200 results about "Capstan" patented technology

A winch (1), a vehicle including the same and a method of operating associated thereto. The winch (1) is used with a strap (15) for fastening a load onto a transportation vehicle, and comprises a tightening assembly (3) and a gear assembly (5). The tightening assembly (3) comprises a support structure having first and second support flanges (7, 9) and a cross member (11) extending between the flanges (7, 9). The cross member (11) is devised for mounting onto a corresponding side track of the vehicle. The tightening assembly (3) also comprises a tightening reel (13) for receiving a portion of the strap (15) to be tightened about said reel (13), the tightening reel (13) being pivotally mounted onto the first and second support flanges (7,9). The gear assembly (5) is operatively connected to the tightening assembly (3), and comprises a gear (17), a worm (19), and a casing (21). The gear (17) is securely mounted about the tightening reel (13) so as to rotate with said reel (13). The worm (19) is positioned adjacent to the gear the worm (17) is threadedly engaged with the gear (19) so that a rotation of the worm (17) drives the tightening reel (13) via the gear (17), along opposite directions of rotation, for either fastening or unfastening the strap (15) onto the tightening reel (13). Excess portion of the strap 15 may be wound about a winding assembly (27) which is removably mountable onto the tightening assembly (3).

An apparatus for lifting and moving a load. The apparatus comprises a lift frame having a first and second vertical member that are connected so that a working window area is defined. The apparatus further comprises a rotary actuator mounted on the first vertical member, and an arm having a first end and a second end, and wherein the first end of the arm is pivotly connected to the rotary actuator. The arm is pivotal from an area exterior of the working window area to an area within the working window area. The apparatus may further comprise a winch, operatively attached to the arm, for lifting a load with the cable. A method of lifting a load is also disclosed.

A winch (1), a vehicle including the same and a method of operating associated thereto. The winch (1) is used with a strap (15) for fastening a load onto a transportation vehicle, and comprises a tightening assembly (3) and a gear assembly (5). The tightening assembly (3) comprises a support structure having first and second support flanges (7, 9) and a cross member (11) extending between the flanges (7, 9). The cross member (11) is devised for mounting onto a corresponding side track of the vehicle. The tightening assembly (3) also comprises a tightening reel (13) for receiving a portion of the strap (15) to be tightened about said reel (13), the tightening reel (13) being pivotally mounted onto the first and second support flanges (7, 9). The gear assembly (5) is operatively connected to the tightening assembly (3), and comprises a gear (17), a worm (19), and a casing (21). The gear (17) is securely mounted about the tightening reel (13) so as to rotate with said reel (13). The worm (19) is positioned adjacent to the gear (17) and operable between a first configuration where the worm (17) is away from the gear (19), and a second configuration where the worm (17) is threadedly engaged with the gear (19) so that a rotation of the worm (17) drives the tightening reel (13) via the gear (17), along opposite directions of rotation, for either fastening or unfastening the strap (15) onto the tightening reel (13). Excess portion of the strap 15 may be wound about a winding assembly (27) which is removably mountable onto the tightening assembly (3).

Novel and advantageous pipelay reel systems and methods for use in laying flexible or rigid pipe or tubing in on and offshore operations. The pipelay reel system may have a pipelay reel having a drum arranged between two flanges. At least one flange of the reel may have a chute configured to receive an adapter coupled to a starting end of the pipe to be spooled on the reel. An initiation line coupled to a winch and intersecting the flange chute may be used to position the adapter with respect to a receiving end of the flange chute, and the reel may be rotated to pull the adapter down the chute to a latching end of the chute. Moreover, a latch may be used to secure the adapter in the chute such that the pipe may be spooled onto the reel.

The present invention represents a procedure for compensating the heave movement of offshore cranes. The dynamic model of the compensation actuator (hydraulically operated winch) and the load hanging on a rope are derived. Based on this model, a path-tracking control unit is developed. To compensate the movement of the ship / watercraft caused by waves, the heave movement is defined as a time-varying disturbance and is analyzed with respect to uncoupling conditions. With a model expansion, these conditions are satisfied, and an inversion-based uncoupling control law is formulated. To stabilize the system, an observer is used for reconstructing the unknown state by means of a force measurement. Furthermore, the compensation efficiency can be improved by predicting the heave movement. There is proposed a prediction method in which no ship / watercraft models or properties are required. The simulation and measurement results validate the heave compensation method.

The invention provides a marine pipelaying and a method for abandonment of a pipeline. The invention provides a method for installing a pipeline on the seabed from a marine pipelaying vessel, comprising initiation, pipelaying, and abandonment of the pipeline. An embodiment of the abandonment of the pipeline comprises: halting pipelaying and engaging a hang-off clamp (30) with the pipeline at a position below one or more tensioners, transferring the weight onto the hang-off clamp and holding the seagoing pipeline in the firing line, severing the pipeline, connecting the initiation cable (41) to the lower end of the pipeline held by the one or more tensioners, transferring pipeline tension onto the initiation cable, releasing the one or more tensioners, so that a section of the pipeline is held in the firing line between the pipeline diverter (17) and the initiation cable, vacating the firing line by at least displacing both the pipeline diverter and the initiation cable sheave and thereby displacing said section of the pipeline from the firing line, arranging the A& R cable (51) in the firing line, connecting the A & R cable to the upper end of the seagoing pipeline held in the firing line, releasing the hang-off clamp, operating the A& R winch and thereby lowering the pipeline onto the seabed.

The invention relates to a recycling and laying device for a water body profile observation system. The recycling and laying device comprises a tail cable, a tension cable, a fixing piece and a workboat. A winch is arranged on the workboat and used for winding and unwinding the tension cable; the tail cable head is tied on a deck of a buoy body, and a tail cable shackle is buckled on a plastic-coated steel cable and located at the upper end of the plastic-coated steel cable and below an electric swivel and a communicator; the tension cable and the plastic-coated steel cable are arranged in parallel and are fixed through a fixing piece; the tension cable head is bound to the upper portion of the plastic-coated steel cable and located below the tail cable shackle, the length of the tension cable head is redundant, and the redundant length is not smaller than the distance from the fixed water depth position to the winch; and the tension cable shackle is connected with a first connecting piece. The plastic-coated steel cable and water body profile observation equipment can be well protected through the operation mode that the tail cable and the tension cable are combined, labor saving and convenience of field operation can be achieved, safety and reliability are high, and extremely high popularization value is achieved.

A power or manually operated winch mechanism for handling the running rigging lines of a sailing yacht. The winch includes a winding drum, operating in conjunction with a level wind mechanism, which winds and stores the line during line retrieving operations and controllably releases the line when desired. Novel level wind features enable the lines to be appropriately tensioned during retrieval, to assure proper windup of the line in organized coils on the drum. During line release, the line is placed under tension by the level wind mechanism and thus positively drawn from the unwinding winch drum even when the line is not under load from the sail to which it is attached. The arrangement enables lines to be automatically released from one winch and retrieved on a second which, under a common control, as when tacking or resetting the sails of a yacht, all without the necessity of any physical line handling by crew members, resulting in a significant improvement in the safety and convenience of the crew. The new winch mechanism preferably includes a novel alternate arrangement for manual operation of the system in the event of a failure of the power system.

A load lowering descent controller having a fixed cylindrical body or capstan about which a rope or cable is turned. The descent controller allows for lowering of the load at a controlled rate by adjusting the amount of friction between the controller and the rope or cable as a function of rope or cable turning and relative contact with rope or cable engagement surfaces in the controller. The fixed cylindrical body or capstan is surrounded by a vented sleeve to prevent the rope from becoming heated and to prevent the user from being injured.

A system for loading, unloading and carrying a boat, upright with motor, on a vehicle includes a raised carrying rack positioned at an incline above the vehicle and a loading arm extending rearwardly from the back of the vehicle and supported in cantilever fashion by cables. A winch, cable and pulley system pulls the boat out of the water, onto the loading arm, up onto rollers at the rear of the carrying rack, and to the forward end of the carrying rack where it is secured. The loading arm may be folded upright after the boat is loaded on the carrying rack.

