An improved pulley for winch is described, in contact with at least one section of rope included between an inlet section, connected to a working load, and an outlet section, with minimum or null tension, such pulley comprising a kinematic chain composed of peripheral supports.

A tree section lowering assembly is provided. The tree section lowering assembly includes a support member having a first side, an opposing second side, a first end, and an opposing second end. A plurality of rung members extend from the first side of the support member. Each of the plurality of rung members has an outer surface configured to facilitate a frictional, sliding engagement with an interlaced rigging line. A reinforcement member extends from the second side of the support member and is configured to structurally support the support member. An upper line guide extends from a rung member at the located first end of the support member and a lower line guide extends from a different rung member located at the second end of the support member.

An external capstan winch for a closed-loop halyard is provided. The external capstan winch enables the closed loop halyard whose ends are interconnected by a tension device facilitating positive raising and lowering of the an object attached to the halyard. The external capstan winch includes a drive/latching assembly for selectively raising and lowering the flag connected to the halyard without the need for weights. The external capstan winch provides a spool with peripheral cleats for grabbing the halyard as the capstan spool revolves relative to its winch, preventing the halyard from getting twisted and tangled, and as a corollary eliminating the need for a cleat halyard system.

A portable device for hoisting/lowering/storing a rope from a tall structure, such as a is described. The device is formed of an assembly of a rope storage container and a rope driver reversibly connected thereto. The rope storage container defines a rope storage volume bound between a bottom surface and an outer side wall. The rope driver is reversibly connectable to the container and comprises a rope passage having a dimension matching a diameter of the rope. The passage is formed between a pair of adjacent rollers or between a drive coil and a clamp. The rope is driven (hoisted and stored or provided and lowered) by an electric motor arranged to drive at least one of the rollers or the drive coil.

The present invention relates to a rope grab arrangement comprising a rope grab for advancing a rope, the rope grab arrangement being configured to provide an increased friction between the rope grab and the rope for allowing use of multitude of different types of ropes. The invention also relates to a portable power driven arrangement comprising such a rope grab arrangement.

The present disclosure relates to a portable power-driven system for advancing a rope, wherein the portable power-driven system is provided with a specifically designed dual-function cover member provided for improving operational safety of the portable power-driven system.

A transfer device for limiting a twisting of a link between an end of the fixed link with respect to a fixed part and an end of the fixed link with respect to a revolving part that can revolve with respect to the fixed part about an axis of rotation, the transfer device for a link includes a composite drum comprising a set of drums aligned on the axis of rotation about which the link can be wound, the set of drums comprising a fixed drum intended to be secured to the fixed part in rotation about the axis of rotation, a revolving drum intended to be able to revolve about the axis x with respect to the fixed part and a set of at least one loose drum interposed between the fixed drum and the revolving drum, each loose drum being free to rotate about the axis of rotation with respect to the revolving drum and the fixed drum and having a height on the axis.