Patent US4974699A successfully refreshed from Google Patents.
US4974699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder safety device
Assignee: Individual
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Filing: 1989-05-08
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Granted: 1990-12-04
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Expires: 2009-05-08
Abstract
Abstract A safety device for stabilizing the upper end of a ladder against the exterior wall of a building or other resting surface comprising a tubular body of a length greater than the typical ladder width and having coaxial and coextensive inner and outer contiguous tubular sections. The inner tubular section is a normally rigid temporarily deformable member and the other tubular section is a resilient slip-resistant sheath. The tubular body is provided with spaced-apart longitudinally aligned openings permitting insertion-registration of ends of the ladder stiles, and straps are provided for removably securing the device to the ladder.
Inventors
- 👤 Clair W. Boring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:20
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
187 words
A safety device for mounting on the end of a ladder, of the type having a pair of parallel stiles and equidistantly-spaced rungs, comprising: an elongated tubular member having a uniform diameter and having a pair of spaced sidewall openings enabling lateral insertion therein of the ladder upper stile ends; the tubular member comprising an inner tubular section and an outer deformable slip-resistant sleeve; the openings each being of sufficient size to accept the stile ends therethrough whereby the stile ends contact an inner surface of the tubular section; the tubular member having a normally fixed body shape that is susceptible to temporary lateral body deformation in response to the ladder being placed in position for use with the safety device in surface contact with a building wall or other resting surface; and the tubular member temporarily forming, where the tubular member is in surface contact with the resting surface, a flattened area of registration the size of which is a function of the force applied through the upper stile ends to the inside surface of the tubular member in response to a person mounting the ladder.
Claim 2
Dependent Claim
187 words
A safety device for mounting on the end of a ladder, of the type having a pair of parallel stiles and equidistantly-spaced rungs, comprising: an elongated tubular member having a uniform diameter and having a pair of spaced sidewall openings enabling lateral insertion therein of the ladder upper stile ends; the tubular member comprising an inner tubular section and an outer deformable slip-resistant sleeve; the openings each being of sufficient size to accept the stile ends therethrough whereby the stile ends contact an inner surface of the tubular section; the tubular member having a normally fixed body shape that is susceptible to temporary lateral body deformation in response to the ladder being placed in position for use with the safety device in surface contact with a building wall or other resting surface; and the tubular member temporarily forming, where the tubular member is in surface contact with the resting surface, a flattened area of registration the size of which is a function of the force applied through the upper stile ends to the inside surface of the tubular member in response to a person mounting the ladder.
Claim 3
Dependent Claim
21 words
The safety device of claim 1 further including securement means for removably securing the tubular member in position on the ladder.
Claim 4
Dependent Claim
17 words
The safety device of claim 2 wherein the securement means is fully contained within the tubular member.
Claim 5
Dependent Claim
43 words
The safety device of claim 2 wherein the securement means comprises spaced-apart straps extending from the tubular member, the straps having means for removable connection to the first adjacent ladder rung when the safety device is mounted on the end of a ladder.
Claim 6
Dependent Claim
29 words
The safety device of claim 2 wherein the securement means includes at least one elongated rigid rod mounted within the tubular member and extending generally between the stile ends.
Claim 7
Dependent Claim
15 words
The safety device of claim 5 wherein the rod is attached directly to the stiles.
Claim 8
Dependent Claim
59 words
The safety device of claim 2 wherein the securement means includes: first and second elongated rods oriented parallel to each other and extending transversely between the openings, the first rod being contained within the tubular member, the second rod being disposed outwardly adjacent the tubular member, and fastening means connecting the adjacent ends of the first and second rods.
Claim 9
Dependent Claim
29 words
The safety device of claim 7 further including releasable strap means for extension from the second rod to the rung of the ladder most closely adjacent the tubular member.
Claim 10
Dependent Claim
24 words
The safety device of claim 7 wherein the fastening means comprises two fasteners, each located in one of the openings in the tubular member.
Claim 11
Dependent Claim
51 words
The safety device of claim 1 wherein the sleeve is fully coextensive with the inner tubular section, the openings are in the inner tubular section, and the sleeve includes integral flap portions overlying the openings and adapted to fold inwardly as a function of insertion of ladder stiles in the openings.
References Cited (Backward Citations)
CH82771A
Cited
FR1116712A
Cited
US2904128A
Cited
US4491192A
Cited
CA1176611A
Cited
US4726446A
Cited
US4754843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |