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| Number | Title | Issue Date |
| 7322786 | Mobile loader for transfer of containers between delivery vehicles and marine terminal cranes A mobile loader is driven to a dockside location underlying the spreader bar of a marine terminal crane. A delivery vehicle such as a train or a truck is driven into the loader at such dockside location so that containers maybe transferred between the delivery vehic... | 01/29/2008 |
| 7194358 | Lift collision avoidance system The present invention is directed to systems, devices and methods for avoiding collisions and detecting objects proximate to a surface. In one embodiment, a system for collision avoidance includes at least one sensor adapted to sense an object above a lift device an... | 03/20/2007 |
| 7061438 | Radio-control antenna support arm for lifting machinery The invention relates to radio-control of lifting machinery, and is intended to solve problems due to the presence of interfering metal masses. For this purpose, the support arm of the radio-control antenna is mounted such that it is able to be orientated about a ve... | 06/13/2006 |
| 7034669 | Anti-collision protection system An anti-collision protection system for machines that operate in a raw material stockpile yard is disclosed. The machines are moveable in the yard in defined paths, with each machine including a material delivery and/or material recovery boom that can be rotated abo... | 04/25/2006 |
| 6499610 | Portable hoist system A portable hoist system includes a base assembly which includes a pintle. Slidably mounted over the pintle is a hoist support assembly. The hoist support assembly includes a substantially vertical tube which is connected at its top portion to a support ar... | 12/31/2002 |
| 6252513 | Pole alarm system A Pole Alarm System including an electromagnetic field sensor and collision sensors for detecting overhead power lines and physical obstructions within the intended path of a telescoping mast or utility boom device is disclosed. The present alarm system i... | 06/26/2001 |
| 6230090 | Interference prevention system for two-piece boom type hydraulic excavator When an arm end exceeds a boundary line K2 and enters a slowdown area R1, a proportional solenoid pressure reducing valve 13 is operated to reduce a pilot pressure for slowing down a first boom cylinder 1A, thereby slowing down an arm end speed. When the ... | 05/08/2001 |
| 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 |
| 6133841 | Pole alarm system A Pole Alarm System including an electromagnetic field sensor and collision sensors for detecting overhead power lines and physical obstructions within the intended path of a telescoping mast or utility boom device is disclosed. The present alarm system i... | 10/17/2000 |
| 6102373 | Crane swing warning system Crane swing warning system is disclosed for a crane that has an undercarriage, which is independent from its cab body, connected by a turntable that the upper crane body rotates about on a vertical axis. The crane swing warning system consists of a contin... | 08/15/2000 |
| 5730305 | Crane safety apparatus A crane safety apparatus for displaying a schematic diagram of a part of a crane mechanism on a two-dimensional screen dynamically as the crane mechanism is operated, and displaying on the same screen a predetermined operation zone as a visually discrimin... | 03/24/1998 |
| 5678707 | Mechanism for rotating a crane turret through a 500° arc A crane apparatus includes an upstanding mainframe and a boom unit that is supported for rotation on the mainframe through a range of movement of about 500°. The crane is provided with a plurality of fluid transmission lines having first ends fixed relat... | 10/21/1997 |
| 5676264 | Hydraulic boom stop A hydraulic boom stop for a crane that permits operation at angles greater than the normal maximum operating boom angle of the crane boom. The hydraulic boom stop has at least one hydraulic cylinder and a hydraulic control system that is user controlled. ... | 10/14/1997 |
| 5490081 | Working tool operation range limiting apparatus The velocity of a working tool of a hydraulic excavator can be automatically decelerated and stopped just before the working tool would encounter an obstacle. Hazard regions and decelerating regions which correspond upward, downward, forward, and other po... | 02/06/1996 |
| 5343739 | Gantry crane collision avoidance device A transmitter attached to the overhang of a hoisting crane that is movable over rails. The transmitter is operative to transmit signals to receivers also mounted on the hoisting crane. During movement of the crane, the signals may be blocked by objects th... | 09/06/1994 |
| 5332110 | Tractor mounted hydraulic pipelayer with side boom A tractor having a pair of endless, segmented, high drive tracks includes a side boom and a side-mounted counterweight. Boom angle is controlled by a boom winch with a load winch provided for lifting a load. Both winches are hydraulically driven and provi... | 07/26/1994 |
| 5211526 | Mobile crane A modular, readily assembled crane for mounting on a vehicle trailer hitch drawbar and reconfigurable for stand alone, rollabout operation. A receptacle rotatably supports a vertical column, boom arm, and lifting device, which may be a hydraulic jack or a... | 05/18/1993 |
| 5198800 | Alarm system for constructional machine An excavator includes an upper structure swingably supported by a lower structure. A worker position sensor consists of a plurality of radio frequency transceivers provided in the excavator and a radio frequency transceiver carried by each of the excavati... | 03/30/1993 |
| 5160056 | Safety device for crane A safety device for a crane which can make a safety operation precisely taking a relationship between a swinging condition of a boom and a limit working region into consideration. In the device, a working radius and a swinging angle of the boom and projec... | 11/03/1992 |
| 5094353 | Clamping device for crane or the like The disclosure herein describes a clamping device to be mounted to an elet of a crane and which provides contact surfaces for limit switches that maintain the movement of a movable crane structure within predetermined limits. The clamping device defines ... | 03/10/1992 |
| 4979588 | Overhead impact sensing system An electrical deactivation circuit and a two piece overhead guard assembly including two separately movable bar members which extends upward and over the head of an operator located on the upper work platform of an aerial work platform. The guard bar memb... | 12/25/1990 |
| 4752012 | Crane control means employing load sensing devices A large mobile tower crane comprises a vertical multi-section lattice-type tower having its lower end fixedly mounted on the rotatable upper section of a self-propelled vehicle and a load-supporting multi-section lattice-type crane boom having its base en... | 06/21/1988 |
| 4685860 | Apparatus for loading a wheelchair or similar object An apparatus for loading a wheelchair or similar object into a vehicle. When in a stored position, the apparatus and wheelchair are fully contained within said vehicle. A first embodiment illustrates use of the apparatus in a rear compartment of a station... | 08/11/1987 |
| 4675664 | Alarm system and method for detecting proximity of an object to electrical power lines An antenna receives, by capacitive effect, a current of which the intensity is a function of the distance separating the antenna from an electrical power line. The other factors that influence the current are fixed, constant or are considered negligible. ... | 06/23/1987 |
| 4660729 | Method and apparatus for preventing boom overload A boom overload protection apparatus generally used in the protection of derrick-type hydraulic equipment having a boom or power arm for lifting or maneuvering heavy objects. A sensing rod is longitudinally connected to said boom in such manner as to sens... | 04/28/1987 |
| 4649375 | Apparatus for detecting power lines Apparatus for mounting on a crane or other construction equipment for detecting the presence of an electrical power line. A reference pickup coil mounted on an upper machinery works or other portion of the equipment generates a reference signal proportion... | 03/10/1987 |
| 4598829 | Hydraulic circuit for crane A hydraulic circuit for a crane having both lift and boom hoist pumps driven by the same engine with appropriate control valves to independently control the lift hooks and the boom angle. An unloading valve is interposed in the boom hoise circuit and dump... | 07/08/1986 |
| 4589076 | Method for controlling stretching and contracting operations of telescopic multistage boom A method for controlling operating cylinders in extending and contracting operations of a multistage telescopic boom including a base boom portion, an intermediate boom portion and a fore boom portion, the method including the steps of detecting the lengt... | 05/13/1986 |
| 4535899 | Boom warning actuator A fluid pressure--activated warning system for a crane comprising a plurality of signal device actuators each further comprising a valve spool, shiftable in response to a dangerous condition, and adapted to permit the emission of an alarm on the occurrenc... | 08/20/1985 |
| 4523686 | Anti-two block system An improved anti-two block system having a boom hoist drum driven by a first hydraulic motor with a first variable displacement motor controlled by a first ram moveable in a given direction to supply fluid pressure for driving the boom drum to lower a boo... | 06/18/1985 |
| 4516117 | Range controller for continuously monitoring the position of the boom of heavy machinery A range controller for continuously monitoring the position of the boom of heavy machinery, is disclosed. The range controller comprises position sensors mounted on the boom and on the machinery for continuously detecting the position of the boom with res... | 05/07/1985 |
| 4498370 | Power transmission A hydraulic system for synchronizing telescoping sections of a crane boom comprising a fixed section and second, third and fourth sections that can be extended and retracted, hydraulic cylinders between the sections for extending and retracting the adjace... | 02/12/1985 |
| 4436476 | Rod device for use as an arm of an excavator A rod device for use as an arm of an excavator, so as to be pivotally supported by a boom and inclined relative to the boom by an actuator, including a plurality of tubular elements assembled in a telescoping manner, means for restricting relative axial m... | 03/13/1984 |
| 4424909 | Crane boom warning actuator A fluid pressure-activated warning system for a crane comprising a plurality of signal device actuators each further comprising a valve spool, shiftable in response to a dangerous condition, and adapted to permit the emission of an alarm on the occurrance... | 01/10/1984 |
| 4236864 | Safety control system for the boom of a crane A safety control system for a crane adapted to prevent exceeding the uppermost safe elevation of each articulated section of a boom and the safe swinging limits right and left of the boom, which is also adapted to allow the crane operator to preset the sa... | 12/02/1980 |
| 4141454 | Crane with "Z" configured boom A crane having a boom pivotally mounted mesially thereof to a mast which is itself pivotally mounted on a base platform. A generally horizontally disposed control beam is line attached to the free, rear end of the boom and includes a hydraulic fluid-compr... | 02/27/1979 |
| 4119212 | Monitoring the location of a robot hand A robot arm, comprising a pair of arm elements interconnected by a pivotal joint, includes a hand for supporting an article. Two additional linking elements of known lengths, interconnected by a free-floating pivotal joint, are pivotally coupled, at the f... | 10/10/1978 |
| 4099628 | Towing vehicle A towing vehicle which has a frame and a drive train for propulsion of the vehicle along a roadway and which includes a turntable mounted on the frame for rotation about a vertical axis, a boom assembly fixedly attached to the turntable, a telescoping boo... | 07/11/1978 |
| 4064997 | Crane swing safety control A system to prevent a crane turret and the boom carried thereby from rotating about the axis of the turret beyond a predetermined angular disposition, thereby to prevent the crane boom from being brought too close to high-tension wires or some other struc... | 12/27/1977 |
| 4044902 | Aerial lifting equipment Aerial lifting equipment having a platform, a support structure and means rotatably mounting the support structure upon the platform for rotation about a substantially vertical axis. A boom structure is mounted on the support structure for movement about ... | 08/30/1977 |
