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Match Document Document Title
7578632 Secure interlocking system for plastic materials  
A first plastic component and a second plastic component are joined together by an expansive joint system on the first plastic component and a driving joint system on the second plastic component....
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...
6902037 Device for securing rope ladder steps  
This invention is directed to a device for securing a step of a rope ladder to the rope. The device includes an upper and a lower wedge collar, each of which has a central slot through which the...
6868944 Adjustable stair stringer and railing  
An adjustable stair stringer and railing construction assembly is disclosed. The assembly is adapted to use a pair of parallel stringer arms for each side of the stair, a riser/tred support bracket...
6817447 Stair or ladder steps of the plate-shaped step type  
A stair step of the plate-shaped step type comprises plate members bent downwards from the stepping surface at all four rims. The plate members are welded together at the corners where they abut...
6591942 Process for manufacturing a composite material ladder and ladder obtained with said process  
A process for manufacturing ladders comprises the following steps: arranging a plurality of rungs ( 2 ) of a material comprising a plurality of reinforcing fibers ( 2 a ) associated with a binding...
6145621 Boarding ladder for a boat bow  
A foldable ladder suitable for boarding a boat from the bow end thereof having laterally spaced side rails each with upper and lower portions. The upper and lower portion of one side rail are...
6032759 Ladder with anti-deformed side rails  
A ladder with anti-deformed side rails comprises two tubular side rails, a plurality of rungs, and two tubular inner bushings. Each of the bushings is tightly fitted with the inner surface of each...
6000496 Flexible step assembly for vehicles  
A flexible step assembly for vehicles which includes a number of vertically disposed horizontal steel tread members attached at their ends to flexible side members. A spring loaded assembly is...
5636483 Adjustable stairstep system and process of assembling and installing same  
A prefabricated stair system having individually pivotally mounted right angular brackets on opposed stringers, has a control bar which removably contacts the brackets to assume all brackets are...
5553421 Structural building components  
Prefabricated, preferably pre-cast concrete, stringers and treads can be employed to provide either a staircase of any required inclination, a horizontal walkway or a ramp of a required...
5475954 Modular support element adapted to form a support for a tread of a staircase  
A support for treads of a staircase is formed by a plurality of support elements each comprising an upper plate and a lower plate, the lower and upper plates of each element being adapted to rest...
5244058 Portable fence-scaling step  
A portable step has a tread member to which is pivoted corresponding ends of a pair of support arms that terminate at their opposite ends in projections which extend from the arms at an acute angle...
5156234 Ladder structure  
A single run or extension ladder particularly suitable for use where electrical safety is significant. Stiles 6 are each formed from a pair of elongate hollow members 5 fabricated from glass-fibre...
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...
5143174 Dismountable ladder  
A dismountable ladder for use with transom, swim or dive platforms having a pair of similarly shaped vertical upper side members. The upper end of each upper side member is formed as a U-shaped...
5134820 Adjustable built-up stair  
A built-up stair assembly of includes a plurality of stair units, of which the angular position of each unit stair can be flexibly adjusted horizontally as well as vertically. Each stair unit...
5131197 Mounted stairway  
The first preferred embodiment of the subject invention is a mounted stairway built on a central single stringer which utilizes stairs horizontally adjustable with regard to inclination of the...
5123210 Flight of stairs  
The invention concerns a flight of stairs with a multiple of steps--where each step is firmly connected at least at one lateral end with the subsequent step by two vertical members, and where the...
5085020 Portable, assemblable-disassemblable staircase  
A portable, assemblable-disassemblable staircase includes a plurality of stair units to be assembled and disassembled, each of the stair units including a horizontal base plate, an upward joint...
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...
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...
5050861 Adjustable bench-step  
An adjustable bench-step for use in exercising, having an upper platform that is easily and securely insertable into a base, with the upper platform further being both adjustable vertically and...
5014818 Children's vanity step-stool  
A step-stool for enabling a child to climb up to the top surface of a cabinet made of a top piece, a bottom piece and a middle step or platform piece adapted to slide out from between the top piece...
