US4311210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-purpose ladder attachment
Assignee: Individual
•
Filing: 1980-10-09
•
Granted: 1982-01-19
•
Expires: 2000-10-09
Abstract
Abstract A multi-purpose attachment for ladders enhances the safety and convenience of a ladder. A basic attachment unit is adjustable along ladder side rails and can be locked in any selected position. The basic unit contains fittings which allow the ready attachment and locking of gutter, roof and ladder side rail attachment components all held securely by set screws.
Inventors
- 👤 Jacob J. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:34
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48; E06C7/486; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
A multi-purpose ladder attachment comprising a basic mounting unit including a cross member spanning a ladder transversely during use and having means for clamping said unit to the opposite side rails of a ladder, said unit having a pair of upright axis sleeves near its opposite sides and an upright axis sleeve near its center, said sleeves having adjustable locking elements thereon, a pair of arm assemblies engageable in said pair of upright axis sleeves and being rotatable therein and lockable by said locking elements, ladder side rail extension members engageable adjustably in said side upright axis sleeves and being lockable therein by said locking elements, and an attachment for engaging a roof or pole including a depending member engageable and lockable in said upright sleeve near the center of said unit.
Claim 2
Dependent Claim
132 words
A multi-purpose ladder attachment comprising a basic mounting unit including a cross member spanning a ladder transversely during use and having means for clamping said unit to the opposite side rails of a ladder, said unit having a pair of upright axis sleeves near its opposite sides and an upright axis sleeve near its center, said sleeves having adjustable locking elements thereon, a pair of arm assemblies engageable in said pair of upright axis sleeves and being rotatable therein and lockable by said locking elements, ladder side rail extension members engageable adjustably in said side upright axis sleeves and being lockable therein by said locking elements, and an attachment for engaging a roof or pole including a depending member engageable and lockable in said upright sleeve near the center of said unit.
Claim 3
Dependent Claim
68 words
A multi-purpose ladder attachment as defined in claim 1, and said means for clamping said unit to the side rails of a ladder comprising a pair of locator plates on opposite sides of said unit in spaced parallel relationship to said cross member, and a pair of ladder side rail engaging set screws on the opposite sides of said unit between the locator plates and said cross member.
Claim 4
Dependent Claim
20 words
A multi-purpose ladder attachment as defined in claim 1, and said adjustable locking elements on said sleeves comprising set screws.
Claim 5
Dependent Claim
30 words
A multi-purpose ladder attachment as defined in claim 1, and adjustable clamping means on said arm assemblies operable to secure the arm assemblies to a rain gutter or the like.
Claim 6
Dependent Claim
49 words
A multi-purpose ladder attachment as defined in claim 4, and said clamping means comprising plates on the arm assemblies near their forward ends, set screws carried by said plates, and extension elements on the arm assemblies at their forward ends in spaced opposed relationship to the last-named set screws.
Claim 7
Dependent Claim
54 words
A multi-purpose ladder attachment as defined in claim 1, and said attachment for engaging a roof or pole further including a pair of divergent support members disposed in a plane substantially at right angles to said depending member, and a three-way elbow coupled with said divergent and depending members to form a rigid unit.
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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) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |