a top ring member, a bottom ring member, and a middle ring member in between the top and bottom ring member, the top, middle and bottom ring members each being formed by a plurality of ring segments wherein vertical joints between ring segments of adjacent ring members are not aligned to each other, wherein the top, middle and bottom ring member comprise a plurality of holes distributed about the circumference of the moveable ring, respectively, wherein the top, middle and bottom ring member are connected to each other by a plurality of bolts received in the corresponding holes of the moveable ring member, and
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: December 29, 2020
    Assignee: ITREC B.V.
    Inventors: Teunis Van Der Hoek, Joop Roodenburg, Johannes René Eshuis
  • Patent number: 10815687
    Abstract: The present invention relates to a wind turbine assembly system which proposes an alternative to conventional cranes, having a main lifting structure configured to withstand the load of at least one tower section or at least one wind turbine component, and at least one secondary lifting structure configured to perform the lifting of the main lifting structure with respect to the wind turbine tower, in addition relating to a wind turbine assembly method according to the previous system, as well as the wind turbine assembled with the previous method.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: October 27, 2020
    Assignee: ACCIONA WINDPOWER, S.A.
    Inventors: Luis Carrillo Alonso, Manuel Biedma Garcia, Iván García Maestre, Ander Gastón Lujambio, Teresa Arlabán Gabeiras, Jose Miguel García Sayés, Miguel Núñez Polo
  • Patent number: 10662034
    Abstract: The invention relates to a climbing system (1) for a crane. The system comprises a climbing apparatus (2) for inserting a mast section (3) or for removing a mast section (3) from a tower structure (4) of a crane, and a control unit (5) for controlling the climbing apparatus (2). The system is furthermore characterized in that the system comprises a first sensor (51) for monitoring a state of a connection means of the climbing apparatus (2) and/or the tower structure (4), wherein the first sensor (51) is connected to the control unit (5). A climbing process of a crane can thus be simplified and the safety of the climbing process can be increased.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: May 26, 2020
    Assignee: Liebherr-Werk Biberach GmbH
    Inventors: Markus Hofmeister, Andreas Hussong
  • Patent number: 10273122
    Abstract: The present invention relates to a climbing device for a revolving tower crane having a climbing frame movable along, the crane tower for climbing in and/or climbing down tower sections, wherein a guide is provided for the longitudinally movable support of the climbing frame with respect to the crane tower. In accordance with the invention, the guide has resiliently flexibly supported and/or resiliently flexible transverse support elements transversely to the travel direction of the climbing frame.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: April 30, 2019
    Assignee: Liebherr-Werk Biberach GmbH
    Inventors: Alfred Hess, Willi Ackermann
  • Patent number: 10227790
    Abstract: A method for installing tower fittings by introducing at least two separate supply modules into a wind turbine tower, wherein a separate supply module structurally includes one segment each of at least two system components of the wind turbine tower, and wherein an upper segment end is arranged on an upper edge, and a lower segment end on a lower edge, of the supply module, including: arranging the upper edge of a first separate supply module at an upper end of the wind turbine tower; connecting an upper segment end of the first separate supply module to a lower segment end of a corresponding system component of a second separate supply module; and arranging the upper edge of the second separate supply module at the upper end of the wind turbine tower.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: March 12, 2019
    Assignee: Senvion GmbH
    Inventor: Olaf Samuelsen
  • Patent number: 9764932
    Abstract: A jacking tower installation system comprises a jacking tower having at least two forward and at least two rear legs, wherein each of the legs is supported on one of a plurality of support stands attached to and horizontally offset from the leg, the legs including dollies which enable horizontal movement of the jacking tower and lifts capable of raising and lowering the jacking tower clear of the sill beams of a cargo container crane, such that the legs of the jacking tower can be lifted and positioned over and lowered onto the sill beams.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: September 19, 2017
    Assignee: Paceco Corp.
    Inventors: Sun Huang, Sai Kit Cheung, Philip Tam, Kok Leong Wun, Nathaniel John Newsom
  • Patent number: 9689266
    Abstract: A production facility for forming elongated products, in particular wind turbine blades, includes elongated mould assemblies that may be accessed on the basis of an appropriate transport system which includes at least one support member laterally positioned between the elongated mould assemblies. The support member is positioned so as to enable a rotational movement of an arm or is configured to change position or includes a rotatable carrier element. The support member may be positioned in a non-interference position, in which one or both mould assemblies can be moved into a position so as to form a composite mould assembly.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: June 27, 2017
    Assignee: Vestas Wind Systems A/S
    Inventors: Anton Bech, Raul Garcia Tapia, Aksel Petersen
  • Patent number: 9403665
    Abstract: The present invention relates to a tower crane with a tower of at least one tower element, in particular lattice piece, and a structural guying with at least one guy rod for the horizontal anchorage of the tower at a structure, wherein the at least one guy rod of the structural guying is attached or attachable to an attachment point of the tower element.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: August 2, 2016
    Assignee: Liebherr-Werk Biberach GmbH
    Inventor: Thomas Herse
  • Patent number: 9366456
    Abstract: A concentrated solar tower assembly includes a hollow tower structure defining lower and upper portions. The lower portion includes a closable opening region for configuring a closable opening, and the upper portion includes a top gird having inner and outer top grids. The assembly further includes a solar receiver steam generator entirely installed at the ground level G on the inner top grid simultaneous to erection of the tower. The generator on the inner top grid is slidingly directed within the tower from the closable opening to be entirely accommodated therewithin. Thereafter, the generator on the inner top grid is lifted for being placed along the upper portion of the tower.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: June 14, 2016
    Assignee: ALSTOM Technology Ltd.
    Inventors: Paolo Montresor, Michael Sack, Markus Friess
  • Publication number: 20150014266
    Abstract: The present disclosure relates to a mobile revolving tower crane with a crane tower consisting of individual lattice pieces and with a main arm that is articulated in a rockable manner to the tower via a rocking mechanism, or with a rockable tip, wherein the crane tower comprises a climbing device.
    Type: Application
    Filed: July 7, 2014
    Publication date: January 15, 2015
    Inventors: Mikica Rafailovic, Joachim Henkel, Helga Tolksdorf
  • Publication number: 20140332486
    Abstract: A jacking tower installation system comprises a jacking tower having at least two forward and at least two rear legs, wherein each of the legs is supported on one of a plurality of support stands attached to and horizontally offset from the leg, the legs including dollies which enable horizontal movement of the jacking tower and lifts capable of raising and lowering the jacking tower clear of the sill beams of a cargo container crane, such that the legs of the jacking tower can be lifted and positioned over and lowered onto the sill beams.
    Type: Application
    Filed: May 12, 2014
    Publication date: November 13, 2014
    Inventors: Sun Huang, Sai Kit Cheung, Philip Tam, Kok Leong Wun, Nathaniel John Newsom
  • Patent number: 8875911
    Abstract: Systems and methods for rig assembly and for erecting a mast of a rig and such systems with roller apparatus to facilitate movement of a mast section from a mover. In a first embodiment, the method includes erecting a rig mast section on a substructure, the substructure including a first substructure box spaced-apart from a second substructure box, the first substructure box comprising a first upper box above a first lower box and the second substructure box comprising a second upper box above a second lower box.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: November 4, 2014
    Assignee: National Oilwell Varco, L.P.
    Inventors: Robert B. Donnally, Chunqiao Ren, Xi Lin Liu, Yan Yu, Peng Yue, Wei Wang
  • Patent number: 8684136
    Abstract: Embodiments of the disclosure provide a fall arrest system. The fall arrest system may include a post disposed on a clamp. The clamp may be configured to secure to a base structure. The fall arrest system may also include a davit arm disposed on the post via one or more hinges. The post may be configured to support a winch and the davit arm may be configured to support a cable therefrom.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: April 1, 2014
    Assignee: National Trench Safety, LLC
    Inventor: Ronald W. Chilton
  • Patent number: 8449242
    Abstract: An industrial robot may include an arm unit equipped with a hand structured to place a workpiece on the hand, a column structured to support the arm unit so as to enable the arm unit to move in a vertical direction, a hinge provided at an intermediate position in the vertical direction structured to section and fold the column into a base column and an upper column, supporting members placed on each of the base column and the upper column, screw support members placed on each of the supporting members, a screw shaft that is screwed into the screw support members, a base column side and an upper column side of the screw shaft being threaded reversely to each other, and a screw shaft turning means for turning the screw shaft. The industrial robot carries out transfer work of the workpiece at a predetermined working space.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: May 28, 2013
    Assignee: Nidec Sankyo Corporation
    Inventors: Takayuki Yazawa, Akiko Yamada
  • Patent number: 8366373
    Abstract: A fully collapsible lightweight mount to support a cargo loading apparatus. The mount has releasably attached horizontal and vertical arms, with a bracket to adjustably attach a cargo loading device on the vertical arm. In one embodiment, the horizontal arms have brackets configured to attach to “stake holes” in the standard side walls of a pickup truck cargo bed. The vertical arm of the device may be further supported against for example, a cargo bed forward wall or floor by a floor brace. Alternatively horizontal arm may attach to a pickup truck trailer hitch by additional mounts and connecting arm components suitable for attachment to a class 3 trailer hitch. The component parts can be readily assembled and disassembled, are lightweight, and occupy little space. The disassembled device can be stored in a carrying bag in the cab or other compartment of a vehicle.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: February 5, 2013
    Inventor: Steven Wood
  • Patent number: 8011098
    Abstract: A wind tower erection device and method for erecting wind turbine towers which avoid the need for using expensive cranes. The device and method employs a stacker unit for anchoring to the wind turbine foundation, a plurality of intermediate modules, and a mechanical actuator for raising the intermediate modules vertically. The stacker unit has a receptacle allowing for lateral sliding of intermediate modules inside of the stacker unit. In one embodiment, the stacker unit has a receptacle for lateral sliding of intermediate modules inside of the stacker unit. The stacker unit and the intermediate modules each have at least one open side to for positioning of tower sections within the stacker unit and stacked intermediate modules. A bridge crane section is initially placed on top of the stacked intermediate modules.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: September 6, 2011
    Inventors: Roger W. Vorhies, Jerard B. Hoage
  • Patent number: 7748193
    Abstract: A support system is provided for supportably securing a vertically movable support structure having a boom attached thereto to a floor structure of a building. The support structure extends through an opening formed in the floor structure. The support system includes a set of support brackets pivotably mounted relative to vertical support members of the support structure. The support brackets are supportably engageable with a portion of the support structure and a first floor structure in a first supporting position. The support brackets are freely swingable and movably engageable with a second floor structure as the support structure is moved relative to the second floor structure enabling the support brackets to be supportably engageable with the portion of the support structure and the second floor structure in a second supporting position.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: July 6, 2010
    Assignee: Putzmeister America, Inc.
    Inventors: Walter N. Knigge, C. William Carbeau
  • Publication number: 20090107945
    Abstract: The invention concerns a collapsible boom, such as a crane jib, concrete pump, camera support, searchlight mast and similar narrow far-projecting structures with several elements (10, 20, 30 . . . ), tiltable around parallel axes, which can be tilted around the axis by actuators (15, 13, 25, 23, . . . ) and fixed in at least one position. The invention is characterized by the fact that the individual elements (10, 20, 30 . . . ) of the boom are hinged to each other via intermediate pieces (50, 60, 70) and the actuators (15, 13, 25, 23, . . . ) engage on one end on an intermediate piece and on the other end on its adjacent element.
    Type: Application
    Filed: July 11, 2006
    Publication date: April 30, 2009
    Inventor: Franz Ehrenleitner
  • Patent number: 7086820
    Abstract: A portable lifting apparatus having an adjustable length vertical section with three legs thereon to engage the ground. A concave saddle is affixed to the upper end and an adjustable combination of lifting member and handle are removably attached thereto. The end of the lifting member is coupled to the object to be lifted and moved.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: August 8, 2006
    Inventor: Daniel T. Blake
  • Patent number: 7004337
    Abstract: The cab/pivot unit comprises an upper mast element associated with a pivot, an access platform which extends horizontally at one side of the mast element, and a driver's cab mounted pivotably about a vertical axis located at the side of the mast element and linked to this element. The cab is orientable manually (arrows F1, F2) through approximately 90° between an operating position, in which it is located in the extension of the access platform, in front of the mast element, and a transport position, in which this cab is folded above the platform, against the mast element. The invention is used for tower cranes with a “suspended” cab.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: February 28, 2006
    Assignee: Potain
    Inventor: Michel Lissandre
  • Patent number: 6668497
    Abstract: A support structure for supporting a concrete placing boom above a work site. The support structure includes a support mast having a generally smooth outer surface. The support mast receives an adapter that can be removed from one support mast and attached to another. The adapter includes a mast receiving portion having a pressure coupling for holding the adapter in contact with the outer surface of the mast. The adapter further includes a boom attachment portion that allows the pedestal of the concrete placing boom to be securely attached to the adapter. The adapter includes a central guide pin that is received within a guide opening formed in a top plate of the support mast. The interaction between the guide pin and the central opening on the mast aids in guiding the adapter onto the mast.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: December 30, 2003
    Assignee: Putzmeister Inc.
    Inventors: Martin G. Mayer, Rodney D. Wurgler
  • Publication number: 20020053550
    Abstract: A hoisting device for big loads, comprising at least one hoisting mast, a foot arranged on the underside and hoisting means connected at least to the top, wherein the hoisting device is assembled from mast parts which are mutually connectable by means of connecting means and the largest of which has dimensions which do not exceed those of a usual container, and wherein each mast part is constructed as a framework structure consisting of angle bars and cross bars mutually connecting the angle bars, wherein the angle bars consist of two parts with a set-square-shaped cross section of different dimensions and wherein the outer ends of the legs of the smaller lie against the legs of the larger and the larger part lies on the outer periphery of the mast part, so that mast parts are provided of the greatest possible strength and stiffness within the dimensions of typical containers.
    Type: Application
    Filed: February 3, 2000
    Publication date: May 9, 2002
    Inventor: PIETER MARIA STOOF
  • Patent number: 6189866
    Abstract: A load handling assembly that is attachable to the receiver of a receiver hitch assembly of the pickup truck. The load handling assembly includes a winch assembly in connection with a rotatable support structure to allow heavy loads to be lifted to the level of the pickup truck bed and then rotated into position over the pickup truck bed prior to lowering. To accommodate users stationed on the ground or on the bed of the pickup truck, the rotatable support structure is provided with two separate winch mounting brackets so that the winch could be safely mounted to accommodate operation from the desired location.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: February 20, 2001
    Inventors: Raymond Harkins, M. Danny Harrison
  • Patent number: 6021910
    Abstract: A platform assembly designed for use in supporting a crane during the construction of a multi-story building is described. The assembly includes a platform for supporting a crane and means for fixedly attaching the platform to differing locations along the length of a structural column of such building during construction of the latter.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: February 8, 2000
    Inventor: James W. Franklin
  • Patent number: 5934490
    Abstract: A combination engine hoist and stand for lifting and supporting an engine includes a variably oriented "H" shaped multi hinged base with frame extension capability mounted on casters and a combined hoist and stand vertical column located on the base for communicating with and supporting both a hoist and a stand via a collar disposed therebetween. The hoist includes a boom and a hoist column, the boom pivotally attached to the hoist column and the hoist column attached to the stand column via the collar. The boom is manually adjustable for length via extension elements and the boom height is adjustable by activating a hydraulic jack. A wire rope depends from the outward extending end of the boom and is manually adjustable for length by operating a winch. The boom alone or the entire hoist is removable from the stand as desired. The stand includes a stand column and a shaft that pivotally and slidably communicates with the collar on the stand column and also includes a plate for attachment to an engine.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: August 10, 1999
    Inventor: Arthur R. Mora
  • Patent number: 5199586
    Abstract: A quick-connect system is disclosed for sectional boom members for cranes and the like. The sectional boom members comprise chords for carrying compressive loads, each chord terminating in an end configured to abut against an end of a chord of an adjacent sectional boom member. The quick-connect system comprises at least one easily alignable connector secured to the ends of at least one of the chords, the connector comprising a compressive load bearing surface intersected by the intersection of the vertical and horizontal neutral axes of the chord to which the connector is attached.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: April 6, 1993
    Assignee: The Manitowoc Company, Inc.
