Abstract: A fall arrest anchor trolley for arresting the fall of a user. In one embodiment, the invention can be a fall arrest trolley comprising: a body a brake sub-system, and a plurality of wheels rotatably coupled to the body, wherein bottoms of the plurality of wheels collectively define a rolling plane; the brake sub-system comprising a brake rod, a brake pad connected to the brake rod, a lanyard connector connected to the brake rod, and a resilient element; the brake rod slidably coupled to the body so that the brake sub-system is alterable between: (1) a free state in which the brake pad is spaced a distance above the rolling plane; and (2) an arrest state in which at least a portion of the brake pad is located within the rolling plane; the resilient element biasing the brake sub-system into the free state.

Abstract: A telescoping bridge crane system arranged to be mounted over a floor of a structure, e.g., a vehicle trailer, and including a pair of enclosed mounting tracks for slidably supporting a runway frame. Trucks are located within the tracks. Each truck includes a hanger. The runway frame also includes two enclosed tracks which are directly supported by the hangers and located beside and parallel to the mounting tracks. A bridge section is mounted between the enclosed tracks of the runway frame by another pair of trucks. The a bridge section supports an extremely low headroom hoist assembly including an actuator, a cable, plural rotatable sheaves and a hook.

Abstract: A telescoping bridge crane system arranged to be mounted over a floor of a structure, e.g., a vehicle trailer. The system includes a pair of enclosed mounting tracks for slidably supporting a runway frame. Trucks are located within the mounting tracks to move therein. Each truck includes a hanger. The runway frame also includes two enclosed tracks which are directly supported by the hangers so that they are located beside and parallel to the mounting tracks. A bridge section is mounted between the enclosed tracks of the runway frame by another pair of trucks.

Abstract: An enclosed track system comprising an enclosed track having at least one curve and a trolley for negotiating the curve. The trolley includes an externally located drive section and a rolling section having first and second roller portions located within the track. The first roller portion includes rollers for rolling on flange portions of the track. The second roller portion includes a yoke-mounted driven wheel and a pair of support rollers. The driven wheel rolls on an inner surface of the top of the track. The pair of support rollers roll on flange portions of the track and are mounting on respective rods for pivoting action about vertical axes. The drive section includes a motor powered driving wheel which extends partially into the track to engage the driven wheel. The drive section also includes an articulated joint coupling the first and second roller portions together.

Abstract: An enclosed track system comprising an enclosed track having at least one curve and a trolley for negotiating the curve. The trolley includes an externally located drive section and a rolling section having first and second roller portions located within the track. The first roller portion includes rollers for rolling on flange portions of the track. The second roller portion includes a yoke-mounted driven wheel and a pair of support rollers. The driven wheel rolls on an inner surface of the top of the track. The pair of support rollers roll on flange portions of the track and are mounting on respective rods for pivoting action about vertical axes. The drive section includes a motor powered driving wheel which extends partially into the track to engage the driven wheel. The drive section also includes an articulated joint coupling the first and second roller portions together.

Abstract: An enclosed track system comprising an enclosed track having at least one curved portion and a trolley including a rolling section having first and second roller portions located within the track and spaced from each other and an externally located drive section. The second roller portion comprises a drive wheel arranged to roll on an inner surface of the track. The drive section has an articulated joint coupling the first and second roller portions to each other. The drive section includes a motor to cause the drive wheel to rotate, whereupon the trolley rolls along the track, with the articulated joint enabling the first and second roller portions to pivot longitudinally with respect to each other so that the trolley can negotiate curves in the track.