US4069890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for leveling a ladder
Assignee: Individual
•
Filing: 1976-04-20
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Granted: 1978-01-24
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Expires: 1996-04-20
Abstract
Abstract The present device includes a plurality of shim-like members which are fastened at one end through a stud, or an elongated bolt, or a riveted assembly to a baseboard and are free to rotate about the stud, bolt or rivet. The shim-like members can be moved into and out of a stacked arrangement with other shim-like members which in effect raises or lowers the top of the stack. A stack of said shim-like members can be located under one of the legs of a ladder (or both legs, if two stacks are used) in order to enable the rungs of a ladder to be level with respect to the ground or some other base.
Inventors
- 👤 Lenius H. Gottliebsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:43
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A device for leveling a ladder which has at least first and second legs and which has the lower end of said first leg located a certain distance above the base upon which said second leg is resting, said device formed to be inserted under said first leg to simulate a base located at the same height as the base upon which said second leg is resting comprising in combination: a plurality of shim-like members, each of which has an aperture formed therein; intercoupling means formed to be disposed into said apertures to couple said shim-like members into a stack to be inserted under said first leg; said intercoupling means and said apertures further formed and disposed so that said shim-like members can be rotated off said stack to be inserted under said first leg whereby the height of said stack can decreased or increased for approximate said certain distance.
Claim 2
Independent Claim
150 words
A device for leveling a ladder which has at least first and second legs and which has the lower end of said first leg located a certain distance above the base upon which said second leg is resting, said device formed to be inserted under said first leg to simulate a base located at the same height as the base upon which said second leg is resting comprising in combination: a plurality of shim-like members, each of which has an aperture formed therein; intercoupling means formed to be disposed into said apertures to couple said shim-like members into a stack to be inserted under said first leg; said intercoupling means and said apertures further formed and disposed so that said shim-like members can be rotated off said stack to be inserted under said first leg whereby the height of said stack can decreased or increased for approximate said certain distance.
Claim 3
Dependent Claim
28 words
A device for leveling a ladder according to claim 1, wherein said shim-like members are composition roof shingles having small stones imbedded in at least one surface thereof.
Claim 4
Dependent Claim
41 words
A device for leveling a ladder according to claim 1 wherein a first group of said shim-like members located in the upper section have progressively shorter lengths so that when said first group is stacked, its profile forms a ramp-like cofiguration.
Claim 5
Dependent Claim
42 words
A device for leveling a ladder, according to claim 1, wherein said shim-like members are formed to have varying thicknesses whereby said distance can be more closely approximated by selected shim-like members of varying thicknesses to make up said remaining shim-like members.
Claim 6
Dependent Claim
19 words
A device for leveling a ladder, according to claim 1, wherein said shim-like members are formed to be corrugated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |