Abstract: A traverse actuating and gripping system configured to move a catwalk relative to a support structure. The system includes a body, an upper gripping pad coupled to the body and configured to contact a side of a support member of the support structure, a lower gripping pad coupled to the body and configured to contact an opposing side of the support member, and an actuator coupled to at least one of the gripping pads and configured to move the gripping pads between a gripping position that grips the support member and an open position that spaces one of the gripping pads away from the support member.

Abstract: A cable pulling apparatus for pulling a work load attached to a cable, including at least one cable-pulling device for engaging the cable. The cable-pulling device or devices each includes at least one cable-pulling member fitted with a cable-gripping element for pulling the cable and the workload.

Abstract: A locking device installed in a cargo support to lock a retractable tube, including a holder frame fastened to the outer tube of the retractable tube, a rack moved in a longitudinal sliding way defined between two parallel lugs of the holder frame, a driving lever pivoted to the holder frame for moving the rack, and a locking block pivoted to the holder frame and retained by a spring to lock the driving lever, wherein a L-shaped locating plate is mounted in the holder frame for the positioning of the outer tube of the retractable tube, having a round hole on a transverse section thereof through which the inner tube is inserted into the outer tube, two stop flanges bilaterally extended from a longitudinal section thereof and respectively engaged with respective end notches on the holder frame, and a lug extended from one stop flange and fastened to a lug at the holder frame; the holder frame and the locking block are respectively made of iron.

Abstract: An apparatus for moving a movable assembly along a mast is provided. The movable assembly has a bore adapted to receive the mast passing through it. The movable assembly has a release and retain mechanism; a uni-directional drive mechanism; and a switching mechanism for engaging the uni-directional drive mechanism. The switching mechanism has a shaft positioned within the movable assembly, generally oriented parallel to the bore, that is capable of rotational movement around the longitudinal axis of the shaft and axial movement along the longitudinal axis of the shaft. The switching mechanism also has a drive pin attached to the shaft of the switching mechanism that is oriented generally perpendicular to the longitudinal axis of the shaft. The switching mechanism also has a mechanism for affecting the axial movement of the shaft that is preferably in the form of a cam. The release and retain mechanism has a biased release lever defining a slot that is sized to receive the mast.

Abstract: Motive power device for a delivery device located at the base of an upright silo in the shape of a worm screw rotatable about its longitudinal axis, which is swivelable around a central bearing across a circular annularly shaped bottom surface of the silo with the help of a step motor, which consists of two identically designed shoe brakes self-locking counter to the drive direction and engaging at an abutment assigned to the silo wall, of which the one is linked rigidly and the other one displaceably through a controllable power cylinder in the area of a support bearing of the worm and cooperates with the abutment located at the silo wall.

Abstract: An arrangement for raising and lowering a floating offshore platform having legs which are movable relatively to the platform. The legs, in the operating condition, are supported on the bottom of the sea, and a jacking device is blocked against downward movement whenever the floating platform is at a highest point of sea wave motion in a touched-down position of the legs. The jacking device may be in the form of rope winches, with the drive of one jacking device being switched off and the rope winch of the other jacking device being released in take-up direction, while being blockable in payout direction in touched-down position of the legs.

Abstract: A wall lifter able to be made to climb a column to lift a prefabricated wall into a predetermined position. The lifter comprises a first sleeve to surround the column. A saddle engages the wall. The saddle extends forwardly of the first sleeve and is mounted on the sleeve. A lever is pivotably mounted on the first sleeve adjacent the saddle. There is a fulcrum point for the first lever. A second sleeve surrounds the column and is disposed above the first sleeve when the lifter is in its useful position. There is a link between the second sleeve and the lever, pivotably connected to both. A resilient member urges the lever upwardly. The lifter is easy to use and to make and relatively cheap.

Abstract: Gripping and skidding device for skidding modules placed on the platform of a marine drilling rig by a crane. The apparatus is arranged to hydraulically engage the top plate of a girder by at least two opposed gripping units each having gripping faces relatively narrow and short relative to the top plate, and preferably one of which is formed by the surface of a gripping beam mounted for pivoting movement on a universal hinge, thereby ensuring, among other advantages, optimum clamping capacity even if the top plate is warped.

Abstract: An offshore lift platform comprises a platform proper with a plurality of pport legs arranged shiftable. Each leg is retained through the intermediary of latch hole rows arranged in horizontal and vertical spacings and advance means climbing in increments in that at the platform in the spacing of the latch hole rows upper and lower latches are arranged above one another. The lower latches are stationarily positioned at the platform. The upper latches are arranged height-adjustable relative to the platform via a positioner and are interconnected via a ring. The ring is formed by individual segment-like ring portions which are pivotally connected to one another. Each ring portion receives an upper latch. The lower latches are arranged height-adjustable via positioners.

Abstract: A wall lifter able to be made to climb a column to lift a prefabricated wall into a predetermined position. The lifter comprises a first sleeve to surround the column. A saddle engages the wall. The saddle extends forwardly of the first sleeve and is pivotably mounted. A first lever is pivotably mounted on the first sleeve adjacent the saddle. There is a fulcrum point for the first lever. A second sleeve surrounds the column and is disposed above the first sleeve when the lifter is in its useful position. A second lever extends from the second sleeve to permit tilting of the second sleeve on the column. There is a link between the first and second sleeves, pivotably connected to each sleeve. The lifter is easy to use and to make and relatively cheap.

Abstract: A cable hauling device comprises an attachment hook and clamp jaws mounted on blocks, said clamp jaws being movable in opposite directions by means of two oscillatable rocking arms in order to be clamped alternately on the cable to pull it through the device. The clamp jaws may be released from the clamping position by a lever mechanism having a control lever which is locked against release by a lock pawl when a suspension device is inserted into the attachment hook. An actuating lever having a weakened portion at its lower end may be slipped on one or the other rocking arm.