US4095671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable self-locking level support
Assignee: UTILITY PRODUCTS Inc
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Filing: 1974-02-01
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Granted: 1978-06-20
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Expires: 1994-02-01
Abstract
Abstract The invention relates to a self-locking level support primarily for ladders and the like, the support being adjustable to fit ladders of different widths.
Inventors
- 👤 David E. Forristall
- 👤 Allen C. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:34
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
144 words
A self-locking level support applicable to ladders or the like of different widths comprising a two part U-shape housing with one part slidably overlapping the other to form an adjustable bridge between the two legs of said housing, a pressure responsive self-locking assembly in each leg of said housing, each said self-locking assembly including means, in the absence of pressure on said assembly, for establishing and maintaining an unlocked condition thereof, a leg extension extending from a leg of said U-shape housing in slidable relationship therewith and in pressure transfer relationship with the proximate pressure responsive self-locking assembly, a similar leg extension likewise extending from the other leg of said U-shape housing in slidable relationship and in pressure transfer relationship with the proximate pressure responsive self-locking assembly, and pressure transfer means installed between said pressure responsive self-locking assemblies and in pressure transfer relationship therewith.
Claim 2
Dependent Claim
144 words
A self-locking level support applicable to ladders or the like of different widths comprising a two part U-shape housing with one part slidably overlapping the other to form an adjustable bridge between the two legs of said housing, a pressure responsive self-locking assembly in each leg of said housing, each said self-locking assembly including means, in the absence of pressure on said assembly, for establishing and maintaining an unlocked condition thereof, a leg extension extending from a leg of said U-shape housing in slidable relationship therewith and in pressure transfer relationship with the proximate pressure responsive self-locking assembly, a similar leg extension likewise extending from the other leg of said U-shape housing in slidable relationship and in pressure transfer relationship with the proximate pressure responsive self-locking assembly, and pressure transfer means installed between said pressure responsive self-locking assemblies and in pressure transfer relationship therewith.
Claim 3
Dependent Claim
51 words
A self-locking level support in accordance with claim 1, characterized by said two part housing being formed of tubing sections with said sections telescoping to form said bridge of adjustable length, and said pressure responsive self-locking assemblies, said leg extensions and said pressure transfer means being slidably installed in said housing.
Claim 4
Dependent Claim
19 words
A self-locking level support in accordance with claim 1, characterized by a length adjustable rung supportable between said legs.
Claim 5
Dependent Claim
48 words
A self-locking level support in accordance with claim 3, characterized by said length adjustable rung including a yoke at each end adapted to straddle the proximate leg of said U-shape housing, and means for affixing said adjustable rung via said yokes to the side rails of a ladder.
References Cited (Backward Citations)
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Cited
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Cited
US2835427A
Cited
US2894670A
Cited
US2969126A
Cited
US3102606A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |