Patent ID: 7526894

Claim:
A door for mounting within a doorway so as to pivot about an upright pivot axis, the door comprising: first and second panel sections each of which comprises a trailing edge portion; a spacer disposed at least in part between the trailing edge portion of said first and second panel sections; an elongated, integral, one piece spine comprising a body portion and first and second door engaging members projecting outwardly from the body portion, the first and second door engaging members defining a channel which receives at least a portion of the trailing edge portion of each of the first and second panel sections, the spine having first and second elongated hinge receiving bores having respective first and second hinge openings wherein the second hinge opening faces upwardly and the first hinge opening faces downwardly when the door is mounted in the doorway, and wherein the second hinge opening is above the first hinge opening when the door is mounted in the doorway; a first cam member sized for insertion through the first hinge opening and into the first hinge receiving bore, the first cam member being mounted to the spine within the first hinge receiving bore, the first cam member being mounted to the spine so as to remain at a fixed location relative to the spine as the door is pivoted, the first cam member having a first cam surface which is angled relative to the pivot axis and which faces the first hinge opening; a first door installation bracket adapted for mounting to a lower portion of the doorway; a second cam member coupled to the first bracket, the second cam member having a second cam surface which is angled relative to the pivot axis, a portion of the second cam member being inserted through the first hinge opening and into the first hinge receiving bore with the first and second cam surfaces engaging one another; a stop sized for insertion through the second hinge opening and into the second hinge receiving bore, the stop being mounted within the second hinge receiving bore; a second door installation bracket adapted for mounting to an upper portion of the doorway; a plug coupled to the second bracket, a portion of the plug being inserted through the second hinge opening and into the second hinge receiving bore; a biasing spring positioned within the second hinge receiving bore and between the stop and the plug, the biasing spring being adapted to apply a biasing force through the spine to urge the first and second cam members together; the first and second cam members being operable such that upon pivoting of the door about the pivot axis from a closed position to one or more open positions, the first and second cam surfaces are pivoted relative to one another to create a gap between said surfaces with the biasing spring urging the first and second cam surfaces toward one another following the pivoting of the door.