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US5094320A Expired / Lapsed US ⏱️ 0.0 years remaining

Ladder improvement

Assignee: Individual
•
Filing: 1991-01-25
•
Granted: 1992-03-10
•
Expires: 2011-01-25
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Abstract

Abstract A ladder leveling device for a ladder having a pair of side rails with connecting rungs is provided and consists of a pair of U-shaped channel members which are each slideably retained to each side rail. A securing mechanism locks each channel member in its adjustable position to enable the ladder to stand upright upon an uneven/inclined surface.

Inventors

  • 👤 Bernard Deitz
  • 👤 George Spector

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 23:02
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 260 words
A ladder leveling device for a ladder of the type having a pair of side rails with a plurality of connecting rungs, said device comprising: a) a pair of U-shaped channel members, each of which is sized to fit over one of the side rails of the ladder adjacent the lower end thereof; b) means for slideably retaining each of said channel members to each of the side rails of the ladder so that each of said channel members can be independently moved to an adjustable position; and c) means for securing each of said channel members to each of the side rails of the ladder so as to lock each said channel member in its adjustable position to enable the ladder to stand upright upon an uneven/inclined surface; wherein said slideably retaining means includes: d) a pair of elongated threaded rods each of which fits through one of the connecting rungs to extend at each end out past the side rails of the ladder; e) four washers, each to fit over each end of said threaded rods; f) four nuts, each to thread onto each end of said threaded rods so as to hold said threaded rods in place; g) each said channel member having a pair of spaced apart longitudinal elongated slots so that the ends of said threaded rods can fit there through; h) two of said washers, each to fit over each end of one of said threaded rods; and i) two of said nuts, each to thread onto each end of said one threaded rod.
Claim 2
Dependent Claim 260 words
A ladder leveling device for a ladder of the type having a pair of side rails with a plurality of connecting rungs, said device comprising: a) a pair of U-shaped channel members, each of which is sized to fit over one of the side rails of the ladder adjacent the lower end thereof; b) means for slideably retaining each of said channel members to each of the side rails of the ladder so that each of said channel members can be independently moved to an adjustable position; and c) means for securing each of said channel members to each of the side rails of the ladder so as to lock each said channel member in its adjustable position to enable the ladder to stand upright upon an uneven/inclined surface; wherein said slideably retaining means includes: d) a pair of elongated threaded rods each of which fits through one of the connecting rungs to extend at each end out past the side rails of the ladder; e) four washers, each to fit over each end of said threaded rods; f) four nuts, each to thread onto each end of said threaded rods so as to hold said threaded rods in place; g) each said channel member having a pair of spaced apart longitudinal elongated slots so that the ends of said threaded rods can fit there through; h) two of said washers, each to fit over each end of one of said threaded rods; and i) two of said nuts, each to thread onto each end of said one threaded rod.
Claim 3
Dependent Claim 122 words
A ladder leveling device as recited in claim 1, wherein said securing means includes: a) each said channel member having a plurality of vertical spaced apart holes on either side of the upper elongated slot; b) a pair of U-shaped brackets, each having a central aperture and a pair of inwardly facing studs so that each end of the upper threaded rods can fit through each central aperture in each said bracket with the two studs engagable with two of the holes in each said channel member; c) two of said washers, each to fit over each end of the other of aid threaded rods; and d) two of said nuts, each to thread onto each end of said upper threaded rod.
Claim 4
Dependent Claim 172 words
A ladder leveling device as recited in claim 1, wherein said securing means includes: a) each said channel member having a plurality of vertical spaced apart holes on each side flange adjacent the upper elongated slot, each hole countersunk with a recessed track guide therebetween; b) a pair of U-shaped brackets, each having a central aperture and a pair of threaded holes in each side flange thereof, so that each end of the other of said threaded rods can fit through each central aperture of each said bracket; c) the other two of said four washers, each to fit over each end of said other threaded rods; d) the other two of said nuts, each to thread onto each end of said other threaded rods; and e) a pair of wing headed set screws, each threadable into one of the threaded holes in one side flange of said bracket to ride within the track guide and engage with one of the countersunk holes in each side flange of each said channel member.

References Cited (Backward Citations)

US1346831A Cited
US1419748A Cited
AU112531A Cited
US2115395A Cited
US2249304A Cited
US4852689A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-03-10 1995-09-09 1996-03-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-03-10 1999-09-09 2000-03-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-03-10 2003-09-09 2004-03-10 $7700.00 Window Closed / Lapsed

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