Lockable hitch for trailern

A security hitch principally for joining a towed vehicle to a towing vehicle, which comprises:

• a ball means having a spherical portion and a skirt portion to be mounted on a support plate of such towing vehicle, with said skirt portion in contact with an upper surface of said support plate, said ball means being provided with an axial passageway extending through said skirt portion and said spherical portion, said passageway provided with internal screw threads at least throughout said skirt portion;
• a socket means attached to such towed vehicle, said socket means adapted with a dome portion to closely receive said spherical portion of said ball means and including means for releasably engaging said socket means to said ball means, said dome portion being provided with a centrally positioned aperture;
• and
• a bolt means having first and further ends for securing said ball means to said support plate, said bolt means having an enlarged head portion at said first end to bear against a bottom surface of said support plate and a shank extending from said head portion to said further end of a length sufficient to pass through said support plate, through said ball means and extend through said aperture in said dome of said socket means when said socket means is engaged with said ball means, said shank being provided with external screw threads along at least a portion of the length adjacent said head for threadable engagement with said threads in said passageway, said shank further provided with a transverse hole adjacent said further end to receive a shackle of a locking means.