Abstract: Access equipment including a vehicle (10) on which stands a mast (14) movable between horizontal and vertical positions and mounted for rotation about an axis (13). The mast is telescopically extendible and carries a pivoted boom (17) which is also telescopically extendible and carries a further boom (19) with a working platform (20) thereon. Booms (17, 19) can operate only when the mast (14) is vertical. A cable system maintains platform (20) level for all positions of booms (17, 19) and at least two sets of conduits extend from the vehicle (10) to the platform (20). A take-up system for maintaining the conduits taut is located in casing (54) attached to mast (14) and includes sets of rollers (61 to 69) for supporting the conduits around curved paths and preventing them from becoming entangled.

Abstract: A stabilizing system for a vehicle carrying a load supporting platform (10), to prevent the platform from tilting when the load is unevenly distributed about the longitudinal center line of the vehicle, the system comprising a pair of jacks (17) which are pivotally attached to the platform (10) at the sides thereof outside the adjacent wheels (15). The jacks carry inwardly extending foot plates (18). The jacks are lowered behind the vehicle wheels which are then driven in reverse so that the tires ride up onto the foot plates (18). In this position the jacks extend vertically to the ground and support their associated wheels thus limiting the tilting of the platform (10). A control device (20, 19) is provided to withdraw the jacks to their inoperative positions for travelling upon forward movement of the vehicle. The stabilizing system is self-engaging by reversing the vehicle after releasing the jacks.

Abstract: Access equipment comprising a wheeled vehicle (10) carrying on its chassis a turntable (11) on which is rotatably mounted a supporting structure (12) on which, in turn, is mounted a pair of articulated booms (14,16) having hydraulic actuating rams (20,21) and carrying a personnel platform (18) at the free end of the boom assembly, there being at each end of each boom a guide pulley or half pulley (22,23,24) around which passes a control or support line (26) anchored to the supporting structure (at 27) and to the platform (at 28), the line (26) remaining taut along a path whose length remains constant irrespective of the configuration of the boom assembly.

Abstract: Equipment for cleaning hulls of ships and like surfaces, including a vehicle carrying an articulated boom structure comprising one or more booms connected to the vehicle and rotatable about a turntable thereon, and elevatable relative thereto, the outermost end of the boom structure carrying a frame or the housing which contains a nozzle or like for cleaning or applying coatings to the surface to be treated, the frame or housing including rollers for running along the that surface in contact therewith and the turntable drive being capable of being so rotationally biased that the rollers are positively maintained in engagement with the surface being cleaned.

Abstract: Apparatus enabling access to the interior surfaces bounding a large spaced comprises a pole adapted to extend vertically through the height of the space with its lower end located at the base of the space, at least one boom structure connected with said pole, a working platform connected to the end of said boom structure remote from said pole and the height of said boom structure is adjustable relative to said pole.

Abstract: An hydraulic platform comprises a support structure which mounts a boom assembly comprising a plurality of booms pivotally connected in end-to-end relationship and carrying on its free end a working platform or cage, hydraulic actuator means for pivoting the booms relative to the supporting structure and one another to carry the working platform or cage to a variety of positions remote from the support structure and having a first boom pivotally connected to the support structure, a second boom pivotally connected to the free end of said first boom, first hydraulic cylinder means for effecting pivoting movement of said first boom relative to the support structure between a first inoperative position and a variety of operative positions, second hydraulic cylinder means connected with said second boom for effecting pivoting movement of said second boom relative to said first boom, said hydraulic cylinder means being secured to a member which is pivotally connected with said support structure at a position offse

Abstract: An accessory for converting a crane of the kind having a telescopically extendible jib pivotally connected to a turntable into access equipment comprising a unit to be fitted to the free end of the jib of the crane, a bracket member pivotally connected to said unit for rotation about a horizontal axis, first hydraulic cylinder means extending between said unit and the bracket and capable of being actuated to adjust the orientation of said bracket relative to the jib of the crane, a boom structure pivotally connected relative to said bracket for movement in a vertical plane about a horizontal axis, a working platform or cage pivotally connected to the end of said boom structure remote from said bracket, second hydraulic cylinder means for causing pivotal movement of said boom structure relative to said bracket and means for maintaining said working platform or cage level regardless of the angle of inclination of said boom structure.