Patent US3568798A successfully refreshed from Google Patents.
US3568798A
Expired / Lapsed
US
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Ladder stabilizer
Assignee: Individual
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Filing: 1969-07-28
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Granted: 1971-03-09
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Expires: 1989-07-28
Abstract
Abstract A ladder stabilizing apparatus which consists of foldable, extensible legs mountable on the siderails of a ladder by means of a hinging structure which dictates and limits the angular displacement of the legs.
Inventors
- 👤 Ted W Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:31
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/423; E06C1/00; E06C1/02; E06C1/14; E06C1/16; E06C1/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A stabilizing apparatus for use with a ladder comprising: a pair of hinge bearing means attachable to the siderails of a ladder, adapted to hinge a pair of stabilizing legs at their upper ends enabling said legs to be unfolded from a position adjacent and substantially parallel the ladder siderails to a position angling outwardly from the siderails, and forming stops to limit the hinging angle of said legs; a pair of stabilizing legs hinged at their upper ends in said hinge bearing means; and restraining means mounted on the ladder and adapted to hold said legs in a folded position adjacent and substantially parallel to the ladder siderails.
Claim 2
Dependent Claim
109 words
A stabilizing apparatus for use with a ladder comprising: a pair of hinge bearing means attachable to the siderails of a ladder, adapted to hinge a pair of stabilizing legs at their upper ends enabling said legs to be unfolded from a position adjacent and substantially parallel the ladder siderails to a position angling outwardly from the siderails, and forming stops to limit the hinging angle of said legs; a pair of stabilizing legs hinged at their upper ends in said hinge bearing means; and restraining means mounted on the ladder and adapted to hold said legs in a folded position adjacent and substantially parallel to the ladder siderails.
Claim 3
Dependent Claim
30 words
The stabilizer apparatus as set forth in claim 1 in which; at least one mounting plate is provided to attach to the ladder siderail and carry said hinge bearing means.
Claim 4
Dependent Claim
28 words
The stabilizing apparatus as set forth in claim 1 in which; said stabilizer legs are adapted to be hinged at their upper ends and are adjustably, longitudinally extensible.
Claim 5
Dependent Claim
47 words
The stabilizing apparatus as set forth in claim 1 in which; said restraining means consists of a pair of horseshoe-shaped spring clips mounted on the outside of the ladder siderails and adapted to frictionally engage said legs as the latter are folded parallel to the ladder siderails.
Claim 6
Dependent Claim
68 words
The stabilizing apparatus as set forth in claim 1 in which; said hinge bearing means consists of a U-shaped bracket so mounted that the sides form a channel which is substantially vertical and parallel to the ladder siderails and the curved end is spaced outwardly away from the siderails, and a hinge pin fixed between said sides perpendicular thereto and adapted to hinge said legs within said channel.
Claim 7
Dependent Claim
86 words
The stabilizing apparatus as set forth in claim 5 in which: said U-shaped bracket sides are of unequal lengths with the shorter side being mounted nearest the rear edge of the ladder siderail thereby causing the longitudinal axis of the hinge pin to intersect the side of the ladder siderail at an acute angle; and said hinge pin is so positioned in said bracket to cause said curved bracket end to form a stop at the lower edge thereof limiting the hinging angle of said legs.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |