Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7703615 | Lattice piece for a large mobile crane and method of erecting the same This invention relates to a lattice piece for a large mobile crane, comprising four corner posts and null bars and diagonal bars connecting the same. In accordance with the invention, the lattice piece each is divided in two such that one part of the null and diagon... | 04/27/2010 |
| 7604134 | Portable knockdown trolley hoist A portable knockdown trolley hoist, comprising: an overhead trolley support member having a top portion and bottom portion opposing one another; a trolley having a plurality of upper roller bearings and a plurality of lower roller bearings, opposing first mounting p... | 10/20/2009 |
| 7422675 | Process for changing anodes in an electrolytic aluminum production cell including adjustment of the position of the anode and device for implementing the process A process for changing an anode of a cell for the production of aluminum by fused bath electrolysis including a plurality of anodes. According to the invention, an anode handling tool is used including a positioning device, a gripping device and a sensor detecting t... | 09/09/2008 |
| 7377398 | Portable knockdown trolley hoist A portable knockdown trolley hoist, comprising: a trolley support member having opposing ends; a trolley having a plurality of upper roller bearings and a plurality of lower roller bearings, the trolley rollably sandwiching an upper portion and a lower portion of th... | 05/27/2008 |
| 7376473 | Automatic LPG tank insertion apparatus for automobiles An automatic LPG tank insertion apparatus for automobiles has a rotary column provided with a lift body, which has a support arm. A rotating plate is rotatably mounted to the support arm such that yaw, pitch, and roll of the rotating plate can be controlled separate... | 05/20/2008 |
| 7367461 | Movable girder mounted jib A portable jib for movably mounting to a crane girder includes a base frame configured for traveling along a girder and a support member coupled to the base frame, wherein the support member extends substantially upward from the base frame. A boom is coupled to a fr... | 05/06/2008 |
| 7328810 | Crane supporting apparatus A crane support consisting of a steel square tubing pedestal having an apertured mounting plate fixedly attached to its upper end, and having an enlarged base fixedly attached to its lower end; an axle, the pedestal being mounting rotatably upon the axle; an auxilia... | 02/12/2008 |
| 7293668 | Manual boom lift method and apparatus Manual boom lift apparatus and method involve a base having three support legs, a fulcrum configured to fixedly mount the legs, a boom member detachably mounted on the fulcrum, the boom member including on either end a counterbalance arm configured for detachably mo... | 11/13/2007 |
| 7290672 | Tower crane device A crane tower device includes a basket that supports a tower crane and sits within a bay formed by the vertical columns of a building under construction. The basket and the tower crane are supported by support stubs that are attached to the vertical columns. Because... | 11/06/2007 |
| 7290671 | Crane A crane performs a self-assembling/disassembling operation using a hoisting winch, a hoisting rope, and a hanging hook, and includes a sheave device for guiding the hoisting rope on an upper portion of a lower boom. The sheave device includes a first sheave on a rea... | 11/06/2007 |
| 7255180 | Modular drill system requiring limited field assembly and limited equipment support A modular transfigurable drilling rig comprises one or more transfigurable containers with drilling equipment to form an operational drilling rig. The transfigurable containers include a first and second load bearing support and a load bearing bottom disposed betwee... | 08/14/2007 |
| 7243474 | Methods and apparatus for forming and placing generally horizontal structures One embodiment of the present invention provides for a method of placing a concrete structure in a generally horizontal position. The method includes building the concrete structure in an essentially vertical position, the concrete structure being defined by a first... | 07/17/2007 |
| 7156245 | Device for demountable assembly of the jib elements of a tower crane The invention is concerned with the demountable assembly of latticework jib elements comprising upper and lower chords connected to one another by means of triangulation bars. In the region of the upper chords, there is provided an assembly by shackle, tenon and a c... | 01/02/2007 |
| 7086547 | Travelling working machine This invention provides with a travelling working machine comprising an upper rotating body with a rotating frame and winches, a pair of right and left boom support frames formed in the rotating frame, and axial portions of the winches mounted inside rear portions o... | 08/08/2006 |
| 7059955 | Portable animal hoists A portable hoist for suspending a load, which may be an animal. The portable animal hoist may include a telescopic arm rotatable about a base. The base may be configured to be releasably attachable to many devices, one of which may be a receiver hitch on a vehicle. ... | 06/13/2006 |
| 7004337 | Foldable cab/pivot unit for a tower crane 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 t... | 02/28/2006 |
| 6918152 | Collapsible bridge and method of laying same A collapsible bridge and laying method for a collapsible bridge where bridge girders are pushed over an obstacle by way of a laying beam positioned in front of the obstacle to be bridged. Rollers and roller carriers carrying the rollers are fastened to the bridge gi... | 07/19/2005 |
| 6899238 | Methods and apparatus for supporting a davit arm A davit arm system includes a base that supports a davit arm and engages an underlying ground surface. The system components are preferably designed for arrangement in alternative ways to accommodate different installation environments, and/or for packaging in a bag... | 05/31/2005 |
| 6702132 | Crane self-assembly system A method of assembling a heavy duty mobile crane having a load handling boom that has a boom base section and other component parts. The method includes positioning the component parts adjacent said crane, such as on a truck, raising the parts from the tr... | 03/09/2004 |
