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| Number | Title | Issue Date |
| 8074816 | Device for placing a tower crane in weathervaning mode The crane includes a rotating part composed of a jib and of a counterjib, and a mechanism for slewing the rotating part that has at least one geared motor unit with a motor and reduction gear, and an internal main brake which is deactivated when the crane is placed ... | 12/13/2011 |
| 7874438 | Boom assembly A boom assembly comprising: a base anchored to a structure/ground. A boom is rotatably mounted to the base at a connected end so as to be rotatable about a generally vertical axis, the boom having a device to support loads at a free end. An orientation clutch is pro... | 01/25/2011 |
| 7635063 | Swing stop for rotary crane An improvement for a railroad tie crane utilizes a movable stop mounted on an elongated member between a pair of cushioned terminals to reduce impact stress on equipment and personnel in situations where the tie crane must be prevented from fouling an adjacent track... | 12/22/2009 |
| 7370769 | Hoist for retrieving and lifting loads A hoist for retrieving, lifting and positioning a light load of up to about 1000 lbs, is described. The hoist comprises a boom support column having an attaching lower end and a boom support upper end. The boom support upper end has a boom assembly connector and a t... | 05/13/2008 |
| 7341157 | Enclosed-reeving, live-line boom A crane comprising a boom formed as an elongate tubular structure and a line assembly to extend a line from a least one end of the boom. The line assembly may include a first bank of sheaves, a second bank of sheaves, a line reeved around the first and second banks ... | 03/11/2008 |
| 7178181 | Portable hoist system for assisting in the movement of a disabled person A hoist and associated method for erecting the hoist for assisting movements of disabled persons. The hoist has a fixed-length stanchion that is supportable at opposing longitudinal ends thereof by first and second support members that are, in turn, fixed to a facil... | 02/20/2007 |
| 7172083 | Mobile hydraulic hoist A mobile hydraulic hoist unit which is readily maneuverable to a position straddling a load and then conveniently operated to lift and securely transport such load over a variety of terrains and surfaces and to safely and accurately deposit that load at a specific l... | 02/06/2007 |
| 7131548 | Folding pinnacle bending device A folding pinnacle bending device for a mobile crane (20) comprises a joint area (9) which is bent in order to adjust the angle of the folding pinnacle (10) and which comprises a joint (8) in its upper or tensile load area, wherein the jo... | 11/07/2006 |
| 6991120 | Device for raising and unfolding the mast and for raising the jib of a crane The device applies to a crane having multiple functions, with a modifiable configuration, which comprises a foldable mast, composed of two elements, and a distributing jib, composed of a plurality of successive elements. This device comprises a double-acting jack co... | 01/31/2006 |
| 6914397 | Reduction of interference currents in a group of synchronized, variable speed electric drives The simultaneous generation of interference currents with the same polarity is prevented in all converters of connected drives, without adversely affecting the time slice synchronization or the uniformity of the dynamic characteristics. This is achieved by taking ad... | 07/05/2005 |
| 6601719 | Locking and latching system for a telescoping boom A locking and latching system for use with a telescoping boom assembly in a crane or other lifting device is provided. The system may include complementary devices for latching and unlocking a selected boom section for telescoping movement relative to a n... | 08/05/2003 |
| 6592316 | Automatic pole guide transfer mechanism A digger derrick truck for installing poles into the ground. The digger derrick truck includes a boom on which a pole guide assembly is slidably mounted. The pole guide assembly is operatively associated with a latching mechanism which releasably couples ... | 07/15/2003 |
| 6575318 | Locking unit for a telescopic jib of a crane and telescopic jib A locking unit for a telescopic system of a hydraulically actuated telescopic jib of a crane, having a jib box frame and a plurality of telescopic sections which are guided inside one another and can be moved out of a starting position into in each case a... | 06/10/2003 |
| 6527131 | Crane with a telescopic boom Segments can be telescoped out of the base boom with boom guides of a telescopic boom of a crane, which in either their extended or retracted positions are locked by locking pins. After releasing the locking pin connections, the segments can be moved in a... | 03/04/2003 |
| 6520359 | Lateral boom locking and actuating unit A locking mechanism for telescoping sections, in particular for a mobile crane boom, includes a linearly shiftable locking bolt for connecting and releasing an inner telescoping section with respect to an outer telescoping section, said locking bolt being... | 02/18/2003 |
| 6474486 | Method of telescoping a crane jib, apparatus for implementing the method, and a crane jib constituting an application thereof The invention relates an apparatus for hoisting and handling equipment wherein the apparatus includes locking members having a locking block (30) carried by each telescopic element and including clamping member which is clamped in a rest position, an immo... | 11/05/2002 |
| 6216895 | Lateral jib locking device A locking assembly for the telescopic jib of a crane, or mobile crane, includes a plurality of telescopic sections wherein locking pins are supported in an inner telescopic section and are biased outwardly by means of a spring for engagement within receiv... | 04/17/2001 |
| 6206213 | Crane with a luffing jib A crane, includes a luffing jib having individual telescoping jib members, and a locking device configured for linkage of jib members and movable between an engagement position in which the jib members are locked together and a release position in which a... | 03/27/2001 |
| 6202868 | Collapsible hoist A vertical lift hoist and winch is taught which can be used, for example, for suspending wild game animals for the purpose of field dressing. The assembly is collapsible without any disassembly of major parts, to be able to fold up into a convenient carry... | 03/20/2001 |
| 6199442 | Slewing ring brake A slewing ring brake for use in heavy machinery including earthworking machinery. The slewing ring brake includes a slewing ring with a tooth system and a support member which is mounted in a manner to allow rotary movement of the support member relative ... | 03/13/2001 |
| 6189712 | Crane with telescope jib A crane includes a telescopic jib having telescopic jib sections and a base jib. The telescopic sections are arranged so that they can be axially moved into and out of the base jib individually. Locking pins are used hold the telescopic sections in place ... | 02/20/2001 |
| 6164468 | Jib positioning with hydraulic adjustment cylinder Apparatus for fixing the angular position of two telescopic parts relative to each other, comprising a stopper arranged on the first telescopic part and an adjuster provided with a shiftable element arranged on the second telescopic part. The adjuster com... | 12/26/2000 |
| 6149374 | Releasable locking mechanism for a liftarm of a machine A releasable locking mechanism has a lockbar which locks a hydraulic cylinder in an extended position for holding a liftarm assembly of a machine in a raised position. The lift cylinder has a body and an extendable rod which incorporates structure thereon... | 11/21/2000 |
| 6071065 | Safety brake apparatus for a vehicle lifting and towing mechanism A safety brake apparatus for a vehicle lifting and towing mechanism is provided that includes a minimum of a single riser plate mounted near the top of the vehicle lift's riser member. The riser plate includes a slider plate keyway and a cam bracket. A sl... | 06/06/2000 |
| 6062404 | Device and method for arresting sections of a telescopic jib The device and method for arresting movement of sections in a telescopic jib, which includes at least a first section and a second section and a telescopic cylinder telescoping the second section along a longitudinal axis of the telescopic jib relative to... | 05/16/2000 |
| 6010018 | Swing lock mechanism A swing lock mechanism for machines having an upper works rotatably mounted on a lower works by a swing bearing is connected to the drive shaft of a swing bearing drive assembly and comprises a swing lock plate, an annular pin support, and a plurality of ... | 01/04/2000 |
| 5865327 | Hydraulic boom for gantry and the like A hydraulic boom gantry and a method of lifting a load associated therewith. The gantry includes telescoping sections with a hydraulic cylinder mounted therein. A swiveling plate structure allows minor deviation between sets of telescoping sections. A col... | 02/02/1999 |
| 5769251 | Controlling operations of a reach tower crane An apparatus and a method for controlling the operation of a reach tower crane, in which a horizontal boom can safely and securely be operated or stored by one operator in the cab, and in which even if sensors are out of order, the stability of the crane ... | 06/23/1998 |
| 5634762 | Boom locking device for a skid steer loader A boom locking device for a skid steer loader includes a prop arm hingedly attached to a boom for swinging movement between a rest position generally in parallel to the boom and a proping position in a bearing engagement with the distal end of a boom cyli... | 06/03/1997 |
| 5628416 | Traveling crane with telescoping boom A traveling crane including a telescoping boom whose individual telescopically extending boom members are able to be extended and retracted after the disengagement of locking bolt connections using one single stage hydraulic piston and cylinder unit. The ... | 05/13/1997 |
| 5609261 | Pivotable boom rest and latch A boom latch system for a boom movable between use and stowage positions. The boom latch includes a latch member that is operatively connected to the power supply which moves the boom, so that the boom is automatically unlatched when moved from its storag... | 03/11/1997 |
| 5538150 | Boom latch A boom assembly includes a boom arm movable away from and into a first position used for storage and transport of the boom assembly, and a boom latch positioned adjacent a free end of the boom arm when the boom arm is in the first position for restricting... | 07/23/1996 |
| 5445281 | Light-duty electric crane A light-duty electric crane structure includes a base, a supporting mast, a movable boom and an electric winch. The base is mountable onto a truck body, and the supporting mast is placed into a holding pipe of the base and can be rotatably adjusted relati... | 08/29/1995 |
| 5429253 | Vehicle mounted lightweight pivoting hoist A mounted, elevatable, lightweight pivotal boom is provided which defines an elongate internal track defining a downwardly facing slot. An electromechanical winch mechanism is provided for lifting and handling objects such as the windshield of an automoti... | 07/04/1995 |
| 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 |
| 5393193 | Vehicle for transport and placement of grave headstones A two-wheeled trailer carries an adjustably rotatable crane to allow loading and placement of grave headstones by a single worker. The trailer provides a ladder type frame supporting a bed with upstanding sides and openable tailgate. The frame is supporte... | 02/28/1995 |
| 5269501 | Vehicle and vehicle parts transportation system A vehicle and vehicle parts transportation system used for moving, positioning and manipulating a vehicle and vehicle parts primarily when a vehicle is damaged or in the need of repairs. The system consists of a power module having interchangeable legs an... | 12/14/1993 |
| 5176267 | Quick disconnect system for construction equipment with rotatable upper works A quick disconnect system for a piece of construction equipment having an upper works rotatably mounted on a lower works, such as a crane, is disclosed. The system includes an adapter plate to which preferably the upper works is releasably connected, such... | 01/05/1993 |
| 5169277 | Lift arm lock down apparatus and method A lift arm lock down apparatus for a load lifting vehicle is described. The vehicle has a vehicle body and a lift arm or boom rotatable between a raised and a lowered position about a horizontal pivot on the vehicle body. The lift arm lock down apparatus ... | 12/08/1992 |
| 5141119 | Method for limiting movement of a boom The method of the invention includes moving a control stick to fix the boom in the desired position, and then locking the stick in the desired position so that the operator cannot move the stick. The apparatus of the invention includes a bracket connected... | 08/25/1992 |