    Inventors: David J. Pech, Wayne W. Beebe, Terry Casavant, John Lanning, Paul M. Pukita, Michael J. Wanek
  • Patent number: 5137161
    Abstract: A boom support assembly for an earth working machine, which includes a winch, a pair of tension members and a pendant pin link interposed between tension members. The first tension member is a boom support pendant secured to a boom point of a boom and the first end of the pendant pin link. The second tension member is a boom raising rope which is received over a plurality of gantry sheaves mounted on the top portion of a gantry structure and attached to the winch at one end and attached to the second end of the pendant pin link. The gantry sheaves are mounted on an alignment apparatus that has a sheave shaft mounted in an eccentric bore of a pair of cartridges rotatable in the top portion of the gantry structure. This alignment apparatus insures the proper positioning of a through bore of the pendant pin link between support openings in the top portion of the gantry.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: August 11, 1992
    Assignee: Dresser Industries, Inc.
    Inventor: Vance D. Dutton
  • Patent number: 4953720
    Abstract: A crane comprises a base, a driving body for driving and controlling the crane disposed on the base rotatable in a horizontal plane, an articulated arm attached to the driving body pivotable in a vertical plane, and a clutching means for clutching the construction elements. The arm is folded and extended in a vertical plane. The clutching means is tiltably and detachably connected to a forward end of the arm. The crane further comprises a fixing means tiltably and detachably connected to the forward end of the arm as a substitute for the clutching means. The fixing means is capable of being fixed to the construction, so that the driving body can be moved while the fixing means is fixed to the construction.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: September 4, 1990
    Assignee: Shimizu Construction Co., Ltd.
    Inventors: Tadashi Okano, Tadayoshi Honda
  • Patent number: 4856662
    Abstract: A method of installing a boom on the top of a high vertical tower comprising vertically positioning a first tower section and securing the tower section to a base; installing a plurality of additional tower sections in consecutive order on top of the first tower section and securing the adjoining sections together until a tower is erected having a desired height; a boom having a base section, at least one extendable section and a load lifting end; releasably attaching the boom in vertical position to and along side the tower as it is erected with the boom load lifting end at the bottom; jumping the boom vertically upwardly by alternately extending and retracting various boom sections as the tower sections are installed; positioning the boom base end adjacent the boom turret, tilting the boom turret into close contact with the boom base end and joining the turret to the boom base end by a horizontal boom footpin; releasing the boom lifting end from the tower; tilting the turret into contact with the adapter up
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: August 15, 1989
    Assignee: CBI Research Corporation
    Inventors: Jack C. Marvin, Benjamin G. Shepherd
  • Patent number: 4826023
    Abstract: A crane or derrick for use on an offshore platform comprising a base, a boom operatively connected to the base, and a sectioned kingpole secured to said base, the kingpole including a first kingpole section secured to the base and at least one additional kingpole section removably secured to the first kingpole section. The sectioned kingpole permits the installation of a crane having a tall kingpole and thereby greater lifting capacity such that equipment necessary to carry out operations such as the driving of conductor pipe and piling can be erected on the deck of the platform without the necessity for utilizing a derrick barge.
    Type: Grant
    Filed: July 10, 1985
    Date of Patent: May 2, 1989
    Inventor: Leon D. Ortemond
  • Patent number: 4463858
    Abstract: A portable hoist that can be mounted in a pick up truck for lifting objects and for the lifting and towing of disabled vehicles. The hoist can be used either in or out of the truck.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: August 7, 1984
    Inventor: Michael Bilas
  • Patent number: 4387812
    Abstract: A skyline intermediate support for use in cable logging systems and a logging carriage are shown and described. The intermediate skyline support permits the skyline cable to pass freely through the intermediate support while positively retaining the cable on the support, and allows the logging carriage to pass over the top of the intermediate support, with freedom to allow for a rocking motion in the carriage.
    Type: Grant
    Filed: March 10, 1981
    Date of Patent: June 14, 1983
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Cleveland J. Biller, David D. Johnson
  • Patent number: 4274542
    Abstract: A method of transferring a crane from a tower to an adjacent elevated site, such as a building under construction. The crane is raised from the tower by an elevating frame secured at one end to the tower. A transition section is inserted between the crane and the top of the tower. A bogie with an open end on the site straddles the elevating frame and receives cross beams on each end. The crane and transition section are raised, and the bogie is centered with respect to the tower. The cross beams are positioned under the ends of the transition section to which they are then bolted. The elevating frame is lowered to transfer the full weight of the crane to the transition section, and to the bogie, which can then be moved horizontally on the site away from the tower.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: June 23, 1981
    Assignee: FMC Corporation
    Inventor: John H. Barclay