Air hoist, particularly adapted for use in a shipyard

A control unit for an air hoist, the air hoist including an air hoist body with a pneumatic motor and a cable or chain for connecting a load, the pneumatic motor having an air intake and an air outlet for respectively letting in and letting out compressed air, the pneumatic motor being adapted to move the cable or chain with respect to the air hoist body, the control unit configured to be connected to the air hoist body and is adapted to guide compressed air to the air inlet of the pneumatic motor of the air hoist, the control unit comprising:

• a control valve arm configured to move from a neutral position to either a first position to allow the pneumatic motor to turn in a first direction or a second position to allow the pneumatic motor to turn in a second direction opposite to the first direction, the control valve arm having a first connector and a second connector to connect respectively a first and a second pull rope to move the control arm to a selected position;
• an air entry and an air filter, wherein the air filter is positioned downstream from the air entry;
• an air filter positioned downstream from the air entry and an air exit, wherein the air exit of the control unit is configured to be connected to the air inlet of the pneumatic motor of the air hoist.