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4515242 |
Movable hand railing and tray for ladders
A sleeve fits securely over a ladder rail with attached hooks over at least two rungs of the ladder. Attached to the side of the sleeve are a rigid hand rail and pivotable utility tray. Clips on...
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4509617 |
Stair having alternate half treads
A stair having a central stringer and two parallel side stringers. A plurality of vertically-spaced half treads is disposed on each side of the central stringer and extends between the central...
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4494626 |
Combination stepladder and hand truck apparatus
This invention is a combination stepladder and hand truck apparatus having a ladder support frame assembly pivotally connected to an upper portion of a hand truck support frame assembly and further...
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4450937 |
Theft prevention step ladder
A step ladder for detachably mounting in a locked arrangement along the length of the permanent ladder of a recreational vehicle for preventing thieves from climbing to the top of the recreational...
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4425984 |
Removable handrail for ladders
Parallel tubular arms removably slide into the openings through the openings in the side rails and the hollow rungs of aluminum ladders. A swivel on at least one arm protruding through both ladder...
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4421206 |
Ladder
In a stepladder, with two legs which are connected with each other swingably around an axis in the region of an upper end of the legs, at least one of the legs has transverse support members which...
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4418792 |
Pool ladder
A pool ladder for use by individuals confined to a wheelchair having a top step which is at a height substantially equal to the height of a wheelchair seat, and a second step which is at a height...
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4378862 |
Portable spiral staircase
A self-supporting helical staircase having an interconnected series of radial steps adapted to be swingably opened for providing vertically spaced horizontal support surfaces. The steps are...
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4371056 |
Guardrailing for vehicles
A vehicle such as a tank truck having a catwalk along its top, is provided with a guardrail therealong that can be lowered during transport. A ladder provides access to the catwalk; and the...
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4365689 |
Tilting marine ladder
A tiltable, portable, pivotable marine type ladder which is horizontally oriented in its normal position and tiltable to a vertical position by the application of an initial force in the vertical...
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4355700 |
Modular stairway system for installation on structures having non-linear walls
This application discloses a modular stairway system for circular structures or other structures having non-linear walls. The invention comprises a plurality of first stringer means with a...
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4330056 |
Mine conveyor belt man crossover
A man crossover for belt conveyors used in underground mines, the conveyors comprising spaced groups of belt-supporting rollers connected along each side of the conveyor by cables, comprises a...
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4328880 |
Circular ladder
A circular ladder for use along a cylindrical wall and having a single stringer which is disposed in a helical path around the cylindrical wall and an array of half treads disposed on each side of...
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4317504 |
Telescopic aerial ladder
The invention relates to a telescopic aerial ladder, especially intended to be mounted on a transportation vehicle. Said ladder comprises a number of ladder members superposed on each other, each...
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4316525 |
Ladder for play structure
A ladder for a children's play structure comprises spaced-apart, elongate side members extending from a first end of the ladder to a second end thereof. A plurality of rungs extend perpendicularly...
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4316524 |
Two-speed ladder
A ladder which can be ascended and descended at either of two rates and which comprises an array of half treads on one side of a stringer and an array of full treads on the opposite side of the...
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4303145 |
Ladder, platform & extension
A dual purpose ladder attachment usable singularly as a human body support platform with hand rails or in a pair as a scaffold jack. Each ladder attachment comprises two pairs of pivotally joined...
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4295544 |
Platform stepladder
A stepladder comprises a pair of front legs pivotally attached to a forward platform and a pair of rear legs pivotally attached to a rear platform. The front platform and rear platform are hingedly...
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4293055 |
Retractable safety handle means for a ladder
A retractable safety handle means for a ladder having a hinge means permitting horizontal movement in and between its retracted and its extended or handle-providing positions, and providing...
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4265333 |
Portable fence stile
A portable fence stile comprises in combination: (a) a U-shaped metal tubing of a sufficient strength to support a man and adapted to have the legs thereof placed over a fence in a generally...
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4253287 |
Step walker
A step walker for people with walking disabilities includes a pair of parallel, spaced-apart substantially flat, vertically faced guide railings fixedly positioned above either side of a stairway...
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4250977 |
Combined seat and step-ladder arrangement
The arrangement comprises a rigid structure having a support portion, e.g. in the form of a chair. On opposite sides of the support portion are hingedly mounted two step units. The step units are...
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4218793 |
Mounting assembly for bunk bed ladder or the like
A mounting assembly for hanging a bunk bed ladder from the upper bunk of a bunk bed wherein the vertical flange of one of the upper bed rails is formed with a pair of slots each having an entry...
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4211306 |
Emergency building escape ladder
This invention is an interlocking, segmented, ladder for use on high rise buildings and the like; wherein, the ladder is stored horizontally between floors of such building so as to not create an...
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4199040 |
Ship ladder
A ladder is provided which is especially adapted for shipboard use and which is safe and comfortable to use, of relatively light weight and occupying relatively small floor and overhead space. The...
