US4070049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security door guard
Assignee: Individual
•
Filing: 1976-01-05
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Granted: 1978-01-24
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Expires: 1996-01-05
Abstract
Abstract A security door guard in the form of a foldable and telescoping brace connected between the inside face of a door and an adjacent supporting surface such as a wall. The brace includes two tubular sections hinged in the middle and connectible at opposite ends with the inside face of the door and the adjacent wall surface to provide a rigid prop or brace to prevent unauthorized opening of the door. The section of the brace connected with the door includes a telescoping portion which is shown in two forms for allowing partial opening of the door from the inside.
Inventors
- 👤 Jack J. Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:24
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/003; E05C19/004; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/282; Y10T292/65; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5168
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A security door guard to preclude unauthorized entry through a door comprising: a first tubular section; a second tubular section; means providing a hinge connection between said first and second sections at adjacent ends thereof; locking means for rigidly securing said first and second sections together against folding comprising a sleeve movable within said sections at said connected adjacent ends; means for permitting said door guard to be reduced in length a predetermined amount for partially opening said door while holding said door against further opening; means for securing a free end of one of said sections with a face of a door; and means for securing a free end of the other of said sections with a supporting surface spaced from said door.
Claim 2
Dependent Claim
124 words
A security door guard to preclude unauthorized entry through a door comprising: a first tubular section; a second tubular section; means providing a hinge connection between said first and second sections at adjacent ends thereof; locking means for rigidly securing said first and second sections together against folding comprising a sleeve movable within said sections at said connected adjacent ends; means for permitting said door guard to be reduced in length a predetermined amount for partially opening said door while holding said door against further opening; means for securing a free end of one of said sections with a face of a door; and means for securing a free end of the other of said sections with a supporting surface spaced from said door.
Claim 3
Dependent Claim
202 words
A security door guard to preclude unauthorized entry through a door comprising: a first tubular section; means for pivotally connecting a first end of said first section to a supporting surface spaced from an inside face of said door; a second tubular section including two telescoping portions for varying the length of said second section, one of said portions having a locking pawl operable with the other of said portions to lock second section at a desired length for partially opening said door; means for pivotally connecting a first end of said second section to the inside face of said door; hinge means for connecting adjacent second ends of said first and second sections together for folding said sections from a first rigid lock relationship to a folded unlock relationship; a locking sleeve within one of said sections and movable partially into the other of said sections at said second ends of said sections to lock said sections against folding; operator knob means on said lock sleeve for moving said sleeve from a release position in said one of said sections to a lock position in both of said sleeves; and spring means for biasing said locking sleeve toward said lock position.
Claim 4
Dependent Claim
202 words
A security door guard to preclude unauthorized entry through a door comprising: a first tubular section; means for pivotally connecting a first end of said first section to a supporting surface spaced from an inside face of said door; a second tubular section including two telescoping portions for varying the length of said second section, one of said portions having a locking pawl operable with the other of said portions to lock second section at a desired length for partially opening said door; means for pivotally connecting a first end of said second section to the inside face of said door; hinge means for connecting adjacent second ends of said first and second sections together for folding said sections from a first rigid lock relationship to a folded unlock relationship; a locking sleeve within one of said sections and movable partially into the other of said sections at said second ends of said sections to lock said sections against folding; operator knob means on said lock sleeve for moving said sleeve from a release position in said one of said sections to a lock position in both of said sleeves; and spring means for biasing said locking sleeve toward said lock position.
Claim 5
Dependent Claim
23 words
A security door guard in accordance with claim 2 including means for releasing said locking sleeve from the outside face of said door.
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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |