Patent ID: 8656558

Claim:
A locking hinge having a locked configuration and an unlocked configuration, comprising: a first hinge member having a hinge leaf portion and a lower sleeve portion, said lower sleeve portion having a passage with an interior wall and an upper cylindrical male element extending axially upwardly from a lower female portion, said upper cylindrical male element having an outer diameter; a second hinge member having a leaf portion and an upper sleeve, said upper sleeve including an upper female portion, a medial portion having an interior wall, and a lower female portion, said lower female portion being cylindrical and having an interior diameter slightly larger than said outer diameter of said upper cylindrical male element of said first hinge member, such that said upper cylindrical male element is rotatably inserted into said lower female portion; a hinge pin having a shaped lower portion, a cylindrical medial neck, and a shaped head; and a locking apparatus for moving said hinge pin from an upper unlocked position into a lower locked position; wherein said head of said hinge pin is shaped to conform to the shape of said medial portion of said upper sleeve, such that said head is slidably insertable with tight clearances into said medial portion of said upper sleeve; and wherein said upper female portion of said upper sleeve of said second hinge member is large enough to accommodate free rotation of said head when said hinge pin is moved into the unlocked position; and wherein said lower portion of said hinge pin is shaped to be slidably insertable with tight clearances into said passage of said lower sleeve portion, such that when said hinge pin is in an upper unlocked position said first and second hinge members are rotated relative to one another, and when said hinge pin is in a lower locked position, said first and second hinge members are prevented from rotating relative to one another.