Tilting door assembly
OwnerCraig John BUISTinventor
Life of this patent
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Abstract
A tilting door assembly having a door frame and a door leaf arranged to move from a vertical closed position to a horizontal open position about a horizontal tilt axis. A plurality of fixed guide tracks guide movement of the door leaf between the open and closed positions. A counterweight is provided, with a sheave and cable system arranged between the door leaf and the counterweight and a winch coupled to the counterweight via a winch cable. The winch is operable to open and close the door such that raising the counterweight moves the door towards the closed position, and lowering the counterweight moves the door towards the open position. The counterweight has a mass that is greater than a mass of the door leaf.
Claims30
A tilting door assembly comprising:
- a door frame;
- a door leaf arranged to move from a substantially vertical closed position to a substantially horizontal open position, the leaf having a horizontal tilt axis;
- a plurality of guide tracks fixed relative to the frame, configured to guide movement of the door leaf between the open and closed positions;
- a counterweight;
- a sheave and cable system arranged between the door leaf and the counterweight;
- a winch coupled to the counterweight via a winch cable and operable to open and close the door, whereby raising the counterweight moves the door towards the closed position, and lowering the counterweight moves the door towards the open position;
- and
- wherein the counterweight has a mass that is greater than a mass of the door leaf.
Dependencies are inferred from the claim text.