Class / Patent application number | Description | Number of patent applications / Date published |
212195000 | HAVING COUNTERWEIGHT OR COUNTERBALANCING MEANS | 31 |
20090159548 | OVERHEAD CRANE - An overhead crane adapted to be supported by at least one main support beam includes a bridge adapted to travel in a substantially horizontal direction along the at least one main support beam, a trolley adapted to travel in a substantially horizontal direction along the bridge, a jib rotatably coupled to a bottom surface of the trolley, and a hoist adapted to travel in a substantially horizontal direction along the jib. | 06-25-2009 |
20100193457 | ARTICULATED JIB - An articulated jib for moving a load is supported on a base and comprises a first jib arm pivotably connected to a base. The first jib arm functions as a bascule and is pivotable about a first axis. There is a first counterweight disposed on the first jib arm. A second jib arm is pivotably connected to the first jib arm and is pivotable about a second axis. A linking rod connects the second jib arm to a lever arm which is also pivotably connected to the base. There is a second counterweight disposed on the lever arm. | 08-05-2010 |
20100264105 | Ring Derrick with Stationary Counterweight - A ring derrick includes a carriage which moves on a fixed circular track around a stationary counterweight. A tension and compression column assembled from transportable tubular segments is affixed to the counterweight by a universal swivel joint. The back mast of the derrick is secured at its upper end to the tension column, while the main boom of the derrick extends radially away from the tension column. The main boom and back mast are hinged directly together at the carriage by massive hinge pins which pass through spherical bearings mounted on the carriage. The carriage's suspension distributes the load from the boom and mast to an array of trucks and has an automatic stabilizing system that compensates for uneven track. | 10-21-2010 |
20100307999 | PORTAL RE-POSITIONING DEVICE FOR LARGE-AREA GLASS PLATES - The invention relates to a method and device for changing the position of large-area glass plates which are stationary or moving, having the following features: one or more devices located on a level plane, each having a plurality of suction devices ( | 12-09-2010 |
20140144860 | TELESCOPIC TOWER CRANE SYSTEM - A telescopic tower crane system has several tower layers of different outer diameters. Tower layers of smaller outer diameters are put inside the tower layers of larger outer diameters. Each of the tower layers consists of upstanding tower masts and crossbars connecting in between. The lower end of each of the tower masts has a lifting mechanism. Hoists are combined with the lifting mechanisms to lift the tower layers upward one by one from inside outward. The positioning mechanism at the lower end of each of the tower masts is positioned to the upper end of the adjacent tower mast. The crane tower is thus lifted to an extreme height and can lift heavy or long objects. | 05-29-2014 |
20140175038 | WIND TURBINE ASSEMBLY SYSTEM - The wind turbine assembly system of the present invention comprises a lifting structure comprising at least first structural support elements configured to transmit stresses to the wind turbine tower during the hoisting of a wind turbine component and a crane configured to displace the wind turbine component towards the tower axis, the system further comprising a displaceable climbing element with respect to the lifting structure by means of guiding mechanisms, the displaceable climbing element incorporating second structural support elements dimensioned to at least partly support the weight of the lifting structure, where the first structural support elements are displaceable so that their relative position can vary with respect to the lifting structure. | 06-26-2014 |
20140299563 | COUNTERWEIGHT FIXING DEVICE - Counterweight fixing device ( | 10-09-2014 |
212196000 | Counterweight movable relative to load support | 24 |
20080264886 | Telescopic Camera Crane - A telescopic crane for supporting a camera or the like comprising a telescopic support, with at least one arm ( | 10-30-2008 |
20090134106 | LIFTING DEVICE - A lifting device having a frame, a lifting member supported by the frame, and a hydraulic pump and motor supported to the frame. The hydraulic pump and motor are operatively connected to the lifting member to raise, lower, extend, and retract the lifting member. | 05-28-2009 |
20090272708 | Modular Counterweight Carriage for Cranes, in Particular for Large Crane - A large mobile crane includes a revolving superstructure, a main boom hinged to the superstructure, and a derrick boom hinged to the superstructure. A modular counterweight system includes a traveling counterweight and a non-traveling counterweight connected to a crossbeam suspended from the distal end of the derrick boom so that the non-traveling counterweight is activated before the traveling counterweight. | 11-05-2009 |
20100000954 | PIPE-LAYING MACHINE - A pipe-laying machine includes a self-propelled tracked vehicle, on one side of which is fitted a crane designed for lifting and laying pipes. The machine is also fitted with a counterweight constituted by a plate made of a heavy material that moves between a rest position in which it retracts fully into the vehicle and an operational position in which it projects from the vehicle on the opposite side to the crane. In the machine according to the invention, engine unit and control cab are located at each end of chassis, projecting slightly from it, to leave a free space in the central part of the vehicle for the installation of all the mechanisms designed for the movement and control of the crane. | 01-07-2010 |
20100072156 | Boom Hoist Transportation System and Crane Using Same - A mobile lift crane includes a carbody having moveable ground engaging members; a rotating bed rotatably connected to the carbody such that the rotating bed can swing with respect to the ground engaging members; a boom pivotally mounted on the rotating bed; a load hoist line trained over a pulley on the boom and wound on a load hoist drum connected to the rotating bed; and a boom hoist drum mounted in a frame. The boom hoist drum frame is connected to the rotating bed and a boom hoist line is wound on the boom hoist drum and connected to an upper equalizer and a lower equalizer, with the upper equalizer connected to the top of the boom by fixed length pendants, such that rotation of the boom hoist drum changes the amount of boom hoist line between the lower equalizer and the upper equalizer, thereby changing the angle between the rotating bed and the boom. The boom hoist drum frame, the lower equalizer and the upper equalizer each include cooperating attachment structures whereby the lower and upper equalizers can be detachably connected to the frame so that the boom hoist drum, the lower equalizer, the upper equalizer and the boom hoist line can be transported between job sites as a combined assembly. | 03-25-2010 |
20100116766 | MOBILE LIFT CRANE WITH LIFT ENHANCING ATTACHMENT - A mobile lift crane includes a central crane unit, a boom unit and a counterweight unit. The central crane unit has a carbody, moveable ground engaging members and a rotating bed mounted to the ground engaging members with a rotatable connection such that the rotating bed can swing with respect to the ground engaging members. The boom unit has a support member, at least one moveable ground engaging member, and a boom pivotally mounted on the support member. The counterweight unit has counterweight on a support member. Rigging connects the boom and counterweight unit such that a load lifted by the boom can be counterbalanced by the counterweight. The boom unit and counterweight unit are connected to the central crane unit by structural members that carry compressive loads and maintain the boom unit, the rotating bed and the counterweight unit in lateral alignment with each other, but allow relative vertical movement between the boom unit, the rotating bed and the counterweight unit. A main mast is pivotally mounted on the combination of the central crane unit, the boom unit and the structural member between the central crane unit and the boom unit. In another embodiment, a counterweight unit with a swing axis and boom unit are connected directly together with a structural member. Ground engaging members on the boom unit can be rotated relative to a boom unit support member such that the boom unit i) can travel in an arc around the swing axis of the counterweight unit and ii) travel in direction in line with the structural member. | 05-13-2010 |
20110031203 | HYDRAULIC SHUTOFF CONTROL VALVE SYSTEM FOR A CAMERA CRANE - A telescopically extendible camera crane arm includes a second section telescopically movable within a first section. A first actuator extends the second section and a second actuator retracts the second section. A control valve has first and second ports connected to provide pressurized fluid to the first and second actuators. An inlet port of the control valve is connected to a pressurized fluid source, such as a pump or accumulator of a hydraulic system. The control valve has extend, off, and retract positions. The control valve provides a threshold amount of fluid pressure to the first and second actuators when in the off position, and provides a greater than the threshold amount of fluid pressure to the first and second actuators, when in the extend or retract positions. A stop valve may be connected to an outlet port of the control valve, with the stop valve having an open position wherein fluid can flow freely out of the outlet port, and a closed position wherein the stop valve stops fluid flow out of the outlet port. The threshold amount of fluid pressure maintains the cables and/or other linkages of the arm under tension or compression. This places the stationery arm in a balanced equilibrium which provides for very sensitive and rapid control of arm movements. | 02-10-2011 |
20110155681 | Counterweight Suspension Device and Mobile Crane - A counterweight suspension device includes: a pair of suspension cylinders that suspends a counterweight, and that are hung from a first and a second hanging points provided separately in a left and right direction at a top end of a rear mast; a coupling member that couples cylinder rod ends of the pair of suspension cylinders with each other; a lifting member for lifting the counterweight, that connects a first and a second connection points of the counterweight with each of the cylinder rod ends of the pair of suspension cylinders, with the first and the second connection points provided separately in the left and right direction on the counterweight for attaching the lifting member to the counterweight; a first communication circuit through which rod chambers of the pair of suspension cylinders communicate with each other; and a second communication circuit through which bottom chambers of the pair of suspension cylinders communicate with each other. | 06-30-2011 |
20110192815 | MOBILE CRANE HAVING COUNTERWEIGHT - Provided is a mobile crane capable of adjusting a counterweight height with no use of a costly hydraulic cylinder. The mobile crane comprises a lower propelling body, a upper slewing body, a boom pivotably attached to the upper slewing body, a mast which is at the rear of the boom and adapted to be raised and lowered so as to raise and lower the boom, a counterweight which is at the rear of the upper slewing body and hung from the mast through a guy line, and a counterweight-lifting cylinder attached to the counterweight so as to be extended to vertically push up the counterweight with respect to a ground surface. The counterweight-lifting cylinder has a cylinder body, a piston partitioning an internal space of the cylinder body into an upper head-side cylinder chamber and a lower rod-side cylinder chamber, and a rod extending from the piston downwardly beyond an lower end of the cylinder body. the counterweight-lifting cylinder is extended by supply of a hydraulic pressure into the head-side cylinder chamber and retracted by supply of a hydraulic pressure into the rod-side cylinder chamber. | 08-11-2011 |
20110247992 | MOBILE LIFT CRANE WITH VARIABLE POSITION COUNTERWEIGHT - A mobile lift crane includes a carbody; a rotating bed; a boom; a moveable counterweight unit; at least one linear actuation device; and at least one arm pivotally connected at a first end to the rotating bed and at a second end to the linear actuation device. The arm and linear actuation device are connected between the rotating bed and the counterweight unit such that extension and retraction of the linear actuation device changes the position of the counterweight unit compared to the rotating bed. In one method of operation, the counterweight is never supported by the ground during crane pick, move and set operations other than indirectly by the ground engaging members on the carbody. The linear actuation device can include at least one rack and pinion assembly or hydraulic cylinder. In another embodiment, the crane comprises a counterweight movement structure including a rack and pinion assembly having housing and a rack, the rack having a rectangular cross section with first and second sides opposite one another and third and fourth sides opposite one another, and having teeth on the first side and second sides, and at least first and third pinion gears engaged with the teeth on the first side of the rack and second and fourth pinion gears engaged with the teeth on the second side of the rack, and wherein each pinion gear is driven by a separate hydraulic motor, and wherein the motor driving the first pinion gear is mounted on the housing adjacent an opposite side of the rack from the motor driving the third pinion gear, and wherein the motor driving the second pinion gear is mounted on the housing adjacent an opposite side of the rack from the motor driving the fourth pinion gear. In another embodiment the crane includes a counterweight support structure attached to the counterweight unit. The counterweight support structure includes at least two ground engaging members that can provide support to the counterweight in the event of a sudden release of the load. The support structure comprises a telescoping structure connected to and between the ground engaging members such that the distance between the ground engaging members can be adjusted between a first and second position. | 10-13-2011 |
20130020273 | STEPLESS LUFFING MECHANISM FOR SUPER-LIFTING COUNTERWEIGHT OF CRAWLER CRANE AND OPERATING METHOD THEREOF - A stepless luffing mechanism for the super-lifting counterweight of a crawler crane, and an operating method thereof. The luffing mechanism includes a main luffing mast, a lifting oil cylinder, a luffing structure and a pulling board for the counterweight, and a super-lifting mast. The cylinder's lower end is connected with the counterweight, and its upper end is connected with a lower end of a front part of the luffing structure. The upper end of the luffing structure's front part is connected with the pulling board's lower end. A lifting rope connects the pulling board's upper end with the super-lifting mast's upper end. The super-lifting mast's lower end is connected with a platform's back end. An angle measuring sensor for the main luffing mast is provided on the super-lifting mast. A lower end of a back part of the luffing structure is connected with a pin shaft of the platform. | 01-24-2013 |
20130112641 | GRAVITY POWERED BALANCING SYSTEM - A balance assist system includes a support structure, an assist device, a variable balancing system, and a balancing cable. The variable balancing system is configured for moving a mass in a vertical direction along a Z axis. The variable balancing system includes a balance platform, a lever, and a mobile counterweight. The lever is pivotally attached to the balance platform at a fixed pivot point such that the lever is pivotable at the fixed pivot point about a balance axis. The mobile counterweight is movably disposed on the lever relative to the fixed balance axis and movable between a minimum position and a maximum position. The minimum position corresponds to the mass having a minimum weight such that the mass is statically balanced along the Z axis. Likewise, the maximum position corresponds to the mass having a maximum weight such that the mass is statically balanced along the Z axis. | 05-09-2013 |
20130140258 | BALLAST WAGON FOR A DERRICK CRANE - The present disclosure relates to a ballast wagon for a derrick crane. The ballast wagon has two wheeled portions which each have at least two wheelsets with a respective one wheel. The two wheeled portions are arranged rotatably at a frame of the ballast wagon. The at least two wheelsets of a wheeled portion are formed pivotable independently of one another about a respective pivot axis. | 06-06-2013 |
20130153525 | Mobile Lift Crane with Variable Position Counterweight - A mobile lift crane includes a carbody; a rotating bed; a boom; and a moveable counterweight unit. The crane is configured such that the counterweight unit is never supported by the ground other than indirectly by moveable ground engaging members on the carbody throughout a pick, move and set operation. In a first aspect, the crane is operable to move the counterweight unit to at least a first position in front of a fixed rearmost portion of the rotating bed and a second position behind the fixed rearmost portion of the rotating bed. In a second aspect, the crane also includes a first linear actuation device operable to move the counterweight unit toward and away from the front portion of the rotating bed by extending and retracting the linear actuation device. The counterweight unit may be moved a greater distance than a stroke of the first linear actuation device. | 06-20-2013 |
20130270209 | VEHICLE CRANE WITH DECOUPLABLE COUNTERWEIGHT ASSEMBLY - A vehicle crane includes a carbody, a turntable rotatably mounted on the carbody, a jib mounted on the turntable that can be tilted about a horizontal axis, and a counterweight assembly mounted on the turntable and can be moved relative to the turntable. A coupler mechanically couples the position of the counterweight assembly to the tilt angle of the jib. The coupler is embodied such that it can be decoupled. | 10-17-2013 |
20130319964 | Mobile Lift Crane with Variable Position Counterweight - A mobile lift crane includes a carbody; a rotating bed; a boom; a moveable counterweight unit; at least one linear actuation device; and at least one arm pivotally connected at a first end to the rotating bed and at a second end to the linear actuation device. The arm and linear actuation device are connected between the rotating bed and the counterweight unit such that extension and retraction of the linear actuation device changes the position of the counterweight unit compared to the rotating bed. In one method of operation, the counterweight unit is never supported by the ground during crane pick, move and set operations other than indirectly by the ground engaging members on the carbody. | 12-05-2013 |
212197000 | Along rectilinear path | 8 |
20130112642 | Lift Crane with Moveable Counterweight - A lift crane includes a carbody; moveable ground engaging members; a rotating bed rotatably connected to the carbody; and a boom pivotally mounted on the rotating bed. The crane is configured for assembly in at least two configurations. In the first configuration, the crane further includes a live mast; a first counterweight support frame; and a first movable counterweight unit moveably connected to and supported by the first counterweight support frame. In the second configuration, the crane further includes a lattice mast; a second counterweight support frame; a moveable counterweight support beam coupled to the second counterweight support frame and operable to move relative to the second counterweight support frame; and a second moveable counterweight unit moveably connected to the moveable counterweight support beam. | 05-09-2013 |
20130292352 | MOBILE REAR COUNTERWEIGHT DEVICE FOR CRAWLER CRANE - A mobile rear counterweight device for crawler crane is provided wherein comprising: a slide rail, mounted at the rear of the crawler crane, and one end of the slide rail is connected with the rear of the main platform while the other end of the slide rail is connected with a mast by a pull rod; and, a hoist driving mechanism and a trolley driven by the mechanism, one end of the said mechanism is connected with the end of the slide rail which is near the rear of the main platform, the other end of the mechanism is connected with the trolley, the said trolley bearing counterweight block is mounted on the slide rail. The crane is accessible to the utmost extent to attain the max lifting load and stability by using counterweight blocks, and the barycenter of the crane closes to the center of rotation, and the trolley is driven by a hydro cylinder and a connecting rod mechanism, while the trolley is carrying the counterweight is blocks and going faraway from or near to the barycenter of the crane along the slide rail at the rear of the crane, so that enhances lifting capability of the crane and keeps stability of the crane. The mobile rear counterweight device is easy to assemble, disassemble and transport. | 11-07-2013 |
