Cable transport installation, including: at least one carrier, a first hauling cable to haul at least one carrier and describing a first closed loop, and a second hauling cable to haul at least one carrier and describing a second closed loop, the second loop surrounding the first loop so as to create a separating space between the first and second hauling cables.

A system and method to ensure a sufficient amount of electrical energy is supplied to a cable-drawn vehicle of a transportation device. Electrical loads of the vehicle are supplied with power outside a station by an electrical energy store of the vehicle or by both an electrical energy store and the generator during a first movement phase, in which the vehicle is accelerated to a limit speed or, conversely, decelerated from a limit speed into a station. In a subsequent second movement phase, the vehicle is supplied with electrical energy by the generator while the vehicle moves at a speed that is greater than the limit speed.

A cable car system has at least two cable car stations and at least one carrying cable between the stations. A cable car vehicle is moved by a hauling cable between the car stations. The travelling positions of the vehicle along the travelling route are determined by a measuring device and transmitted to a control unit and processed and stored in same. A signal is input into the control unit by an input device located on a cable car support such that maintenance or assembly works and similar are carried out on this cable car support. When a cable car vehicle approaches the cable car support, the drive for moving the at least one cable car vehicle is controlled by the control unit such that the cable car vehicle is moved at a significantly reduced speed in relation to the operating speed, or is stopped at the cable car support.

A cable car system has at least two cable car stations and at least one carrying cable between the stations. A cable car vehicle is moved by a hauling cable between the car stations. The travelling positions of the vehicle along the travelling route are determined by a measuring device and transmitted to a control unit and processed and stored in same. A signal is input into the control unit by an input device located on a cable car support such that maintenance or assembly works and similar are carried out on this cable car support. When a cable car vehicle approaches the cable car support, the drive for moving the at least one cable car vehicle is controlled by the control unit such that the cable car vehicle is moved at a significantly reduced speed in relation to the operating speed, or is stopped at the cable car support.

A transport system for carrying a proppant, the system comprising a loading tower, a first transfer tower, a second transfer tower and an unloading tower. The loading tower is located proximate a loading area while the unloading tower is located proximate an unloading area. The system also includes a first transfer tower and a second transfer tower. A first aerial cable conveys a transfer container from the loading tower to the first transfer tower, while a second aerial cable conveys the transfer container from the second transfer tower to the unloading tower. The transfer container is configured to be suspended from the first and second aerial cables en route from the loading tower to the unloading area. Sand or supplies from the transfer container is received at the unloading area for use in a wellbore operation. Methods of transporting sand for use in wellbore fracturing operations are also provided.

A transport system for carrying a proppant, the system comprising a loading tower, a first transfer tower, a second transfer tower and an unloading tower. The loading tower is located proximate a loading area while the unloading tower is located proximate an unloading area. The system also includes a first transfer tower and a second transfer tower. A first aerial cable conveys a transfer container from the loading tower to the first transfer tower, while a second aerial cable conveys the transfer container from the second transfer tower to the unloading tower. The transfer container is configured to be suspended from the first and second aerial cables en route from the loading tower to the unloading area. Sand or supplies from the transfer container is received at the unloading area for use in a wellbore operation. Methods of transporting sand for use in wellbore fracturing operations are also provided.

A system, method and device for moving gondola cabins in a single vertical loop so as to pass above and below with end stations turning wheels placed vertically. The hauling ropes operate in a vertical loop and permit the vertical circulation of the cabins between stations with passenger boarding and deboarding of the cabins in the stations at two different levels. The system may be twinned to provide two parallel, horizontally adjacent systems operating on common towers to double the capacity of a single system. Both the single and twinned systems possess a smaller footprint than conventional horizontal transport systems.

A line cart puller for moving a line cart along overhead conductors and past support towers. The line cart puller has a workspace for supporting a user and/or payload therein, and has a drive wheel able to connect to and disconnect from an overhead conductor hi order to reposition the puller around and past a support tower. The puller also has a motor of a hand-operated tool able to removably connect to a transmission system for driving the drive wheel.

A line cart puller for moving a line cart along overhead conductors and past support towers. The line cart puller has a workspace for supporting a user and/or payload therein, and has a drive wheel able to connect to and disconnect from an overhead conductor hi order to reposition the puller around and past a support tower. The puller also has a motor of a hand-operated tool able to removably connect to a transmission system for driving the drive wheel.

An apparatus for moving ropeway vehicles in a ropeway system includes at least one conveying wheel being adjustable in height relative to the vehicles by a lifting device to be brought into abutment against the vehicles for displacing the vehicles along a track using the conveying wheel. An electric lifting device has an electric drive motor with a threaded sleeve or the like to be retained in its height position and rotated by the drive motor and a lifting spindle to be adjusted in height by the threaded sleeve for adjusting the conveying wheel in height. Upper and lower end surfaces of the threaded sleeve and the lifting spindle have stops located approximately in planes normal to the direction of rotation of the threaded sleeve or the like which, in upper and lower end positions of the lifting spindle, abut one another preventing further rotation of the threaded sleeve.