10168results about "Winding mechanisms" patented technology

A rope tensioner sets the tension of a rope operated switch assembly actuable to switch between first and second conditions on a change in tension of the rope. The tensioner comprises a body, a rotatable member which engages the rope, a shaft for rotating the member relative to the body to adjust tension in the rope by winding the rope around the member, and a lock to lock the member in position relative to the body. The rope opperated switch assembly is much simpler to install than previous assemblies, as the tensioner may be simply threaded or otherwise installed onto the rope without the rope having to be cut.

An electronic winch monitoring system for a winch having a fixed-ratio gearbox with input and output shafts, a winch drum connected to the output shaft, and an auxiliary brake connected to the output shaft activated by reducing the pressure in a brake release hydraulic circuit. The system comprises an input shaft speed sensor, an output shaft speed sensor, and an electronic control unit having a monitoring section and a brake control section. The monitoring section receives the speed signals, processes them to produce a calculated ratio of actual input to output shaft speeds, and produces a fault indication signal when the value of the difference between the calculated speed ratio and the fixed ratio exceeds a predetermined value. The brake control section, upon receiving the fault signal, reduces the hydraulic pressure in the brake circuit using a nonlinear pressure-time profile to engage the auxiliary brake and stop the winch drum.

A combination descender, pulley, and force limiting rope brake for rope rescue has a supporting plate having a one-way pulley sheave rotatably mounted thereto for free-wheeling rotation of the sheave in only a first rotational direction. A fixed brake member is mounted rigidly to the supporting plate. A movable brake member is pivotally mounted to the supporting plate. A pinching opening is defined by the gap. The rope passes in a first direction through the gap when the sheave is free-wheeling in the first rotational direction. The movable brake member translates relative to the fixed brake member in cooperation with rotation of the sheave. Rotation-under-load of the sheave in an opposite rotational direction urges translation of the movable brake member towards the fixed brake member from an open position, wherein the pinching opening is open sufficiently to allow the rope to freely pass therethrough, to a closed position wherein the movable brake member closes the pinching opening so as to frictionally pinch the rope at a preset minimum opening of the pinching opening.

The present invention provides a wind-turbine rotor-blade hoisting apparatus that enables attachment and removal of wind-turbine rotor blades without using a plurality of heavy machines and that enables attachment and removal of wind-turbine rotor blades on a site having a complex land shape with little flat land, a method for attaching a wind-turbine rotor blade, and a method for constructing a wind power generator. The present invention is characterized in that it includes a sheave (14) that guides a hoisting wire (17) from a rotor head (4), to which a wind-turbine rotor blade (6) is to be attached, toward the wind-turbine rotor blade (6) and that is arranged so as to be movable in a direction along the rotation axis of the rotor head (4); a retaining portion (15) that retains an attaching end of the wind-turbine rotor blade (6) such that a line connecting the center of gravity of the wind-turbine rotor blade (6) and a connecting portion, to which the hoisting wire (17) is connected, crosses the longitudinal axis of the wind-turbine rotor blade (6); and a winch (12) that is disposed on the ground and that draws the hoisting wire (17) to wind up or let out the retaining portion (15).

A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up maintains a predetermined fleet angle between a take off point from the drum and the head block.

A gear bearing drive provides a compact mechanism that operates as an actuator providing torque and as a joint providing support. The drive includes a gear arrangement integrating an external rotor DC motor within a sun gear. Locking surfaces maintain the components of the drive in alignment and provide support for axial loads and moments. The gear bearing drive has a variety of applications, including as a joint in robotic arms and prosthetic limbs.

A wind turbine has a nacelle frame and a first hoist substantially permanently mounted on the frame. The method comprises the processes of hoisting a second, more powerful hoist and crane on the frame with the first hoist; removably mounting the second hoist and the crane on the nacelle frame; hoisting a winch using the second hoist and the crane on the frame, and removably mounting the winch on said frame; performing operations involving handling heavy parts employing said winch; and removing and lowering said winch, crane, and second hoist from the frame.

