US4061203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder attachment
Assignee: SPENCER TOOL AND Mfg CO Inc
•
Filing: 1977-02-28
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Granted: 1977-12-06
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Expires: 1997-02-28
Abstract
Abstract A device for attachment to a ladder which enables the upper end of a ladder to be spaced from the wall of the building, span windows and/or rest on a slant roof and thus span the gutters. The device also acts as a stabilizer bar or tube to prevent slippage of the ladder laterally, gives greater stabilization to the ladder, and almost automatically positions the ladder at the correct angle of inclination away from the lower wall of a building, and generally promotes a greater margin of safety. Also, the device is readily separable after use for small compact storage.
Inventors
- 👤 Frederick J. Spencer
- 👤 Edward Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
A knockdown antisway or stabilizer device for the upper end of an extension ladder having a pair of side rails and rungs comprising, in combination: a. a pair of horizontal elongated tubular members removably secured together end to end, the free end of said members being bent at right angles to said horizontal portion of said members and both bent in the same direction to form legs; b. a pair of U-shaped angle brackets each having a pair of spaced side walls and a connector top wall, and outwardly extending flanges on the free ends of said side walls, each of said flanges having an arcuate slot formed therein and arranged cater-cornered from each other, each side wall having opposed apertures therein; c. means for removably securing said brackets one to each of said members in spaced relation; and d. a pair of U-shaped bolts having legs for anchoring said brackets and members to the rails of said ladder and about the uppermost rung thereof.
Claim 2
Dependent Claim
165 words
A knockdown antisway or stabilizer device for the upper end of an extension ladder having a pair of side rails and rungs comprising, in combination: a. a pair of horizontal elongated tubular members removably secured together end to end, the free end of said members being bent at right angles to said horizontal portion of said members and both bent in the same direction to form legs; b. a pair of U-shaped angle brackets each having a pair of spaced side walls and a connector top wall, and outwardly extending flanges on the free ends of said side walls, each of said flanges having an arcuate slot formed therein and arranged cater-cornered from each other, each side wall having opposed apertures therein; c. means for removably securing said brackets one to each of said members in spaced relation; and d. a pair of U-shaped bolts having legs for anchoring said brackets and members to the rails of said ladder and about the uppermost rung thereof.
Claim 3
Dependent Claim
56 words
The device according to claim 1 wherein each U-bolt extends around a rail and the upper rung of the ladder with a portion of the legs and extending through said arcuate slots in said flanges, and plates having spaced apertures through which said legs extend and means for securing said plate against each of said members.
Claim 4
Dependent Claim
71 words
The device according to claim 2 wherein each of said members is provided with a series of spaced apertures extending at about a 15° angle from a vertical centerline lying normal to the axis of said members, and said means for removably securing said brackets are bolts which extend through said apertures in the side walls of said brackets and through the aperture in said members and are anchored with nuts.
References Cited (Backward Citations)
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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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |