Patent ID: 8245446
Filing Date: 2012-08-21
Classification: E05D,E05F,E05Y,E06B

Abstract:
1. A tilt-up door for a building having a door opening to be closed by a door, the door having a vertical closed position and being movable in an opening cycle to a generally horizontal open position and being movable in a closing cycle from the open position to the closed position, the door having dimensions that are substantially equal to the door opening, comprising: a door frame including at least top and bottom horizontal members, at least two vertical side members connected to the top and bottom horizontal members at opposite ends of the top and bottom horizontal members, each of the at least two vertical side members having a horizontally extending pivot shaft tube connected to the vertical side member and positioned between the top and bottom horizontal members, and first and second horizontal outwardly extending cam followers each connected to one of the at least two vertical side members adjacent to the top horizontal member; first and second vertical channel members each having a web and spaced flanges forming a generally U-shaped channel, the first and second channel members being connected to the building and extending vertically along opposite sides of the door opening with the generally U-shaped channels facing each other and the door opening; first and second generally horizontal track members each having first and second ends, each of the first and second track members being supported with the first end adjacent one of the vertical channel members and the top edge of the door opening, each horizontal track member having a curved cam surface extending from adjacent the first end toward the second end; first and second carriages each including a horizontal pivot shaft journal and at least two wheels, each of the carriages being positioned in one of the U-shaped channels for vertical movement in the U-shaped channels; first and second horizontally extending pivot shafts each rotatably connecting a pivot shaft tube to a pivot shaft journal with each of the first and second outwardly extending cam followers engaging one of the cam surfaces; a horizontally extending truss on the outside of the door connected to the at least two vertical side members at a vertical position between the top and bottom members to be outside the door opening when the door is in the open position and located generally adjacent the pivot shaft tubes, and at least one actuator connected to the first and second carriages operable to move the first and second carriages in the U-shaped channels; wherein the door is mounted for vertical movement and for tilting movement about the horizontal axis of the pivot shafts in the door opening when the actuator is operated to move the first and second carriages vertically in the U-shaped channels and the first and second cam followers along the respective cam surfaces to tilt the door to a generally horizontal position as the door is moved vertically upward.