US4073525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door latch securing device
Assignee: GURULE
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Filing: 1977-06-09
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Granted: 1978-02-14
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Expires: 1997-06-09
Abstract
Abstract Apparatus for securing the latch bolt of a conventional door lock against unauthorized withdrawal including a pin assembly provided with a handle, wherein the pin assembly can be alternately stored in a retainer plate or secured thereby in a locked position. More specifically the retainer plate includes an opening conformed to receive the pin of the pin assembly, said opening being aligned with a bore extending through the door into the latch bolt. Adjacent the opening there is provided in the retainer plate a storage hoop which is conformed to function both to store the pin assembly and to secure the handle when inserted.
Inventors
- 👤 Marcelo Gurule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:53
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/20; E05B17/2007; E05B17/2023; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1014; Y10T292/1022; Y10T292/1028; Y10T292/79
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
In a door lock including a latch bolt spring biased for latching a door and handle means for manual articulation of said bolt against the spring bias thereof, the improvement comprising: a support plate adapted for attachment to the surface of said door in substantial alignment over said latch bolt, said plate including an opening in the face thereof aligned over said bolt and a clip structure extending from said plate proximate one horizontal edge thereof conformed in the manner of a substantially semicircular hoop segment adjacent said plate and a straight segment distal thereof substantially parallel to said plate; a first and second bore formed respectively in said door and said latch bolt in axial alignment with said opening; and a pin assembly including a pin extending from a handle, said pin being conformed for alternate receipt in said opening and first and second bores and in said hoop segment, and said handle including a detent extending radially from the axis of said pin conformed for receipt between said straight segment and said plate when said pin is inserted in the common interior of said opening and said first and second bore.
Claim 2
Dependent Claim
193 words
In a door lock including a latch bolt spring biased for latching a door and handle means for manual articulation of said bolt against the spring bias thereof, the improvement comprising: a support plate adapted for attachment to the surface of said door in substantial alignment over said latch bolt, said plate including an opening in the face thereof aligned over said bolt and a clip structure extending from said plate proximate one horizontal edge thereof conformed in the manner of a substantially semicircular hoop segment adjacent said plate and a straight segment distal thereof substantially parallel to said plate; a first and second bore formed respectively in said door and said latch bolt in axial alignment with said opening; and a pin assembly including a pin extending from a handle, said pin being conformed for alternate receipt in said opening and first and second bores and in said hoop segment, and said handle including a detent extending radially from the axis of said pin conformed for receipt between said straight segment and said plate when said pin is inserted in the common interior of said opening and said first and second bore.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1 further comprising: flexible connecting means attached between said handle and said plate.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 2 wherein: said plate comprises a substantially rectangular planar metal structure; and said clip comprises a partly separated rectangular strip of said plate.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |