Patent US331212A successfully refreshed from Google Patents.
US4438640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable door brace
Assignee: Individual
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Filing: 1983-09-13
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Granted: 1984-03-27
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Expires: 2003-09-13
Abstract
Abstract A door brace is disclosed adapted to interengage a door and a floor beneath the door and prevent unauthorized entry through the door. The brace comprises sections interconnected substantially end-to-end and collapsible with respect to each other into a compact form. One end section of the prop member has means adapted to engage the door, while the other end section has pivotally mounted base means adapted to engage the floor. Optionally, the prop member has lock means adapted to extend from the prop member to an exterior side of the door where the lock means is operable for locking or unlocking. The prop member may also have pressure-sensitive means adapted to signal a warning upon pressure upon the prop member due to unauthorized attempt to open the door.
Inventors
- 👤 Robert E. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:07
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/003; E05C19/004; Y; Y10; Y10T; Y10T292/00; Y10T292/65; Y10T292/67; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5168
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A door brace adapted to interengage a door knob or the like on a door and a floor beneath the door comprising: a plurality of sections interconnected substantially end-to-end and collapsible with respect to each other into a compact form; means adapted to engage the door knob or the like on the door formed in one end section of said plurality of sections; and base means formed in the other end section of said plurality of sections, said base means including a main body, means for releasably securing said main body to said other end section, roller means rotatably retained within said main body and movable between a first position wherein said roller means extends below the bottom edge of said main body and a second position wherein said roller means does not extend below the bottom edge of said body, and means for urging said roller means toward said first position such that said roller means normally extends below the bottom edge of said main body.
Claim 2
Dependent Claim
167 words
A door brace adapted to interengage a door knob or the like on a door and a floor beneath the door comprising: a plurality of sections interconnected substantially end-to-end and collapsible with respect to each other into a compact form; means adapted to engage the door knob or the like on the door formed in one end section of said plurality of sections; and base means formed in the other end section of said plurality of sections, said base means including a main body, means for releasably securing said main body to said other end section, roller means rotatably retained within said main body and movable between a first position wherein said roller means extends below the bottom edge of said main body and a second position wherein said roller means does not extend below the bottom edge of said body, and means for urging said roller means toward said first position such that said roller means normally extends below the bottom edge of said main body.
Claim 3
Dependent Claim
17 words
The invention defined in claim 1 wherein said sections telescope together in collapsing to said compact form.
Claim 4
Dependent Claim
18 words
The invention defined in claim 2 further including releasable lock means to secure one section relative to another.
Claim 5
Dependent Claim
32 words
The invention defined in claim 2 further including means for longitudinally adjusting said interconnected sections with respect to each other such that the overall length of said door brace can be varied.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |