US5816364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder leveling apparatus
Assignee: Individual
•
Filing: 1997-07-14
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Granted: 1998-10-06
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Expires: 2017-07-14
Abstract
Abstract A ladder leveling apparatus 10 including a ladder member 20 having ladder legs 21 that are received in a ladder leg adapter unit 12 including boot members 30 wherein the position of the bottom of the ladder legs 21 relative to the boot members 30 are controlled by elongated adjustment rod members 40 having an enlarged head member 44 which is actuated proximate the upper portion of the ladder member 20.
Inventors
- 👤 Cynthia Christy
- 👤 Mark Christy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
359 words
The A ladder leveling apparatus for use with a ladder member having a pair of ladder legs each having an upper end, an intermediate portion, and a lower end connected together by a plurality of ladder steps comprising: a ladder foot adapter unit comprising boot members dimensioned to slidably receive the lower end of the ladder legs; and an adjustment unit comprising a plurality of elongated adjustment rod members wherein each rod member has a threaded lower end, an upper end provided with an enlarged head, and an intermediate portion; wherein, the upper end of each of the adjustment rod members is operatively connected to the upper end of each of the ladder legs, the lower end of each of the adjustment rod members is operatively connected to a portion of one of the boot members for varying the location of the lower end of each ladder leg relative to their respective boot member and the intermediate portion of each of the adjustment rod members is connected to the intermediate portion of each of the ladder leg members; and at least one bubble level operatively associated with one of the upper steps of the ladder member proximate the upper end of the adjustment rod member wherein each boot member has a lower enlarged foot element and an upper portion dimensioned to slidably receive the ladder leg, the upper portion of the boot member is provided with an outwardly projecting bracket which is dimensioned to threadably receive the lower end of the adjustment rod member, the upper end of each ladder leg is provided with an outwardly projecting bracket member that is dimensioned to rotatably receive the upper end of the adjustment rod member, the intermediate portion of each ladder leg is further provided with another outwardly projecting bracket member which is dimensioned to rotatably receive the intermediate portion of the adjustment rod member, and the enlarged head member is contoured to form a keyway dimensioned to receive a power tool bit whereby the user can adjust the position of the lower end of each ladder leg relative to each boot member from the upper end of the ladder member.
Claim 2
Dependent Claim
359 words
The A ladder leveling apparatus for use with a ladder member having a pair of ladder legs each having an upper end, an intermediate portion, and a lower end connected together by a plurality of ladder steps comprising: a ladder foot adapter unit comprising boot members dimensioned to slidably receive the lower end of the ladder legs; and an adjustment unit comprising a plurality of elongated adjustment rod members wherein each rod member has a threaded lower end, an upper end provided with an enlarged head, and an intermediate portion; wherein, the upper end of each of the adjustment rod members is operatively connected to the upper end of each of the ladder legs, the lower end of each of the adjustment rod members is operatively connected to a portion of one of the boot members for varying the location of the lower end of each ladder leg relative to their respective boot member and the intermediate portion of each of the adjustment rod members is connected to the intermediate portion of each of the ladder leg members; and at least one bubble level operatively associated with one of the upper steps of the ladder member proximate the upper end of the adjustment rod member wherein each boot member has a lower enlarged foot element and an upper portion dimensioned to slidably receive the ladder leg, the upper portion of the boot member is provided with an outwardly projecting bracket which is dimensioned to threadably receive the lower end of the adjustment rod member, the upper end of each ladder leg is provided with an outwardly projecting bracket member that is dimensioned to rotatably receive the upper end of the adjustment rod member, the intermediate portion of each ladder leg is further provided with another outwardly projecting bracket member which is dimensioned to rotatably receive the intermediate portion of the adjustment rod member, and the enlarged head member is contoured to form a keyway dimensioned to receive a power tool bit whereby the user can adjust the position of the lower end of each ladder leg relative to each boot member from the upper end of the ladder member.
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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) | 2001-10-05 | 2002-04-06 | 2002-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-05 | 2006-04-06 | 2006-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-05 | 2010-04-06 | 2010-10-06 | $7700.00 | Window Closed / Lapsed |