Shock pivot hinge

The combination with a door supported in a door frame by conventional hinges having hinge pins spaced a predetermined distance from the door, and a stop limiting the distance the door can be opened, of a shock pivot hinge comprising an upper jamb leaf mounted on the door frame above said hinge pins, a door leaf mounted on the door between the jamb leaf and said conventional hinges, an end portion of said door leaf extending outwardly over said hinge pins and provided with a vertical opening above them, the jamb leaf being provided with an opening therein directly above said first-mentioned opening, blocks mounted in said openings, and a shock pivot pin extending vertically from one of said blocks toward the other block in axial alignment with the underlying hinge pins, said shock pivot pin being offset in the same direction relative to the centers of both blocks in a vertical plane perpendicular to the closed door, and said blocks being turnable 180.degree. in said leaf openings to locate said shock pivot pin in axial alignment with underlying hinge pins spaced from the door a different predetermined distance than said first-mentioned predetermined distance.