Articulated connectors are attached to and extend from center sills of adjacent car units of a multi-unit railroad freight car, connecting the car units to each other and to a shared truck. The center sill of each of the car units includes a top member that is of increased thickness at the outer end of the center sill. A weld extending along a shoulder that extends around the main body of s portion of the articulated connector attaches the articulated connector portion to the outer end of the center sill with ample strength to carry draft and buff train loads as well as the weight of the car unit and its lading, without the need for weld joints inside the center sill.

Articulated connectors are attached to and extend from center sills of adjacent car units of a multi-unit railroad freight car, connecting the car units to each other and to a shared truck. The center sill of each of the car units includes a top member that is of increased thickness at the outer end of the center sill. A weld extending along a shoulder that extends around the main body of s portion of the articulated connector attaches the articulated connector portion to the outer end of the center sill with ample strength to carry draft and buff train loads as well as the weight of the car unit and its lading, without the need for weld joints inside the center sill.

An improved coupler knuckle with an improved interior configuration for handling forces imparted on the knuckle and transferring said imparted forces through the knuckle and improving handling of linear force loads and their transmission the interior having a force handling structure that includes spaced apart layers and cavities, with a cavity extending between the nose section and the tail section of the coupler knuckle.

An improved coupler knuckle with an improved interior configuration for handling forces imparted on the knuckle and transferring said imparted forces through the knuckle and improving handling of linear force loads and their transmission the interior having a force handling structure that includes spaced apart layers and cavities, with a cavity extending between the nose section and the tail section of the coupler knuckle.

A system comprising a type H tightlock coupler comprising a channel and an inner chamber, the channel running from a top side of the type H tightlock coupler to the inner chamber, and an anti-creep shelf disposed on an interior surface of the inner chamber, a plug comprising a first surface operable to contact the anti-creep shelf, the plug configured to fit at least partially within the channel, a link comprising a second surface operable to contact the anti-creep shelf and a hook, the link configured to fit at least partially within the channel, and a lock comprising a slot operable to receive the hook, the lock configured to fit at least partially within the inner chamber.

A tow hitch assembly for interconnecting two or more wheeled vehicles, such as railbikes, each vehicle having a frame, a front bumper and a rear bumper. The tow hitch assembly includes a linking member and a pair of cross members centrally and transversely attached to opposing ends of the linking member. Each cross member has a top wall, a front wall and a rear wall defining an open-ended lower channel configured to be fitted directly over one of the front and rear bumpers of one of the two or more wheeled vehicles. The linking member includes opposing end openings configured to engage a projecting pin of a corresponding cross member. Using a plurality of tow hitch assemblies, a plurality of wheeled vehicles can be moved between locations.

A tow hitch assembly for interconnecting two or more wheeled vehicles, such as railbikes, each vehicle having a frame, a front bumper and a rear bumper. The tow hitch assembly includes a linking member and a pair of cross members centrally and transversely attached to opposing ends of the linking member. Each cross member has a top wall, a front wall and a rear wall defining an open-ended lower channel configured to be fitted directly over one of the front and rear bumpers of one of the two or more wheeled vehicles. The linking member includes opposing end openings configured to engage a projecting pin of a corresponding cross member. Using a plurality of tow hitch assemblies, a plurality of wheeled vehicles can be moved between locations.