4917216 Segmented ladder construction  
A construction unit for assembling into a ladder like assembly wherein the unit is provided with parallel and opposed side rails joined by at least one cross-member, the ends of the side rails...
4901818 Fire fighting roof ladder accessory  
A firefighting roof ladder accessory that is designed to be supported between two roof ladders. The accessory comprises a beam, having two foot supprot surfaces that are perpendicular to each...
4871047 Adjustable grab iron  
This invention relates to grab irons and more particularly to two-piece, adjustable grab irons. The grab iron consists of a handhold-shape containing a mounting flange portion and a rod member as...
4842099 Foldable ladder  
A foldable ladder has collapsible crosspieces having a 90-degree pivot in the middle, the crosspieces being mounted to opposite side rails likewise having 90-degree pivots. Push rails are provided...
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,...
4798264 Kneeling aid  
A kneeling aid to facilitate kneeling has planar, rectangular, platform, the upper surface provided with recessed storage compartments bounded by upstanding ribs, and a pair of three-sided recesses...
4798030 Modular support for staircase steps  
The modular support for staircase steps comprises a substantially vertical box-like body upwardly defining a horizontal base plane for a related step, a male cylindrical element and a...
4723631 Foldable ladder  
A ladder made of a rectangular main frame, spaced parallel rods interconnecting the two long side legs of the ladder, and step panels each pivotally mounted at its front corners to one rod for...
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...
4696372 Portable step and carrying device for stud walls  
A portable step-forming device releasably attachable to a vertical wooden stud comprises a U-shaped gripping member for closely receiving a stud member, a step member attached to one prong of the...
4683981 Molded hard elastomer steps and replacement and spreader steps for rope ladders and fittings therefor, as well as molding method therefor  
A rope ladder of the type having two spaced-apart pairs of ropes, has a metal frame for each step and has tubular nylon members with cylindrical bores, extending vertically through sets of through...
4655318 Step assembly  
A manhole step assembly including a substantially U-shaped metal rod and a corrosion resistant covering molded about the rod is taught. The covering has a tapered portion formed at the free ends...
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...
4655321 Rope ladder with molded hard elastomer steps and method for assemblying the ladder therefor  
A rope ladder of the type having a series of ladder steps and two spaced-apart pairs of ropes. Each step has a metal step frame about which is molded a hard elastomer body. Each step has a...
D287283 Portable half-step stairway unit  
4627200 Recessed mortise stair  
A stair having a central stringer and two side stringers adapted for mounting between an upper level and a lower level at a relatively steep angle of inclination. A plurality of tread members are...
4620610 Tree step  
A tree step (20) comprises a first member (24) which has a second member (30) pivotally connected thereto. Connected to the first member (24) is a braided rope (28) which substantially encircles a...
4605097 Portable tree stand  
A portable tree stand comprised of two main runners (10) attached to four extension arms (11) with bolts (12) and fastened by wing nuts (13). The main runners (10) have a slot (21) to receive three...
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...
4546856 Fender beam and life ladder in one  
A fender beam and life ladder in one which serves as a life ladder mounted on a wall surface of a quay or the like and extending substantially vertically at least from a water level to an upper end...
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...
4531612 Escape ladder  
The invention relates to a portable emergency fire escape ladder comprising a large double hook adapted to fit over a window ledge, tubular steps suspended by means of galvanized steel cables, the...
4520897 Portable steps  
Portable steps are disclosed herein including a plurality of step rungs arranged next to each other in parallel side-by-side relationship wherein each step rung has an elongated rigid member...
4516367 Modular support for stairway steps  
The support comprises a horizontal resting deck for a respective step. A first wall including a vertical cylindrical portion is made rigid, on the convex side thereof, with said resting deck and...
4507844 T-assembly and method of obtaining same  
This T-assembly of the tenon and mortise type for two perpendicular metal tubes comprises a mortise formed in one tube and having an omega shape in cross section, through the local distortion of...
4508321 Latticed tubular fence and method of making same  
A tubular fence is made by fixing a vertical tube on a horizontal tube. A method of making the same is disclosed wherein an opening part is formed on the side of the horizontal tube. A pin having a...
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