A fender mounted hoist has a frame having lifting points for receiving one or more ratchets. The frame is mounted over a fender well. The fender well includes a right fender well and a left fender well. The right fender well includes a right fender well inside frame, a right fender well base, and a right fender well wall. The left fender well includes a left fender well inside frame, a left fender well base, and a left fender well wall. A main beam has a left end of the main beam and a right end of the main beam. The main beam of the frame is horizontally oriented. A left leg is connected to the frame at the left end of the main beam, and a right leg is connected to the frame at the right end of the main beam.

A fender mounted hoist has a frame having lifting points for receiving one or more ratchets. The frame is mounted over a fender well. The fender well includes a right fender well and a left fender well. The right fender well includes a right fender well inside frame, a right fender well base, and a right fender well wall. The left fender well includes a left fender well inside frame, a left fender well base, and a left fender well wall. A main beam has a left end of the main beam and a right end of the main beam. The main beam of the frame is horizontally oriented. A left leg is connected to the frame at the left end of the main beam, and a right leg is connected to the frame at the right end of the main beam.

A portal gantry crane including: two parallel main girders running side by side on respective sides of a midplane, two legs each positioned in the midplane, two couples of trolleys, each couple of trolleys operating on a corresponding girder, each trolley carrying a hoist.

A portal gantry crane including: two parallel main girders running side by side on respective sides of a midplane, two legs each positioned in the midplane, two couples of trolleys, each couple of trolleys operating on a corresponding girder, each trolley carrying a hoist.

A hoist for removing an object to enable an individual to work on the object includes a first substantially vertical support mounted on a floor surface. A second substantially vertical support mounted on the floor surface and being spaced a predetermined distance away from the first substantially vertical support. The first and second substantially vertical supports include an upper surface. A substantially horizontal member extending across the upper surfaces of the first and second substantially vertical supports. A first vertical lift is operatively positioned within the first substantially vertical support. A second vertical lift is operatively positioned within the second substantially vertical support. The first and second vertical lifts selectively raising the member relative to the floor surface. A winch is operatively mounted on the substantially horizontal member for lifting the object relative to the member for enabling an individual to work on the object.

A vertical lifting device and method are provided. The vertical lifting device includes a fixed frame fixed to a foundation. A first cavity allowing passage of a lifting rope is provided in the middle of the fixed frame. A sliding frame moving horizontally on the fixed frame is arranged above the fixed frame. A second cavity allowing passage of the lifting rope is provided in the middle of the sliding frame. At least two stepping vehicles alternately lowering or lifting weights are arranged on the sliding frame and move on the sliding frame. The stepping vehicles are spaced in preset distances. The lifting rope penetrates through the stepping vehicles in sequence. Each stepping vehicle is provided with a clamping part clamping the lifting rope and a driving mechanism driving the stepping vehicle to move on the sliding frame.

A vertical lifting device and method are provided. The vertical lifting device includes a fixed frame fixed to a foundation. A first cavity allowing passage of a lifting rope is provided in the middle of the fixed frame. A sliding frame moving horizontally on the fixed frame is arranged above the fixed frame. A second cavity allowing passage of the lifting rope is provided in the middle of the sliding frame. At least two stepping vehicles alternately lowering or lifting weights are arranged on the sliding frame and move on the sliding frame. The stepping vehicles are spaced in preset distances. The lifting rope penetrates through the stepping vehicles in sequence. Each stepping vehicle is provided with a clamping part clamping the lifting rope and a driving mechanism driving the stepping vehicle to move on the sliding frame.

The present disclosure provides an aircraft security door as well as methods, systems and apparatus for handling an aircraft security door. In one implementation, a method for installing an aircraft security door onto an aircraft is disclosed. The method includes transferring the aircraft security door to an aircraft service stair, supporting the aircraft security door by a bridge crane coupled to the aircraft service stair, positioning the aircraft service stair in proximity to a fuselage of the aircraft adjacent to an opening in the fuselage, positioning the aircraft security door relative to the opening using the bridge crane, and securing the aircraft security door to the opening.

The invention discloses a mining crane which is easy to install, and includes a base which is symmetrical in front and back. A support column is fixed on the upper end surface of the base, and a fixed block is fixed on the upper end of the support column. The fixed block, the support column and A traveling device is arranged between the bases, and the traveling device includes four rotatable traveling wheels. When the traveling wheels rotate, the fixed block is moved, and a lifting device is provided in the fixed block. The heavy device includes a rewindable hook for lifting the heavy ore. The traveling device can drive the whole to adjust the installation position through the traveling device. The device has two installation and support methods that can directly abut the mine wall and drill into the mine wall. According to the actual situation of the mine and mining area, it can be reasonably selected to expand its scope of application, without being restricted by the region. Secondly, the support rod and telescopic rod can be contracted and rotated to reduce the overall volume of the present invention, which is convenient for movement and handling, and convenient for loading and unloading.

The invention discloses a mining crane which is easy to install, and includes a base which is symmetrical in front and back. A support column is fixed on the upper end surface of the base, and a fixed block is fixed on the upper end of the support column. The fixed block, the support column and A traveling device is arranged between the bases, and the traveling device includes four rotatable traveling wheels. When the traveling wheels rotate, the fixed block is moved, and a lifting device is provided in the fixed block. The heavy device includes a rewindable hook for lifting the heavy ore. The traveling device can drive the whole to adjust the installation position through the traveling device. The device has two installation and support methods that can directly abut the mine wall and drill into the mine wall. According to the actual situation of the mine and mining area, it can be reasonably selected to expand its scope of application, without being restricted by the region. Secondly, the support rod and telescopic rod can be contracted and rotated to reduce the overall volume of the present invention, which is convenient for movement and handling, and convenient for loading and unloading.