Abstract: A rear gearshift mechanism for installation on a bicycle frame coaxial with a rear-wheel axis has a base element, a pivot mechanism, a movable element and a chain guide. The base element includes an attachment end for installation on the bicycle frame. A first arm and a second arm of the attachment end are arranged spaced apart from one another in an axial direction and, by an associated adapter which has a thread, are configured for the installation of the gearshift mechanism on an associated bracket portion, in particular a dropout or frame hanger. The first arm is arranged on an inner side of the bracket portion, and the second arm is arranged on an outer side of the bracket portion. The base element is designed with a setting device by which the base element can be pivoted in a chain tensioning direction.

Abstract: A crane includes a carrier unit having a chassis, tires connected to the chassis, a carrier deck and outriggers. A superstructure is mounted on the carrier unit, the superstructure includes a telescoping boom. A slope sensor is operably connected to the carrier unit and configured to detect a pitch and/or a roll of the carrier unit during a lift operation. The crane further includes a system for monitoring a load lifted by the telescoping boom. The system is configured to determine the current load lifted by the telescoping boom, receive pitch and/or roll information of the carrier unit from the slope sensor, adjust coordinates of the crane in a coordinate system based on the pitch and/or roll information, determine a transformed operating radius using the adjusted coordinates; and compare the load lifted to a rated capacity at the transformed operating radius.

Abstract: To provide a tensioner capable of preventing slipping between a rack portion and ratchet pawls and securing a large backlash with a simple structure. The tensioner includes a ratchet rotatably mounted on a housing and having a front pawl and a rear pawl spaced apart in a front and rear direction on a side face positioned opposite the rack portion. The ratchet includes an additional pawl formed between the front pawl and the rear pawl in the front and rear direction on the side face positioned opposite the rack portion.

Abstract: A crane, in particular a mobile crane, includes a crane jib which can be moved about a substantially horizontal luffing axis, and a tensioning device for the crane jib. The tensioning device includes two pendants which run from the jib tip to the jib base of the crane jib and tensioning posts each tensioning a respective one of the pendants relative to the crane jib in a triangular configuration. In order to operate the crane, a luffing angle of the crane jib about the luffing axis is measured or recorded, and a spread angle between the tensioning posts while the crane jib is being used is modified depending on the luffing angle.

Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and provided to be embedded in the belt body and to form a helical pattern having a pitch in the belt width direction. When the cord is viewed from a side orthogonal to its length direction, an angle ? of an outermost filament in the filament bundle of the carbon fibers forming the cord with respect to the length direction of the cord is 8° or more to 20° or less.

Abstract: A vehicle crane, such as a mobile crane or a crawler crane, includes a main boom, a main boom extension, and an adapter that is located between the main boom and the main boom extension and which has a first connection plane and a second connection plane. The adapter is configured to be movable such that the first connection plane can be moved relative to the second connection plane, where the adapter is designed in the manner of a double lever in order to provide a vehicle crane that has improved load-bearing capacity and simplified set-up.

Abstract: A method for lubricating a sealed bearing providing a first ring and a second ring capable of rotating concentrically relative to one another, and seals delimiting together with the first and second rings a sealed chamber. The method includes a removing a first predetermined quantity of lubricant from the sealed chamber until the pressure in the sealed chamber reaches a first pressure value, and then injecting a second predetermined quantity of lubricant in the sealed chamber until the pressure in the sealed chamber reaches a second pressure value, the first pressure value and the second pressure value being determined so that the pressure inside the sealed chamber remains within a predetermined interval, the boundaries of the interval being determined according to characteristics of the seals so that the sealed chamber remains waterproof to the lubricant when lubricant is removed from or injected in the sealed chamber.

Abstract: Disclosed herein is an assembly, method of assembling, and kit for assembling an assembled flexible helical belt that is mounted within a mounting space defined by a continuous mechanical constraint of a device. Embodiments of the flexible helical belt include a flexible helical belt that has a plurality of belt teeth, where some of the belt teeth are each pierced by a through hole which extends through the respective belt tooth and where the flexible helical belt is of sufficient length such that, when the flexible helical belt is mounted within the intended mounting space, the flexible helical belt overlaps itself by at least one rotation such that each through hole is transversely aligned with at least one other through hole, enabling a transverse compression device to be fitted through the through holes, creating a transverse compressive force on the flexible helical belt to form a single continuous drive belt.

Abstract: A bicycle rear derailleur comprises a base member, a linkage structure, a movable member, a first pulley assembly, and a second pulley assembly. The first pulley assembly includes a first pulley support and a first toothed pulley. The first pulley support is pivotally coupled to the movable member about a first pivot axis. The first toothed pulley is rotatably coupled to the first pulley support about a first pulley axis spaced apart from the first pivot axis. The second pulley assembly includes a second pulley support, a second toothed pulley, and a third toothed pulley. The second pulley support is pivotally coupled to the movable member about a second pivot axis. The second toothed pulley is rotatably coupled to the second pulley support about a second pulley axis. The third toothed pulley is rotatably coupled to the second pulley support about a third pulley axis.

Abstract: A high rise structure multi-level delivery system comprises a vertical conveyor belt system having a plurality of trays configured to carry a specific delivery parcel to a specific floor of a high rise structure. The conveyor is mounted such that a bottom of the conveyor resides in a ground floor room of the high rise structure and a top resides in a roof room on a roof of the high rise structure. The conveyor is capable of being accessed via an interior room located at each level of the high rise structure.

Abstract: A crane is provided. A slewing base camera detects a load W that is suspended by a wire rope, the current coordinate location of the load is calculated from the location of the detected load, the current coordinate location of a tip end of a boom is calculated from the position of a crane, a target velocity signal that was inputted from a manipulation tool is converted into a target coordinate location of the load, a wire rope direction vector is calculated from the current coordinate location of the load and the target coordinate location of the load, a target location of the tip end of the boom for the target coordinate location of the load is calculated from a wire rope reel-out amount and the wire rope direction vector, and an actuator operation signal is generated.

Abstract: Methods and systems are provided for a fairlead with an illumination module. In one example, a fairlead includes an illumination module seated against a recessed mounting surface. The illumination module is housed within a body of the fairlead and configured to illuminate a main opening of the fairlead.

Abstract: A roll accommodation unit includes: a roll support shaft; a pair of side walls; and a pair of roll bearings that are attached to the pair of side walls, recessed portions are formed at upper ends of the pair of side walls, the pair of rolling bearings are attached to the side walls at positions corresponding to bottoms of the recessed portions such that the rolling bearings project upward beyond inclined surfaces of the recessed portions, the roll support shaft includes a support shaft main body, and a pair of small-diameter portions that are provided at both ends of the support shaft main body, and the roll support shaft is supported with the small-diameter portions abutting on outer circumferential surfaces of the pairs of rolling bearings in a state in which the support shaft main body is located at an interval from the recessed portions.

Abstract: The present disclosure provides for a portable vehicle hardtop removal apparatus for improved vehicle hardtop removal and replacement features in order to efficiently remove and replace hardtops of many types of vehicles, in a safe and convenient manner, for people's enjoyment. The portable vehicle hardtop removal apparatus comprises a upstanding support member removably connected to an upstanding swivel member that is fixed to the horizontal support arm. A lift boom extends from the upstanding support member, and a hoist line extends along the upstanding support member and the lift boom. An elongated spreader tube is connected to a distal end of the hoist line, and a plurality of straps removably connect the elongated spreader tube to a vehicle hardtop for its removal. The lift boom is positionable from a lifting position to a collapsed or folded transport position for efficient transportation of the portable vehicle hardtop removal apparatus to any destination.

Abstract: A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a fan and a braking system. The braking system is configured to selectively engage the fan during ground windmilling to apply a first level of braking to slow rotation of the fan. Further, when the rotation of the fan sufficiently slows, the braking system is further configured to apply a second level of braking more restrictive than the first level of braking.

Abstract: A device for monitoring a lubrication of a tool may include: a housing including: a lubricator connector configured to connect the housing to a lubricator and including a lubricant inlet opening, a chamber configured to receive a lubricant from the lubricator through the lubricant inlet opening, a tool connector configured to connect the housing to a lubricant fitting of a tool and including a lubricator outlet opening through which the lubricant leaves the chamber; and a pressure transducer configured to measure a lubricant pressure in the chamber of the housing and generate an output pressure signal related thereto.

Abstract: A vehicle crane comprising a jib that is raised and lowered by at least one main tensile connector, and a counter jib, where the main tensile connector extends between a first connecting point in the region of a jib head and a second connecting point in the region of a counter jib head. To reduce loading on the jib, in particular during raising and lowering and increase its bearing load overall, the jib has a third connecting point between the first connecting point and its foot opposite the head, and a secondary tensile connector extends between the third connecting point and a fourth connecting point in the region of the head of the counter jib, or the secondary tensile connector extends between the third connecting point via a seventh connecting point on the main tensile connector and a fourth connecting point in the region of the main jib foot.

Abstract: Methods and systems are provided for a tensioning arm. In one example, the tensioning arm comprises a plurality of carbon fibers with electrically conductive fibers arranged therein configured to supply current to a pair of bushings arranged distally to one another to heat lubricant arranged proximally thereto in response to a temperature of the tensioning arm being less than or equal to a threshold temperature.

Abstract: A frictional power transmission belt is provided, containing an adhesion rubber layer in contact with at least a portion of a tension member extending in a longitudinal direction of the belt, in which the adhesion rubber layer is formed of a first vulcanized rubber composition containing a rubber component and a filler, the filler contains substantially no silica and contains 30 parts by mass or more of carbon black based on 100 parts by mass of the rubber component, and the tension member has, on a surface thereof, an overcoat layer formed of a second vulcanized rubber composition containing a rubber component and silica.

Abstract: A tower crane includes a tower on which is pivotally mounted a boom displaceable between a lowered position and a raised position. The crane is configurable between a service configuration in which the boom is controlled in rotation and a weather vane configuration in which the boom is in the raised position and is released in rotation on the tower to allow orientation in the direction of the wind. A wind load system is mounted on the boom and is adjustable between a retracted shape in the service configuration providing a reduced surface exposed to the wind, and a deployed shape in the weather vane configuration providing an extended surface exposed to the wind. The wind load system is configured to move from the retracted shape to the deployed shape under the effect of its own weight alone (i.e., under gravity) when the boom is raised.