Door stopper
First Claim
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1. An apparatus for stopping and holding a door open, comprising:
- (a) a first ferromagnetic plate means comprising;
a first ferromagnetic plate having a hole in its center; and
a first ferromagnetic projection being positioned through said hole;
(b) a magnetic holding means comprising;
a disk-like permanent magnet having a hole through its center;
a second disc-like ferromagnetic plate having a hole being positioned against a first pole of said permanent magnet;
means for fixedly holding said permanent magnet against said second ferromagnetic plate; and
a second ferromagnetic projection being positioned through said holes of said magnetic holding means;
(c) a first mounting mans for mounting one of said first plate means and said magnetic holding means on one of said door and a co-operating fixed surface;
(d) a second mounting means for mounting the other of said first plate means and said magnetic holding means on the other of said door and said fixed surface; and
(e) a biasing means for biasing one of said magnetic holding means and said first plate on said second mounting means away from the respective door and cooperating fixed surface,whereby when said door is moved to its open position, a second pole of said permanent magnet being positioned and aligned with said first plate means to complete a magnetic circuit to hold said door open and said first projection engaging said second projection within said hole of said permanent magnet to enhance said magnetic circuit.
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Abstract
The present invention relates to improvements in door stoppers for keeping doors open. More particularly, the invention offers door stoppers which facilitate opening/closing of the door by the attraction of a permanent magnet, prevent damage to the attracting member by causing the attracting member and the attracted member comprising such a door stopper to gradually attract each other by a buffer action, and make either one of the attracting member or the attracted member swingable so as to enable secure and stable attraction.
82 Citations
11 Claims
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1. An apparatus for stopping and holding a door open, comprising:
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(a) a first ferromagnetic plate means comprising; a first ferromagnetic plate having a hole in its center; and a first ferromagnetic projection being positioned through said hole; (b) a magnetic holding means comprising; a disk-like permanent magnet having a hole through its center; a second disc-like ferromagnetic plate having a hole being positioned against a first pole of said permanent magnet; means for fixedly holding said permanent magnet against said second ferromagnetic plate; and a second ferromagnetic projection being positioned through said holes of said magnetic holding means; (c) a first mounting mans for mounting one of said first plate means and said magnetic holding means on one of said door and a co-operating fixed surface; (d) a second mounting means for mounting the other of said first plate means and said magnetic holding means on the other of said door and said fixed surface; and (e) a biasing means for biasing one of said magnetic holding means and said first plate on said second mounting means away from the respective door and cooperating fixed surface, whereby when said door is moved to its open position, a second pole of said permanent magnet being positioned and aligned with said first plate means to complete a magnetic circuit to hold said door open and said first projection engaging said second projection within said hole of said permanent magnet to enhance said magnetic circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for stopping and holding a door open, comprising:
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a ferromagnetic plate means having a first ferromagnetic plate with means for positioning a first ferromagnetic projection therewith; a magnetic field generating means having a second ferromagnetic plate positioned against a first pole of said magnetic field generating means and means for positioning a second ferromagnetic projection therewith; a first mounting means for mounting one of said first plate means and said magnetic field generating means on one of said door and a co-operating fixed surface; a second mounting means for mounting the other of said first plate means and said magnetic holding means on the other of said door and said fixed surface; and a biasing means for biasing one of said magnetic field generating means and said first plate mans in said second mounting means away from the respective door and co-operating fixed surface, whereby one of said first plate and projection and second plate and projection in said second mounting means being movable together when longitudinal force is applied by said door.
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Specification