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US4580660A Expired / Lapsed US ⏱️ 0.0 years remaining

Ladder attachment

Assignee: Individual
•
Filing: 1984-01-03
•
Granted: 1986-04-08
•
Expires: 2004-01-03
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Abstract

Abstract A stabilizing attachment for a ladder intended to make the ladder safer to use. The attachment includes a fixture capable of being secured at a selected position along the length of the ladder and support means comprising a cross member extending parallel to the rungs of the ladder and a pair of parallel struts coupling the cross member to the fixture. The support means can be arranged in either of two positions; in one position, the struts extend at right angles to the uprights of the ladder while in the other the struts extend parallel to the uprights. In either case, the cross member makes line contact with the structure against which the ladder is placed and the cross member may be provided with a friction-engendering surface to inhibit slipping of the cross member on the structure.

Inventors

  • 👤 Morris Oling

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 14:57
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 240 words
An attachment for a ladder, comprising: a fixture capable of being secured at a selected position along the length of the ladder and comprising a pair of inwardly facing channel members adapted to embrace respective uprights of the ladder at outer sides thereof, a brace connecting said members, and means engageable with an appropriate rung of the ladder and adapted to locate the fixture at a said selected position; support means comprising a cross member of a length corresponding at least to the width of the ladder and intended to lie in line contact with a structure against which the ladder is placed and extend generally parallel to the rungs of the ladder, and a pair of spaced parallel struts coupled to and extending generally normally from said cross member in positions spaced therealong to corresponding generally with the spacing of said channel members; and, coupling means adapted to removably secure the said support means to the fixture in either of a first fixed position in which the struts extend generally normally with respect to the ladder uprights and the cross member is spaced outwardly of the rungs, and a second fixed position in which the struts are generally parallel to the uprights and the cross member is generally in line with the rungs said coupling means permitting adjustment of the support means between its said first and second position only after removal of the support means from the fixture.
Claim 2
Dependent Claim 240 words
An attachment for a ladder, comprising: a fixture capable of being secured at a selected position along the length of the ladder and comprising a pair of inwardly facing channel members adapted to embrace respective uprights of the ladder at outer sides thereof, a brace connecting said members, and means engageable with an appropriate rung of the ladder and adapted to locate the fixture at a said selected position; support means comprising a cross member of a length corresponding at least to the width of the ladder and intended to lie in line contact with a structure against which the ladder is placed and extend generally parallel to the rungs of the ladder, and a pair of spaced parallel struts coupled to and extending generally normally from said cross member in positions spaced therealong to corresponding generally with the spacing of said channel members; and, coupling means adapted to removably secure the said support means to the fixture in either of a first fixed position in which the struts extend generally normally with respect to the ladder uprights and the cross member is spaced outwardly of the rungs, and a second fixed position in which the struts are generally parallel to the uprights and the cross member is generally in line with the rungs said coupling means permitting adjustment of the support means between its said first and second position only after removal of the support means from the fixture.
Claim 3
Dependent Claim 29 words
An attachment as claimed in claim 1, wherein said cross member is provided with a friction-engendering surface for engagement with a said structure against which the ladder is placed.
Claim 4
Dependent Claim 21 words
An attachment as claimed in claim 2, wherein said friction-engendering is provided by a resilient sleeve secured to said cross member.
Claim 5
Dependent Claim 36 words
An attachment as claimed in claim 1, wherein said struts are arranged to extend generally tangentially with respect to said cross member with the cross member disposed below the struts when the attachment is in use.
Claim 6
Dependent Claim 56 words
An attachment as claimed in claim 1, wherein said coupling means comprise captive nuts on outer surfaces of said channel members and bolts engageable with said nuts through openings in said struts, said nuts being arranged in a configuration permitting coupling of the struts to said cross members in either of said first and second positions.
Claim 7
Dependent Claim 38 words
An attachment as claimed in claim 5, wherein said struts are U-shaped channels and are arranged with their channels facing inwardly and adapted to engage over said captive nuts when the support means is fitted to the fixture.
Claim 8
Dependent Claim 37 words
An attachment as claimed in claim 1, wherein said means engageable with an appropriate rung of the ladder comprises a generally U-shaped locating element removably secured to said brace and adapted to embrace a said ladder rung.
Claim 9
Dependent Claim 30 words
An attachment as claimed in claim 7, wherein said brace is disposed within said U-shaped element and said brace and element are removably secured together by a nut and bolt.
Claim 10
Dependent Claim 32 words
An attachment as claimed in claim 1 wherein said cross member presents a generally cylindrical surface intended to lie in line contact with a said structure against which the ladder is placed.

References Cited (Backward Citations)

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GB629851A Cited
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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) 1989-04-07 1989-10-07 1990-04-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-04-07 1993-10-07 1994-04-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-04-07 1997-10-07 1998-04-08 $7700.00 Window Closed / Lapsed

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