| Patents for B66C 23 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes (16,687) |
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| 08/22/1989 | US4858890 Method and apparatus for lifting objects inside a limited access vessel |
| 08/16/1989 | CN2042839U Universal cantilever extension type household electric crane |
| 08/15/1989 | US4856662 Pedestal crane and method of assembling and erecting it |
| 08/03/1989 | DE3802166A1 Manipulating appliance for transporting and positioning objects |
| 08/01/1989 | US4852464 Two-stage telescoping hydraulic cylinder |
| 07/27/1989 | DE3841041A1 Gripper |
| 07/27/1989 | DE3801007A1 Rapid-motion control system for a push cylinder, in particular for a push cylinder of a loading crane |
| 07/25/1989 | US4850570 Unitized portable hoist |
| 07/19/1989 | CN2041312U Coordinating type troque displaying limiter |
| 07/13/1989 | WO1989006216A1 Rotator for crane-mounted working implements, especially tree-processing units |
| 07/12/1989 | CN2040897U Light tower crane |
| 07/11/1989 | US4846451 Movable vehicular engine support |
| 06/28/1989 | EP0321789A1 Level compensation controlling device for a work implement, particularly for a mobile extensible fire service turntable ladder |
| 06/28/1989 | EP0321484A1 Window installation |
| 06/28/1989 | CN2040089U Vibrationless luffing hydraulic system for door-base crane |
| 06/13/1989 | US4838522 Deepwater subsea lowering/lifting system |
| 06/13/1989 | US4838439 Hoist for use at a manhole |
| 06/13/1989 | CA1255635A1 Crane |
| 05/24/1989 | DE3738733A1 Laying apparatus for groups or layers of surface elements, in particular paving stones |
| 05/24/1989 | CN2038103U Anti-electric shocking radio warning and remoting control apparatus of crane |
| 05/09/1989 | US4828452 Single engine excavator capable of railroad use |
| 05/09/1989 | US4828125 Device for maintaining a tool attachment in a knuckle boom crane on a constant level above the ground |
| 05/09/1989 | US4828124 Extension jib for a boom |
| 05/09/1989 | CA1253911A1 Method and apparatus for minimizing effect of hard spots in rotating frame structure of mining machine on roller bearings |
| 05/03/1989 | EP0313695A1 Crane vessel |
| 05/03/1989 | CN2036941U Top slewing tower crane erected by equipment of itself |
| 05/02/1989 | US4826023 Crane for offshore platform and method of installing same |
| 04/27/1989 | DE3830203A1 Jib, in particular for cranes |
| 04/27/1989 | DE3734919A1 Jib with horizontal rope bracing |
| 04/26/1989 | CN2036527U Household equipment for hoisting heaver body for building |
| 04/04/1989 | US4818172 Parasitic crane |
| 03/29/1989 | EP0308758A2 Carrier track assembly for extensible and retractable boom machines |
| 03/28/1989 | US4815711 Hydraulic leveling apparatus for recreational vehicle & the like |
| 03/28/1989 | US4815614 Control system for a crane |
| 03/21/1989 | US4813845 Object transport apparatus |
| 03/16/1989 | DE3729456A1 Mobile outrigger for performing lifting, loading, and transporting operations, etc. |
| 03/15/1989 | CN2034166U Domestic lifter used on balcony |
| 03/07/1989 | US4809615 Method and apparatus for re-railing working platforms |
| 03/07/1989 | US4809472 Carrier track assembly for extensible and retractable boom machines |
| 02/28/1989 | CA1250546A1 Boom extension storage means and mechanisms |
| 02/22/1989 | CN2033001U Tower crane with base following storey rising |
| 02/15/1989 | CN2032611U Folding type fast erecting tower crane |
| 02/15/1989 | CN2032608U Hoisting and laying machine for laying blocks |
| 02/08/1989 | CN2032189U Double support hydraulic ail vat |
| 02/02/1989 | DE3723961A1 Connection of a live ring's bearing ring of a revolving superstructure or the like to a bogie or the like |
| 01/26/1989 | DE3723554A1 Connection between a bearing ring of a large rolling-contact bearing of a rotary platform or the like and a travel unit or the like |
| 01/25/1989 | CN2031395U Moment balance position-limiter |
| 01/19/1989 | DE3721625A1 System for compensating the position of a platform for hoisting gear on a vehicle |
| 01/18/1989 | CN2030993U Crane for walking tractor |
| 01/18/1989 | CN2030992U Pedal hydraulic lifting plate-vehicle |
| 01/18/1989 | CN2030991U Miniature mechanical (manual) lifting device for rural building construction |
| 01/18/1989 | CN2030990U Wall attaching self-open gantry |
| 01/17/1989 | US4798299 Pivot ring |
| 01/11/1989 | EP0298391A1 Building crane with a turning mast head constructed as a transport and assembly unit |
| 01/11/1989 | CN2030591U Small-tonnage wheeled trailed crane |
| 01/11/1989 | CN2030590U Domestic electric crane |
| 01/10/1989 | US4796861 Portable ram, engine stand and transmission cradle |
| 01/04/1989 | CN2030189U Domestic hand hoist |
| 01/04/1989 | CN2030188U Lift platform for maintaining building wall |
| 01/04/1989 | CN2030187U Crane for family use |
| 01/03/1989 | US4795136 Apparatus for erecting forms |
| 01/03/1989 | CA1248057A1 Power lift for a lifting device |
| 12/29/1988 | DE3719986A1 Tower slewing crane |
| 12/28/1988 | EP0296383A1 Turnable tower crane |
| 12/21/1988 | EP0296047A1 Multi-stage actuator with at least three sliding elements and telescopic jib incorporating this actuator |
| 12/21/1988 | CN87204783U Moving arm's variable moment limiting instrument in steel-yard lever type |
| 12/20/1988 | US4792734 Stepless speed change electric chain block |
| 12/20/1988 | US4792052 Apparatus for controlling the number of revolutions of an engine |
| 12/15/1988 | DE3817340A1 Apparatus on crane jibs |
| 12/13/1988 | US4790710 Tow truck |
| 12/13/1988 | CA1246495A1 Device of the kind comprising at least three movably co-ordinated parts |
| 12/06/1988 | US4789120 Carrier track system for extensible and retractable boom machines |
| 12/06/1988 | US4788820 Hydraulic circuit for large crane |
| 12/06/1988 | CA1246014A1 Compact foldable crane |
| 12/01/1988 | DE3714715A1 Crane support |
| 11/29/1988 | US4787524 Overload protection system for a crane |
| 11/24/1988 | DE3742217C1 Anchorage of a pillar crane |
| 11/23/1988 | EP0292290A1 Improvements in cranes |
| 11/17/1988 | EP0290681A1 Juncture assembly between assemblable elements of a support frame, in particular of a crane |
| 11/15/1988 | US4784565 Beam picker |
| 11/09/1988 | CN88210703U Domestic electric lifter |
| 11/08/1988 | US4782962 Back packable portable unit |
| 11/08/1988 | US4782662 Controlling rotational movement of a boom on a crane |
| 10/27/1988 | DE3713006A1 Equipment for jacking up vehicles |
| 10/27/1988 | DE3707521A1 Telescopic crane jib |
| 10/26/1988 | CN87208770U Expansion boom with suspension cable brace rod |
| 10/19/1988 | CN88210901U Miniature foldable remote control hoist |
| 10/19/1988 | CN88201435U Light crane tractor |
| 10/18/1988 | US4778330 Elevator device for an agricultural tractor loader |
| 10/18/1988 | CA1243278A1 Portable and collapsible derrick structure |
| 10/12/1988 | EP0285790A1 Single axle trailer with a pivotable crane |
| 10/12/1988 | CN87212746U Crane overrun controller |
| 10/11/1988 | CA1242993A1 Crane system |
| 10/05/1988 | EP0285182A1 Stabilizing device for a vehicle, particularly a rescue vehicle with an extensible rotating ladder |
| 10/05/1988 | EP0284831A2 Hydraulic control device for groups of consumers |
| 09/29/1988 | DE3708458A1 Device for arranging a lowerable counterweight of a cantilever crane |
| 09/22/1988 | WO1988007020A1 Object transport apparatus |
| 09/21/1988 | EP0282806A1 Control system for hydraulically actuated device especially a loading crane |
| 09/21/1988 | CN88201211U Lifter for building |
| 09/20/1988 | US4771988 Lifting apparatus for heavy folding doors |