Patent US3693756A successfully refreshed from Google Patents.
US3693756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder stabilizer
Assignee: KINKEAD IND Inc
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Filing: 1970-12-14
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Granted: 1972-09-26
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Expires: 1990-12-14
Abstract
Abstract A stabilizer for supporting a ladder formed of a U-shaped frame of extruded tubing of diamond shaped cross section providing a flat clamping surface cocked at an angle to the plane of the frame and which is clamped to the upright members of a ladder so as to be automatically oriented in horizontal position to press at right angles against the wall of the building when the ladder is in its normal working position. Pivoted feet are provided at the ends of the frame held resiliently in a centered, wall engaging, position but capable of rocking movement for self alinement with angled wall surfaces. Each foot is fitted with a rubber pad surfaced to prevent slipping in any direction. The diamond cross section provides an adjacent clamping surface which is parallel to the plane of the frame for permitting the frame to be clamped parallel to the upright members of the ladder to provide lateral outboard support. The frame is fitted with a pair of parallel rods for slidable reception of a rectangular tray.
Inventors
- 👤 Patrick J Walker
- 👤 Harold W Stillman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:03
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/48; E06C7/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
215 words
A ladder stabilizer intended for clamping to the upper or lower portions of the upright members of a ladder comprising, in combination, a tubular frame formed into U-shape to define two projecting legs and an integral cross member, the latter substantially exceeding the width of the ladder, feet at the ends of the respective leGs each having a non-skid surface for presentation to the wall of a building, the tubular frame being shaped in cross section to define a flat clamping surface extending along the length thereof for face to face engagement with the upper portion of said upright members, which clamping surface is cocked at an angle to the plane of the frame so that when the ladder is in its normal inclined working position the frame extends horizontally therefrom for engagement with the wall or roof of the building, said tubular frame having an auxiliary flat clamping surface extending along the length of at least the cross member and lying parallel to the plane of the frame for clamping in face to face engagement with the lower portion of said upright members to provide lateral outboard support when the ladder is in its normally inclined working position, and means for clamping either of said clamping surfaces to the upright members of the ladder.
Claim 2
Dependent Claim
215 words
A ladder stabilizer intended for clamping to the upper or lower portions of the upright members of a ladder comprising, in combination, a tubular frame formed into U-shape to define two projecting legs and an integral cross member, the latter substantially exceeding the width of the ladder, feet at the ends of the respective leGs each having a non-skid surface for presentation to the wall of a building, the tubular frame being shaped in cross section to define a flat clamping surface extending along the length thereof for face to face engagement with the upper portion of said upright members, which clamping surface is cocked at an angle to the plane of the frame so that when the ladder is in its normal inclined working position the frame extends horizontally therefrom for engagement with the wall or roof of the building, said tubular frame having an auxiliary flat clamping surface extending along the length of at least the cross member and lying parallel to the plane of the frame for clamping in face to face engagement with the lower portion of said upright members to provide lateral outboard support when the ladder is in its normally inclined working position, and means for clamping either of said clamping surfaces to the upright members of the ladder.
Claim 3
Dependent Claim
74 words
A ladder stabilizer as claimed in claim 7 in which the feet are pivoted to the ends of the legs for limited rocking movement about a horizontal axis and in which each foot has an associated spring for maintaining the same resiliently centered with respect to the associated leg and positioned to engage a supporting wall surface at right angles to the plane of the frame while permitting self-accommodation to an angled wall surface.
Claim 4
Dependent Claim
42 words
The ladder stabilizer as claimed in claim 7 in which the feet at the ends of the respective legs are fitted with rubber pads having a circularly ridged surface for inhibiting skidding movement in any direction along the wall of the building.
Claim 5
Dependent Claim
212 words
A ladder stabilizer intended for clamping to the upright members of a ladder comprising, in combination, a frame of tubular cross section formed into U-shape to define two projecting legs and an integral cross member which substantially exceeds the width of the ladder, feet at the ends of the respective legs each having a surface for presentation to the wall of a building, means for clamping the cross member of the frame to the vertical members of the ladder, the cross member having a flat clamping surface extending along the length thereof for face to face engagement with the upright members and which is cocked at an angle to the plane of the frame so that when the ladder is in its normally inclined working position the frame extends horizontally therefrom for engagement with the wall of the building, the cross member further having an adjacent auxiliary clamping surface which is parallel to the plane of the frame so that when the frame is clamped to the lower end of the ladder with the auxiliary clamping surface in engagement with the upright members and with the feet in engagement with the ground, outboard lateral support is provided, in the plane of the ladder, against sidewise movement of the ladder in either direction.
Claim 6
Dependent Claim
212 words
A ladder stabilizer intended for clamping to the upright members of a ladder comprising, in combination, a frame of tubular cross section formed into U-shape to define two projecting legs and an integral cross member which substantially exceeds the width of the ladder, feet at the ends of the respective legs each having a surface for presentation to the wall of a building, means for clamping the cross member of the frame to the vertical members of the ladder, the cross member having a flat clamping surface extending along the length thereof for face to face engagement with the upright members and which is cocked at an angle to the plane of the frame so that when the ladder is in its normally inclined working position the frame extends horizontally therefrom for engagement with the wall of the building, the cross member further having an adjacent auxiliary clamping surface which is parallel to the plane of the frame so that when the frame is clamped to the lower end of the ladder with the auxiliary clamping surface in engagement with the upright members and with the feet in engagement with the ground, outboard lateral support is provided, in the plane of the ladder, against sidewise movement of the ladder in either direction.
Claim 7
Dependent Claim
197 words
A ladder stabilizer intended for clamping to the upright members of a ladder comprising, in combination, a frame of tubular cross section formed into U-shape to define two projecting legs and an integral cross member which substantially exceeds the width of the ladder, feet at the ends of the respective legs each having a surface for presentation to the wall of a building, means for clamping the cross member of the frame to the vertical members of the ladder, the cross member having a flat clamping surface extending along the length thereof for face to face engagement with the upright members and which is cocked at an angle to the plane of the frame so that when the ladder is in its normally inclined working position the frame extends horizontally therefrom for engagement with the wall of the building, the frame further including a pair of spaced reinforcing rods extending parallel to one another from one of the legs to the other and in which a shallow rectangular tray is provided having means on its lateral edges for registering with the rods for sliding of the tray horizontally from one end of the frame to the other.
Claim 8
Dependent Claim
197 words
A ladder stabilizer intended for clamping to the upright members of a ladder comprising, in combination, a frame of tubular cross section formed into U-shape to define two projecting legs and an integral cross member which substantially exceeds the width of the ladder, feet at the ends of the respective legs each having a surface for presentation to the wall of a building, means for clamping the cross member of the frame to the vertical members of the ladder, the cross member having a flat clamping surface extending along the length thereof for face to face engagement with the upright members and which is cocked at an angle to the plane of the frame so that when the ladder is in its normally inclined working position the frame extends horizontally therefrom for engagement with the wall of the building, the frame further including a pair of spaced reinforcing rods extending parallel to one another from one of the legs to the other and in which a shallow rectangular tray is provided having means on its lateral edges for registering with the rods for sliding of the tray horizontally from one end of the frame to the other.
Claim 9
Dependent Claim
98 words
The combination as Claimed in claim 5 in which the tray is provided with a pair of bails secured to the tray at the opposite ends thereof and having a length such that they meet at the middle of the tray in arching configuration for single handed gripping to hold a can of paint in the tray for transport, the bails having a width which is less than the spacing between the rods so that the bails may be swung outwardly and downwardly to an out of the way position when the tray is mounded on the rods.
Claim 10
Dependent Claim
192 words
A ladder stabilizer intended for clamping to the upright members of a ladder comprising, in combination, a tubular frame formed into U-shape to define two projecting legs and an integral cross member, the latter substantially exceeding the width of the ladder, feet at the ends of the respective legs each having a surface for presentation to the wall of a building, means for clamping the cross member of the frame to the upright members of the ladder, a shallow tray, means for slidably mounting the tray upon the frame, said mounting means extending from one leg to the other whereby said tray may be moved from one leg of the frame to the other, the cross member having a flat clamping surface extending along the length thereof for engagement with the upright members of the ladder and which is cocked at an angle to the plane of the frame so that when the ladder is in its normal working position inclined from the vertical the frame extends horizontally therefrom for engagement with the wall of the building, thereby holding the tray horizontal for support of open cans of paint or the like.
Claim 11
Dependent Claim
192 words
A ladder stabilizer intended for clamping to the upright members of a ladder comprising, in combination, a tubular frame formed into U-shape to define two projecting legs and an integral cross member, the latter substantially exceeding the width of the ladder, feet at the ends of the respective legs each having a surface for presentation to the wall of a building, means for clamping the cross member of the frame to the upright members of the ladder, a shallow tray, means for slidably mounting the tray upon the frame, said mounting means extending from one leg to the other whereby said tray may be moved from one leg of the frame to the other, the cross member having a flat clamping surface extending along the length thereof for engagement with the upright members of the ladder and which is cocked at an angle to the plane of the frame so that when the ladder is in its normal working position inclined from the vertical the frame extends horizontally therefrom for engagement with the wall of the building, thereby holding the tray horizontal for support of open cans of paint or the like.
References Cited (Backward Citations)
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US1553279A
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US2666608A
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US2903086A
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |