US4683983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder leveling apparatus
Assignee: Individual
•
Filing: 1986-10-06
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Granted: 1987-08-04
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Expires: 2006-10-06
Abstract
Abstract Ladder leveling apparatus includes a frame portion, a support portion, a slider portion, a retainer portion and a positioner portion. The frame portion includes an elongated U-shaped section, the U-shaped section including a main section having a width slightly larger than the width of a ladder leg. The main section includes at least one longitudinal channel. The support portion includes a foot member pivotally connected to the ladder leg. The foot member includes a connector section and a base section. The slider portion includes a guide member disposed within the channel, the guide member having a width slightly less than the width of the channel and a thickness slightly greater than the thickness of the main section. At least one opening extends through the guide member. The retainer portion includes a plate member disposed over the guide member, the plate member having a width significantly larger than that of the channel. An opening through the plate member is aligned with the guide opening. A bolt member extends through the plate and guide openings and extends beyond the main section a distance sufficient to pass through an opening through the thickness of the ladder leg. An adjustable fastener is disposed on the free end of the bolt member securing the ladder leg to the guide and plate members. The positioner portion includes a transverse pin member extending through aligned openings in the side sections.
Inventors
- 👤 Chester M. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:50
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
343 words
Ladder leveling apparatus including a frame portion, a support portion, a slider portion, a retainer portion and a positioner portion; said frame portion including an elongated U-shaped section, said U-shaped section including a main section having a width slightly larger than the width of a ladder leg, transverse side sections extending from said main section adjacent side edges thereof along substantially the entire length of said main section, said side sections having a width at least about equal to the thickness of said ladder leg, said main section including at least one longitudinal channel; said support portion including a foot member extending from one end of said frame portion, said foot member being pivotally connected to said ladder leg, said foot member including a connector section and a base section disposed on a free end of said connector section remote from said ladder leg; said slider portion including a guide member disposed within said channel, said guide member having a width slightly less than the width of said channel and a thickness slightly greater than the thickness of said main section, at least one opening through said guide member; said retainer portion including a plate member disposed over said guide member, said plate member having a width significantly larger than that of said channel, an opening through said plate member aligned with said guide opening, a bolt member extending through said plae and guide openings and extending beyond said main section a distance sufficient to pass through an opening through the thickness of said ladder leg, adjustable fastening means disposed on the free end of said bolt member securing said ladder leg to said guide and plate members; said positioner portion including a transverse pin member extending through aligned openings in said side sections; whereby said apparatus can be connected to a ladder leg with said bolt member and said fastening mens tightened thereon, said apparatus slid along said ladder leg to a desired position, and said pin member inserted through said side sections to provide a safe extension of said ladder leg.
Claim 2
Dependent Claim
343 words
Ladder leveling apparatus including a frame portion, a support portion, a slider portion, a retainer portion and a positioner portion; said frame portion including an elongated U-shaped section, said U-shaped section including a main section having a width slightly larger than the width of a ladder leg, transverse side sections extending from said main section adjacent side edges thereof along substantially the entire length of said main section, said side sections having a width at least about equal to the thickness of said ladder leg, said main section including at least one longitudinal channel; said support portion including a foot member extending from one end of said frame portion, said foot member being pivotally connected to said ladder leg, said foot member including a connector section and a base section disposed on a free end of said connector section remote from said ladder leg; said slider portion including a guide member disposed within said channel, said guide member having a width slightly less than the width of said channel and a thickness slightly greater than the thickness of said main section, at least one opening through said guide member; said retainer portion including a plate member disposed over said guide member, said plate member having a width significantly larger than that of said channel, an opening through said plate member aligned with said guide opening, a bolt member extending through said plae and guide openings and extending beyond said main section a distance sufficient to pass through an opening through the thickness of said ladder leg, adjustable fastening means disposed on the free end of said bolt member securing said ladder leg to said guide and plate members; said positioner portion including a transverse pin member extending through aligned openings in said side sections; whereby said apparatus can be connected to a ladder leg with said bolt member and said fastening mens tightened thereon, said apparatus slid along said ladder leg to a desired position, and said pin member inserted through said side sections to provide a safe extension of said ladder leg.
Claim 3
Dependent Claim
25 words
Ladder leveling apparatus according to claim 1 wherein said main section and said side sections of said frame portion are formed as a unitary structure.
Claim 4
Dependent Claim
20 words
Ladder leveling apparatus according to claim 1 wherein said frame portion has a length at least twice the width thereof.
Claim 5
Dependent Claim
22 words
Ladder leveling apparatus according to claim 1 wherein said channel extends along a major part of the length of said frame portion.
Claim 6
Dependent Claim
28 words
Ladder leveling apparatus according to claim 1 wherein said main section includes a plurality of spaced channels and said retainer portion includes a plurality of bolt members therethrough.
Claim 7
Dependent Claim
22 words
Ladders leveling apparatus according to claim 1 wherein said transverse side sections include a plurality of aligned openings along the lengths thereof.
Claim 8
Dependent Claim
18 words
Ladder leveling apparatus according to claim 1 wherein said base section of said foot member includes gripping means.
Claim 9
Dependent Claim
20 words
Ladder leveling apparatus according to claim 1 wherein said guide member has a length more than twice the width thereof.
Claim 10
Dependent Claim
20 words
Ladder leveling apparatus according to claim 8 wherein said guide member includes more than one opening along the length thereof.
Claim 11
Dependent Claim
28 words
Ladder leveling apparatus according to claim 5 wherein said plate member has a width spanning more than one channel with at least one opening aligned with each channel.
Claim 12
Dependent Claim
25 words
Ladder leveling apparatus according to claim 10 wherein said plate member has a generally quadrangular configuration with more than one opening aligned with each channel.
Claim 13
Dependent Claim
23 words
Ladder leveling apparatus according to claim 1 wherein said pin member includes retaining means holding the position thereof between said side frame sections.
Claim 14
Dependent Claim
32 words
Ladder leveling apparatus according to claim 1 wherein said ladder leg includes a horizontal passage from one side edge thereof to the other carrying said pin member between said side frame sections.
Claim 15
Dependent Claim
23 words
Ladder leveling apparatus according to claim 1 including elongated flexible means connecting a head end of said pin member with said frame portion.
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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) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |