Patent US4913160A successfully refreshed from Google Patents.
US4706918A
Expired / Lapsed
US
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Ladder accessory
Assignee: WILSON TRADE Ltd
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Filing: 1987-05-01
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Granted: 1987-11-17
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Expires: 2007-05-01
Abstract
Abstract A ladder accessory with an upwardly open receptacle is designed to rest on a rung of a ladder or step-ladder and its shape cooperates with one upright of the ladder prevent transverse movement of the accessory or rotation in either direction relative to the ladder.
Inventors
- 👤 Randall J. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:53
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
Ladder accessory comprising: for use on a sloping ladder, comprising: outer means defining an outer upwardly open receptacle for location on the outside of said ladder, inner means defining an upwardly opening receptacle for location on the inside of said ladder, said inner means being dimensioned to extend between the uprights of said ladder, connecting means connecting said outer and inner means, said outer, inner and connecting means being shaped to define a transverse downwardly open groove wide enough to receive a rung of said ladder, support members on said connecting means for resting on a rung of said ladder when said rung is in said groove, means for cooperation with an upright of said ladder for defining the transverse location of said inner and outer means relative to said ladder with said connecting means extending between said uprights, means for maintaining said inner and outer means in an attitude where they are at approximately the same height when said connection means is located upon said rung.
Claim 2
Dependent Claim
167 words
Ladder accessory comprising: for use on a sloping ladder, comprising: outer means defining an outer upwardly open receptacle for location on the outside of said ladder, inner means defining an upwardly opening receptacle for location on the inside of said ladder, said inner means being dimensioned to extend between the uprights of said ladder, connecting means connecting said outer and inner means, said outer, inner and connecting means being shaped to define a transverse downwardly open groove wide enough to receive a rung of said ladder, support members on said connecting means for resting on a rung of said ladder when said rung is in said groove, means for cooperation with an upright of said ladder for defining the transverse location of said inner and outer means relative to said ladder with said connecting means extending between said uprights, means for maintaining said inner and outer means in an attitude where they are at approximately the same height when said connection means is located upon said rung.
Claim 3
Dependent Claim
62 words
Ladder accessory as claimed in claim 1 wherein a first stop surface on said outer member is designed, when said support member is resting on said rung to contact said ladder upright, below such rung and to limit rotation of said outer member in a direction which is downward relative to said inner member, said maintaining means including said first stop surface.
Claim 4
Dependent Claim
67 words
Ladder accessory as claimed in claim 1 wherein a surface or said outer member is designed, when said support member is resting on said rung, to contact said ladder upright, above said rung, after on a short rotation of said accessory to lower said inner means from a position where said inner and outer means are at equal height, said maintaining means including said first stop surface.
Claim 5
Dependent Claim
67 words
Ladder accessory as claimed in claim 2 wherein a surface or said outer member is designed, when said support member is resting on said rung, to contact said ladder upright, above said rung, after on a short rotation of said accessory to lower said inne means from a position where said inner and outer means are at equal height, said maintaining means including said first stop surface.
Claim 6
Dependent Claim
120 words
Ladder accessory as claimed in claim 1 wherein said support member includes a sloping inwardly facing surface on said outer member, said sloping surface partially defining said downwardly facing groove, and being designed to rest against said ladder upright and to prevent rotation of said accessory in a direction which is downwardly for said outer member, relative to said rung; and a wall on said inner member, partially defining said downwardly facing groove, said wall including at least one notch designed to contact the inner top edge of a step-ladder step when the sloping surface is resting against said ladder upright, to provide a stop against rotation of said accessory in a direction which is downward for said inner means.
Claim 7
Dependent Claim
42 words
Ladder accessory as claimed in claim 5 wherein said notch comprises a downwardly facing surface extending inwardly from the outwardly facing contour of said inner member and an outwardly facing surface extending downward from the inward end of said downwardly facing surface.
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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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |