Abstract: An elevator tongue for connection to the forward end of a farm implement having wheels at its rearward end, the tongue having cooperating elements respectively affixed to the vehicle and attachable to a tractor, and being relatively movable, when released to do so, in a forward and rearward direction, movement in one direction being operable to lower the forward end of the implement to rest on the ground, and movement in the opposite direction being operable to raise the forward end of the vehicle from the ground to a normal transport height.

Abstract: A truck-trailer brake system including a standard hydraulic brake system of the truck, an electrically powered hydraulic brake system for a trailer, the components of which are mountable on the trailer, the trailer brake system being powered by the truck electrical system so as to be automatically actuated in coordination with the truck brake system whenever the truck brakes are applied. The trailer brakes may be operated independently of the truck brakes, as may be desired in special circumstances. Also, the hydraulic power components of the trailer system may be utilized for operating hydraulic accessories of the trailer, and the trailer brakes are applied automatically in case the trailer should break away from the truck.