Abstract: Apparatus for effecting a push pull driving connection between a pair of vehicles disposed in tandem relation with one end of each vehicle juxtaposed relative to the other. The apparatus has a rocking beam mountable on the juxtaposed end of one vehicle for pivotal movement thereon in a horizontal plane. Bumper rollers are carried by and project from said rocking beam in axially horizontal orientation for rolling engagement with the proximal wheels of said other vehicle whereby movement of one vehicle towards the other will procure engagement of the bumper rollers with the wheels as aforesaid and upon continuation of such movement in the same general direction will transmit a pushing action to said other vehicle through the engagement of said bumper rollers with said wheels. A beam extender is at each end of said rocking beam and there is a coupling arm on each said beam extender for hooking engagement with a said proximal wheel.

Abstract: Apparatus for effecting a driving connection between a pushing vehicle and a pushed vehicle. The apparatus has pushers attachable to and providing a bumper formation on the leading end of the pushing vehicle for pushing engagement with the wheels of the other vehicle. Each pusher includes a frame pivotally attachable to the leading end of the pushing vehicle for left and right swinging thereon about a vertical axis independently of the frame of the other pusher, and a coupler slidably carried by the frame for reciprocable sliding movement in a substantially horizontal direction transversely of the pushing vehicle.