The present invention relates to a portable power-driven system, such as an ascender/descender arrangement, specifically in relation to means for ensuring that a rope used in relation to the portable power-driven system is securely handled when in the operational state.

A winch is disclosed having a drive cylinder, configured to be rotated by an applied force about its longitudinal axis and having at least three drive grooves. The winch also includes an idler with a longitudinal axis spaced apart from the longitudinal axis of the drive cylinder. A line is fed onto the winch by passing it over a first of the at least three drive grooves then around the idler and then around a second of the at least three drive grooves. The line is attached to one of a fixed object or the object to be moved. The winch is attached to the other of the fixed object or the object to be moved. As the applied force is applied to the drive cylinder, the line is gripped by the at least three drive grooves and a length of the line between the fixed object and the object to be moved is shortened, whereby the object is moved.

A forestry winch that has a rope drum driven by a drive motor and an ejector roller driven by an additional drive motor is disclosed. A rope is guided from the rope drum to the ejector roller and is guided over the ejector roller. The additional drive motor is located on the ejector roller and is connected to an energy supply device by means of energy supply lines. Provided on the ejector roller a protective device, which covers the energy supply lines located in the area of the additional drive motor and protects them from mechanical damage.

A forestry winch may include a rope drum driven by a drive motor, wherein a rope is wound up on the rope drum, wherein the rope drum is functionally connected with a brake device, wherein the brake device is in the form of a spring-loaded brake which is impinged by a spring device toward a braking position and by a hydraulic brake release pressure present in a brake release pressure line toward a release position, wherein the drive motor is in the form of a hydraulic motor which is connected by a first pressure medium line and a second pressure medium line to a multi-port control valve device controlling the drive motor, and a bypass valve device connecting the first and second pressure medium lines and is located in a connecting line connecting the first and second pressure medium lines and has a closed position and a flow position.

The present invention relates to a rope type elevating device, and more particularly, to a rope type elevating device that can mechanically and safely control the falling speed even if a breakage occurs in the brake being electrically controlled during the elevating and descending operation. The rope type lifting device of the present invention comprising an electronic braking device for winding a conveying rope to move the rope up and down by using power, and a mechanical braking device for mechanically moving the conveying rope up and down, characterizes in that the mechanical braking device comprises: an unlocking lever being rotated by an external force within a predetermined rotation range; a connecting portion connected to the unlocking lever and moving forward by a predetermined amount in conjunction with the rotation of the unlocking lever; a rotating body that rotates by the amount of advancement of the connecting portion and adjusts a pressing force applied to the conveying rope; and a stopper for limiting the rotation range of the rotating body and supporting the pressing force applied to the rope by the rotating body.

A drum is rotatably mounted on a carriage. A cable is configured to: transport power, connect with a drum connector disposed on the drum, and connect with an unmanned aerial vehicle (UAV) via a UAV connector. A drum actuator is configured to rotate the drum. A UAV feed is configured to align the cable as it exits the device towards the UAV. A tension sensor is configured to measure a tension of the cable. A controller receive as tension measurement from the tension sensor; and controls the drum actuator to maintain a determined tension on the cable while: dispensing the cable; holding the cable steady; or collecting the cable.

This invention relates to a forestry winch that has a rope drum driven by a drive motor and an ejector roller driven by an additional drive motor, wherein a rope runs from the rope drum to the ejector roller and is guided over the ejector roller. The rope is pressed against the ejector roller by means of a pressing device. The pressing device has at least three pressing elements which are distributed around the periphery of the ejector roller.

The present invention relates to a rope type elevating device, and more particularly, to a rope type elevating device that can mechanically and safely control the falling speed even if a breakage occurs in the brake being electrically controlled during the elevating and descending operation.

The rope type lifting device of the present invention comprising an electronic braking device for winding a conveying rope to move the rope up and down by using power, and a mechanical braking device for mechanically moving the conveying rope up and down, characterizes in that the mechanical braking device comprises: an unlocking lever being rotated by an external force within a predetermined rotation range; a connecting portion connected to the unlocking lever and moving forward by a predetermined amount in conjunction with the rotation of the unlocking lever; a rotating body that rotates by the amount of advancement of the connecting portion and adjusts a pressing force applied to the conveying rope; and a stopper for limiting the rotation range of the rotating body and supporting the pressing force applied to the rope by the rotating body.

A winching apparatus adapted for horizontal rotational mounting behind the chipping feed rollers on a chipping machine. It has a rotatable vertical stanchion, that is pivotally coupled to first end of a horizontal boom arm that may be vertically adjusted between its ends so as to raise or lower its second end. At the second end of the boom arm is a swivel mounted plate that houses a high speed continual line uptake winch that is thus adjustable for simultaneous alignment of the rope puller with the line in both the horizontal and vertical planes. The device is capable of compensating for a constantly changing directional pull as well as feeding the downed foliage directly into the chipper.

A descent assist device for powered ascenders is discussed herein. In one embodiment, the descent assist device can include a base plate having a first guide surface, a capstan peg, a second guide surface, and a retention loop extending from the first guide surface to the second guide surface configured to retain a rope on the descent assist device. Where the angle of wrapping of the rope around the first guide surface and the capstan peg is constant during use and the angle of wrapping of the rope around the second guide surface is adjustable by the user of the device to increase or decrease the frictional drag of the rope.