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4193585 |
Handrail assembly for curved staircase
A handrail assembly for a curved staircase, which includes baluster means having support elements adapted to connect to a handrail with connectors such as screws and a handrail formed from stranded...
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4181195 |
Ladder lock
A ladder locking device designed for attachment to a frame-mounted ladder. The ladder lock includes a panel dimensioned to cover the front side of the ladder over an area including a plurality of...
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4146114 |
Manhole shield ladder
This invention relates to a specialized ladder for use with a ring-like shield bordering the entryway into a manhole, said ladder being characterized by hook-forming subassemblies depending from...
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4135605 |
Welding ladder with folding and sliding rungs
The present invention provides a portable light-weight ladder for use in connection with welding metal plates together positioned in an upright or vertical position comprising a main frame portion...
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4128223 |
Step ladder bracket
A vertically positioned post detachably affixed to a step ladder has a slotted clamp adjustably positioned thereon for holding the bail of a bucket on the step ladder or alternately engaging the...
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4126206 |
Ladder guard
A guard to bar access to ladder rungs comprising a first and second rigid sheet pivoted together. The upper sheet has an upper hook to hang over a rung of the ladder. The lower (second) sheet has a...
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4118816 |
Crossover or bridge
A crossover or bridge for shipment as a compact unit for assembly at an installation site comprising a bridge section and a pair of stairways for connection with opposite ends of the bridge...
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4113161 |
Combination carrying case and step unit
A combination carrying case and step unit wherein the case is adapted to contain small articles and is rigid to support the weight of a user standing thereon. The case is provided with means having...
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4100995 |
Telescopic set of steps with variable slope
A telescopic set of steps comprises at least two frames, each of which consists of two parallel members forming stringboards, one end of one of the frames being pivoted to a fixed support for...
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4063616 |
Safety ladder with caster assembly moveable positively to a retracted position
A safety ladder assembly having a plurality of steps and at least three support feet for supporting the ladder on a horizontal surface. A caster assembly having at least three casters for providing...
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4044857 |
Mobile ladder
A mobile ladder has a base, castors mounted to the base, a ladder connected to the base, a support member connected at one end to the base and at the other end to the ladder forming a structural...
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4034829 |
Step stool
A step stool includes a handrail attached to one side with non-skid steps that make it safe when standing on the step stool. Stabilizing bars are connected to the step stool to prevent it from...
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4030255 |
Folding handrail system for telescoping seating systems
A plurality of telescoping tubes form a rail assembly which is pivotally connected at its lower end to a post, a sleeve is slidably received in the uppermost tube which is provided with an upper...
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4023647 |
Freestanding ladder structure
A freestanding ladder structure has a first base member arranged on one side of an object to be bridged, a second base member arranged on the other side of the object, and a raised platform...
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4013140 |
Safety equipment
Safety equipment for a station at which access is gained to the tops of vehicles of differing heights comprising a platform alongside which a vehicle is located, an access installation articulated...
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3997183 |
Step-grab element system for a vehicle
A step-grab element system is provided for ascending to or descending from an elevated position on a vehicle. A step and a grab element are each pivotally connected to the vehicle and are connected...
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3995832 |
Collapsible bleacher rail
A collapsible bleacher railing in conjunction and for use with a collapsible bleacher section or sections, which includes normally vertical, upright, support sections having a plurality of...
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3991851 |
Safety ladder for above-the-ground swimming pools
A safety ladder for an above-the-ground swimming pool in which a pivotal ladder section is both detachable and capable of being swung up off the ground in order to prevent unauthorized access to...
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3985202 |
Hydraulically operated disappearing stairway
A unitary stairway (as distinguished from a sectional folding stairway) is adapted to assume an inclined operative position and an upper horizontal inoperative position above the ceiling of the...
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3973646 |
Ladder for swimming pools, and the like
An improvement in an access ladder for swimming pools allowing the ladder to be pivoted into and out of the interior of the swimming pool while remaining securely mounted at the surface of the...
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3968857 |
Device for preventing unauthorized access to permanent ladders
A shield having a front plate and a pair of side flanges extending rearwardly and outwardly therefrom to a point substantially adjacent a supporting wall or beam substantially encases the ladder...
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3964572 |
Adjustable safety ladder for above-the-ground swimming pools
A safety ladder for an above-the-ground swimming pool, such ladder being dependent from a platform mounted on top of the pool wall. A stationary ladder section is clamped to the platform on the...
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3884327 |
Invalid's portable step unit and attached carrying handle member therefor
An invalid's portable step unit and attached carrying handle member which is adapted for use by persons afflicted with an illness which makes it difficult or impossible for them to raise one or...
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3871479 |
TELESCOPING STAIRWAY
A telescoping stairway is provided which is particularly suitable for use as a fire escape ladder. The stair treads are carried on a plurality of telescoping channel members wherein the treads of...
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3858905 |
DEMOUNTABLE SAFETY LADDER WITH HAND RAIL
The demountable stairs comprise stairs, hook assemblies fastened on bars issuing forwardly from the uppermost terminal end of the stairs, each of the hook assemblies comprising a lug fastened to...
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