US4593790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible ladder stabilizer
Assignee: Individual
•
Filing: 1985-04-17
•
Granted: 1986-06-10
•
Expires: 2005-04-17
Abstract
Abstract A multi-purpose convertible ladder stabilizer, particularly adapted to stabilize the upper free end of ladders such as the extension type during utility in the construction, maintenance, repair, painting of commercial and domestic buildings. The stabilizer is characterized by its portability and function convertibility wherein it may be removably set for disposition as an outside corner clutch, an inside corner engager, a building overhang ladder attachment, window spanner and the like. A coactive relationship is provided between elements wherein interconnected articulable extensions and a ladder during use, irrespective of the geometric vertical configuration of that elevated part of a building which may be considered the workplace.
Inventors
- 👤 James S. Brewer
- 👤 William P. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:58
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48; E06C7/482
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
An extension ladder stabilizer which is convertible to variant configurations for stable contiguous contact with diverse building surface comprising: (A) interconnected articulable extensions; (B) a rigid connector engagable with at least one of said articulable extensions, the connector having at least one removable ladder sidepiece engaging clamp and spacing members on the connector to set the connector at an acute angle which is greater than 90 degrees, relative to a vertical line of the articulable extensions, whereby the stabilizer extensions may conform to the corresponding vertical position of a building surface, irrespective of the angular leaning relation of the ladder to the ground.
Claim 2
Dependent Claim
103 words
An extension ladder stabilizer which is convertible to variant configurations for stable contiguous contact with diverse building surface comprising: (A) interconnected articulable extensions; (B) a rigid connector engagable with at least one of said articulable extensions, the connector having at least one removable ladder sidepiece engaging clamp and spacing members on the connector to set the connector at an acute angle which is greater than 90 degrees, relative to a vertical line of the articulable extensions, whereby the stabilizer extensions may conform to the corresponding vertical position of a building surface, irrespective of the angular leaning relation of the ladder to the ground.
Claim 3
Dependent Claim
21 words
The extension ladder stabilizer of claim 1 wherein at least two of the interconnected extensions are spring-biased relative to each other.
Claim 4
Dependent Claim
36 words
The extension ladder stabilizer according to either claims 1 or 2 wherein two corresponding, intermediately disposed extensions are set at open right angles to each other to form a positive right angle, external corner building engager.
Claim 5
Dependent Claim
34 words
The extension ladder stabilizer according to either claims 1 or 2 wherein two corresponding extensions are set at closed right angles to each other to form a negative right angle internal corner building engager.
Claim 6
Dependent Claim
39 words
The extension ladder stabilizer according to either claims 1 or 2 wherein two corresponding intermediately disposed extensions are set in spaced parallel relation to each other and at right angles to the connector to form a building overhang attachment.
Claim 7
Dependent Claim
26 words
The extension ladder stabilizer according to claim 5 wherein end articulable extensions are set in-line with the intermediate extensions of from therewith an extended overhang attachment.
Claim 8
Dependent Claim
40 words
The extension ladder stabilizer according to either claims 1 or 2 wherein articulable end extensions are set in spaced parallel relation to each other to form with intermediate extensions a spanner to engage exposed windows adjacent opposed frame sides thereof.
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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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |