Fifth wheel bearing attachment

Claim 1

In a fifth wheel assembly including a bottom wall of a trailer mounting a king pin and a lower slotted tractor plate adapted for locking engagement with said king pin, the improvement comprising a pre-assembled anti-friction device for detachably mounting, as a unit, on said trailer bottom wall, said device comprising a bushing, a flange provided on one end of said bushing, a first bearing plate supported by said flange and rotatably mounted thereon, a second bearing plate, said second bearing plate being centrally apertured for receiving the other end of said bushing, said second bearing plate being rigidly connected to the other end of the bushing, and a third plate positioned between said first and second bearing plates and mounted for free rotation about the bushing, said third plate being formed from anti-friction material; said king pin being freely insertable into said bushing, said second bearing plate being detachably secured to the bottom wall of the trailer, and said first bearing plate being frictionally engageable with and by said tractor plate and rotatable therewith.