A device for supporting a luggage item including a vertical base member, an arm, and carrying-element having a support surface. A guide guides vertical movement of the arm along a length of the base member, a driver drives vertical arm movement, a sensor determines force acting on the carrying element, a position sensor determines a vertical position and speed of the arm, and a controller controls the driver and sets a support force based on the determined vertical speed position of the arm.

A device for supporting a luggage item including a vertical base member, an arm, and carrying-element having a support surface. A guide guides vertical movement of the arm along a length of the base member, a driver drives vertical arm movement, a sensor determines force acting on the carrying element, a position sensor determines a vertical position and speed of the arm, and a controller controls the driver and sets a support force based on the determined vertical speed position of the arm.

A device and method for moving cargo on inclined, horizontal or vertical surfaces utilizes frictional forces selectively applied through the use of induced mechanical vibrations on a loaded, platform in conjunction with the force of gravity acting on the platform. The platform is vibrated to pivot or shift the platform relative to a support structure, engaging a portion of the platform secured to the platform with the support structure. At the furthest extent of this motion, the platform is pulled against the support structure by gravity, disengaging the portion from the support structure. In turn the pivot point for the device is shifted to the point of engagement between the platform and the support structure, which enables the portion of the platform to move upwardly along the support structure. The alternation of this engagement of the platform with the support structure causes the platform to move along the support structure.

This defining method (100) comprises the steps of: simulating a crane comprising: i) a boom made up of elements and ii) a lifting member that is able to move along the boom, selecting several elements to be tested, maximum stresses, and several ranges along the boom, and carrying out the following analysis steps of: choosing a theoretical load, calculating stresses brought about by the theoretical load in each element to be tested, comparing these stresses with maximum stresses, increasing or decreasing the theoretical load depending on whether stresses are less than or greater than the maximum stresses, repeating the calculating step and the comparison step and the step of increasing or decreasing until the maximum theoretical load is found, and recording i) the range and ii) the maximum theoretical load.

This defining method (100) comprises the steps of: simulating a crane comprising: i) a boom made up of elements and ii) a lifting member that is able to move along the boom, selecting several elements to be tested, maximum stresses, and several ranges along the boom, and carrying out the following analysis steps of: choosing a theoretical load, calculating stresses brought about by the theoretical load in each element to be tested, comparing these stresses with maximum stresses, increasing or decreasing the theoretical load depending on whether stresses are less than or greater than the maximum stresses, repeating the calculating step and the comparison step and the step of increasing or decreasing until the maximum theoretical load is found, and recording i) the range and ii) the maximum theoretical load.

The present disclosure concerns a crane, in particular a tower crane, telescopic boom crane, harbor crane and the like, with a load hook that can be raised or lowered via movable crane elements, and moved within a crane working area by operating drive units associated with the crane elements. The crane is provided with a control unit with input means to control the drive units. According to the present disclosure, the crane uses a mobile portable target signal transmitter that can be variably positioned in the crane working area, and positioning means for automatically determining the current position of the target signal transmitter relative to the load hook and/or a crane element, and target control means for automatically controlling the drive units in response to a signal from the positioning means, such that the load hook is automatically moved to the mobile target signal transmitter.

The present disclosure concerns a crane, in particular a tower crane, telescopic boom crane, harbor crane and the like, with a load hook that can be raised or lowered via movable crane elements, and moved within a crane working area by operating drive units associated with the crane elements. The crane is provided with a control unit with input means to control the drive units. According to the present disclosure, the crane uses a mobile portable target signal transmitter that can be variably positioned in the crane working area, and positioning means for automatically determining the current position of the target signal transmitter relative to the load hook and/or a crane element, and target control means for automatically controlling the drive units in response to a signal from the positioning means, such that the load hook is automatically moved to the mobile target signal transmitter.

A method and apparatus are disclosed for retrofitting a pedestal crane, the method comprising removing an existing motor generator controller for a motor in the pedestal crane; and replacing the motor generator controller with a digital controller.

A method and apparatus are disclosed for retrofitting a pedestal crane, the method comprising removing an existing motor generator controller for a motor in the pedestal crane; and replacing the motor generator controller with a digital controller.

A davit assembly comprises a vertical structural column connecting a horizontal structural beam between a longer forward beam portion and a shorter rearward beam portion thereof, an angled support brace tensioned between a lower region of the structural column and an end of the shorter rearward beam portion and a primary rigging anchor slidably engaging the forward beam portion.