Patent US3662856A successfully refreshed from Google Patents.
US3662856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy ladder safety protector
Assignee: Individual
•
Filing: 1970-04-30
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Granted: 1972-05-16
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Expires: 1990-04-30
Abstract
Abstract A ladder protector for a ladder having side rails is disclosed wherein electrical and bearing functions are provided for each end of the side rails by a flexible foam body member having a plurality of resilient closed gas filled cells. The protector includes elastic wall means for easy assembly and removal of the protector from each end of the ladder rails.
Inventors
- 👤 Andre K D Amico
- 👤 Thomas J Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:47
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A ladder protector for a ladder having side rails, said protector comprising: a. a body member of resilient elastic foam material having a plurality of closed gas filled cells, b. said body member being an hexahedron having flat rectangular contacting surfaces, and c. said body member having elastic wall means disposed therein forming a receptacle for yieldingly mounting said body member over an end of one of said side rails so that said end floats on said closed gas filled cells when said end rests against a supporting surface.
Claim 2
Dependent Claim
89 words
A ladder protector for a ladder having side rails, said protector comprising: a. a body member of resilient elastic foam material having a plurality of closed gas filled cells, b. said body member being an hexahedron having flat rectangular contacting surfaces, and c. said body member having elastic wall means disposed therein forming a receptacle for yieldingly mounting said body member over an end of one of said side rails so that said end floats on said closed gas filled cells when said end rests against a supporting surface.
Claim 3
Dependent Claim
13 words
The invention defined in claim 1 wherein said foam material is flexible polyurethane.
Claim 4
Dependent Claim
13 words
The invention defined in claim 1 wherein said foam material is flexible polyester.
Claim 5
Dependent Claim
22 words
The invention defined in claim 1 wherein said body member is symetrical about an axis through said wall means and said receptacle.
Claim 6
Dependent Claim
37 words
The invention defined in claim 1 wherein at least half of said plurality of cells are closed gas filled cells for providing a self forming contour bearing support for said end of said one of said rails.
Claim 7
Dependent Claim
14 words
The invention defined in claim 1 wherein said body member is an electrical insulator.
Claim 8
Dependent Claim
42 words
The invention defined in claim 1 wherein said receptacle formed by said elastic wall means has a smaller cross-sectional area than said end of one of said rails for yieldingly mounting said protector on said end of one of said side rails.
References Cited (Backward Citations)
US2138171A
Cited
US3046004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |