Patent US4754842A successfully refreshed from Google Patents.
US4754842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder safety device
Assignee: WIP TECHNOLOGIES Inc
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Filing: 1988-01-26
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Granted: 1988-07-05
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Expires: 2008-01-26
Abstract
Abstract An anti-slip attachment for each side rail of a ladder, designed to keep the ladder a predetermined distance away from a side wall of a building, has a bevelled end that allows a backing plate attached thereto and on which a resilient pad and a removable cover are mounted, to pivot at an angle of 0°-25° with respect to the axis of the ladder.
Inventors
- 👤 Don L. Southern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:17
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
A safeguard device, for attachment to the upper end of a side rail of a ladder, adapted to rest against a vertical wall of a building, comprising, in combination: (a) an extended, angular-shaped bracket having a predetermined angular relationship between the axes of the opposite ends thereof; (b) means for securing one end of said angular-shaped bracket to said upper end of said side rail of said ladder; (c) resilient pad means having a substantially flat front surface adapted for contacting said wall surface of a building; (d) means pivotally securing said resilient pad means to the end of said angular-shaped bracket opposite said one end thereof; (e) said extended, angular-shaped bracket having means for limiting the pivotal movement of said resilient pad means within a predetermined range such that said front surface of said resilient pad means will fully contact said surface of said wall when said ladder is within a predetermined angular range with respect to said vertical wall of said building; and (f) said angular relationship between said opposite ends of said bracket being sufficient to maintain the top of the ladder at a predetermined distance from said wall.
Claim 2
Dependent Claim
192 words
A safeguard device, for attachment to the upper end of a side rail of a ladder, adapted to rest against a vertical wall of a building, comprising, in combination: (a) an extended, angular-shaped bracket having a predetermined angular relationship between the axes of the opposite ends thereof; (b) means for securing one end of said angular-shaped bracket to said upper end of said side rail of said ladder; (c) resilient pad means having a substantially flat front surface adapted for contacting said wall surface of a building; (d) means pivotally securing said resilient pad means to the end of said angular-shaped bracket opposite said one end thereof; (e) said extended, angular-shaped bracket having means for limiting the pivotal movement of said resilient pad means within a predetermined range such that said front surface of said resilient pad means will fully contact said surface of said wall when said ladder is within a predetermined angular range with respect to said vertical wall of said building; and (f) said angular relationship between said opposite ends of said bracket being sufficient to maintain the top of the ladder at a predetermined distance from said wall.
Claim 3
Dependent Claim
38 words
The device according to claim 1 wherein said resilient pad means comprises a backing plate pivotally secured to said extended, angular-shaped bracket and a resilient member having a flange thereon for engaging the perimeter of said backing plate.
Claim 4
Dependent Claim
26 words
The device according to claim 2 further comprising a cover member arranged to removably fit over the perimeters of said resilient member and said backing plate.
Claim 5
Dependent Claim
36 words
The device according to claim 3 wherein said cover member further comprises an annular elastic member positioned about the edge of said cover member for securing said cover member on said resilient member and backing plate.
Claim 6
Dependent Claim
43 words
A device according th claim 2 wherein said backing plate further comprises a C-shaped clamp secured to the side thereof opposite said resilient pad means, said bracket having apertures therein for receiving means for pivotally securing said resilient pad means to said bracket.
Claim 7
Dependent Claim
48 words
The device according to claim 1 wherein said means for limiting the pivotal movement of said resilient pad means within a predetermined range comprises at least one bevelled surface on said end of said bracket which prevents pivotal movement of said resilient pad means beyond said predetermined range.
Claim 8
Dependent Claim
37 words
The device according to claim 1 wherein said means for limiting the pivotal movement of said resilient pad means limits the movement thereof to between about 0° to 25° with respect to the axis of said ladder.
Claim 9
Dependent Claim
24 words
The device according to claim 1 wherein said angular relationship between the axes of said opposite ends of said bracket is an obtuse angle.
Claim 10
Dependent Claim
24 words
The device according to claim 8 wherein said angular relationship between the axes of said opposite ends of said bracket is about 37° degrees.
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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) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |