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| Number | Title | Issue Date |
| 7370723 | Loading machine A loading machine is disclosed with at least one drive train, with at least one overload protection device for the drive train and with sensors for determining an overload state in the drive train. Critical operating conditions of the loading machine can be determin... | 05/13/2008 |
| 7354028 | Method for controlling application of brakes in single drum hoist systems A method of damping the oscillations during an emergency stop of an ascending single drum hoist system in a shaft having a conveyance, the mechanical brakes applying a braking force to the drum and the drum rotating in a first direction having a speed, comprising ap... | 04/08/2008 |
| 7353959 | Variable-speed load-dependent drive and hoist system In an embodiment, a crane including a hoisting (i.e., load-lifting) mechanism is provided with a variable-speed load-dependent control system and method for operating functions of the crane. An exemplary control system includes an actuator subsystem for performing a... | 04/08/2008 |
| 7293670 | Upper block A crane having an upper block, a lower block, a drum, and two ropes. The upper block includes an equalizer having a yoke to which the ropes are connected. The connections between the ropes and the yoke include load cells that measure the forces carried by each of th... | 11/13/2007 |
| 7267241 | Device for determining a load on a hoist The invention relates to a device for determining a load on a hoist of a crane for handling a container, including rope drum, drive motor as well as hoist transmission disposed between drive motor and rope drum and having a hoist transmission case which is swingably... | 09/11/2007 |
| 7234684 | Hoisting device with load measuring mechanism and method for determining the load of hoisting devices A hoisting device, especially a cable or chain block, with a hoisting transmission having at least one shaft and with a hoisting load measuring mechanism. In order to determine the hoisting load as accurately as possible and possibly independent of the reeving and w... | 06/26/2007 |
| 7208896 | Electric jack load balancing method and device An electric jack load balancing method and device for reducing the difference in load carried by each jack of a pair of electric jacks while adjusting the attitude of a platform. The device includes a controller configured to reduce the difference in load carried by... | 04/24/2007 |
| 7206662 | Crane installation, in particular container crane A crane installation, especially a container crane, includes at least one hoist mechanism provided with at least one motor for lifting and lowering a load suspended from the hoist mechanism. The operation of the hoist mechanism is controlled by a control unit which ... | 04/17/2007 |
| 7199534 | Electric jack stroke limit detection method and device A method and device for detecting the stroke limit of an electric motor-driven jack while the jack is being used to adjust the attitude of a mobile platform. A controller is programmed to detect when an electric jack motor has driven a jack to a jack stroke limit by... | 04/03/2007 |
| 7193381 | Electric jack ground contact detection method and device An electric jack ground contact detection method and device for detecting ground contact of an electric motor-driven jack as the jack is being extended to adjust the attitude of a mobile platform. The device includes a controller that monitors the electrical power d... | 03/20/2007 |
| 7163112 | Material transloading equipment The invention concerns a material transloading equipment unit with an undercarriage and a turntable connected with this undercarriage by means of a track ring, on which an arm that can be pivoted by means of at least one hoisting cylinder is pivot-mounted. According... | 01/16/2007 |
| 7141946 | Method and apparatus for providing optimal acceleration feedback A method and apparatus for use with a motor controller that receives a command velocity and that applies voltages to drive a motor at the command velocity, the apparatus comprising a dual inertia lost motion assembly including a motor and a load couplable to the mot... | 11/28/2006 |
| 7138925 | Microprocessor integrated multifunction hoist system controller The present multi-function cable hoist system controller monitors a variety of drilling rig hoist system functions, including: positioning of the hoist block of the hoist system, speed/momentum of the hoist block, and hoist block loading. The controller can also mon... | 11/21/2006 |
| 7055382 | Wheel-acting force measuring device The invention provides a wheel-acting force measuring device free from the influences of cross talk due to brake torque (torsional torque). A hole is formed in or adjacent an axle of a vehicle at a brake caliper angle or an angle close thereto, and a stress d... | 06/06/2006 |
| 7026780 | Method for stabilizing the movement of an articulated chain of a chain block, especially to prevent the formation of a resonance oscillation of the chain, and a chain block apparatus The invention concerns a method for stabilizing the motion of an articulated chain of a chain block, especially to prevent the formation of resonance oscillation of the chain, in which an articulated chain is led across a polygonal chain wheel with non-uniform pitch... | 04/11/2006 |
| 7014054 | Overturning moment measurement system A stability measurement system is provided for a lifting vehicle including a vehicle frame, a turntable secured to the vehicle frame and supporting lifting components of the vehicle frame, and a turntable bearing disposed between the vehicle frame and the turntable.... | 03/21/2006 |
| 6994223 | Diagnostic readout for operation of a crane A programmable control system for a crane that senses a hydraulic pressure of the lift mechanism, and controls the movements of the crane apparatus as a function of the magnitude of the hydraulic pressure. As the status conditions of the crane change, sense switches... | 02/07/2006 |
| 6991119 | Measurement system and method for assessing lift vehicle stability A measurement system uses dual axis force sensor pins to effectively assess the tipping moment of a load-bearing vehicle and anticipate imminent tipping in any direction. The pins are installed in the pivot points of the boom of a lift vehicle and its main lift cyli... | 01/31/2006 |
| 6985795 | Material handler with center of gravity monitoring system A material handler that includes a frame, first and second front wheels, first and second rear wheels, and a control system. The front and rear wheels define a generally horizontal plane. The control system determines the center of gravity of the material handler an... | 01/10/2006 |
| 6954150 | Hydraulic shovel concurrently used for crane operations It is a subject of the present invention to provide a hydraulic shovel concurrently used for crane operations in which an operator may immediately be ascertained of conditions during crane operations as well as dangerous conditions occurring on the implement or the ... | 10/11/2005 |
| 6927772 | Method of displaying data Data is reduced to a graphic representation by have a core value which is wrapped by an annulus of a related value, the thickness of the annulus and the base diameter of the core representative of the magnitudes of the data being represented. A third data family can... | 08/09/2005 |
| 6843383 | Jib load limiting device A load limiting device for a jib extension includes a pivotal insert adjacent the tip of the jib extension, a cable sheave mounted on the insert, a force measuring device for measuring forces imposed upon the insert by a load on the cable, an angle transducer for me... | 01/18/2005 |
| 6785597 | Hydraulic stabilizer system and process for monitoring load conditions A process for monitoring load conditions on a lifting machine having a rated load moment includes determining an actual load moment of the lifting machine due a weighted load. The actual load moment may be determined by measuring a tilt pressure within a hydraulic t... | 08/31/2004 |
| 6779961 | Material handler with electronic load chart The present invention is directed to a material handler that includes a frame, a telescoping boom, a boom extension sensor, a boom angle sensor, and a control system. The telescoping boom is coupled to the frame, pivotable between a lowered and a raised position, an... | 08/24/2004 |
| 6735486 | Side load detection and protection system for rotatable equipment A side load detection and protection system (10) operable using pressure sensors (26, 28) to determine side load as a function of a difference in media pressure between two ports (40, 42) of a pneumatic/hydraulic rotation motor (22). When... | 05/11/2004 |
| 6655662 | Method for controlling crane brake operation The invention relates to a method for controlling the operation of a crane brake, the crane comprising an electric motor (2) controlled by means of a frequency converter (10) for hoisting and lowering movements of the crane; an electromechanical brake (9)... | 12/02/2003 |
| 6634514 | Control monitoring device for tower cranes The invention relates to a control monitoring device for tower cranes, in particular for small cranes, with integration of functions, and adapted for radio control. The device comprises, in respect of all the movements of the crane, such as hoisting, rota... | 10/21/2003 |
| 6587795 | Method for the overload protection of a mobile crane The invention relates to a method for the overload protection of a mobile crane, in particular of a crawler-mounted crane, in which component-related geometrical data are stored in a memory. In accordance with a selected set-up, the geometrical data are p... | 07/01/2003 |
| 6578441 | Crane testing apparatus and associated load testing method Two groups of test weights are stacked on a horizontal base frame transported to an aligned position underlying a crane to be tested for loading capacity. Such base frame is loaded with the test weights stacked thereon after assembly into a test apparatus... | 06/17/2003 |
| 6536615 | Load moment indicator of crane An load moment indicator, in a crane provided with hoist means of a main side and an auxiliary side, including a calculator in which a reference value if a rated load determined by the stability of a crane or the like is preset, a hoist load of the other ... | 03/25/2003 |
| 6527130 | Method and system for load measurement in a crane hoist The invention provides a load measurement in a crane hoist system. A parameter adaptation process uses a model of the system in order to measure the lifted load. A controller monitors hoist speed and hoist torque feedbacks that are input into the model an... | 03/04/2003 |
| 6474922 | Remote operation auxiliary hoist control and precision load positioner An electromechanical, remotely operated Auxiliary Hoist Control and Precision Load Positioner system and device is disclosed utilizing a Radio Frequency Hand Controller transceiver Unit distal to a Radio Frequency Hoist Controller Transceiver Unit for rai... | 11/05/2002 |
| 6405114 | Aerial work platform boom having ground and platform controls linked by a controller area network An aerial work platform supported by a riser boom, a telescoping main boom, and a jib boom. Boom movement may be controlled by a platform control module or a ground control module connected to a controller by a controller area network (CAN). Movement of t... | 06/11/2002 |
| 6328173 | Crane A crane having a hydraulically actuated jib system, at least one cylinder for actuating the jib system and an apparatus for monitoring the pressure in the cylinder, which indicates the crane loading, wherein the feed flow of hydraulic fluid to the cylinde... | 12/11/2001 |
| 6170681 | Swing type machine and method for setting a safe work area and a rated load in same A method for setting a safe work area and a rated load in a swing type work machine, as well as a swing type work machine which utilizes the said method, are disclosed. An area where a strength-based safe work area which is established taking the strength... | 01/09/2001 |
| 6079576 | Control device for a hoist mechanism of a crane The present invention relates to a control device for a hoist mechanism of a crane, preferably for a crane with a jib which can be varied in length and be luffed, with a hydraulic motor driving the hoist mechanism drum which motor forms a closed hydraulic... | 06/27/2000 |
| 6062106 | Side load sensor A side load sensor is provided for sensing the longitudinal load on a rotary worm which is used to rotate a turret on a utility vehicle and wherein a boom is mounted on the rotatable turret. The load sensor includes a gear housing mounted on the turret fo... | 05/16/2000 |
| 6050430 | Automatic leveling and synchronization system for counterweight removal and installation The automatic leveling and synchronization system for raising and lowering a counterweight includes at least a primary and secondary cylinder connected in series hydraulic communication. The primary cylinder includes a first rod connected to a first pisto... | 04/18/2000 |
| 6044991 | Load measuring apparatus for aerial booms and jibs A load measuring device for an aerial machine having a boom or jib which handles loads. A load bearing sheave has a winch line passed over it to raise and lower the load. A guide sheave maintains the winch line at a constant entry angle to the load bearin... | 04/04/2000 |
| 5992655 | Caterpillar sideboom replacement assembly A replacement assembly is provided for retrofitting old, discontinued, mechanically-operated, low-drive, Caterpillar sidebooms with a hydraulically-operated fail-safe sideboom system. Conversion of discontinued, mechanically-operated, low-drive, Caterpill... | 11/30/1999 |
