Patent US4181195A successfully refreshed from Google Patents.
US4181195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder lock
Assignee: Individual
•
Filing: 1978-02-13
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Granted: 1980-01-01
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Expires: 1998-02-13
Abstract
Abstract A ladder locking device designed for attachment to a frame-mounted ladder. The ladder lock includes a panel dimensioned to cover the front side of the ladder over an area including a plurality of ladder rungs. The upper edge of the panel is bent to form a lip engageable with an upper ladder rung. Attached to a lower portion of the panel is a lock operable to position a locking member into engagement or disengagement with a lower ladder rung, whereby the device is locked to or released from the ladder.
Inventors
- 👤 Clifford R. Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:13
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A ladder locking device for use with a ladder having a pair of side rails and a plurality of rungs supported therebetween, said ladder being permanently mounted against a frame to permit climbing access from the outwardly-facing side of the ladder only, said locking device comprising, an elongate panel dimensioned to cover the outwardly-facing side of the ladder over an area covering a plurality of ladder rungs, the upper edge of said panel forming a lip fastenable to an upper ladder rung, a lock mounted on a lower portion of said panel, means for selectively positioning said lock on said panel to produce a desired spacing between said lock and said lip, and a locking arm attached to said lock, selectively positionable between locking and unlocking positions, wherein said locking arm engages and disengages, respectively, a lower ladder rung.
Claim 2
Dependent Claim
139 words
A ladder locking device for use with a ladder having a pair of side rails and a plurality of rungs supported therebetween, said ladder being permanently mounted against a frame to permit climbing access from the outwardly-facing side of the ladder only, said locking device comprising, an elongate panel dimensioned to cover the outwardly-facing side of the ladder over an area covering a plurality of ladder rungs, the upper edge of said panel forming a lip fastenable to an upper ladder rung, a lock mounted on a lower portion of said panel, means for selectively positioning said lock on said panel to produce a desired spacing between said lock and said lip, and a locking arm attached to said lock, selectively positionable between locking and unlocking positions, wherein said locking arm engages and disengages, respectively, a lower ladder rung.
Claim 3
Dependent Claim
127 words
A ladder locking device for use with a ladder having a pair of side rails and a plurality of rungs supported therebetween, said ladder being permanently mounted against a frame to permit climbing access from the outwardly facing side of the ladder only, said locking device comprising, a first panel section, the upper edge of which forms a lip fastenable to an upper ladder rung, a second panel section including a lock mounted thereon, said second section being adjustably fastenable to said first section to form a single elongate panel having a preselected spacing between said lock and said lip, and a locking arm attached to said lock, selectively positionable between locking and unlocking positions, wherein said locking arm engages and disengages, respectively, a lower ladder rung.
Claim 4
Dependent Claim
127 words
A ladder locking device for use with a ladder having a pair of side rails and a plurality of rungs supported therebetween, said ladder being permanently mounted against a frame to permit climbing access from the outwardly facing side of the ladder only, said locking device comprising, a first panel section, the upper edge of which forms a lip fastenable to an upper ladder rung, a second panel section including a lock mounted thereon, said second section being adjustably fastenable to said first section to form a single elongate panel having a preselected spacing between said lock and said lip, and a locking arm attached to said lock, selectively positionable between locking and unlocking positions, wherein said locking arm engages and disengages, respectively, a lower ladder rung.
Claim 5
Dependent Claim
37 words
The locking device of claim 2 wherein said lock is a swivel lock and said locking arm is spaced inwardly from the plane of said panel and selectively positionable between substantially vertical locking and horizontal unlocking positions.
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) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |