A self-aligning apparatus for a lifting system includes a structure which includes a first element having a first projecting free end and a second projecting free end which each receive at least one sheave at a point of attachment to the first element, and at least two first points of rotation. The at least one sheave cooperates with at least one wire. The at least two first points of rotation are arranged above the at least one sheave's point of attachment to the first element so that the apparatus self-aligns during use in an uneven loading event.

A rigging assembly has no loose parts that an up-rigger may drop. The rigging assembly includes a length of steel cable terminating in a loop at each end. One loop extends through an oblong master link, while the other loop extends through a swivel hook. The ground-rigger can attach the hook of a hoist's chain to the master link on the ground. The ground-rigger can then tie the up-rigger's rope onto the master link. The up-rigger then pulls the rigging assembly and the hoist's chain up to the beam, leaving the master link and chain under the beam. Then the up-rigger grabs the hook end of the rigging basket assembly, bends it over the beam, and attaches the swivel hook end to the master link, thus creating a loop around the beam to support the hoist's chain and load, which is known in the industry as creating a basket.

An apparatus for use in rigging stages includes a portable bar sized to extend across standard widths of a tower or a cross beam with a portion extending beyond the side of the tower or beam. A lifting mechanism, such as a block-and-tackle, is attached to the portion to allow a rigger to raise or lower heavy objects. In a method of use, a rigger carries the lifting bar to a desired location on a tower or beam and secures at least one end of the portable bar to one or more cross bars. Then the rigger can raise or lower heavy objects by attaching a flexible line from the lifting mechanism to the object and manipulating the lifting mechanism to assist in moving the heavy object to a desired location.

The present disclosure discloses a system for raising from and lowering to the ground level a component of a wind turbine to and from a nacelle mounted on a tower. The system includes a winch system which is disposed on ground in the vicinity of the tower, a first pulley which is fitted at the base of the tower, a derrick structure which is fitted in the nacelle, a pulley system, a jig and a rope. The pulley system includes a set of fixed pulleys fitted to derrick structure and a set of movable pulleys fitted to fixed pulleys and is also coupled to the jig which holds the component. The rope is wound in the winch system and coiled around the first pulley, the set of fixed pulleys and movable pulleys and secured in a securing element fixed to the derrick structure proximal to the set of fixed pulleys.

A jack lift device for lifting and positioning loads includes a tube, a pipe and a hoist. The tube is configured to insert into a hole in a top of a step ladder. The tube is configured to couple to the step ladder so that the tube is positioned substantially vertically. The pipe is complementary to and selectively slidably positionable within the tube. A plate is coupled to and extends perpendicularly from an upper end of the pipe. A hoist is coupled to the tube and operationally coupled to the pipe. The plate is configured to position a load, such as a metal conduit. The hoist is positioned to selectively compel the pipe vertically through the tube so that the load that is positioned on the plate is positioned at a desired height, such as proximate to a joist to which the metal conduit is to be is coupled.

The present invention relates to an automotive recovery coupler for coupling a shackle to a winch line. The coupler includes a receiver for receiving the fastened shackle, and a guide for guiding the winch line. The receiver is typically annular in shape and the winch line passes through the shackle. The coupler may or may not include moving parts.

A device for supporting a cable of a capstan of a crane includes a main supporting structure; a pulley rotatably supported by the main supporting structure, adapted to guide the cable of the capstan; and a sensor for measuring the angular position of the pulley. The pulley includes an auxiliary crown having a plurality of projecting elements disposed along the circumference thereof, and the sensor includes a stationary body integral with the main supporting structure and a wheel rotatable with respect to the stationary body, including a deformable crown meshing with the auxiliary crown of the pulley and made of a material such to deform due to the engagement of the projecting elements, wherein the sensor further includes means for detecting the angular position of the wheel with respect to the stationary body of the sensor.

A pulley block that includes a first side plate, a second side plate and an axle received in the first side plate and the second side plate. The axle is fixed with the first side plate and in a floating relationship with the second side plate such that the second side plate is retained on the axle and capable of rotating around the axle. The axle defines a central opening configured for receiving a soft shackle and a pulley supported on the axle between the first side plate and the second side plate in a longitudinal direction of the axle. The pulley is configured for receiving a winch line around an outer perimeter thereof. Also a method of installing a winch line on such a pulley block.

A self-aligning apparatus for a lifting system includes a structure which includes a first element having a first projecting free end and a second projecting free end which each receive at least one sheave at a point of attachment to the first element, and at least two first points of rotation. The at least one sheave cooperates with at least one wire. The at least two first points of rotation are arranged above the at least one sheave's point of attachment to the first element so that the apparatus self-aligns during use in an uneven loading event.

A cable follower is disclosed herein. The cable follower includes a lever having a first end and a second end, a pivot point disposed at the first end of the lever, the lever configured to rotate about the pivot point, a spring housing disposed at the second end of the lever, a spring disposed in the spring housing, a button disposed in the spring housing and adjacent the spring, and a crowder coupled to the lever at a pivot point between the first end and the second of the lever, the crowder including a wheel.