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| Number | Title | Issue Date |
| 7234203 | Locking hinge for folding ladder A hinge for a folding ladder including a hinge latch movable between a locked position and an unlocked position disposed within a hinge latch cavity. The hinge latch includes a first locking portion protruding therefrom, an elongated slot formed configured to slidin... | 06/26/2007 |
| 7195301 | Roll up ramp system A roll up ramp system facilitates transition between a first elevation and a second, higher elevation. The roll up ramp system includes a securement device temporarily connecting a roll up ramp to the second, higher elevation. Further included by the roll up ramp sy... | 03/27/2007 |
| 7192240 | Roll up ramp system A roll up ramp system facilitates transition between a first elevation and a second higher elevation. The roll up ramp system includes a plurality of load-bearing links connected to one another having top and bottom faces and being comprised of at least one load-bea... | 03/20/2007 |
| 7013518 | Collapsible loading ramp A collapsible loading ramp affixable to a raised surface in a non-permanent manner extending from the raised surface to the ground. The ramp is foldable by way of a hinge connecting the first ramp section to the lower ramp section. Rung units attach to the first and... | 03/21/2006 |
| 6994655 | Horizontal bar A horizontal bar includes two side supports, a top bar, and a swing member. The side supports are provided at upper ends with two symmetrical locating holes, through which two outer ends of the top bar are extended to thereby connect the top bar to the side supports... | 02/07/2006 |
| 6945360 | Modular ladder assembly A modular ladder assembly includes at least two ladder assemblies, each assembly having first and second parallel stiles and a plurality of spaced apart rungs disposed between the first and second stiles, the plurality of rungs being perpendicular to said first and ... | 09/20/2005 |
| 6318498 | Collapsible ladder A collapsible ladder provides a plurality of segments, each segment associated with one rung of the ladder. The segments may be folded into a flat or planar configuration, after which each segment may be folded against adjacent segments, thereby forming a... | 11/20/2001 |
| 6119811 | Multiple functional, foldable, and portable ladder A multiple functional, foldable, and portable ladder comprises a plurality of ladder units 5, wherein the ladder unit has a supporting rod on the two sides thereof. Each supporting rod is foldable so that the ladder is expandable for upstanding or foldabl... | 09/19/2000 |
| 5605203 | Automatic foldable emergency ladder system An automatic foldable emergency ladder system for use in a building having a smoke detecting device includes an inverted L-shaped housing having a horizontal portion and a vertical portion and being securely mounted to a perimeter wall of a roof of the bu... | 02/25/1997 |
| 5211260 | Collapsible ladder A collapsible ladder that is relatively rigid and includes friction means for controlling the rate of deployment. The ladder comprises a plurality of tubular rungs and side support members pivotally connected between each end of adjacent rungs, each side ... | 05/18/1993 |
| 5018600 | Extendible ladder An extendible ladder includes a sealed housing for housing the ladder in a collapsed condition. The ladder mounts to a support wall such as the side of a home or an apartment building. The ladder is extendible during an emergency by opening the sealed hou... | 05/28/1991 |
| 5012892 | Escape ladder A normally retracted escape ladder assembly that includes a framework mountable on a building wall, a plurality of ladder sections movably interconnected and having at least one such section attached to the framework, a platform, and a latch maintaining t... | 05/07/1991 |
| 4926967 | Folding ladders A folding ladder comprises a series of modules, each module including a pair of spaced, parallel stile sections connected together by a transverse tread section. The modules are of decreasing size and each module, except for the largest one, is pivotally ... | 05/22/1990 |
| 4884659 | Collapsible ladder A relatively simple, lighweight, portable, collapsible ladder includes a plurality of H-shaped sections pivotally interconnected end-to-end to define a flat bundle in the stored or non-use condition. The sections can be unfolded to a flat, extended condit... | 12/05/1989 |
| 4751982 | Foldable ladder A foldable ladder having a plurality of rigid steps and inwardly folding arms pivotably secured to the steps so as to be rigid in use by capable of being folded for storage.... | 06/21/1988 |
| 4742795 | Stern gate for a boat hull A hull for a boat includes a lower hull having a bottom below a static waterline and freeboard sides above the waterline. An aft passenger cockpit has a floor above the waterline and a lower stern extends across the rear of the lower hull at least partial... | 05/10/1988 |
| 4625831 | Deer stand A hunting stand pivotally mounted on the rack of an all-terrain vehicle. The stand comprises a pair of mounting brackets, a three-sectional ladder having pivot pins and locking pins for allowing the ladder to be positioned between an extended and a collap... | 12/02/1986 |
| 4613013 | Suspension ladder A suspension ladder comprises a string of identical rigid rectangular sections (1) which are hinged together about a series of parallel axes adjacent their longer rear edges (2), and each of which has one or more apertures (11) forming a rung of the ladde... | 09/23/1986 |
| 4574918 | Ladder locking mechanism 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 progressible narrower as they approach the top of the ladder, when folded t... | 03/11/1986 |
| 4541507 | Universal folding ladder for boats A universal folding ladder for inflatable boats and pleasure craft comprising a tubular structure intended for straddling the gunwale of a boat and including at least two L-like elements extending parallel to each other and being interconnected at the end... | 09/17/1985 |
| 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 used with the slidable ladder described in U.S. Pat. No. 4,4... | 05/28/1985 |
| 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 narrower as they approach the top of the ladder, when folded ... | 01/15/1985 |
| 4457391 | 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 progressible narrower as they approach the top of the ladder, when folded t... | 07/03/1984 |
| 4448283 | Portable fold-up ladder A portable and convertible ladder comprising a series of u-shaped modules each movably connected to the other by hinge means, said modules having progressively decreasing widths as they approach the top of the ladder when in an open mode, said modules hav... | 05/15/1984 |
| 4260038 | Folding sawhorse frame A pair of triangular supports are provided with cross member sockets on the upper ends thereof. A cross bar extends between the end supports and is pivoted to each so that they can be folded downwardly upon the cross bar for storage. Braces are pivoted by... | 04/07/1981 |
| 4231449 | Foldable ladder A foldable ladder having a plurality of rigid steps and of rigid links which steps and links are pivotally secured together with pivot pins to result in a rigid ladder in use, but capable of being folded for storage.... | 11/04/1980 |
| 4193476 | Link ladder A multi-purpose, lightweight, portable ladder comprising a plurality of link elements pivotally secured together in end-to-end relation, each link being of a substantially A-shaped configuration wherein one end of a first link is disposed between the legs... | 03/18/1980 |
| 4102433 | Ladder An extension roof ladder is disclosed having conventional extension ladder sections for use at the side of a building and connected thereto a flexible roof ladder section having a plurality of shorter subsections for use on the near side of a roof and one... | 07/25/1978 |
| 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 pivotal movement about a horizontal axis, and the other frame b... | 07/18/1978 |
| 4067413 | Collapsible ladders A collapsible ladder for use as an emergency escapeway is described which has two side members between which rungs extend. The side members are each composed of a plurality of sections, which are pivoted to each other at overlapping ends. In one embodimen... | 01/10/1978 |
| 4022292 | Portable tree stand or crows nest A portable tree stand which can be used for hunting or other purposes and which can be pushed to any desired height with the use of a pole which fits into a receptacle and includes a pair of rollers mounted at an angle on one side of the tree and a roller... | 05/10/1977 |
| 3946834 | Self storing fire escape ladder A self storing fire escape ladder of foldable type, including a plurality of pivotally interconnected rung sections and enlarged hook means for engaging a window sill or similar structure during use. The hook means is of effective width less than that of ... | 03/30/1976 |
