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| Number | Title | Issue Date |
| 7331476 | Lifting appliance A machine for lifting and handling loads with an orientable articulated placing jib, comprising a mast with a rotating pivot, an articulated jib (16) comprising a jib foot (19), articulated at its first end on the top of the mast by a horizontal rotati... | 02/19/2008 |
| 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 |
| 7311452 | Telescoping camera crane A telescoping camera crane has mechanical drive and camera platform leveling systems, allowing for water resistant or submerged operation. Telescoping sections of the crane arm are driven by a hydraulic system, for smooth and near silent extension and retraction mov... | 12/25/2007 |
| 7252441 | Telescoping camera crane A telescoping camera crane has mechanical drive and camera platform leveling systems, allowing for water resistant or submerged operation. Telescoping sections of the crane arm are driven by a hydraulic system, for smooth and near silent extension and retraction mov... | 08/07/2007 |
| 7128479 | Telescoping camera crane A telescoping camera crane has mechanical drive and camera platform leveling systems, allowing for water resistant or submerged operation. Telescoping sections of the crane arm are driven by a hydraulic system, for smooth and near silent extension and retraction mov... | 10/31/2006 |
| 7121745 | Telescoping camera crane A telescoping camera crane has mechanical drive and camera platform leveling systems, allowing for water resistant or submerged operation. Telescoping sections of the crane arm are driven by a hydraulic system, for smooth and near silent extension and retraction mov... | 10/17/2006 |
| 6499611 | Mobile harbor crane for normal and heavy load operation The invention relates to a mobile harbor crane for normal and heavy load operation, having an undercarriage and a superstructure mounted thereon. A tower is fastened on the superstructure and a jib which pivotable about a horizontal axis is arranged on a ... | 12/31/2002 |
| 6065620 | Movable sheave assembly for a crane A convertible crane with a movable sheave assembly which is operable in two distinct positions. In the first position, the sheave is adjacent the body of a crane to enable it to operate in relatively restricted space without interference from obstacles ad... | 05/23/2000 |
| 5934491 | Lifting device with counterweight A lifting device which includes a frame and an elongated boom having a lower end pivotally connected to the frame along a pivot axis. The lower end of the boom has a counterweight connected thereto offset from the pivot axis. The counterweight has a cente... | 08/10/1999 |
| 5615784 | Crane counterweight installation and removal apparatus A counterweight installation and removal apparatus for a truck-mounted crane includes a counterweight having a bottom surface, a plurality of rollers attached to either the bottom surface of the counterweight or to a crane carrier deck, and at least one i... | 04/01/1997 |
| 5609260 | Derrick structure An improved derrick structure comprising a column for supporting the derrick structure, a bracket horizontally rotatably mounted on the column, a boom vertically pivoted on the bracket so that the boom is divided into a first boom portion and a second boo... | 03/11/1997 |
| 5222613 | Pivotally-mounted reeved counterweight system A pivotally-mounted reeved counterweight system for a counterbalance-type crane which includes a wheeled counterweight carriage supporting a counterweight. A yoke provides the coupling means pivotally connecting the carriage and the rearward end of the pl... | 06/29/1993 |
| 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 |
| 4859133 | Fork lift truck and vehicle for the transport thereof Fork lift truck comprising a chassis, a front and a rear axle supported by the chassis and having wheels at their outer ends, a portal which is pivotally connected to the front of the chassis, a fork, on which a load can be placed, being movable along sai... | 08/22/1989 |
| 4788820 | Hydraulic circuit for large crane A hydraulic circuit for a large crane furnished with a counterweight carriage detachably connectable to the swivel unit of the crane. The hydraulic circuit includes first and second variable displacement pumps for supplying the working fluid to a hydrauli... | 12/06/1988 |
| 4773814 | Earth moving machine The earth moving machine has a body having a ground engaging propulsion device and a base frame mounted on the ground engaging propulsion device. The base frame is movable relative to the ground engaging propulsion device about a first generally vertical ... | 09/27/1988 |
