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.

The present disclosure describes various systems, devices, and methods configured to retrieve a fixed-wing aircraft from free flight using a flexible capture member and a monopole assembly.

A winch testing device for testing the winch pulling capacity and brake holding capacity of a forestry winch of forestry equipment, in particular of a mobile forestry machine or an accessory rear shield, wherein the forestry winch has a rope drum that can be driven by a drive motor and braked by means of a brake device and on which a rope is spooled. The winch test device has a hydraulic test cylinder which has a first attachment interface, with which the hydraulic test cylinder can be fastened to an attachment point of the forestry equipment, and a second attachment interface with which the hydraulic test cylinder can be connected with the rope of the forestry winch.

The present disclosure relates to a portable device for hoisting/lowering/storing a rope from a tall structure, such as a wind turbine. 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.

A retractable roof for a building having a supporting frame and a high structure extending vertically above the supporting frame. The roof has at least one structure section with first and second panels. The first panel is hingeably mounted on the supporting frame at a proximal hinge and the second panel is hingeably mounted on the first panel at a distal hinge. A distal end of the second panel is suspended to the high structure with a distal cable connected to a distal motorized winch. A tackle member connects to both first and second panels adjacent the proximal hinge and the distal end, respectively, and includes a tackle wire that forms a wire side of a triangular cross-sectional shape with the first and second panels. The tackle wire connects to a winch mechanism to control a length of the wire side.

The removable roof system includes a set of guy ropes (10), each of the guy ropes extending between a top anchor point (2) and a bottom anchor point (3) of a structure to be covered, a velum (1) mobile between a deployed configuration in which the velum covers the structure to be covered and a retracted configuration in which the structure to be covered is uncovered, and a set of carriages (20) to which the velum is attached, arranged so as to be moved along the guy ropes of the set of guy ropes between the top and bottom anchor points in order to cause the velum to pass between its deployed and retracted configurations and comprising for each of the guy ropes of the set of guy ropes at least one motorized carriage, at least one motorized carriage cooperating with the associated guy rope by meshing or by alternating wedging.

A method for mounting or dismounting components of a wind turbine is provided. The mounting or dismounting is accomplished by fastening at least one retaining rope or guide rope to a component to be mounted by fastening the retaining rope or the guide rope to a rope winch unit and by raising or lowering the component to be mounted or to be dismounted by means of a crane. The component to be mounted or to be dismounted is held or guided by means of the retaining rope or guide rope. The rope winch unit comprises a base, a pivot arm and a retaining unit. The pivot arm is pivot-ably coupled to the base at its first end. A rope winch for receiving the retaining rope or guide rope is provided at its second free end. The retaining unit is pivotably coupled to the pivot arm. The base comprises a plurality of latching units for receiving a first end of the retaining unit.

A road barrier transfer machine includes an improved capstan control system that reduces unwanted migration of road barrier spans without requiring inaccurate visual observations and reliance on outdated scripts. The barrier transfer machine includes a moveable chassis, an entry snout, an exit snout, a conveyor system, a capstan system, and the capstan control system. The capstan control system automatically operates the capstan system or provides instructions to an operator of the machine to maintain the tension and compression of a road barrier span within desired ranges to reduce unwanted migration of the span.

A winch for securing a load to a vehicle a is disclosed. The winch includes a mounting bracket with opposed flanges. The winch further includes a drum extending along an axis between a first end and a second end. The drum is mounted relative to the opposed flanges so that the drum is rotatable about its axis. The winch includes a gear received on the drum and a worm configured to mesh with the gear so that a rotation of the worm causes a rotation of the gear. The winch further includes a clutch assembly between the drum and the gear. The clutch assembly is biasable between a first configuration in which the gear is fixed relative to the drum about the axis of the drum and a second configuration in which the gear is rotatable relative to the drum about the axis of the drum.

A fender davit device is disclosed. The fender davit device in accordance with an aspect of the present disclosure includes a fender and a davit comprising a hauling line holding the fender and a winch configured to move the fender by winding or unwinding the hauling line. The fender davit device also includes a hauling line tension maintaining part configured to maintain a tension of the hauling line holding the fender to prevent the hauling line from breaking.