Patent US3613831A successfully refreshed from Google Patents.
US3613831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder scaffold
Assignee: Individual
•
Filing: 1969-10-27
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Granted: 1971-10-19
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Expires: 1989-10-27
Abstract
Abstract A scaffold is provided which employs as its platform portion a conventional straight-type ladder. The invention includes a pair of end leg assemblies each having a channel-shaped upper head portion for receiving end portions of the ladder therein and for connecting the leg assemblies to the ladder. The leg assemblies have a reinforcing crosspiece from which a strut angularly extends. Such struts have clamps at their free end for releasably engaging rungs of the ladder for holding the leg assemblies in fixed position relative to the ladder.
Inventors
- 👤 Everett C Estep
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:10
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/38; E06C1/39
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
A scaffold construction arranged to employ a straight-type ladder having side rails and a plurality of rungs, comprising a. a pair of leg assemblies one for each end of a ladder, b. each of said leg assemblies having a pair of legs integrated at its upper ends to a crosshead on which one end of the straight-type ladder is arranged to be supported and form the platform portion of the scaffold, c. said crossheads having upturned walls adjacent each of their ends to form U-shaped housings to receive the ladder, d. fastening means extendiNg through said upturned walls arranged to project through the rails of said ladder for releasably securing said crossheads to the ladder, e. a cross brace in each leg assembly secured between each of said respective pairs of legs in a position below said crossheads, f. and a strut member in each of said leg assemblies having opposite ends, g. one of the ends of said strut members being secured to a respective cross brace and the other end of said strut members being arranged to be secured to an intermediate portion of the ladder to form an angled reinforcing member.
Claim 2
Dependent Claim
194 words
A scaffold construction arranged to employ a straight-type ladder having side rails and a plurality of rungs, comprising a. a pair of leg assemblies one for each end of a ladder, b. each of said leg assemblies having a pair of legs integrated at its upper ends to a crosshead on which one end of the straight-type ladder is arranged to be supported and form the platform portion of the scaffold, c. said crossheads having upturned walls adjacent each of their ends to form U-shaped housings to receive the ladder, d. fastening means extendiNg through said upturned walls arranged to project through the rails of said ladder for releasably securing said crossheads to the ladder, e. a cross brace in each leg assembly secured between each of said respective pairs of legs in a position below said crossheads, f. and a strut member in each of said leg assemblies having opposite ends, g. one of the ends of said strut members being secured to a respective cross brace and the other end of said strut members being arranged to be secured to an intermediate portion of the ladder to form an angled reinforcing member.
Claim 3
Dependent Claim
13 words
The scaffold construction of claim 1 wherein said fastening means comprises a bolt.
Claim 4
Dependent Claim
30 words
The scaffold construction of claim 1 including releasable clamp means on said other ends of said strut members for releasably securing said strut members to intermediate rungs of the ladder.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |