Magnetically actuated door seal
AssigneeCmech (Guangzhou) Ltd.
InventorChen Yuan Meng
Life of this patent
Estimating the term…
Abstract
An automatic door seal seals the gap between the lower edge of a door and a threshold. The seal is magnetically actuated so as to move downward into sealing engagement with the threshold when the door is closed and raises out of engagement when the door is opened. A transmission assembly converts horizontal movement from the magnetic force into vertical movement for the seal. Springs provide a reset force when the magnetic force is eliminated so as to retract the seal strip whenever the door is moved from the closed position.
Claims16
A self-lifting sealing apparatus for a bottom edge of a door and a threshold of a door frame, comprising:
- a holder with a downward opening and mounted in a channel in the bottom edge of the door between interior and exterior surfaces of the door;
- a magnetically actuated transmission assembly mounted in the holder;
- a first magnet at one end of the transmission assembly;
- a second magnet mounted on the door frame;
- a sealing strip extending downwardly from the. transmission assembly;
- wherein the transmission assembly moves automatically in response to an absence of a magnetic force between the magnets to a first horizontal position as the door is partially opened away from the door frame causing the sealing strip to move into a raised position within the holder and moves automatically when the magnetic force is present between the magnets to a second horizontal position after the door is closed causing the sealing strip to move into a lowered position below the holder.
A method of sealing a gap between a lower edge of a door mounted in a door frame and a threshold of an entryway, the door having a pivot edge hinged to the door frame and an opposite edge adjacent the door frame when the door is closed and the door having a seal mounted in a recess in the lower edge of the door, the seal being movable between a raised position when the door is opened and a lowered position when the door is closed, the method comprising:
- automatically moving the seal to the lowered position by a magnetic force between a first magnet in the opposite edge of the door and a second magnet in the door frame after the door is closed, and automatically moving the seal to the raised position by a spring force when the magnetic force is absent between the first and second magnets after the door begins to pivot open with the opposite edge moved away from the door frame.
An automatic door seal for sealing a gap between a lower edge of a door mounted in a door frame and a threshold of an entryway, the door having a pivot edge hinged to the door frame and an opposite edge adjacent the door frame when the door is closed, the door seal comprising:
- a seal mounted in a recess in the lower edge of the door and being automatically movable between a lowered position when the door is closed and a raised position when the door is open;
- magnets mounted in the door and in the door frame to move the seal to the lowered position in response to a magnetic force between the magnets;
- a spring attached to the seal to move the seal to the raised position;
- the seal being automatically moved to the raised position when the magnetic force between the magnets is absent as the door begins to pivot open and automatically moved to the lowered position when the magnetic force between the magnets is present after the door is closed.
Dependencies are inferred from the claim text.