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7530429 |
Ladder having expandable members
A ladder including: first and second expandable members, each of the first and second expandable members including: a covering capable of expansion, the covering defining a cavity; and expansion...
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7464792 |
Aquatic ladder adapted for marine applications
The aquatic ladder was designed for ease of use, rather than ease of storage. It has wide, deep treads, arranged like a staircase, with side and upper railings which make it easy to enter or exit...
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7370725 |
Motorized rungless ladder
A device supported by a ground surface and a structure for at least one of elevating and descending a user. The device includes a first guide rail having a first channel extending along a length...
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7370598 |
Power driven marine ladder
A power driven marine ladder apparatus includes a vertically extendable cable section and a horizontally extendable rung section connected transversely to the cable section. An axially rotatable...
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7051839 |
Camouflage device for equipment legs
A device for providing three dimensional camouflage to a hunter's ladder stand having a seat, footrest, side rails and a plurality of rungs. The device has a hollow plastic tube with a split and...
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7047597 |
Hinge for folding ladders
Disclosed herein is a hinge for a folding ladder having first and second ladder frames. The hinge includes a main hinge unit, a subsidiary hinge unit, and a locking unit. The main hinge unit...
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6923214 |
Device for servicing an aircraft on the ground
A device for servicing an aircraft on the ground includes a rolling support and a cable or hose assembly having a first end for connection to a ground unit and an opposite second end for connection...
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6497304 |
Step ladder
An improved step ladder of a type having at least one step and a corresponding number of step pads. The improvement includes each step pad being replaceably and interchangeably attached to an...
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6467234 |
Stairway system
A prefabricated stairway module ( 10, 11 ) comprises a first step and a second step, each step ( 14 ) having a tread member ( 13 ) and a riser member ( 15 ). The stairway module further has fixing...
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6415891 |
Scaffold stair
A scaffold stringer which is plate and a series of tread mounts attached at substantially uniform distances along the plate, the tread mounts forming an angle with the plate, each tread mount...
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6386320 |
Portable support structure useful as ladder or stepladder
The invention concerns a support structure characterized in that it comprises at least: a shaft ( 1 ) whereof the two ends are designed to be urged to rest on two fixed elements, one of which may...
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6378654 |
Ladder pivotally attached to a generally vertically extending surface
A ladder attached to a generally vertically extending wall or surface which is particularly useful when attached to the side of vehicles which can pivot outwardly to a slight extent at the bottom...
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6129179 |
Laterally extensible ladder
A laterally extensible ladder comprises first and second uprights having a plurality of adjacent rung assemblies mounted therebetween. Each rung assembly includes a first hollow rung element that...
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5896946 |
Boarding ladder and winch mount system for boat trailers and the like
An access step and winch mounting assembly is provided for a load carrying device, such as a boat trailer. The assembly includes a front member for mounting on a frame of the trailer, a top member...
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5692581 |
Anti-slip device for ladder rungs
A cover for a rung of a ladder consisting of an elongate member (12) configured to spring clamp over the rung of the ladder and a layer (16) of anti-skid or anti-slip material removeably fastened...
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5515942 |
Ladder stiles and ladders produced therefrom
The invention is directed to strong, lightweight, electrically non-conducting ladder stiles and ladders formed therefrom. Each ladder stile comprises a tension and compression portion structurally...
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5515657 |
Winding stair
A winding stair for spiral ascension within a building structure. The stair includes a newel post which has a plurality of elongated slots horizontally formed around the periphery at different...
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5343980 |
Child/parent play ladder
A ladder which makes it possible for one person to climb onto another, particularly, a ladder which can be worn by an adult for the purpose of enabling a child to climb up the ladder and onto the...
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5323874 |
Combination ladder and stair
The invention disclosed comprises a combination ladder and stair for use by children which incorporates stair-like treads and risers with ladder-like rungs to achieve safe climbing activity. The...
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5277273 |
Simplified unitary tree climbing device
A readily portable device for enabling a vertical columnar structure such as a tree, pole or the like to be climbed without causing damage thereto, this device comprising a pair of rigid, elongate...
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5277272 |
Manhole ladder
A non-metallic ladder for use in a manhole in which permanent manhole steps have been installed and spaced relation from the top of the manhole to a position above the bottom and there being a pair...
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5203427 |
Fire escape ladder with integral air cushion
A portable fire escape ladder with an inflatable air cushion is provided. The ladder has an upper window sill engaging portion, and a plurality of frame members interconnected with rungs. The air...
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5180031 |
Gardener's aid for sloped ground
A gardener's aid for sloped ground formed of first and second elongated paralleled spaced apart strut members, a plurality of generally flat spaced apart paralleled support members each having one...
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5145031 |
Electric ladder
An adjustable ladder comprising, a pair of side supports, a device for retaining the supports in a spaced relationship, a rung, a device for slidably mounting the rungs in the supports, and a...
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5080193 |
Improved hunter's ladder stand
An improved hunter's ladder stand includes irregularly shaped legs and rungs which provide structure that blends into an outdoor environment comprising irregularly shaped trees, branches and...
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5060757 |
Adjustable rungs for ladder
Adjustable cross pieces or rungs for aiding in forming a ladder using a tree cut at predetermined lengths and trimmed of branches. The cross members include two end members and a centrally located...
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5058339 |
Curved stairway and method
A curved stairway is illustrated wherein the usual wooden components, including the stringers A, are provided with steel reinforcement, including metallic stringers B provided with cross bracing D...
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4997061 |
Ladder assembly, particularly for use with swimming pools
An A-frame ladder comprises two side rail assemblies and a platform guard rail assembly each provided in their rail members with elongate oval apertures defining handholds or hand grips. Steps of...
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4991690 |
Portable hunting ladder
A portable hunting ladder has a base section and one or more slidably connected ladder sections. Each ladder section has a stand-off device and a device for securing the section to the tree being...
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4974701 |
Step ladder construction
A step ladder construction is provided comprising a plurality of steps extending between a pair of struts. Coupling means join each of the steps with the pair of struts. Each of the struts has the...
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4967879 |
Ladder
A ladder, especially for use in manholes, where the rungs are mounted in double-walled sidepieces via respective sleeves. Each sleeve has a body wall that, to uniformly support introduced forces,...
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4724925 |
Boat boarding ladders
A boarding ladder which may be mounted on a topsides surface of a boat to be swingable between a raised position where all parts of the ladder are above the waterline of the boat and a lowered...
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4716988 |
Ladder step construction for use with recreational vehicles and boats
A new construction method for a ladder for use on recreational vehicles and boats is disclosed. The ladder comprises two parallel metal tubular rails and a plurality of extruded aluminum steps,...
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4715474 |
Scaffold system
A portable scaffold having tubular structural elements has necked fittings extending into the ends of the tubular elements and attached thereto by adhesive which is introduced through an entry port...
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4687076 |
Segment connector for modular ladder
A segment connector to connect two segments of a modular ladder which have through holes near ends of the segments includes: a connector housing having a top open end, a bottom open end, and a side...
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4655320 |
Ladder means and method of production
A ladder comprises a pair of spaced stiles, each having a channel shaped cross-section with the flanges of each stile directed towards those of the other, and a plurality of rungs interconnecting...
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4619084 |
Articulating, self-supporting staircase
A stairway construction, specifically, an articulating self-supporting staircase. The staircase comprises a plurality of individual, interconnected elements, each element having a tread and a...
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4603758 |
Ladder construction
A ladder consisting of a pair of spaced rails, a plurality of rungs having opposite end portions with first holes extending therethrough for receiving the rails in complementary mating...
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4548294 |
Ladder for a boat and method of fabrication
A removable ladder for placement over the side of a boat and extension into water for aiding ingress and egress of swimmers and the like is disclosed and includes a pair of elongated, generally...
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4538314 |
Boarding ramp
A removable and adjustable ramp for aiding an animal or human into a small boat from water in which the boat is floating comprising an inclined planar member removably attached to the vertical wall...
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4537283 |
Ladder assembly
A ladder assembly for use on an articulating member of a moveable vehicle which includes a main ladder mountable on the member, a truss assembly coupled to the main ladder and couplable to the...
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4535871 |
Unitary stairway
A stair or ladder which has a central stringer adapted for mounting between an upper level and a lower level at a relatively steep angle of inclination, and a plurality of tread members disposed in...
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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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4463827 |
Adjustable handhold
In accordance with the present invention a handhold (10) is provided including a base handhold member (12) including a first fastening flange portion (16) and a longitudinally extending rod portion...
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4457398 |
Elements to be assembled to form temporary stair
Elements to be assembled to form in situ a temporary stair, from a pair of planks (1,1') or longitudinally sawn boards, or identical cross-section, intended for serving as stringers and which...
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4408431 |
Shoring equipment
An improved shoring frame adapted by a unique design to utilize relatively thin-walled aluminum tubing with a reasonable load-rating, be easily manufactured, and be compatible with existing steel...
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4373609 |
Stairway stringers constructed of cast, readily-assembled units
A stairway is constructed of one or more stringers which are assembled from a plurality of stringer units of cast material. The stringer units are so constructed as to allow for their simple and...
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4371055 |
Method of manufacturing a fiberglass ladder
A combination step and extension ladder manufactured of composite material such as fiberglass is disclosed. The inner and outer side rails are molded fiberglass so that the fibers are angularly...
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4356888 |
Structural joint
A structural joint for joining two elements, the first element having an elongate major tongue of malleable deformable material and in one embodiment an elongate minor tongue, the second element...
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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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