Patent US4575140A successfully refreshed from Google Patents.
US4575140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door lock method and apparatus
Assignee: Individual
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Filing: 1983-02-28
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Granted: 1986-03-11
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Expires: 2003-02-28
Abstract
Abstract A door lock mechanism is provided for positioning on the inside of the door and preventing the opening of the door. The mechanism comprises a main plate which slips over the doorknob handle, and a modified strike plate having an aperture structurally arranged for receiving a portion of the main plate. A simplified method is provided for easily and effectively securing a door, since the modified strike plate may be permanently secured to the doorjamb while the main plate may be quickly and easily positioned for locking the door. The method and apparatus of the present invention is well adapted for both commercial and residential use, since its components do not materially detract from the aesthetic qualities of the door.
Inventors
- 👤 Kenneth Dargis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:25
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/18; E05C19/184; Y; Y10; Y10T; Y10T292/00; Y10T292/34; Y10T292/37; Y10T292/379; Y10T292/391
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
208 words
A door fastening device including a hinged door having an interior doorknob, an interior door handle neck portion, latch means, and a doorjamb having an opening for receiving said latch means, comprising: a flat plate portion fixedly mounted on said doorjamb and having a flat plate aperture generally positioned over said doorjamb opening; a strike plate securing portion fixedly secured to said flat plate portion independent of said hinged door and having an elongate bore arranged with a substantially vertical axis positioned generally adjacent an interior corner of said doorjamb; a main plate portion positioned over said door handle neck portion and having a slot for receiving said door handle neck portion; an edge portion of said main plate portion forming said slot being structurally arranged for engagement with said door handle neck portion; said vertical axis of said elongate bore spaced toward said flat plate aperture with respect to a plane defined by said main plate portion; and an elongate pin member spaced from said plane defined by said main plate portion and fixedly secured to an upper portion of said main plate portion and structurally arranged for positioning within said elongate bore for limiting movement of said main plate portion toward said door handle neck portion.
Claim 2
Dependent Claim
208 words
A door fastening device including a hinged door having an interior doorknob, an interior door handle neck portion, latch means, and a doorjamb having an opening for receiving said latch means, comprising: a flat plate portion fixedly mounted on said doorjamb and having a flat plate aperture generally positioned over said doorjamb opening; a strike plate securing portion fixedly secured to said flat plate portion independent of said hinged door and having an elongate bore arranged with a substantially vertical axis positioned generally adjacent an interior corner of said doorjamb; a main plate portion positioned over said door handle neck portion and having a slot for receiving said door handle neck portion; an edge portion of said main plate portion forming said slot being structurally arranged for engagement with said door handle neck portion; said vertical axis of said elongate bore spaced toward said flat plate aperture with respect to a plane defined by said main plate portion; and an elongate pin member spaced from said plane defined by said main plate portion and fixedly secured to an upper portion of said main plate portion and structurally arranged for positioning within said elongate bore for limiting movement of said main plate portion toward said door handle neck portion.
Claim 3
Dependent Claim
34 words
A door fastening device as recited in claim 1, wherein said pin member has a generally rectangular cross-sectional configuration to minimize rotational movement of said main plate portion relative to said flat plate portion.
Claim 4
Dependent Claim
27 words
A door fastening device as recited in claim 1, further comprising: a deformable edge protecting means positioned over a substantial portion of said edge of said slot.
Claim 5
Dependent Claim
34 words
A door fastening device as recited in claim 1, further comprising: spacing between said elongate pin member and said edge portion of said main plate portion is fixed for preventing opening of said door.
Claim 6
Dependent Claim
35 words
A door fastening device as recited in claim 1, further comprising: latch means rotatably mounted to said main plate portion for restricting upward movement of said main plate portion relative to said flat plate portion.
Claim 7
Dependent Claim
45 words
A door fastening device as recited in claim 1, wherein said main plate portion is at least slightly rotatable with respect to said strike plate securing portion and is structurally arranged for binding engagement with said interior doorknob for preventing opening of said hinged door.
Claim 8
Dependent Claim
42 words
A door fastening device as recited in claim 1, wherein said pin member is spaced from said plane defined by said main plate portion and connected to said main plate portion by a bend of the material forming said main plate portion.
Claim 9
Dependent Claim
35 words
A door fastening device as recited in claim 1, wherein said vertical axis of said elongate bore is positioned opposite said hinged door with respect to a second plane defined by said flat plate portion.
Claim 10
Dependent Claim
35 words
A door fastening device as recited in claim 1, further comprising: said strike plate securing portion having a generally cylindrical configuration with said vertical axis substantially aligned with a face of said flat plate portion.
Claim 11
Independent Claim
159 words
A method of prohibiting opening of a door having an interior doorknob, an interior door handle neck portion and latch means, said door structurally arranged for closing against a doorjamb having an opening for receiving said door latch means, said method further comprising: affixing a strike plate securing portion having an elongate bore to said doorjamb independent of said door; positioning said strike plate securing portion with said elongate bore arranged in a substantially vertical axis adjacent said interior corner of said doorjamb; providing a main plate portion with an elongate pin member affixed thereto spaced from a plane defined by said main plate portion; and vertically lowering said main plate portion over said door handle neck portion and simultaneously positioning said elongate pin member fixedly secured to said main plate within said elongate bore and forming an interconnection between said main plate portion and said strike plate portion spaced from said plane defined by said main plate portion.
Claim 12
Independent Claim
159 words
A method of prohibiting opening of a door having an interior doorknob, an interior door handle neck portion and latch means, said door structurally arranged for closing against a doorjamb having an opening for receiving said door latch means, said method further comprising: affixing a strike plate securing portion having an elongate bore to said doorjamb independent of said door; positioning said strike plate securing portion with said elongate bore arranged in a substantially vertical axis adjacent said interior corner of said doorjamb; providing a main plate portion with an elongate pin member affixed thereto spaced from a plane defined by said main plate portion; and vertically lowering said main plate portion over said door handle neck portion and simultaneously positioning said elongate pin member fixedly secured to said main plate within said elongate bore and forming an interconnection between said main plate portion and said strike plate portion spaced from said plane defined by said main plate portion.
Claim 13
Dependent Claim
25 words
A method as defined in claim 10, further comprising: providing stop means for restricting upward movement of said main plate relative to said strike plate.
Claim 14
Dependent Claim
36 words
A method as defined in claim 10, further comprising: providing said main plate with a slot for receiving said door handle neck portion as said main plate is vertically lowered over said door handle neck portion.
Claim 15
Dependent Claim
26 words
A method as defined in claim 12, further comprising: providing a deformable edge protector adjacent said slot for limiting damage to said door handle neck portion.
Claim 16
Dependent Claim
30 words
A method as defined in claim 12, further comprising: structurally arranging said slot so that an edge of said main plate is in engagement with said door handle neck portion.
Claim 17
Dependent Claim
202 words
A door restraint mechanism for preventing the opening of a hinged door having an interior doorknob and an interior door handle neck portion, said hinged door positioned in a doorway having a doorjamb, said restraint mechanism comprising: a flat plate portion for fixedly mounting on said doorjamb; a strike plate securing portion fixedly secured to said flat plate portion independent of said hinged door and positioned generally adjacent an interior corner of said doorjamb and having an elongate aperture arranged with a substantially vertical axis; a main plate portion for positioning over said door handle neck portion and having a slot for receiving said door handle neck portion; an edge portion of said main plate portion forming said slot being structurally arranged for engagement with said door handle neck portion; said vertical axis of said elongate aperture spaced toward said doorjamb with respect to a plane defined by said main plate portion; and an elongate pin member spaced from said plane defined by said main plate portion and fixedly secured to an upper portion of said main plate portion and structurally arranged for positioning within said elongate aperture for limiting movement of said main plate portion toward said door handle neck portion.
Claim 18
Dependent Claim
202 words
A door restraint mechanism for preventing the opening of a hinged door having an interior doorknob and an interior door handle neck portion, said hinged door positioned in a doorway having a doorjamb, said restraint mechanism comprising: a flat plate portion for fixedly mounting on said doorjamb; a strike plate securing portion fixedly secured to said flat plate portion independent of said hinged door and positioned generally adjacent an interior corner of said doorjamb and having an elongate aperture arranged with a substantially vertical axis; a main plate portion for positioning over said door handle neck portion and having a slot for receiving said door handle neck portion; an edge portion of said main plate portion forming said slot being structurally arranged for engagement with said door handle neck portion; said vertical axis of said elongate aperture spaced toward said doorjamb with respect to a plane defined by said main plate portion; and an elongate pin member spaced from said plane defined by said main plate portion and fixedly secured to an upper portion of said main plate portion and structurally arranged for positioning within said elongate aperture for limiting movement of said main plate portion toward said door handle neck portion.
Claim 19
Dependent Claim
35 words
A door restraint mechanism as recited in claim 15, further comprising: said strike plate securing portion having a generally cylindrical configuration with said vertical axis substantially aligned with a face of said flat plate portion.
Claim 20
Dependent Claim
34 words
A door restraint mechanism as recited in claim 15, further comprising: spacing between said elongate pin member and said edge portion of said main plate portion is fixed for preventing opening of said door.
Claim 21
Dependent Claim
35 words
A door restraint mechanism as recited in claim 15, further comprising: stop means rotatably mounted to said main plate portion for restricting upward movement of said main plate portion relative to said flat plate portion.
Claim 22
Dependent Claim
35 words
A door restraint mechanism as recited in claim 15, wherein said pin member is spaced from said plane defined by said main plate portion by a bend of the material forming said main plate portion.
Claim 23
Dependent Claim
35 words
A door restraint mechanism as recited in claim 15, wherein said vertical axis of said elongate aperture is positioned opposite said hinged door with respect to a second plane defined by said flat plate portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |