Patent US5615752A successfully refreshed from Google Patents.
US5615752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder-leveling platform assembly
Assignee: Individual
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Filing: 1995-12-26
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Granted: 1997-04-01
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Expires: 2015-12-26
Abstract
Abstract A base, supported on a platform, has a plate pivotably coupled therein, and side walls of the base are apertured to receive rods. The rods maintain the plate in a selected inclination, as they are fitted through the apertures and hold the plate in position. The plate receives one upright of a ladder, in order to make the upright level with the other upright of the ladder on pitched ground, or uneven bearing surfaces, in which the two uprights cannot otherwise bear on a common-level surface.
Inventors
- 👤 Leonard Wassil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A ladder-leveling platform assembly, comprising: a platform; and a base centrally located and supported on said platform; wherein said base has a pair of parallel, side walls; and a plate fully confined within said base; means engaging said plate and said side walls for accommodating a selected inclination of said plate; and said base has a series of apertures, formed therein, for receiving rods therethrough for maintaining said plate at a selected inclination; wherein said plate comprises only a flat, thin element having (a) an axle, and (b) means fastened to said element for confrontingly engaging only an outermost and lowermost, side portion of a ladder upright; said platform comprises outrigger means for providing lateral stability for said base and assembly to resist any tipping over of said assembly; wherein said outrigger means comprises lateral portions of said platform which outreach from said base and define said platform with a width which is greater than said base.
Claim 2
Dependent Claim
157 words
A ladder-leveling platform assembly, comprising: a platform; and a base centrally located and supported on said platform; wherein said base has a pair of parallel, side walls; and a plate fully confined within said base; means engaging said plate and said side walls for accommodating a selected inclination of said plate; and said base has a series of apertures, formed therein, for receiving rods therethrough for maintaining said plate at a selected inclination; wherein said plate comprises only a flat, thin element having (a) an axle, and (b) means fastened to said element for confrontingly engaging only an outermost and lowermost, side portion of a ladder upright; said platform comprises outrigger means for providing lateral stability for said base and assembly to resist any tipping over of said assembly; wherein said outrigger means comprises lateral portions of said platform which outreach from said base and define said platform with a width which is greater than said base.
Claim 3
Dependent Claim
48 words
A ladder-leveling platform assembly, according to claim 1, wherein: said side walls have slots formed therein; ends of said axle are slidably engaged with said slots; and said slots and said axle comprise means cooperative for (a) elevating said plate, and (b) lowering said plate within said base.
Claim 4
Dependent Claim
24 words
A ladder-leveling platform assembly, according to claim 1, wherein: said apertures are formed in said walls in adjacency to opposite ends of said walls.
Claim 5
Dependent Claim
24 words
A ladder-leveling platform assembly, according to claim 1, wherein: said upright-engaging means comprises at least one block coupled to, and extending across, said plate.
Claim 6
Dependent Claim
21 words
A ladder-leveling platform assembly, according to claim 1, wherein: an end of said plate is pivotably coupled to said side walls.
Claim 7
Dependent Claim
33 words
A ladder-leveling platform assembly, according to claim 1, wherein: said platform has an underlying surface for setting upon a bearing surface; and said underlying surface has means for frictionally gripping a bearing surface.
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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) | 2000-03-31 | 2000-09-30 | 2001-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-31 | 2004-09-30 | 2005-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-31 | 2008-09-30 | 2009-04-01 | $7700.00 | Window Closed / Lapsed |