Abstract: The method of radio communication between columns of a lift allows for use of a bridge consisting of at least two lifting columns and simultaneous operation of several bridges in a multichannel mode. The radio channels are selected in a pre-determined frequency band. The bridges synchronize respective columns in the course of the lifting operations and in the event of a fault in at least one column or in the event of an emergency stop. The method includes a first phase of triggering waiting and scanning, followed by a second phase of inscribing the columns for the construction of the bridge, and followed by a third phase of exploitation in the course of which each column of a constructed bridge dialogs with the others in the radio broadcasting mode, with an equal weight for all the columns.

Abstract: The method of radio communication between columns of a lifting bridge allows for use of a bridge consisting of at least two lifting columns and simultaneous operation of several bridges in a multichannel mode. The radio channels are selected in a pre-determined frequency band. The bridges synchronize respective columns in the course of the lifting operations and in the event of a fault in at least one column or in the event of an emergency stop. The method includes a first phase of triggering waiting and scanning, followed by a second phase of inscribing the columns for the construction of the bridge, and followed by a third phase of exploitation in the course of which each column of a constructed bridge dialogues with the others in the radio broadcasting mode, with an equal weight for all the columns.

Abstract: The invention relates to a hoisting device (1), in particular for a vehicle, including a substantially vertical column forming a frame (2) and lifting means (6) movable alongside said column (2) under the action of the control, by adequate driving means (12), to cause a threaded rod (9) to rotate and a nut (13) integral with said movable lifting means (6) on which the load to be lifted is designed capable of resting to move along the latter. In this hoisting device, the threaded rod (9) includes, at its lower end (14), a removable extension ferrule (15).

Abstract: The invention relates to a hoisting device (1), in particular for a vehicle, including a substantially vertical column forming a frame and lifting means movable along said column under the action of the control, by adequate driving means, to cause a threaded rod (2) to rotate and a nut (3) integral with a carriage (4) bearing the load (20) to be lifted to move along the latter. It is characterized in that this nut (3) is a catch nut, which comprises a first bearing nut (5) on which said carriage (4) rests, and a second safety nut (6) coaxial to the preceding one and placed below same, designed capable of receiving and bearing the load formed by said carriage (4) and its load (20) and by said first bearing nut (5) in the event of failure of the latter.

Abstract: A lifting device for a load, such as a vehicle, includes a substantially vertical column forming a frame and a lifting device movable along the column under the action of a rotation control of a threaded ball driven by a driving unit, a reversible-type nut, such as a ball nut, for moving along the threaded rod, and a friction unit capable of creating, during a control of a down movement of the lifting device, a resistance torque of a modulus at least equal to a torque generated by the load resting on the lifting device. The lifting device also including a device capable of overcoming the friction unit during a control of an up movement of the lifting device and a load-dividing unit for transmitting, at a level of the friction unit, only a proportional part of the load lifted by the lifting device.

Abstract: An hydraulic tensioning device wherein a shaft to which a cable may be attached for tensioning is coupled for movement to an hydraulically operated jack. The shaft is mounted for axial movement in a casing its axial and angular movement being controlled by a locking ring surrounding the shaft and angularly movable in the casing by actuating means which can be operated externally of the casing.