A vessel includes a hull with a turret, a cavity in the turret and a mooring buoy releasably attached in the cavity, the buoy including a buoyant body and carrying a number of risers, extending to a subsea hydrocarbon well and a number of anchor lines connected to the sea bed, wherein upon connection of the buoy to the cavity, the buoy is attached to a pulling member connected to a winch on the vessel for lifting of the buoy. Each anchor line and / or riser at its upper end is connected to a stopper member, the stopper member being attached to the pulling member, wherein during lifting, each anchor line and / or riser and the stopper member are movable relative to the buoyant body in a length direction of the anchor lines and / or risers, and wherein after connection of the buoyant body to the cavity, the stopper member is engaged with an abutment member on the buoyant body to support the anchor line and / or riser weight off the body.

The invention discloses an isometric pile driver with adjustable transmission ratio, and particularly relates to the device for driving a punching rod to reciprocate up and down to perform piling through a driving wheel by utilizing a limiting column and a top plate, a capstan also drives a roller with an adjusting mechanism to rotate, the transmission ratio is adjustable, and equidistant piling work of different distances is achieved; and the isometric pile driver effectively solves the problem that an existing pile driver does not have the function of automatically positioning continuous piling. The isometric pile driver comprises a sweep template, a driving motor, the capstan, a piling mechanism, the roller and driving wheels, wherein the drive motor for wire jointing a power supply anda switch is arranged on the sweep template, the capstan is rotationally arranged above the sweep template, the piling mechanism is connected with the capstan, the roller of the capstan is connected through a second transmission piece, and the driving wheels of the roller are connected in an intermittent transmission manner; the piling mechanism comprises the limiting column, a guide groove, the punching rod and a sleeve, the limiting column is fixed to the outer edge of the side face of the capstan, the guide groove embedded with the limiting column is arranged in the top plate, the punchingrod is fixed below the top plate, and the sleeve is combined with the punching rod in a sleeving manner and is fixed on the sweep template. According to the isometric pile driver, and the adjusting mechanism is arranged in the roller.

The invention relates to a steam catapult which is important equipment for the taking off of the carrier aircraft of naval air force from the deck of the carrier. The one-way steam catapult with linear opening cylinder does not adopt the prior U-type-filling sealing technology, but a linear sealing technology with the combination of a composite steel rope and a counter cylinder to dynamically seal an opening steam main cylinder, which removes the defects of short sealing life and large maintenance of the U-type-filling sealing technology. Also, the steam catapult adopts back tracking motor-driven drag technology to realize the one way steam action of the catapult, thereby resolving the detects of large steam consumption of the U-type-filling sealing catapult and saving the valuable fresh water.

A tower may support a horizontal track and a vertical climbing wall therebelow. A trolley, movable along the track, may be selectively driven toward and away from the tower by belay lines, line and capstan, positive drive, or some combination. Belay lines reeved over pulleys on the trolley may be taken up and paid out independently from the trolley, while fixed or moving. A rider may climb, be lifted, or both to near the intersection of the tower and track, from there to fall or jump into a controllable trajectory such as swinging or simulating a parachute landing. Swinging may be rapidly attenuated almost entirely by “bumps,” lifting a rider to remove momentum and kinetic energy as a rider moves toward a pivot point overhead. Control may be simplified based on sensing and using timing past bottom dead center (BDC).

A floating dock mover that utilizes electrically powered devices to aid in relocating a floating dock whenever water levels change in a lake or reservoir. Electrical powered winching mechanisms are used to adjust cables lengths to maintain a position, or aid to obtain a new position of the dock in relation to the shoreline.Additionally, a motorized speed reducer is used to turn the wheels on the dock walkway, which moves the walkway and dock away from, or toward the shore. By electrically powering winch cable lengths, plus electrically powering the walkway wheels, the dock can be relocated horizontally and vertically and maintain a relative desired position in relation to a moving shoreline. An additional electrically motorized unit is used to operate an anchor which aids in maintaining a dock in a desired position.