A trolley installer for use with a crane bridge is configured for supporting a trolley thereon. The trolley installer includes a lift system adapted for mounting to the crane bridge. The lift system includes a lift mechanism and a strand coupled to the lift mechanism. The trolley installer also includes a platform member including a table for supporting a trolley and an attachment mechanism for releasably coupling with the strand of the lift system. The lift mechanism is operable to lift and lower the platform member relative to the crane bridge.

A trolley installer for use with a crane bridge is configured for supporting a trolley thereon. The trolley installer includes a lift system adapted for mounting to the crane bridge. The lift system includes a lift mechanism and a strand coupled to the lift mechanism. The trolley installer also includes a platform member including a table for supporting a trolley and an attachment mechanism for releasably coupling with the strand of the lift system. The lift mechanism is operable to lift and lower the platform member relative to the crane bridge.

An overhead hoist transfer (OHT) apparatus and a differential overhead trolley thereof are provided. The OHT apparatus includes a rail module and a differential overhead trolley. The rail module includes a main rail and a first rail, and defines a turning path extending from the main rail to the first rail. The differential overhead trolley is movably disposed on the rail module, and includes a walking mechanism and a carrying body that is hung on the rail module by being connected to the walking mechanism. The walking mechanism includes two differential wheels and a driving unit that is connected to the two differential wheels. When the differential overhead trolley is moved along the turning path, the driving unit is configured to drive the two differential wheels to move along the first rail by different rolling velocities.

An overhead hoist transfer (OHT) apparatus and a differential overhead trolley thereof are provided. The OHT apparatus includes a rail module and a differential overhead trolley. The rail module includes a main rail and a first rail, and defines a turning path extending from the main rail to the first rail. The differential overhead trolley is movably disposed on the rail module, and includes a walking mechanism and a carrying body that is hung on the rail module by being connected to the walking mechanism. The walking mechanism includes two differential wheels and a driving unit that is connected to the two differential wheels. When the differential overhead trolley is moved along the turning path, the driving unit is configured to drive the two differential wheels to move along the first rail by different rolling velocities.

An overhead hoist transfer (OHT) apparatus, a guiding device of the OHT apparatus, and a direction maintaining module of the OHT apparatus are provided. The direction maintaining module includes a main channel, a first retaining channel and a second retaining channel that are spaced apart from the main channel, a switch channel, and a switching mechanism connected to the switch channel. The switch channel is disposed among the main channel, the first channel, and the second channel. The switching mechanism is configured to drive the switch channel to move between a turning position and a straight position. When the switch channel is at the turning position, the switch channel connects the main channel and the first retaining channel. When the switch channel is at the straight position, the switch channel connects the main channel and the second retaining channel.

An overhead hoist transfer (OHT) apparatus, a guiding device of the OHT apparatus, and a direction maintaining module of the OHT apparatus are provided. The direction maintaining module includes a main channel, a first retaining channel and a second retaining channel that are spaced apart from the main channel, a switch channel, and a switching mechanism connected to the switch channel. The switch channel is disposed among the main channel, the first channel, and the second channel. The switching mechanism is configured to drive the switch channel to move between a turning position and a straight position. When the switch channel is at the turning position, the switch channel connects the main channel and the first retaining channel. When the switch channel is at the straight position, the switch channel connects the main channel and the second retaining channel.

A self-maintaining crane system including a bridge, a trolley, a hoist, and sensors for use within a hostile environment, such as a wastewater treatment facility, is presented. The bridge is movable along a pair of runway rails within the hostile environment. The trolley is movable between the runway rails. The hoist with extendable-retractable cable is movable with the trolley. Bridge sensors separately determine whether the bridge has engaged a bridge home position and a bridge end position. The bridge is movable away from the bridge home position and back toward the bridge end position. Trolley sensors separately determine whether the trolley has engaged a trolley home position and a trolley end position. The trolley is movable away from the trolley home position and back toward the trolley end position. Hoist sensors separately determine whether the cable has engaged a hoist home position and a hoist end position. The cable is extendable away from the hoist home position and retractable toward the hoist end position. Sensors facilitate automated movement of bridge, trolley, and cable so as to minimize functional impairment of the crane system by the hostile environment.

A self-maintaining crane system including a bridge, a trolley, a hoist, and sensors for use within a hostile environment, such as a wastewater treatment facility, is presented. The bridge is movable along a pair of runway rails within the hostile environment. The trolley is movable between the runway rails. The hoist with extendable-retractable cable is movable with the trolley. Bridge sensors separately determine whether the bridge has engaged a bridge home position and a bridge end position. The bridge is movable away from the bridge home position and back toward the bridge end position. Trolley sensors separately determine whether the trolley has engaged a trolley home position and a trolley end position. The trolley is movable away from the trolley home position and back toward the trolley end position. Hoist sensors separately determine whether the cable has engaged a hoist home position and a hoist end position. The cable is extendable away from the hoist home position and retractable toward the hoist end position. Sensors facilitate automated movement of bridge, trolley, and cable so as to minimize functional impairment of the crane system by the hostile environment.

A self-maintaining crane system including a bridge, a trolley, a hoist, and sensors for use within a hostile environment, such as a wastewater treatment facility, is presented. The bridge is movable along a pair of runway rails within the hostile environment. The trolley is movable between the runway rails. The hoist with extendable-retractable cable is movable with the trolley. Bridge sensors separately determine whether the bridge has engaged a bridge home position and a bridge end position. The bridge is movable away from the bridge home position and back toward the bridge end position. Trolley sensors separately determine whether the trolley has engaged a trolley home position and a trolley end position. The trolley is movable away from the trolley home position and back toward the trolley end position. Hoist sensors separately determine whether the cable has engaged a hoist home position and a hoist end position. The cable is extendable away from the hoist home position and retractable toward the hoist end position. Sensors facilitate automated movement of bridge, trolley, and cable so as to minimize functional impairment of the crane system by the hostile environment.

A self-maintaining crane system including a bridge, a trolley, a hoist, and sensors for use within a hostile environment, such as a wastewater treatment facility, is presented. The bridge is movable along a pair of runway rails within the hostile environment. The trolley is movable between the runway rails. The hoist with extendable-retractable cable is movable with the trolley. Bridge sensors separately determine whether the bridge has engaged a bridge home position and a bridge end position. The bridge is movable away from the bridge home position and back toward the bridge end position. Trolley sensors separately determine whether the trolley has engaged a trolley home position and a trolley end position. The trolley is movable away from the trolley home position and back toward the trolley end position. Hoist sensors separately determine whether the cable has engaged a hoist home position and a hoist end position. The cable is extendable away from the hoist home position and retractable toward the hoist end position. Sensors facilitate automated movement of bridge, trolley, and cable so as to minimize functional impairment of the crane system by the hostile environment.