Vertically adjustable door hinge assembly

Claim 1

In a hinge assembly for a door of the center-hung type having a vertical door frame with a door opening therein, a door mounted for pivotal movement on the door frame and adapted to close the door opening, a first pair of hinge brackets fastened to the door frame adjacent the upper and lower edges of the door, a second pair of complementary hinge means fastened to the door adjacent the hinge brackets, and vertically arranged hinge pin means between each hinge bracket and its complementary hinge means so the door may pivot with respect to the hinge brackets; the improvement comprising: vertically adjustable slot and bolt means for securely fastening the lower hinge bracket to the door frame; and a rotatable cam plate having a peripheral cam face in engagement with the underside of the lower hinge bracket, having tool-receiving means to permit leverage to be applied to rotate the cam plate, and having an adjustable means for securely fastening the cam plate to the door frame in any position, whereby said rotatable cam plate serves to adjust the position of the lower hinge bracket and additionally reinforces the holding power of said slot and bolt means.