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US4440263A Expired / Lapsed US ⏱️ 0.0 years remaining

Attachment to a ladder

Assignee: Individual
•
Filing: 1981-06-26
•
Granted: 1984-04-03
•
Expires: 2001-06-26
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Abstract

Abstract A ladder attachment includes a telescopic cross-bar 1A, 2A the ends of which carry wheels 3A for engaging a wall on either side of the ladder. This provides stability and also sets the ladder back from the wall. The center portion 1A of the cross-bar has a pair of hooks 4A which hook over a rung 5A of the ladder and a pair of turnbuckles 9 which hook under a lower rung 12 (after which the turnbuckles 9 are tightened to secure the fixing). The turnbuckles are attached to a sleeve 10 carried by the bar 1A and have hooks 11. A platform assembly 30 can also be mounted on the ladder and connected to the ladder attachment by support struts. The platform assembly includes a support framework 32 in which slots 33 are provided to overlie two rungs 34 and a turnbuckle 35 tightens the framework against the ladder. The ladder attachment can carry a pulley by which goods can be hoisted to the person working on the ladder. The ladder attachment provides stability to the ladder and the platform, if used enables a greater area to be made available to the person on the ladder. A spacer (50-55) device can be temporarily mounted at the top of the ladder to space it from a wall and permit fitment of the ladder attachment to the ladder.

Inventors

  • 👤 Samuel D. Smith

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 11:02
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48; E06C7/16; E06C7/484; E06C7/50

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 73 words
A ladder attachment comprising an elongate cross-bar whose length is greater than the width of the ladder, attachment means mounted on the cross-bar for securing the cross-bar to at least two rungs of the ladder, a platform assembly which includes a framework having recesses for engagement with at least one other ladder rung extending below said two rungs and supporting a platform member, and support means connecting the platform assembly to the cross-bar.
Claim 2
Dependent Claim 73 words
A ladder attachment comprising an elongate cross-bar whose length is greater than the width of the ladder, attachment means mounted on the cross-bar for securing the cross-bar to at least two rungs of the ladder, a platform assembly which includes a framework having recesses for engagement with at least one other ladder rung extending below said two rungs and supporting a platform member, and support means connecting the platform assembly to the cross-bar.
Claim 3
Dependent Claim 33 words
A platform assembly as claimed in claim 1 wherein said cross-bar comprises a central tubular member and a pair of outer wall-engageable members telescopically mounted in the central member and adjustably locatable therein.
Claim 4
Dependent Claim 58 words
A platform assembly as claimed in claim 1 or 2 wherein said attachment means comprising at least one hook-shaped member for engaging one rung and a pair of turnbuckles which at one end are mounted on the cross-bar and at their other end have hooks for engaging another rung, such that the cross-bar lies between said two rungs.
Claim 5
Dependent Claim 27 words
A ladder attachment as claimed in claim 1, in which the turnbuckles are fixedly mounted on a sleeve rotatably carried by the central member of the cross-bar.
Claim 6
Dependent Claim 31 words
A platform assembly as claimed in claim 1, in which the support means comprises a pair of struts connected to the platform member and to bracket means mounted on the cross-bar.
Claim 7
Dependent Claim 30 words
A platform assembly as claimed in claim 5, in which the platform member is pivotal upwardly relative to the ladder and the struts are slidably located in the bracket means.
Claim 8
Dependent Claim 24 words
A platform assembly as claimed in claim 1 in which the platform member has a width approximately three times the width of the ladder.

References Cited (Backward Citations)

US1645879A Cited
US3072218A Cited
GB1074780A Cited
US3318416A Cited
US3773143A Cited
US4359138A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-04-03 1987-10-03 1988-04-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-04-03 1991-10-03 1992-04-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-04-03 1995-10-03 1996-04-03 $7700.00 Window Closed / Lapsed

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