| 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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| 01/21/1992 | US5082127 Collapsible lift trolley |
| 01/08/1992 | EP0464305A1 Hydraulic control device |
| 01/08/1992 | CN2092532U Tractor-borne crane |
| 01/05/1992 | CA2020390A1 Portable crane |
| 01/05/1992 | CA2020389A1 Load balancer |
| 01/02/1992 | DE4119289A1 Appliance for laying paving slabs - has motor driven winch mounted on swinging on swinging horizontal arm |
| 01/01/1992 | CN2091853U Controller of stability for derrick car |
| 12/31/1991 | US5076448 Portable hydraulic crane |
| 12/31/1991 | US5076375 Load cell |
| 12/26/1991 | WO1991019665A1 Hook lift display apparatus of crane |
| 12/24/1991 | US5074677 Center-free large roller bearing |
| 12/24/1991 | CA1293456C Carrier track assembly for extensible and retractable boom machines |
| 12/18/1991 | CN2090818U Moment limiter for 60-80 ton-meter whip tower crane |
| 12/18/1991 | CN2090817U Crane for 12-horsepower walking tractor |
| 12/17/1991 | CA1293176C Hydraulic lifting cylinder-piston unit |
| 12/12/1991 | DE4021937C1 Load distributing platform for groove support legs - has continuous parallel struts with several pressure or tensile supports in between |
| 12/11/1991 | EP0460476A1 Telescopic jib with extension mechanism |
| 12/11/1991 | EP0460475A1 Telescopic jib with coupling device for extension mechanism |
| 12/11/1991 | EP0460361A1 Method and device for stretching and folding a jib for crane |
| 11/20/1991 | CN2088998U Household crane for balcony |
| 11/12/1991 | US5064334 Wheel clamp |
| 11/12/1991 | US5064079 Knockdown hoist with double winches |
| 11/12/1991 | US5064078 Combination portable hoist, crane, and vehicle towing apparatus |
| 11/12/1991 | US5063716 Hoisting apparatus |
| 11/06/1991 | EP0454923A1 Slewing control device for crane |
| 11/05/1991 | US5062266 Slewing control device for crane |
| 11/05/1991 | US5062245 Telescopic beam |
| 10/29/1991 | US5060427 Extension and retraction system for four section telescopic boom having simultaneous and equal extension and retraction of the telescopic sections |
| 10/22/1991 | US5058752 Boom overload warning and control system |
| 10/16/1991 | EP0451655A1 Device for the rationalized bricklaying |
| 10/15/1991 | US5056673 Gin for electrical equipment |
| 10/03/1991 | WO1991014645A1 Method of and apparatus for controlling stopping of turning of upper swing unit for construction machines, and angle of inclination computing apparatus |
| 10/02/1991 | CN2085792U Hand-operated crane |
| 10/01/1991 | US5052566 Engine hoist and support apparatus |
| 09/25/1991 | EP0447511A1 Process and system for monitoring an installation, such as an automobile crane, large excavator or the like. |
| 09/25/1991 | CN1054753A Process for preparing high-purity calcium hydrogen phosphate with waste dregs from production of cyclohexanehexol |
| 09/24/1991 | US5051056 Portable boat jacking and rotating apparatus |
| 09/18/1991 | EP0446599A2 Vehicle mounted crane |
| 09/18/1991 | EP0446415A1 A jib hold rod securing device for cranes |
| 09/18/1991 | CN2084924U Electric interlock door of overhead travelling crane |
| 09/18/1991 | CN1054573A Goods elevator for building |
| 09/17/1991 | US5048172 Method for converting a "backhoe" to a "crane" using a "true free fall" hydraulic winch system |
| 09/12/1991 | DE4006860A1 Slewing all-wheel-drive crane - incorporates derricking joint slewing ring coaxially one above the other |
| 09/11/1991 | EP0446115A1 Multiple actuator, supply circuit for such an actuator and telescopic boom as an application of this actuator |
| 09/11/1991 | CN2084467U Energy-saving large torque moment low speed lifting machine for ship and construction |
| 08/28/1991 | EP0443353A1 Vehicle mounted telescopic crane |
| 08/28/1991 | CN1054051A Foldable crane with jib of two or three hinged parts |
| 08/13/1991 | CA1287618C Hydraulic leveling apparatus for recreational vehicle and the like |
| 08/06/1991 | US5037267 Load balancing mechanism |
| 08/06/1991 | US5036750 Pilot-operated dual check valve assembly with cross-line flow valving pilot pistons |
| 07/31/1991 | EP0438998A2 Transportation vehicle, in particular low floor vehicle, as well as method of loading and unloading the same |
| 07/30/1991 | US5035337 Mobile crane with counterweight and auxiliary counterweight |
| 07/24/1991 | EP0411126A4 Single-storey multispan module industrial building |
| 07/23/1991 | US5034892 Apparatus for suppressing vibratory or quaky movements of mobile type crane |
| 07/23/1991 | US5033717 Lifting device for vehicle parts |
| 07/20/1991 | WO1990008093A1 Container crane |
| 07/18/1991 | DE4000830A1 Ball-bearing slewing rim - incorporates two=part T=shaped ball-race and is used in dredgers or cranes |
| 07/11/1991 | DE4042003A1 Derrick type crane with pulley block - has cable guide pulleys arranged so that jib is raised by cable which lifts load |
| 07/11/1991 | DE4000288A1 Wall mounted crane assembly - has telescopic horizontal arm which can be swung about vertical axis |
| 07/11/1991 | CA2033633A1 Portable boat rotative mount |
| 07/09/1991 | US5029717 Crane |
| 06/05/1991 | CN2078312U Domestic miniature electric hoist |
| 05/29/1991 | EP0429413A1 An articulation with rotating hydraulic connection, in particular for mobile work machines |
| 05/28/1991 | US5018630 High-capacity lift crane assembly |
| 05/22/1991 | EP0428453A1 Robotic manipulator of large dimensions and capacity to be used in an open environment |
| 05/21/1991 | US5016768 Pickup truck derrick with traveling sheaves |
| 05/14/1991 | US5014863 Vehicle mounted crane |
| 05/08/1991 | EP0425733A1 Collapsible crane for mounting on vehicles |
| 05/08/1991 | EP0425667A1 Weight lifting device |
| 05/07/1991 | US5012939 Color coded boom and chart system for proportionally extensible boom assembly |
| 05/02/1991 | EP0424378A1 Rotator for crane-mounted working implements, especially tree-processing units. |
| 05/02/1991 | DE3936257A1 Tower for tower crane - is assembled from square frames fastened to each other by corner bolts |
| 05/01/1991 | CN2076091U Moment-limiter of single-boom crane |
| 05/01/1991 | CN2076090U Hydraulic wagon crane |
| 05/01/1991 | CN1051023A Self-hoisting unit of tq 60/80 type tower crane |
| 04/30/1991 | US5011364 Portable article handling/supporting apparatus |
| 04/25/1991 | DE3934922A1 Hoist with suction box and suction connecting union - has vacuum pump actuated by radio control circuit as switch |
| 04/24/1991 | CN2075639U Mechanical load limiter |
| 04/18/1991 | WO1991004938A1 Process and system for monitoring an installation, such as an automobile crane, large excavator or the like |
| 04/18/1991 | DE3934499A1 Transporter for prefab buildings - has wheel axles which are pulled against suspension towards chassis by tensioners fixed to axles |
| 04/18/1991 | DE3933834A1 Vehicle for handling large silage bales - has crane carrying rear section with coupling for trailer in crane reach |
| 04/17/1991 | CN2075187U Trackless wheel type manual crane |
| 04/17/1991 | CN2075186U Cycle tyre type movable jib hightower crane |
| 04/16/1991 | US5007544 Mechanism for suppressing displacement of travelling crane |
| 04/10/1991 | CN2074759U Load lifting frame for storied building |
| 04/09/1991 | US5005714 Crane, in particular a large mobile crane |
| 04/03/1991 | EP0420625A2 Safety device for crane |
| 04/02/1991 | US5004108 Cranes |
| 03/28/1991 | DE3930990A1 Roofing sheets placing machine - runs on wheels on roof girders and has pick=up device for corrugated sheets |
| 03/27/1991 | CN2073869U Omnibearing protector of loading moment for use in engineering hoister |
| 03/14/1991 | DE3928954A1 Crane-installation tackle on lorry - has travel chassis with supports offset sideways from each other |
| 03/13/1991 | CN2072964U Gripper hoisting machine |
| 02/27/1991 | EP0414646A2 Crane jib |
| 02/27/1991 | EP0413928A1 Distributing system with a concrete-distributing mast |
| 02/27/1991 | CN2072078U Multifunctional combined tower crane |
| 02/26/1991 | US4995518 Detachable floating counterweight |
| 02/26/1991 | US4995517 Mechanism for suppressing vibrations of travelling crane |
| 02/21/1991 | WO1991001937A1 Crane support |
| 02/21/1991 | WO1991001936A1 Rescue hoist |
| 02/20/1991 | EP0413119A2 Center open large rolling bearing |