| 6607331 | Elevated crane support system and method for elevating a lifting apparatus A support structure for supporting a lift crane, and in particular to a lift crane jack-up structures, including rigs, platforms, barges, boats or the like, wherein the lift crane is positioned about a leg of the jack-up structure atop the jack-house. The... | 08/19/2003 |
| 6588521 | Four track crawler crane A crawler that includes a first crawler assembly and a second crawler assembly attached to the first crawler assembly so that the first crawler assembly is aligned with the direction of travel of the second crawler assembly.... | 07/08/2003 |
| 6460307 | Boom attachment for a prime mover A boom attachment for a prime mover for lifting and setting trusses, walls, beams, and related structural components. The boom attachment for a prime mover includes a boom assembly including a prime-mover attachment assembly being adapted to mount to a pr... | 10/08/2002 |
| 6360905 | Crawler-mounted crane with detachable lateral stablizers The chassis of a mobile crane, which supports a revolving superstructure having a jib and a counter-jib, is detachably connected to lateral crawlers. To create a favourable stabilisation area for the crawler-mounted crane, cantilevering stabilisers are at... | 03/26/2002 |
| 6305560 | Multiple pedestal ring for ringer crane A system of multiple concentric annular support pedestal rings for providing load and counterweight support for a ring supported crane. The pedestal rings are fabricated from uniform sections of steel, which are mated at preferably triangular shaped ends.... | 10/23/2001 |
| 6045297 | Method and apparatus for drilling rig construction and mobilization The present disclosure is directed to a method and apparatus for drilling rig mobilization and demobilization. The rig is assembled or constructed at a remote site. It is later taken apart and transported to another remote site or back to a staging point.... | 04/04/2000 |
| 6021910 | Construction crane base 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 th... | 02/08/2000 |
| 5823279 | Carbody to crawler connection A connection for connecting a crawler to a carbody of a crane vehicle. The connection employs a vertical pin and a horizontal pin to carry the various forces present during the operation of a crane. The vertical pin allows for the crawler and carbody to b... | 10/20/1998 |
| 5649635 | Easily removable sheave assembly A crane boom top is disclosed in which a sheave assembly having a number of sheave sets is supported on the crane boom top by boom sheave supports. Each sheave set is mounted on an individual shaft and connectors connect the individual shafts to the boom ... | 07/22/1997 |
| 5542812 | Crane having swing away hoist mount A truck mounted crane assembly includes a turntable lock, a boom rest which interacts with the piston and cylinder device, and a swing away hoist mount. The turntable lock includes a pin which is manually retractable upon rotation of a handle from a posit... | 08/06/1996 |
| 5522515 | Ring segment connection A ring for supporting a lift crane includes at least two ring segments each having two ends, the ends of the ring segments comprising at least one horizontal plate and at least one vertical plate. The horizontal plates and the vertical plates of adjacent ... | 06/04/1996 |
| 5484069 | Process for self-disassembling a crawler crane A method and apparatus for self-assembling and self-disassembling a large capacity crawler crane. The method uses the load hoist line of a crane to remove the equalizer from the boom. The method also uses a hydraulic cylinder to support, raise and lower t... | 01/16/1996 |
| 5426907 | Construction crane base A platform assembly is designed for use in supporting a crane during the construction of a multi-story building. The assembly includes a platform for supporting a crane and means for cantilevering the platform from differing locations along the length of ... | 06/27/1995 |
| 5427256 | Crane upper works to lower works alignment system A system and method for aligning the upper works assembly to the lower works assembly of a crane to facilitate redecking of the assemblies. The system and method involves suspending, preferably by pendants, the lower works from the upper works in such a m... | 06/27/1995 |
| 5402898 | Crane having boom rest A truck mounted crane assembly includes a turntable lock, a boom rest which interacts with the piston and cylinder device, and a swing away hoist mount. The turntable lock includes a pin which is manually retractable upon rotation of a handle from a posit... | 04/04/1995 |
| 5337908 | Patient hoist Disclosed is a patient hoist for use in a room having a floor and at least one pair of parallel spaced walls at opposite sides of the floor. The hoist includes a frame having a pair of track beams and a pair of connecting beams, and a plurality of legs fo... | 08/16/1994 |
| 5240129 | Heavy duty crane with self-retracting/erecting live mast A traveling crane incorporates a self-retracting/erecting live mast or the like, pivotally mounted on the base unit and capable of moving to and from a flipped, stowed position on the opposite side of vertical from the positions of the normal operating mo... | 08/31/1993 |
| 5203837 | Balanced lifting crane A crane has a generally horizontally disposed main boom arm centrally pivotally mounted on a turret supported for rotation atop a central column. The main boom arm supports a load at one end and a counterweight at its other end. The main boom arm load sup... | 04/20/1993 |
| 5199586 | Quick-connect sectional boom members for cranes and the like 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... | 04/06/1993 |
| 5139157 | Concrete placing boom assembly for ready-mix concrete The invention is directed to a concrete placing boom assembly for use with two trucks. The assembly includes a base frame and a rotatable turret rotatably mounted on the base frame. A foldable boom is pivotally connected to the turret and includes a plura... | 08/18/1992 |
| 5083395 | Crab cage and pole apparatus The present invention provides a pole member organization, wherein a plurality of vertical posts are fixedly secured together joined at their upper terminal end to an "L" shaped junction. The "L" shaped junction includes a first horizontal post telescopin... | 01/28/1992 |
