US3792750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for ladders
Assignee: Individual
•
Filing: 1973-02-20
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Granted: 1974-02-19
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Expires: 1993-02-20
Abstract
Abstract A safety device for use with a ladder having a pair of laterally spaced rails and a plurality of rungs extending between and spaced along the rails with opposed bores spaced along said rails in the rungs or otherwise wherein the safety device includes a pair of side members each positioned adjacent a respective one of the rails and having opposite end portions thereof each extending into a respective one of the bores and receiving a respective end portion of a respective one of a pair of connector members each adapted to be positioned in a selected one of the bores. A tie member extends between and has opposite end portions thereof connected to an intermediate portion of each of the side members. The tie member, side members, and the ladder define a cage structure for protecting a person on the ladder.
Inventors
- 👤 B Madison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:10
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/18; E06C7/185; E06C7/16; E06C7/48
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
In combination with a ladder having a pair of laterally spaced rails and a plurality of rungs extending between and spaced along said rails with opposed bores in said rails, a safety device comprising: a. a pair of connector members each adapted to be positioned in a respective and selected one of a plurality of spaced opposed bores of a ladder; b. a pair of side members each positioned adjacent a respective one of a pair of rails of the ladder and each having opposite end portions each extending into a respective one of the bores and receiving a respective end portion of a respective one of said connector members, said side members each having an intermediate portion spaced outwardly from the rails of the ladder; and c. a tie member extending betwEen and connected to the intermediate portion of said side members.
Claim 2
Dependent Claim
143 words
In combination with a ladder having a pair of laterally spaced rails and a plurality of rungs extending between and spaced along said rails with opposed bores in said rails, a safety device comprising: a. a pair of connector members each adapted to be positioned in a respective and selected one of a plurality of spaced opposed bores of a ladder; b. a pair of side members each positioned adjacent a respective one of a pair of rails of the ladder and each having opposite end portions each extending into a respective one of the bores and receiving a respective end portion of a respective one of said connector members, said side members each having an intermediate portion spaced outwardly from the rails of the ladder; and c. a tie member extending betwEen and connected to the intermediate portion of said side members.
Claim 3
Dependent Claim
53 words
In combination with a ladder, a safety device as set forth in claim 1 wherein: a the opposite end portions of each of said side members extend generally normal to the intermediate portion thereof; and b the intermediate portion of said side members includes outwardly converging portions joined in a return bend portion.
Claim 4
Dependent Claim
67 words
In combination with a ladder, a safety device as set forth in claim 2 wherein: a each of the outwardly converging portions of one of said side members is coplanar with a respective one of the outwardly converging portions of the other of said side members; and b one of the outwardly converging portions of said side members is substantially horizontal when the ladder is in use.
Claim 5
Dependent Claim
89 words
In combination with a ladder, a safety device as set forth in claim 1 wherein: a said connector members each have opposite end portions of a size to be frictionally received in a respective end portion of said side members; b said side members are each tubular members; c the opposite end portions of each of said side members extend generally normal to the intermediate portion of said side members; and d the intermediate portion of said side members includes outwardly converging portions joined in a return bend portion.
Claim 6
Dependent Claim
63 words
In combination with a ladder, a safety device as set forth in claim 4 wherein: a. each of the outwardly converging portions of one of said side members is coplanar with a respective one of the outwardly converging portions of the other of said side members; and b the return bend portion of each of said side members has a protective coating thereon.
Claim 7
Dependent Claim
134 words
A safety device for use with a ladder having a pair of laterally spaced rails and a plurality of rungs extending between and spaced along said rails and opposed bores in said rails, said safety device comprising: a a pair of side members each positioned adjacent a respective one of a pair of rails of a ladder and each having opposite end portions each extending into a respective one of a plurality of opposed bores extending between and spaced along the rails; b means extending between and connected to said side members at a position spaced from the rails of the ladder for maintaining a selected spacing between said side members; and c. means engaging the opposite end portions of said side members for maintaining the opposite end portions in a selected spacing therebetween.
Claim 8
Dependent Claim
134 words
A safety device for use with a ladder having a pair of laterally spaced rails and a plurality of rungs extending between and spaced along said rails and opposed bores in said rails, said safety device comprising: a a pair of side members each positioned adjacent a respective one of a pair of rails of a ladder and each having opposite end portions each extending into a respective one of a plurality of opposed bores extending between and spaced along the rails; b means extending between and connected to said side members at a position spaced from the rails of the ladder for maintaining a selected spacing between said side members; and c. means engaging the opposite end portions of said side members for maintaining the opposite end portions in a selected spacing therebetween.
Claim 9
Dependent Claim
51 words
A safety device as set forth in claim 6 wherein: a said side members each have an intermediate portion spaced outwardly from the respective rails of the ladder; and b the opposite end portions of each of said side members extend generally normal to the intermediate portion of said side members.
Claim 10
Dependent Claim
44 words
A safety device as set forth in claim 7 wherein: a the intermediate portion of said side members includes outwardly converging portions joined in a return bend; and b the return bend portion of each of said side members has a protective coating thereon.
Claim 11
Dependent Claim
83 words
A safety device as set forth in claim 6 wherein: a the opposite end portions of each of said side members are tubular; and b said means for maintaining the opposite end portions in a selected spacing comprises a pair of connector members each adapted to be positioned in a respective one of a plurality of spaced tubular rungs of a ladder and having opposite end portions of a size to be frictionally received in a respective end portion of said side members.
Claim 12
Dependent Claim
51 words
A safety device as set forth in claim 9 wherein: a the opposite end portions of each of said side members extend generally normal to the intermediate portion of said side members; and b the intermediate portion of said side members includes outwardly converging portions joined in a return bend portion.
Claim 13
Dependent Claim
58 words
A safety device as set forth in claim 10 wherein: a each of the outwardly converging portions of one of said side members is coplanar wIth a respective one of the outwardly converging portions of the other of said side members; and b the return bend portion of each of said side members has a protective coating thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |