Motor-operated sliding door assembly
AssigneeM. Bilt Enterprises, Inc.
InventorMichael M. Bilt
Life of this patent
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Abstract
A motorized drive unit for a horizontally sliding door section comprising a unitary housing assembly holding a drive motor and a floor-engaging wheel driven from the motor. A vertical lead screw fixedly positioned vertically on this housing assembly threadedly engages a nut fixedly positioned on the door section, so that the wheel can be raised from engagement with the floor. The housing assembly is slidable vertically on a support plate attached to the door section. A support member for the nut is attached to the same support plate.
Claims10
A motorized drive unit for a sliding door section comprising:
- a unitary housing assembly;
- a wheel rotatably mounted in said housing assembly and extending below said housing assembly for rolling engagement with a floor adjacent the door section;
- a motor in said housing assembly;
- drive means in said housing assembly acting between said motor and said wheel for imparting rotation to the wheel from the motor;
- means for mounting said housing assembly on said door section;
- and manually operable means mounted on said housing assembly and selectively operable to raise or lower said housing assembly on said door section, whereby to position said wheel in or out of engagement with the floor.
In a sliding door assembly for use on a building having a floor and a door opening above said floor, and means for slidably supporting a door section for horizontal movement across said door opening, the improvement which comprises:
- a door section having a peripheral frame with a top, bottom and opposite ends and a panel extending across the front of said frame;
- a drive wheel extending down for rolling engagement with the floor of the building adjacent said door opening, said wheel having a horizontal axis of rotation extending substantially perpendicular to said panel;
- a motor above said wheel;
- drive means acting between said motor and said wheel for imparting rotation to the wheel from the motor;
- unitary housing means supporting said motor, drive means and wheel on said door section;
- a rotatably vertically extending lead screw member;
- a nut member threadedly engaging said lead screw member;
- a handle for turning said lead screw member;
- means fixedly positioning one of said members vertically with respect to said housing means;
- and means fixedly positioning the other of said members vertically with respect to the door section frame whereby rotation of the lead screw member in one direction raises said housing means on said door section and rotation of the lead screw member in the opposite direction lowers said housing means on said door section.
Dependencies are inferred from the claim text.