Patent US4474394A successfully refreshed from Google Patents.
US4474394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced assembly of strike plate to door frame
Assignee: Securitron Magnalock Corp
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Filing: 1982-08-25
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Granted: 1984-10-02
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Expires: 2002-08-25
Abstract
Abstract A lock strike plate is coupled to a door frame by orthogonal coupling means which mate within the interior of the door frame. The orthogonal coupling means not only provide the means for mounting the strike plate to the door frame, but also reinforce the door frame itself mandating the removal of a large portion of the door frame before a forced entry through a door locked and utilizing the innovative strike plate assembly of the invention can be successful.
Inventors
- 👤 Alois Crepinsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:32
CPC Classifications
E; E05; E05B; E05B15/00; E05B15/02; E05B15/0205; Y; Y10; Y10T; Y10T292/00; Y10T292/68
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
In combination with a door frame having at least two orthogonal surfaces a reinforced assembly of a lock strike plate to said door frame comprising: strike plate means having at least two orthogonal faces for mating with two complementary orthogonal surfaces of said door frame; and orthogonal coupling means matingly coupled within said door frame for coupling said at least two orthogonal faces of said strike plate means to two complementary orthogonal surfaces of said door frame.
Claim 2
Dependent Claim
77 words
In combination with a door frame having at least two orthogonal surfaces a reinforced assembly of a lock strike plate to said door frame comprising: strike plate means having at least two orthogonal faces for mating with two complementary orthogonal surfaces of said door frame; and orthogonal coupling means matingly coupled within said door frame for coupling said at least two orthogonal faces of said strike plate means to two complementary orthogonal surfaces of said door frame.
Claim 3
Dependent Claim
38 words
The reinforced assembly of claim 1 wherein said orthogonal coupling means comprises first reinforcing means coupled to the interior of said door frame through a first one of said at least two orthogonal surfaces of said door frame.
Claim 4
Dependent Claim
39 words
The reinforced assembly of claim 2 wherein said orthogonal coupling means further comprises second reinforcing means coupled to the interior of said door frame through a second one of said at least two orthogonal surfaces of said door frame.
Claim 5
Dependent Claim
29 words
The reinforced assembly of claim 3 wherein said first reinforcing means further comprises means for matingly coupling with said second reinforcing means within the interior of said door frame.
Claim 6
Dependent Claim
45 words
The reinforced assembly of claim 4 wherein said first reinforcing means further comprises means for coupling a first of said at least two orthogonal faces of said strike plate means to said first one of said at least two orthogonal surfaces of said door frame.
Claim 7
Dependent Claim
50 words
The reinforced assembly of claim 5 wherein said means for coupling a first of said at least two orthogonal faces of said strike plate means to said first one of said at least two orthogonal surfaces of said door frame further comprises means for coupling security chain latch means thereto.
Claim 8
Dependent Claim
45 words
The reinforced assembly of claim 5 wherein said second reinforcing means further comprises means for coupling a second of said at least two orthogonal faces of said strike plate means to said second one of said at least two orthogonal surfaces of said door frame.
Claim 9
Dependent Claim
44 words
The reinforced assembly of claim 7 wherein: said first reinforcing means comprises reinforcing bar means; and said means for matingly coupling with said second reinforcing means comprises a through hole in said reinforcing bar means into which said second reinforcing means is matingly introduced.
Claim 10
Dependent Claim
37 words
The reinforced assembly of claim 8 wherein said second reinforcing means comprises a screw threaded fastener threadedly engaged with said door frame and passing through said through hole in said first reinforcing means to matingly engage therewith.
Claim 11
Dependent Claim
37 words
The reinforced assembly of claim 8 wherein said second reinforcing means comprises a screw threaded fastener passing through said door frame and threadedly engaged with said through hole in said first reinforcing means to matingly engage therewith.
Claim 12
Dependent Claim
52 words
The reinforced assembly of claim 9 or 10 wherein said means for coupling a first of said at least two orthogonal faces of said strike plate means to said first one of said at least two orthogonal surfaces of said door frame further comprises means for coupling security chain latch means thereto.
Claim 13
Dependent Claim
56 words
The reinforced assembly of claim 8 wherein: said door frame further comprises a third surface orthogonal to said second one of said at least two orthogonal surfaces of said door frame; and said strike plate means further comprises a third face orthogonal to said second of at least two orthogonal faces of said strike plate means.
Claim 14
Dependent Claim
32 words
The reinforced assembly of claim 12 wherein said first reinforcing means further comprises means for coupling said third face of said strike plate means to said third surface of said door frame.
Claim 15
Dependent Claim
50 words
The reinforced assembly of claim 13 wherein said means for coupling a first of said at least two orthogonal faces of said strike plate means to said first one of said at least two orthogonal surfaces of said door frame further comprises means for coupling security chain latch means thereto.
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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |