US3791687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pop up magnetic door stop and holder
Assignee: Individual
•
Filing: 1972-06-19
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Granted: 1974-02-12
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Expires: 1992-06-19
Abstract
Abstract A cylindrical bar of magnetic material pops up from its installed position in a floor when a magnet, carried by a housing affixed to a door, reaches the position of installation of the bar, as the door is opened, such attraction of the bar to the magnet serving to stop and hold the door in its open position. A manually operable push member is capable of separating the cylindrical bar of magnetic material from the magnet, to weaken the holding power of the magnet, whereby the door may be closed when desired. A pair of small protuberances extending downwardly from the proximate end face of the magnet housing and forming a part thereof, enables this end of the housing to span the cylindrical bar when attracted to the magnet, whereby displacement of the door from its position is precluded until the cylindrical bar is pushed from its engagement with the magnet. One of the protuberances may extend lower than the push member when in down position, to always function as a stop to limit maximum opening of a door.
Inventors
- 👤 H Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:19
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/56; Y; Y10; Y10S; Y10S292/00; Y10S292/15; Y10T; Y10T292/00; Y10T292/11
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
A pop-up magnetic door stop and holder assembly comprising a pair of sub-assemblies, one sub-assembly including a magnet, the other subassembly including magnetic material, means for affixing one of said sub-assemblies to a door, means for anchoring the other of said sub-assemblies to the floor at a location where it is desired to stop and hold a door in an open position, said magnet and magnetic material, when aligned in an installation, being sufficiently close to cause said magnet to attract said magnetic material to hold said door, and means for weakening the magnetic attraction of said magnet for said magnetic material in the absence of door movement and while said magnet and said magnetic material are still in such alignment, to facilitate a separation of said sub-assemblies.
Claim 2
Dependent Claim
128 words
A pop-up magnetic door stop and holder assembly comprising a pair of sub-assemblies, one sub-assembly including a magnet, the other subassembly including magnetic material, means for affixing one of said sub-assemblies to a door, means for anchoring the other of said sub-assemblies to the floor at a location where it is desired to stop and hold a door in an open position, said magnet and magnetic material, when aligned in an installation, being sufficiently close to cause said magnet to attract said magnetic material to hold said door, and means for weakening the magnetic attraction of said magnet for said magnetic material in the absence of door movement and while said magnet and said magnetic material are still in such alignment, to facilitate a separation of said sub-assemblies.
Claim 3
Dependent Claim
77 words
A pop-up magnetic door holder in accordance with claim 1, characterized by a physical stop depending from a location on the door sub-assembly such as to traverse the location of a floor sub-assembly before magnetic attraction between said magnet and magnetic material can occur, whereby upon such occurrence, said magnet and magnetic material, in the absence of said weakening of said attraction between said magnet and magnetic material, function to physically block return movement of said stop.
Claim 4
Dependent Claim
49 words
A pop-up magnet door stop holder in accordance with claim 1, characterized by said means for weakening the magnetic attraction of said magnet for said magnetic material while still in such alignment, including manually operable means independent of door movement, for forcibly separating said magnetic material from said magnet.
Claim 5
Dependent Claim
124 words
A pop-up magnetic door stop and holder assembly in accordance with claim 3, characterized by a door having one of said sub-assemblies affixed thereto, a floor having the remaining sub-assembly installed on an arc defined by said door during opening, a door closer on said door and exerting a closing force on said door when said door is in open position, said closing force being less than maximum magnetic holding force of said door stop and holder assembly but greater than the holding force of said weakened magnetic attraction due to said aligned separation of said magnet and magnetic material, whereby said door can be maintained in open position but will automatically close upon such aligned separation between said magnet and said magnetic material.
Claim 6
Dependent Claim
42 words
A pop up magnetic door stop and holder in accordance with claim 3, characterized by said separation means including a push member adapted to engage said magnetic material, and manually controllable cam means for urging said push member against said magnetic material.
Claim 7
Dependent Claim
57 words
A pop up magnetic door stop and holder in accordance with claim 5, characterized by means for limiting the extent of movement of a door in the opening direction, to a position in line with said magnetic material, when said push member is in its functional position of separating said magnetic material from engagement against said magnet.
Claim 8
Dependent Claim
64 words
A pop up magnetic door stop and holder in accordance with claim 6, characterized by said means for limiting the extent of movement of said door in the opening direction, including a protuberance extending from said first sub-assembly on the arc of movement of said sub-assembly when opening said door and terminating beyond the plane of said push member when in its functioning position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |