| 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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| 07/14/1981 | US4278141 Undercarriage for adverse terrain vehicle |
| 07/14/1981 | US4278140 Undercarriage for adverse terrain vehicle |
| 07/07/1981 | US4277053 Lifting and handling equipment unit, especially for shipside operations |
| 07/07/1981 | US4276985 Truck mounted railroad crane |
| 07/07/1981 | US4276727 Telescopic jib for load-handling device |
| 07/01/1981 | EP0031035A1 Automatic resetting anti 2-block crane warning system |
| 06/30/1981 | US4275902 Crane or excavator with auxiliary mechanism for transferring superstructure loads to the ground |
| 06/23/1981 | US4274795 Load carrying vehicles |
| 06/23/1981 | US4274791 Towing and hoisting apparatus |
| 06/23/1981 | US4274542 Method for transfer of crane from tower |
| 06/23/1981 | CA1103621A2 Twin type slewing crane |
| 06/16/1981 | US4273244 Crane upperstructure self-transferring system |
| 06/16/1981 | US4273067 Method of operating twin hull semisubmersible derrick barge |
| 06/16/1981 | US4272932 Telescopic boom |
| 06/16/1981 | CA1103051A1 Load weighing device |
| 06/09/1981 | US4272221 Undercarriage for adverse terrain vehicles |
| 06/09/1981 | US4271578 Method and apparatus for removing a slewing ring from a pedestal mounted crane |
| 06/02/1981 | US4270663 Stop for crane boom |
| 06/02/1981 | US4270628 Elevator device preferably an elevator for building facades |
| 05/27/1981 | EP0029207A1 Sustainer for road vehicles with a loading device |
| 05/26/1981 | US4269396 Wrecker-hoist attachment for truck bed |
| 05/19/1981 | US4268216 Load lifting and carrying machine |
| 05/19/1981 | US4267934 Telescopically extendible mast crane |
| 05/12/1981 | USRE30611 Truck mounted hoist |
| 05/12/1981 | US4266903 Lifting dollie |
| 05/12/1981 | US4266809 Outrigger float pad assembly |
| 05/12/1981 | US4266680 Floating crane with load reslinging device |
| 05/12/1981 | US4266679 Convertible boom machine having modular bottom portion |
| 05/05/1981 | US4265579 Bulk material unloader |
| 05/05/1981 | CA1100446A1 Rotary tower crane for construction purposes with a distributor device for concrete |
| 04/28/1981 | US4264265 Adjusting slide mechanism for telescoping boom |
| 04/28/1981 | US4264014 Lock out means for pivotal axle suspension cylinders |
| 04/08/1981 | EP0026279A1 Method and device for transporting objects |
| 04/07/1981 | US4260064 Crane attachments for backhoe and tractor |
| 03/31/1981 | US4258853 Extensible boom for cranes |
| 03/31/1981 | US4258852 Auxiliary counterweight arrangement for mobile crane |
| 03/31/1981 | CA1098489A1 Low-profile crane without topping tower |
| 03/24/1981 | US4257201 Self-centering telescoping beams |
| 03/19/1981 | WO1981000744A1 Balancer |
| 03/17/1981 | CA1097592A2 Log skidder with folding arch |
| 03/17/1981 | CA1097591A1 Storable boom attachment for a construction machine |
| 03/17/1981 | CA1097590A1 Telescopic boom |
| 03/10/1981 | US4255076 Loading apparatus with extension boom (telescopic boom) and with hydraulic lines carried by the boom |
| 03/10/1981 | CA1097265A1 Color coded boom and chart system |
| 03/10/1981 | CA1097264A1 Climbing crane |
| 03/03/1981 | US4253579 Modular boom construction |
| 03/03/1981 | CA1096818A1 Truck mounted crane and method of constructing same |
| 02/24/1981 | US4252243 Crane safety device |
| 02/24/1981 | CA1096338A2 Telescoping aerial lift |
| 02/17/1981 | US4251059 Apparatus for determining the reeving of a pulley system |
| 02/03/1981 | US4248488 Quick disconnect bearing mount for construction machinery |
| 02/03/1981 | CA1094989A1 Heavy duty crane |
| 02/03/1981 | CA1094988A1 Hydraulically operated hoisting apparatus for a ship for picking floating objects up out of the sea |
| 02/03/1981 | CA1094987A1 Device for complete folding and unfolding of an articulated boom mounted on a telescopic crane |
| 01/27/1981 | US4247085 Combined bumper, jack and hoist |
| 01/20/1981 | US4245855 Vehicle stabilizer |
| 01/20/1981 | CA1093937A1 Overload protection apparatus for hydraulic multi- function equipment |
| 01/13/1981 | US4244599 Mobile machine comprising a stabilizer |
| 01/13/1981 | CA1093506A2 Multi-section lifting boom |
| 01/13/1981 | CA1093505A1 Ring supported tower crane |
| 01/13/1981 | CA1093270A1 Lattice beam-columns |
| 01/07/1981 | EP0021386A1 Construction element adjustable in length |
| 01/07/1981 | EP0021171A1 Double-linked crane jib system |
| 01/06/1981 | US4243148 Counterbalanced tower crane |
| 01/06/1981 | CA1093058A1 System for active compensation of unwanted relative movements, preferably during disposition of load (cargo) |
| 12/30/1980 | US4241838 Height-adjustable hoist |
| 12/30/1980 | US4241837 Convertible articulated crane |
| 12/23/1980 | US4240558 Self-propelled crane with a telescopic boom and additional boom means |
| 12/16/1980 | CA1091627A1 Conveyor belt shifting apparatus |
| 12/16/1980 | CA1091512A1 Stabilizing system for a crane vessel |
| 12/09/1980 | US4238037 Angle-of-heel control means for a floating crane |
| 12/09/1980 | US4238036 Hatch cover crane |
| 12/09/1980 | US4237857 Waste grease truck and method |
| 12/09/1980 | CA1091267A1 Undercarriage for adverse terrain vehicle |
| 12/02/1980 | US4236864 Safety control system for the boom of a crane |
| 11/25/1980 | CA1090440A1 Safe load indicator for jib cranes |
| 11/25/1980 | CA1090323A1 Winch mechanism for crane |
| 11/25/1980 | CA1090301A1 Arrangement for increasing crane capacity |
| 11/25/1980 | CA1090278A1 Person lifting device |
| 11/18/1980 | CA1089807A1 Elevator device preferably an elevator for building facades |
| 11/11/1980 | US4232792 Crane |
| 11/04/1980 | US4231313 Stabilizing system on a semi-submersible crane vessel |
| 10/29/1980 | EP0018075A1 Weight testing apparatus |
| 10/28/1980 | CA1088465A1 Multi-section lifting boom |
| 10/28/1980 | CA1088403A1 Hydraulic control and drive system for amphibious vehicle having a topside dragline draw works thereon |
| 10/21/1980 | US4228681 Crane load computer |
| 10/16/1980 | WO1980002136A1 A heavy-duty fore-and-aft working ship's crane |
| 10/16/1980 | WO1980002127A1 Towing apparatus |
| 10/15/1980 | EP0016761A1 A low-profile crane without topping tower |
| 10/07/1980 | US4226567 Apparatus for handling bobbins |
| 10/07/1980 | US4226402 Post puller |
| 10/07/1980 | US4226331 Hydraulically actuated hoist for tractors having a conventional three point hitch |
| 10/07/1980 | US4226300 Self propelled and extensible boom lift |
| 10/01/1980 | EP0016109A1 Crane operating aid with operator interaction |
| 09/16/1980 | US4222492 Method for extending a boom assembly |
| 09/16/1980 | US4222491 Crane operating aid and sensor arrangement therefor |
| 09/16/1980 | US4222332 Truck mounted railroad crane main bed frame |
| 09/16/1980 | CA1085780A1 Lift crane support system |
| 09/09/1980 | US4221300 Load-lifting crane |
| 09/09/1980 | US4221089 Fail-safe stop arrangement for crane boom extension cable |