The present invention is directed to a lock (100) for securing to a trailer socket (112).

The lock (100) comprising a base (102) with a first upstanding member (104) extending from the base (102) and adapted to engage the trailer socket (112) of the trailer.

The coupler head portion comprises top and bottom coupler pulling lugs each having a respective coupler pulling lug engagement face.

A kingpin is connected to the fifth wheel plate and is adapted to be engaged by an associated tractor fifth wheel.

A first locking mechanism is operably secured to the hitch receiver and releasably engages the hitch member to maintain the hitch member in a retracted position.

A coupler draft gear includes a draft gear yoke, a draft key and the draft follower.

At least one of the coupler pulling lug engagement faces of the top and bottom coupler pulling lugs is angled with respect to the longitudinal axis.

The present invention is directed to a lock (100) for securing to a trailer socket (112).

The coupler yoke can be exchanged with the prior coupler yoke.

A coupler includes a coupler head, a coupler shank and a coupler tail.

Attachment of coupling balls and towing brackets

The second connection part (11) comprises the complementary parts of the detent system (20) and of the engagement system (17).

Conventional screw coupling and other non-automatic coupling systems

Attachment of coupling balls and towing brackets

The coupler head portion comprises a guard arm portion extending from the nose portion towards the shank portion.