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US 11,945,685 B2Granted
Magnetically activated elevator door lock
AssigneeOtis Elevator Company
InventorWei Wei
Life of this patent
Estimating the term…
Abstract
An illustrative example embodiment of an elevator door lock includes a latch that is moveable between a locking position and a released position. The latch includes a locking surface configured to engage a stop when the latch is in the locking position. A magnet is situated to magnetically attract a portion of the latch to selectively move the latch from the locking position into the released position.
Claims13
An elevator door lock, comprising:
- a latch that is moveable between a locking position and a released position, the latch including a locking surface configured to engage a stop when the latch is in the locking position, and wherein
- the locking surface is near a first end of the latch, and
- the latch pivots about a pivot axis as the latch moves between the locking position and the released position;
- and
- a magnet that is situated to magnetically attract a portion of the latch to selectively move the latch from the locking position into the released position, wherein
- the portion of the latch that is magnetically attracted by the magnet is near a second end of the latch,
- a mass of the latch is greater near the second end,
- gravity biases the second end in a downward direction to move the latch into the locking position,
- the magnet attracts the portion against the bias of gravity to move the latch into the released position,
- the magnet is supported for movement relative to the latch between a first position and a second position,
- the latch is in the locking position when the magnet is in the first position,
- the magnet attracts the portion of the latch when the magnet is in the second position, and
- the latch is in the released position when the magnet is in the second position.
10 more elements
An elevator door assembly, comprising:
- an elevator door lock comprising
- a latch that is moveable between a locking position and a released position, the latch including a locking surface configured to engage a stop when the latch is in the locking position, and
- a magnet that is situated to magnetically attract a portion of the latch to selectively move the latch from the locking position into the released position;
- a door;
- a door mover configured to move the door between open and closed positions;
- and
- wherein the magnet is associated with the door mover for movement between a first position and a second position,
- the magnet does not attract the portion of the latch when the magnet is in the first position,
- the latch is in the locking position when the magnet is in the first position,
- the magnet attracts the portion of the latch when the magnet is in the second position, and
- the latch is in the released position when the magnet is in the second position.
8 more elements
Dependencies are inferred from the claim text.