A suspension work platform hoist system for raising and lowering a work platform is provided. The system incorporates at least one hoist attached to the work platform and in electrical communication with a hoist control system having a monitoring and diagnostic system to monitor and record at least one of a plurality of operating characteristics of the hoist. The hoist control system may further include a safety lock out system that requires authentication of an operator prior to the hoist control system causing movement of the hoist system.

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 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 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 suspension work platform hoist system for raising and lowering a work platform is provided. The system incorporates at least one hoist attached to the work platform and in electrical communication with a hoist control system having a monitoring and diagnostic system to monitor and record at least one of a plurality of operating characteristics of the hoist. The hoist control system may further include a safety lock out system that requires authentication of an operator prior to the hoist control system causing movement of the hoist system.

A cable drive system having a cable drum housing, a cable drum unit mounted therein for rotation by a drive motor, a first control cable and a second control cable. The first and second control cables are each windably held on the cable drum unit for the purpose of driving the protection device. The first control cable is guided out of a first housing part of the cable drum housing along a first direction, and the second control cable is guided out of a separate, second housing part of the cable drum housing along a second direction. Different mounting positions of the first housing part are provided in which the first housing part is in different rotational positions relative to the second housing part, with the result that the first guidance direction has a different orientation than the second guidance direction in the different mounting positions.

This disclosure relates to an endless cable winch including a drive unit having an engine configured to generate a torque. The endless cable winch further including an output unit connected to the drive unit, the output unit including a power transmission assembly coupled to the drive unit, the power transmission assembly configured to apply a driving force to a cable. The endless cable winch further including a lifting force limiting device configured to stop the drive unit as soon a predetermined driving force is exceeded. In doing so, this system is also transferable to winches with multiple engines. The engine and the output unit can be movable relative to one another, and the lifting force limiting device can be configured to stop the drive unit based on the relative movement of the drive unit and the engine.

The system of the present invention is a tilt over mast that is easy to construct from the ground and permits azimuthal adjustments from the ground with the mast elevated to working heights. The system used for calibrating a directional antenna and includes two or more mast sections, namely a base member, a mid member, and a top member. The mid member may be pivotally coupled about the base member at a number of positions. The top member is coupled to an opposing end of the mid member and supports the desired equipment. A method of constructing and operating the system is described.

A UAV tether management system comprising: a tether-wound spool rotatably mounted on a base station, a free-pivoting angle arm, and an angle arm encoder, wherein the tether is configured to transfer power from the base station to the UAV while the UAV is in flight, and the angle arm comprises a tether guide mounted to a proximal end of the angle arm such that the tether passes through the tether guide as the tether pays out of, or is taken up by, the spool, wherein the angle arm further comprises a counter weight mounted to a distal end of the angle arm such that a center of mass of the angle arm is aligned with the spool's axis of rotation, and wherein the angle arm encoder is configured to measure an offset angle of the angle arm.

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.