Hinge housing

A hinge housing in combination with a door,

• (1) the door comprising at least one wall of thin sheet, the wall having an inside face and an outside face, and an opening therethrough for receiving the hinge housing,
• (2) the hinge housing comprising:
• (a) a liner plate for installation along an underside thereof against the inside face of the wall, the liner plate having an opening which generally conforms to the opening in the wall, the liner plate comprising at least two first locking projections extending from the underside of the plate which grip the outside face of the wall upon rotation of the liner plate, and
• (b) a fastening flange for installation against the upper side of the liner plate, the fastening flange comprising a cup portion and a flange portion extending radially from a rim of the cup portion, the outside perimeter of the cup portion generally conforming to the opening in the wall, such that when the fastening flange is installed against the liner plate, the flange portion covers the liner plate and the cup portion extends into the opening and through the wall, the fastening flange further comprising at least two second locking projections extending from the underside of the flange portion, the second locking projections corresponding in number and arrangement with the first locking projections, the second locking projections being engageable with the first locking projections upon rotation of the fastening flange to forcibly retain the first locking projections against the outside face of the wall.