An application includes a plurality of features. A transaction is engaged with a retailer to obtain a product license corresponding to the application. The product license defines at least one feature of the application that may be employed. A base copy of the application is obtained from a distributor and is actuated. A use license corresponding to the product license is acquired from a licensor by way of the actuated application sending the product license to the licensor along with an identification of at least one of a user, the computing device, and a trusted component operating on the computing device, where the use license includes feature policy granting rights to employ each feature defined in the product license.

A hoisting device can be small-sized and energy can be saved. A hoisting device 10 according to the present invention has a hoist 30 and a control unit 32. The hoist 30 rotates a drum 12 having a wire 14 wound thereon by an oil pressure motor 42 rotatable in normal and reverse directions. To the oil pressure motor 42, operating oil is supplied from an oil pressure pump 44. The oil pressure pump 44 is a two-way discharge fixed capacity type, and rotated by a servomotor 46. An acceleration/displacement transducer 34 in the control unit 32 finds a moving direction and a moving speed of a wire hanging point in the vertical direction from an output signal of an acceleration sensor 24. The control unit 32 outputs a drive control signal of the servomotor 46 according to a paying-out speed or a rolling-up speed of the wire 14 offsetting the vertical motion of the wire hanging point caused by the heaving of a hull based on a speed instruction Vi of the paying-out or rolling-up speed of the wire, a detected signal of the acceleration sensor 24 and a detected signal of a wire speed sensor 26.

A chain hoist having a casing into which and with respect to which a chain travels is provided with an externally mounted position encoder assembly. A releasable connector, such as a ratchet strap, is employed to firmly but removably couple the position encoder assembly housing externally on the chain hoist casing. The releasable connector holds the position encoder assembly housing in a fixed position relative to the chain hoist casing. The position encoder assembly has a chain gear that is rotatably mounted relative to the position encoder assembly housing proximate to the chain access opening in the chain hoist casing. The precision encoder assembly chain gear engages the portion of the chain that is maintained under tension at a location externally of the chain hoist casing and rotates as the chain travels relative to the chain hoist casing. A releasable clamp is anchored relative to the position encoder assembly housing and is engageable to maintain engagement of the position encoder assembly chain gear with the chain. An encoder is mounted with respect to the position encoder assembly housing and detects rotational movement of the position encoder assembly chain gear. The sensor provides electrical output signals indicative of the extent and direction of rotational movement of the position encoder assembly chain gear. The position encoder assembly provides precise, reliable output signals indicative of the position of the chain relative to the chain hoist. The position encoder assembly may be readily removed from the chain hoist, and just as easily attached thereto.

The invention is a hoist system for use on a drilling rig made of a tubular mast with a front, back, and top side, a splittable block connected to the mast top side, a trolley with a trolley top and bottom side, wherein the trolley's top side is connected to the splittable block and wherein the trolley is removably secured on the mast's front side, a gripper connected to the trolley bottom side for gripping a load, a hoist cable passing through the splittable block and connected on one end to a hoist cable winch, and a hoist cable winch adapted to pull the hoist cable over the mast top side and through the splittable block to move the trolley relative to the tubular mast and lift the load.

An electrically-powered service rig utilizes an engine-driven generator to power a propulsion system, a drawworks system and a sandline system, all mounted on a single mobile platform. The rig utilizes lightweight permanent magnet motors to enable integration of the systems onto a single mobile platform which meets transport regulations. The rig's power plant is capable of powering other on-site equipment such as mud pump motors through use of umbilicals connected to the engine-driven generator.

A measuring cable travel sensor includes a housing and a cable drum which is arranged in the housing rotatably and longitudinally displaceably in the longitudinal direction of the travel sensor. The measuring cable is guided into and out of the housing through a stationary cable guide. The travel sensor has a longitudinal drive for displacing the cable drum, including a spindle drive comprising a screwthreaded spindle and a spindle nut screwable thereon. The longitudinal drive has an additional transmission for transmitting rotary movement of the cable drum to the spindle drive for producing cable drum displacement.