MANITOWOC CRANE GROUP FRANCE Patent applications |
Patent application number | Title | Published |
20100206832 | DELIVERY TOWER CRANE JIB WITH FURLING DEVICE - The jib is made up of at least two jib elements connected by a pivot pin, the furling device includes an actuating cylinder one end of which is permanently articulated to the first jib element and, secured to the second jib element, a set of attachment points laid out on one and the same circle centred on the pin, the other end of the actuating cylinder is selectively and detachably connected to one of the attachment points so that the jib can be furled or unfurled through a succession of rotations corresponding to the angular spacing between two consecutive attachment points, where means temporarily immobilize one jib element with respect to the other in intermediate furling positions when the actuating cylinder has been detached from one attachment point in order to be attached to the next one. | 08-19-2010 |
20100006530 | METHOD FOR CONTROLLING THE SLEWING MOVEMENT OF THE ROTARY PART OF A TOWER CRANE - A rotary part of a crane is associated with an electric slewing mechanism including at least one geared electric motor unit of which the electric motor is powered in such a way as to produce a slewing torque having a certain maximum value. When the crane is in use and for conditions such as windspeed greater than a given value, jib length greater than a given value and moment of the lifted load greater than a given value, the maximum value of a slewing torque produced by the electric motor is increased. The crane thus becomes easier to drive, particularly in the phases during which the jib is adopting a “windward trend”. | 01-14-2010 |
20090308827 | DEVICE FOR PLACING A TOWER CRANE IN WEATHERVANING MODE - Each arm of the scissors comprises a handle with a rigid outer ring and an inner ring made of a flexible and elastically deformable material. The flexible inner ring includes a part resembling a length of tube and receiving one or more of a user's fingers, and a thin membrane-like part which connects the preceding part to the rigid outer ring of the handle. This configuration is both comfortable and firm. | 12-17-2009 |