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Document Title |
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6857503 |
Convertible ladder
A ladder having a first ladder section, a second ladder section, an adjustable hinge mechanism, an engagement indicator and a static hinge mechanism. The adjustable hinge mechanism is mounted with...
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6657547 |
Sensing and warning system for ladder load
Disclosed is a sensing and warning system for ladder load composed of sending means, a recording and calculation device, and an alarm for detecting, recording and evaluating the ladder load, and...
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6543579 |
Ladder with a floor board
A length-adjustable ladder functioning as a telescopic lean-to ladder, a free-standing stepladder, and as a platform is described. The ladder includes stringers, ladder rungs fastened between the...
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5626205 |
Portable work platform
A portable work platform for use in the construction trade which includes a pair of side rails interconnected by a plurality of crossbars and supported by pivotal legs connected to the rails....
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5358069 |
Stepboard for ladders
A collapsible ladder having vertical and horizontal ladder parts has a stepboard detachably mounted on the horizontal ladder part. The stepboard has a width which is less than or equal to the...
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5353892 |
Ladder joint for a folding collapsible ladder
A ladder joint includes a pivot, a first base plate mounted on the pivot and connected to a first side rail section of one side rail of a ladder, a second base plate mounted on the pivot and...
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5332062 |
Simplified scaffold ladder
A combination scaffold ladder device having a scaffold portion which is formed by a prop positioned above a pair of ladder side members, and is connected to the sides by connecting means which...
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5279387 |
Articulated ladder assembly
An assembly including several ladder sections positionable in several different ladder use positions, wherein intermeshable teeth elements can be cam locked selectively into such positions, and...
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4951780 |
Combination ladder and height adjustable scaffold
A combination folding ladder and height adjustable scaffold, comprises (a) a first assembly including a first leg and a second leg, each formed by an outer and inner telescoping member, and outer...
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4947959 |
Folding ladder
A folding ladder comprising of four straight sections each consisting of two uprights and four rungs equally spaced. The sections are connected with insulating hinged joints which can be tightened...
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4842098 |
Adjustable folding ladder
The invention is an adjustable folding ladder that can be easily altered in its length and shape to adjust to the proper working height and angles for the user. With the fiber glass nylon hinges,...
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4699246 |
Multipurpose ladder
The present invention discloses a multipurpose ladder, and comprises four section-ladders; four pivot joint device provided between section-ladders, respectively, for connection but at least one...
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4690248 |
Portable hoist
A collapsible frame of a general ladder shape having elongated side rails connected by transverse support members. The frame defines an inverted U-shaped frame when in its unfolded operative...
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4519476 |
Detachable workbench top
This invention relates to a detachable top to be used with foldup ladders of the type described in co-pending applications Ser. Nos. 06/341,830; 06/492,487; and 06/537,276. Also, this top can be...
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4493392 |
Convertible fold-up ladder
A portable folding ladder comprising a plurality of U-shaped modules having a rung and two vertical portions, the modules movable connected to each other, and when opened becoming progressively...
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4412599 |
Ladder attachment
A ladder attachment for securement to a ladder leg which can function as a ladder standoff, ladder leg extension or roof ridge hook. The ladder standoff arrangement permits the ladder to be...
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4365799 |
Folding slide and platform structure
Structures including a platform and a slide located adjacent to the platform which are primarily useful for play purposes can be constructed so as to fold into an essentially small, flat...
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4284171 |
Convertible ladder
A convertible ladder is provided which can be set up as an extension ladder, a step ladder or a trestle. A pair of leg assemblies each have a pair of sides connected by a plurality of rungs. Each...
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4060150 |
Ladder kit
A ladder kit comprises a plurality of parts from which a ladder may be constructed. The parts of the kit may be selected and assembled in a number of ways, resulting in various types of ladder...
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3739876 |
COMBINATION STEP LADDER AND WORK SUPPORT
A dual purpose foldable stepladder comprising a step-equipped front frame hingedly connected to a back prop frame having two pairs of foldable auxiliary legs on the back prop frame to support the...
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3724592 |
ADJUSTABLE LADDER AND SCAFFOLD
A ladder having one or more of its legs individually extensible so as to enable it to stand or be supported on an irregular surface. The ladder can be converted into a scaffold whose height may be...
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3613831 |
LADDER SCAFFOLD
A scaffold is provided which employs as its platform portion a conventional straight-type ladder. The invention includes a pair of end leg assemblies each having a channel-shaped upper head portion...
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3566990 |
PORTABLE SCAFFOLD
A portable scaffold having a pair of caster-mounted ladder ends joined by a vertically adjustable platform. The casters have brake shoes which can be applied remotely from the platform to stop...
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3554318 |
FOLDING LADDER
A folding ladder comprises a plurality of ladder sections which are connected together in end-for-end relationship by coupling means and in which at least two of the coupling means are hinge...
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3474881 |
FOLDING LADDER
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3266593 |
Ladder bracket
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3265155 |
Extensible ladder and support
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3250344 |
Stepladder-scaffold combination
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3143185 |
Multi-purpose folding ladder
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3073414 |
Collapsible ladder
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3071204 |
Adjustable scaffolding
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3062318 |
Folding scaffold ladder
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3014552 |
Ladder construction
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3007540 |
Personnel work structure convertible to extension ladder and scaffolding means
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3006432 |
Sectional ladder
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2901054 |
Combination scaffold-ladders
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2877058 |
Folding platforms
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2804250 |
Sectional ladders
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2418862 |
Convertible ladder
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2371092 |
Scaffold-ladder
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2316038 |
Combination support
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2312148 |
Combination stepladder
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2233333 |
Combined ladder and scaffold
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2220155 |
Folding stairway
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2162040 |
Ladder construction
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2118585 |
Scaffold board and ladder
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2083320 |
Roof laying scaffold
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2024039 |
Universal folding ladder
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2012592 |
Ladder
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1953390 |
Ladder
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