20160090278 | CRANE, IN PARTICULAR DERRICK CRANE - The present disclosure relates to a crane having a travelable undercarriage and a superstructure which is rotatably supported thereon, to which a boom is luffably connected in an articulated manner, on the one hand, and a counterweight arrangement is telescopically supported, on the other hand. In accordance with the present disclosure, the counterweight arrangement comprises a U-shaped frame in which a likewise U-shaped counterweight frame is telescopically guided. The counterweight plates forming the counterweight are separated into two stacks which are each longitudinally displaceably guided on a side member. | 03-31-2016 |
20160185576 | MOBILE CRANE WITH BALLAST RECEIVING APPARATUS - The invention relates to a mobile crane having an undercarriage and a superstructure rotatable with respect to the undercarriage about an axis of rotation and having a ballast receiving apparatus arranged at the superstructure and having at least one ballasting cylinder for receiving ballast. In accordance with the invention, the position of the ballasting cylinders receiving the ballast is varied in the ballast receiving apparatus such that the ballast can be received in positions of different distances from the axis of rotation of the superstructure. | 06-30-2016 |
20180022586 | MOBILE CRANE HAVING ADJUSTABLE BALLAST MOUNTING APPARATUS | 01-25-2018 |
212198000 | On wheeled carriage | 3 |
20080264887 | MAST RAISING STRUCTURE AND PROCESS FOR HIGH-CAPACITY MOBILE LIFT CRANE - A mobile lift crane includes a carbody having moveable ground engaging members; a rotating bed rotatably connected to the carbody such that the rotating bed can swing with respect to the ground engaging members; a boom pivotally mounted on a front portion of the rotating bed and a mast mounted at its first end on the rotating bed and having a second end; and at least one hydraulic cylinder pivotally connected at a first end to the rotating bed. The hydraulic cylinder is positioned and configured so as to be able to raise the second end of the mast from the mast being in a near horizontal position to a position where the mast is used during crane pick, move and set operations. In a preferred embodiment, at least one arm is pivotally connected at a first end to the rotating bed and at a second end to the hydraulic cylinder. The arm and cylinder are connected together such that extension and retraction of a piston within the hydraulic cylinder causes the second end of the arm to raise and lower. The arm and cylinder support at least one mast-engaging member positioned such that raising the second end of the arm causes the mast-engaging member to push against and raise the mast when the mast is in a set-up state. Thus the hydraulic cylinder is used to pivotally rotate the mast about its connection to the rotating bed, thereby raising the second end of the mast. | 10-30-2008 |
20130098860 | Lift Crane with Moveable Counterweight - A lift crane includes a carbody; moveable ground engaging members mounted on the carbody allowing the crane to move over the ground; a rotating bed rotatably connected to the carbody about an axis of rotation; a boom pivotally mounted about a boom hinge point on the front portion of the rotating bed and including a hoist line for handling a load; a counterweight support beam coupled to the rotating bed; and a moveable counterweight unit comprising a counterweight tray suspended beneath the counterweight support beam wherein the counterweight tray is operable to move toward and away from the boom during a pick, move, and set operation by moving relative to the counterweight support beam. The crane has at least two set-up configurations: in a first set-up configuration the crane comprises a live mast, and in a second set-up configuration the crane comprises a lattice mast. The crane is configured such that the counterweight unit is never supported by the ground other than indirectly by the moveable ground engaging members on the carbody throughout a pick, move, and set operation. | 04-25-2013 |
20130161278 | MOVABLE WEIGHT COUNTERBALANCE APPARATUS OF CRAWLER CRANE AND CRANE CONTAINING APPARATUS THEREOF - The present invention discloses a mobile counterweight equipment of crawler crane, which includes a main platform, wherein the said mobile counterweight equipment further includes a pair of sliding rails on two sides of the main platform, slider means and counterweight equipment on the said sliding rails; the said counterweight equipment is connected to the said slider means, the said slider means slides back and forth on the said sliding rails. The beneficial effects of the present invention are: the total weight of the counterweight is greatly reduced, the structure is simplified and it is easy to operate and to maintain. | 06-27-2013 |