Patent US4458783A successfully refreshed from Google Patents.
US4458783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof ladder attachment
Assignee: Individual
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Filing: 1982-09-29
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Granted: 1984-07-10
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Expires: 2002-09-29
Abstract
Abstract A ladder attachment consisting of two triangular plates with holes and connecting rods. When connected through the rungs of a conventional extension ladder it forms a frame on the outsides of the ladder that can be adjustably extended over the ridge of a roof. The attachment allows the ladder to conform to the roof's pitch and be secured to the roof's ridge.
Inventors
- 👤 John W. Stakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:36
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/34; E06C1/345; E06C7/00; E06C7/48; E06C7/488
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A ladder attachment comprised of a rigid triangular frame having a pair or spaced parallel triangular side plates connected with rods attachable to the side rails of a ladder having hollow rings wherein each said plate has: one opening position in one angle of the plates for securing first plate to said ladder and to second plate with rod attachment through said opening and through the hollow rung of said ladder; additional openings are positioned in second angle of the plates for securing and adjusting plates to said ladder by means of inserting a rod through said additional openings and additional hollow rung allowing said ladder to conform to pitch of roof and allowing the attachment to extend over the ridge of roof securing the ladder in position on roof; an additional opening is placed in the other angle of the plates for connecting a third rod for securing and stabilizing the two remaining angles of the triangular plates.
Claim 2
Dependent Claim
159 words
A ladder attachment comprised of a rigid triangular frame having a pair or spaced parallel triangular side plates connected with rods attachable to the side rails of a ladder having hollow rings wherein each said plate has: one opening position in one angle of the plates for securing first plate to said ladder and to second plate with rod attachment through said opening and through the hollow rung of said ladder; additional openings are positioned in second angle of the plates for securing and adjusting plates to said ladder by means of inserting a rod through said additional openings and additional hollow rung allowing said ladder to conform to pitch of roof and allowing the attachment to extend over the ridge of roof securing the ladder in position on roof; an additional opening is placed in the other angle of the plates for connecting a third rod for securing and stabilizing the two remaining angles of the triangular plates.
References Cited (Backward Citations)
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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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |