Abstract: An invertible gooseneck trailer hitch mechanism is provided. A frame supports a housing having an opening therein for receiving a hitch member in an upright use position or in inverted storage position. A base portion of the hitch member has a circumscribing groove therein to permit cooperation with a pin of a retaining assembly. A user may selectively extend or retract the pin from receipt in the groove by rotating a spaced apart handle when the ball is in either the use or storage positions to retain the hitch member in the opening.

Abstract: An offset coupler device for increasing the relative distance between a tow vehicle having a fifth wheel hitch and a trailer having a kingpin during use is provided. The offset coupler has an upper plate member with an opening therein for receiving the kingpin of the trailer. A clamp member is clamped on the kingpin of the trailer and includes a means for pressing the upper plate member into abutting engagement with a skid plate of the trailer. A lower plate member of the offset coupler has a kingpin depending downwardly from a lower surface thereof. The kingpin of the offset coupler is spaced apart laterally from the opening to provide an offset. Once the offset coupler is coupled with the trailer, the trailer is coupled with the tow vehicle by receiving the kingpin of the offset coupler in the fifth wheel hitch.