Abstract: The present invention discloses a connecting rod type two-level locking device, a hopper car bottom door and a hopper car, and belongs to the technical field of rail wagons. The connecting rod type two-level locking device includes a transmission shaft, a door opening arm, a first roller, a second roller, a first locating pin, a standstill locking disk and a linkage mechanism. The hopper car bottom door includes the connecting rod type two-level locking device. The hopper car includes the bottom door. Even if the connecting rod type two-level locking device is accidentally stressed, the linkage mechanism cannot rotate, and at this time, the slave arm cannot rotate neither. The accidental opening of the hopper car bottom door can be avoided. The hopper car is more reliable to use.

Abstract: A line cart puller for moving a line cart along overhead conductors and past support towers. The line cart puller has a workspace for supporting a user and/or payload therein, and has a drive wheel able to connect to and disconnect from an overhead conductor hi order to reposition the puller around and past a support tower. The puller also has a motor of a hand-operated tool able to removably connect to a transmission system for driving the drive wheel.

Abstract: Disclosed herein is a human powered rail bike. The rail bike includes a chassis having a predetermined shape. Rail wheels comprising a pair of front wheels and rear wheels, roll along two rails of the track which are arranged side by side. A plurality of seats is mounted to the chassis. A one-way clutch capable of changing direction limits the rotating direction of an axle to one direction, that is, a forward direction or a backward direction. A plurality of crank pedals is rotatably mounted to the chassis, and is connected to the one-way clutch capable of changing direction via a chain. A direction conversion lever functions to convert the rotating direction of the one-way clutch. Further, a pair of brake units is provided to reduce the speed of the rail bike or stop the rail bike.

Abstract: Disclosed herein is a human powered rail bike. The rail bike includes a chassis having a predetermined shape. Rail wheels comprising a pair of front wheels and rear wheels, roll along two rails of the track which are arranged side by side. A plurality of seats is mounted to the chassis. A one-way clutch capable of changing direction limits the rotating direction of an axle to one direction, that is, a forward direction or a backward direction. A plurality of crank pedals is rotatably mounted to the chassis, and is connected to the one-way clutch capable of changing direction via a chain. A direction conversion lever functions to convert the rotating direction of the one-way clutch. Further, a pair of brake units is provided to reduce the speed of the rail bike or stop the rail bike.

Abstract: A camera track system comprising a track (100), a camera mounted on a movable truck (102) driven by drive means (104), control means (110) for controlling movement of the truck (102) along the track (100), in which commands between the control means (110) and the truck (102) are effected by means of a flexible link (136) contained within the track (100), allowing remote control of the truck (102). The control means (110) may comprise separate controls for the camera, operated by the hands of the operator, and for the truck, operated by the feet of the operator.

Abstract: A track-traveling four-wheel vehicle is arranged such that pedalling power of a passenger is transmitted to rear wheels as drive wheels through a chain, and the rear wheels and front wheels as driven wheels roll along two rails. The vehicle has: frames constituting a rectangular body; a swing frame arranged such that an L-shaped end portion is pivotally mounted in the middle portion of the rear frame through a vertical shaft and the other L-shaped end portion extends along the longitudinal direction of the body, the swing frame being supported to swing in a horizontal plane; and a driven wheel support frame pivotally supported at the distal end portion of said swing frame. The front frame is slidably supported in the vicinity of the distal end portion of the swing frame through a sliding support mechanism.

Abstract: A self-propelled cycle-type vehicle comprises a drive wheel rotatably supported by the vehicle frame and coupled to the vehicle foot pedals; a planetary wheel of larger diameter than the drive wheel and rotatably supported by the frame around the drive wheel, with the outer face of the drive wheel engageable with and rollable along the inner face of the planetary wheel, the outer face of the planetary wheel being rollable along the surface over which the vehicle is propelled; and a balancing wheel also rotatably supported by the frame and having an outer face rollable along the surface over which the vehicle is propelled.Two embodiments of the invention are described for propelling the vehicle along the ground, and a third embodiment is described for propelling the vehicle along railroad tracks.