| 4716728 | Hydraulic drive system for counterweight dolly in counterbalance type crane A hydraulic drive system for a counterweight dolly in a counterbalance type crane having a crane body provided with a lower travelling structure an upper swivelling structure and the counterweight dolly connected to the rear portion of the upper swivellin... | 01/05/1988 |
| 4716729 | Hydraulic drive system for a counterweight dolly in counterbalance type crane A hydraulic drive system for counterweight dolly in a counterbalance type crane, including dolly driving wheels supported vertically movably through wheel supporting hydraulic cylinders at the lower portion of the counterweight dolly which is connected to... | 01/05/1988 |
| 4614275 | Heavy duty crane A heavy duty crane which essentially includes in combination: a first mobile and swivellable base unit, a boom mounted on the first base unit, a second mobile and swivellable base unit, a counterweight mounted on the second base unit, a link frame interco... | 09/30/1986 |
| 4540097 | Crane with outboard counterweight carrier Disclosed is a crane wherein a trailer-like counterweight carrier has a horizontal motion transmitting connection with a platform which is swivelably mounted on a crane base and which supports the boom and the mast of the crane. Guy connections between th... | 09/10/1985 |
| 4508232 | Counterbalanced crane structure A windlock for selectively preventing relative pivotal movement between a mobile platform and a horizontal interconnecting stinger at the base of an elevated crane. The stinger is normally interconnected to one load platform for relative pivotal movement ... | 04/02/1985 |
| 4480757 | Collapsible frame support for pivotal boom on a portable crane A crane structure mounted on a transport vehicle, preferably a marine vessel, is disclosed. The crane structure includes a gantry structure mounted on a vertical tower structure and having boom portions protruding from the tower structure. Preferably, the... | 11/06/1984 |
| 4476955 | Articulated powered lift machines An articulated power lifting machine has a tool at the end of its working arm. The position of the sections of the working arm is sensed and made to operate a tool levelling system. That same sensor is made to move counterweights in a system which achieve... | 10/16/1984 |
| 4363411 | Hammerhead crane with plural shuttle trolleys, a load trolley and movable counterweight means A hammerhead type of crane has a structural tower with opposed structural cantilevers extending horizontally therefrom and there is a horizontal track along which a load carrying trolley may move through the tower between limits near the outer ends of the... | 12/14/1982 |
| 4349115 | Crane A counterbalanced crane structure having an upright boom and diverging staymast mounted to a ground supported mobile crane base. An independent mobile counterweight unit has a vertical counterweight strut connected to the outer end of the staymast. The co... | 09/14/1982 |
| 4299530 | Vehicle with adjustable balance weight A motor vehicle having excavating machinery mounted thereon and having at least two axles, at least one of which is driven, and further including an operator cab, the vehicle having counterweights on each lateral side of the cab, guides for the counterwei... | 11/10/1981 |
| 4280627 | Heavy-duty crane with counterweight In a heavy-duty crane particularly suitable for lifting heavy loads over tall buildings, a substructure supports a rotatable main boom. A jib for carrying the load and a secondary spar for carrying a counterweight by means of a cable are hinged to the tip... | 07/28/1981 |
| 4220246 | Sheave adjustable balance crane A crane structure is mounted on a platform and has a tower assembly with spaced apart columns spanned at their upper extremities by an upper structure. A gantry includes a central section, fixedly secured on the upper structure, and first and second outer... | 09/02/1980 |
| 4170309 | Counterbalanced tower crane A vertical tower and pivoted upper boom are counterbalanced by a mobile counterweight member mounted on a self-propelled earthborn unit spaced a substantial distance from the tower in diametric opposition to the boom. The tower, which is pivotable about a... | 10/09/1979 |
| 4113112 | Constant balance crane A constant balance crane has a control tower and a plurality of gantry members mounted on the tower between its base and its upper section. Trolleys on the gantries are movably mounted, and a lift mechanism is provided on at least one trolley. On at least... | 09/12/1978 |
