Patent US5325936A successfully refreshed from Google Patents.
US5325936A
Expired / Lapsed
US
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Ladder leveler
Assignee: Individual
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Filing: 1993-06-11
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Granted: 1994-07-05
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Expires: 2013-06-11
Abstract
Abstract A ladder leveler device to level and stabilize a ladder on an uneven surface, comprising a generally rectangular shaped base plate having a plurality of threaded holes located on each wide end, a plurality of hollow jack screws complimentary to and threading through the plurality of threaded holes on each wide end, a plurality of Allen head bolts reposing freely within the hollow jack screws, washers and lock-nuts on the plurality of Allen head bolts, a square tubular guide attaching longitudinally to the center of the rectangular shaped base plate, a square tubular shaft which is slidable within the square tubular guide, a plurality of longitudinally aligned holes in the center of one longitudinal side of the square tubular shaft, a restraint on one end of the square tubular shaft, a longitudinal cut-out in the center of the side of the square tubular shaft opposite the longitudinal side with the plurality of longitudinally aligned holes, a pivoting foot securing to the square tubular shaft by means of a bolt, a plurality of spacers and a locknut, and a spring biased pin means attaching to the center of the square tubular guide having a circular shaft extending through the square tubular guide, the longitudinal cutout, the plurality of longitudinally aligned holes, and a complimentary hole on the square tubular guide opposite where the spring biased pin means is mounted.
Inventors
- 👤 Gerald Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:48
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
195 words
Ladder leveler device comprising: generally rectangular shaped base plate; the base plate having a plurality of threaded holes; a plurality of hollow jack screws which are complimentary to and thread through the plurality of threaded holes in the base plate; a plurality of Allen head bolts, washers and lock-nuts which bolts repose freely within the hollow jack screws; a longitudinally disposed square tubular guide attached to the center of base plate; a square tubular shaft which is slidable within the square tubular guide; a plurality of longitudinally aligned holes on one longitudinal side of the square tubular shaft; a restraint through the square tubular shaft located at an end of the square tubular shaft where the plurality of longitudinally aligned holes commence; a longitudinal cut-out of the center of the longitudinal side of the square tubular shaft opposite the longitudinal side of the square tubular shaft containing the plurality of longitudinally aligned holes; a pivoting foot secured to an end of the square tubular shaft opposite the end of the square tubular shaft where the plurality of longitudinally aligned holes commence; a spring biased pin means attached to the center of the square tubular guide.
Claim 2
Dependent Claim
195 words
Ladder leveler device comprising: generally rectangular shaped base plate; the base plate having a plurality of threaded holes; a plurality of hollow jack screws which are complimentary to and thread through the plurality of threaded holes in the base plate; a plurality of Allen head bolts, washers and lock-nuts which bolts repose freely within the hollow jack screws; a longitudinally disposed square tubular guide attached to the center of base plate; a square tubular shaft which is slidable within the square tubular guide; a plurality of longitudinally aligned holes on one longitudinal side of the square tubular shaft; a restraint through the square tubular shaft located at an end of the square tubular shaft where the plurality of longitudinally aligned holes commence; a longitudinal cut-out of the center of the longitudinal side of the square tubular shaft opposite the longitudinal side of the square tubular shaft containing the plurality of longitudinally aligned holes; a pivoting foot secured to an end of the square tubular shaft opposite the end of the square tubular shaft where the plurality of longitudinally aligned holes commence; a spring biased pin means attached to the center of the square tubular guide.
Claim 3
Dependent Claim
26 words
Ladder leveler device according to claim 1 wherein said generally rectangular shaped base plate includes a width of four inches and a length of eight inches.
Claim 4
Dependent Claim
142 words
Ladder leveler device according to claim 1 wherein said plurality of threaded holes includes eight one-quarter inch threaded holes, said holes being located four each on each wide end of the base plate with the first of the four holes located 5/8 inches on center from both the wide edge and the long edge of the rectangular shaped base plate, the second of the four holes located 5/8 inches on center from the first hole, the third of the four holes located 15/8 inches on center from the second hole, and the fourth of the four holes located 5/8 inches on center from the third hole and the long edge opposite the first hole, the four remaining holes are situated in the same manner on the wide end of the rectangular shaped base plate opposite the location of the first four holes.
Claim 5
Dependent Claim
46 words
Ladder leveler device according to claim 1 wherein said plurality of longitudinally aligned holes on one longitudinal side of the square shaft include extending at 3/4 inches each on center for a length of 93/4 inches beginning 3/4 inches from one end of the square shaft.
Claim 6
Dependent Claim
31 words
Ladder leveler device according to claim 1 wherein said plurality of longitudinally aligned holes on one longitudinal side of the square shaft include a plurality of longitudinally aligned 9/32 inch holes.
Claim 7
Dependent Claim
95 words
Ladder leveler device according to claim 1 wherein said longitudinal cut-out of the center of the side of the square tubular shaft includes a 1/2 inch longitudinal cut-out of the center of the side of the square tubular shaft opposite the side containing the plurality of longitudinally aligned holes, which longitudinal cut-out extends from the end of the square tubular shaft from the end of the square shaft where the plurality of longitudinally aligned holes commence a distance commensurate with the longitudinal distance on the square tubular shaft of the plurality of longitudinally aligned holes.
Claim 8
Dependent Claim
48 words
Ladder leveler device according to claim 1 wherein said pivoting foot secured to the end of the square tubular shaft opposite the end of the square tubular shaft where the plurality of longitudinally aligned holes commence includes means of a bolt, a plurality of spacers and a locknut.
Claim 9
Dependent Claim
63 words
Ladder leveler device according to claim 1 wherein said spring biased pin means attached to the center of the square tubular guide include a shaft extending through the square tubular guide, the plurality of longitudinally aligned holes and the longitudinal cut-out, and through a complimentary hole on the side of the square tubular guide opposite where the spring biased pin means is mounted.
References Cited (Backward Citations)
US2936849A
Cited
US4423797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |