US4085650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinge security stud
Assignee: LORI CORP
•
Filing: 1977-02-28
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Granted: 1978-04-25
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Expires: 1997-02-28
Abstract
Abstract A stud for attaching to a door hinge to prevent the removal of the door by the removal of the hinge pins. The security stud has an elongated screw having self-threaded metal threads at the end thereof and wood threads between the metal threads and the head of the screw so that the screw can be threaded into both metal and wooden doors. The head of the screw has dual bevel portions abutting each other in opposite directions; and a stud extending in the opposite direction from the threaded portion of the screw with a slot for a screwdriver tip.
Inventors
- 👤 Jean Louis Flynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:27
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/0018; E05D11/0027; E05D2011/0045; E05D5/00; E05D5/02; E05D5/04; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10S; Y10S411/00; Y10S411/91; Y10T; Y10T292/00; Y10T292/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A hinge security stud comprising: an elongated screw having an elongated threaded portion, a head portion and a stud portion, said head portion having a pair of oppositely disposed back-to-back of said bevelled portions tapering of annular bevelled portions, one inwardly in the direction of said threaded portion and the second of said bevelled portions tapering inwardly in said stud direction, and said stud portion being an elongated generally cylindrical member intersecting said second annular, bevelled portion, and having a screwdriver tip engaging means formed therein, and said threaded portion of said security stud being divided into two portions, one having self-threading wood type threads located on the point of said threaded portion of said screw and the second portion having machine type screw threads located between the head portion of said screw and said self-threading wood type threads.
Claim 2
Dependent Claim
139 words
A hinge security stud comprising: an elongated screw having an elongated threaded portion, a head portion and a stud portion, said head portion having a pair of oppositely disposed back-to-back of said bevelled portions tapering of annular bevelled portions, one inwardly in the direction of said threaded portion and the second of said bevelled portions tapering inwardly in said stud direction, and said stud portion being an elongated generally cylindrical member intersecting said second annular, bevelled portion, and having a screwdriver tip engaging means formed therein, and said threaded portion of said security stud being divided into two portions, one having self-threading wood type threads located on the point of said threaded portion of said screw and the second portion having machine type screw threads located between the head portion of said screw and said self-threading wood type threads.
Claim 3
Dependent Claim
21 words
The apparatus in accordance with claim 1, in which said screwdriver tip engaging means is a slot in said stud portion.
Claim 4
Dependent Claim
17 words
The apparatus in accordance with claim 1, in which said hinge security stud is made of steel.
Claim 5
Dependent Claim
28 words
The apparatus in accordance with claim 1, in which said elongated screw threaded portion has a spacing between said self-threading wood type threads and said machine type threads.
References Cited (Backward Citations)
US742525A
Cited
US1126531A
Cited
US1190069A
Cited
US1923721A
Cited
DE733821C
Cited
US3031049A
Cited
US3337925A
Cited
US3937506A
Cited
US3970340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |