Adjustable pivot door assembly

A combination comprising:

• a vertically oriented door;
• a pivot pin vertically mounted in a lower edge of the door, the pin having a frusto-conically shaped head on its lower end extending below the door;
• a mounting bracket to be mounted in a door frame beneath said door, said bracket having a slot with serrations on side edges;
• and
• a pivot block including two block halves spaced from each other by a slight gap;
• each block halve having a depending anchor which fits within said slot;
• each of said block halves having an upper portion which rests on said bracket;
• a resilient connection joining one end of each half and holding the halves spaced by said gap, but permitting said halves to be pressed into mating engagement with each other, each of said block halves having a recess forming a portion of a socket, positioned to receive the head of said pivot pin;
• a plurality of grooves in each of the socket portions to mate with splines on the pin head;
• and
• a plurality of serrations formed on outer surfaces of said anchors which mate with the serrations on said bracket when the weight of said door causes the head of said pin to urge the block halves outwardly and thereby capture the block in the slot and prevent the block, together with the pin and the door from moving along said slot, the pin head being larger than the gap between the block halve portions forming the socket when the anchor serrations engage the bracket serrations so that the pin head cannot pass through the socket.

A lower pivot assembly for a folding door comprising:

• a jamb bracket connectable in a corner between a door jamb and the floor, said jamb bracket containing an elongated slot extending parallel to the floor when the bracket is mounted to the floor, the slot having a pair of spaced elongated sides;
• a plurality of serrations along each elongated side of said slot and extending laterally inwardly towards each other;
• a pivot block having two spaced halves resiliently connected at one end, said halves forming a socket;
• an anchor depending from each block half, and having a plurality of serrations extending laterally outward mating with said slot serrations;
• a pivot pin for connection to each door in a manner to adjust door height;
• and
• an enlarged, generally conical head on the lower end of the pin, the lower portion of said head being narrower than the upper portion, said head having a plurality of splines extending along the length of said head to engage grooves in said socket and exert vertical and lateral forces on said pivot block halves, said pivot block halves being separated by a gap to accommodate said pin head and to cause the plurality serrations on each anchor to engage the serrations on the bracket slot to prevent translation of the pivot block along the slot and to prevent the pin head from passing through the socket.