A double-reeved lifting device includes a lower reeve block secured to a lifting hook and an upper reeve block, wherein the two reeve blocks include reversible connection means adapted to be reversibly configured between a connected configuration and a disconnected configuration. The reversible connection means include a locking mechanism and a complementary locking structure having a frame securely supporting a bolt. The locking mechanism includes a chassis having a locking channel provided with a mouthpiece through which the bolt is configured to enter and exit and slide in the locking channel respectively upon a relative approach or distancing between the two reeve blocks, and at least one latch pivotally mounted on the chassis so as to pivot inside the locking channel, the latch provided with a free end adapted to engage with the bolt.

A solar array lifting assembly and method. The device and method use a support pole, a pole bracket for supporting a solar array made up of a frame and solar panels, a pole bracket securing mechanism for securing the pole bracket at a predetermined height, and a lifting assembly for lifting the pole bracket and solar array along the support pole.

A solar array lifting assembly and method. The device and method use a support pole, a pole bracket for supporting a solar array made up of a frame and solar panels, a pole bracket securing mechanism for securing the pole bracket at a predetermined height, and a lifting assembly for lifting the pole bracket and solar array along the support pole.

Embodiments of the present disclosure describe methods and apparatuses for a load lifting system.

Embodiments of the present disclosure describe methods and apparatuses for a load lifting system.

A rope grab device for a portable power driven system adapted for advancing a rope includes an essentially circular rope grab, wherein the rope grab is adapted to, during operation, engage the rope along at least a section of a circumference of the rope grab. The rope grab device also includes a securing device comprising a leaver portion, a first roller arranged at one end of the leaver portion for guiding an unloaded end of the rope and an anchoring point arranged at the opposite end of the leaver portion adapted for receiving an anchoring force from a load connectable to the portable power driven system. The leaver portion is attached with a hinged connection arranged between the one end and the opposite end to the rope grab device and is adapted to, by means of the first roller, exert a pressure to the rope for forcing the roped towards the rope grab at a portion of the section where the rope, during operation, is engaging the rope grab upon applying the anchoring force on the anchoring point.

A rope grab device for a portable power driven system adapted for advancing a rope includes an essentially circular rope grab, wherein the rope grab is adapted to, during operation, engage the rope along at least a section of a circumference of the rope grab. The rope grab device also includes a securing device comprising a leaver portion, a first roller arranged at one end of the leaver portion for guiding an unloaded end of the rope and an anchoring point arranged at the opposite end of the leaver portion adapted for receiving an anchoring force from a load connectable to the portable power driven system. The leaver portion is attached with a hinged connection arranged between the one end and the opposite end to the rope grab device and is adapted to, by means of the first roller, exert a pressure to the rope for forcing the roped towards the rope grab at a portion of the section where the rope, during operation, is engaging the rope grab upon applying the anchoring force on the anchoring point.

Flat belt apparatuses and methods are provided where one or more cords in the flat belt are tensioned or pre-tensioned to extend the service life of the flat belt.

A pulley block is disclosed. The pulley block comprises: first and second plates and a pulley sheave disposed between the plates for rotation on bearings upon a sheave axle that extends between the plates along a sheave axis. The plates are connected to the sheave axle so as to permit rotation of one plate with respect to the other about the sheave axis between a closed position of the pulley block and an open position of the pulley block. Each plate has, at a position remote from the sheave axis, a respective bollard formation, which bollard formations are disposed such that, when the plates are in the closed position, the respective bollard formations are in contact with or in close proximity to one another to form a bollard that extends between the plates. When the plates are in the open position, the respective bollard formations are spaced apart. The pulley sheave rotates on bearings upon a sheave axle assembly that extends between the plates along a sheave axis. Which assembly has a main axle that is fixed for rotation with respect to the first plate and free for rotation with respect to the second plate and an axle cap that clamps the main axle to the first plate, the axle cap being removably secured to the main axle.

A portable winch and method of use is shown. One advantage of winches shown includes an ability to lower a boom or boom sections into limited access exit pit for winching operations such as pipe bursting. Sectional boom designs shown provide the ability to easily raise and lower a boom large distances without the need for a single long boom. Selected winch designs shown include flexible inserts between the boom and the winch frame that help resist damage from unforeseen shifting of the device during operation. Designs and methods shown also include multiple pulleys on a boom end unit. Fasteners are shown that reduce build up of debris.