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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 7059451 | Load lowering system A system for mechanically lowering a load from an elevated position to a lower position in a relatively slow and controlled manner using only gravity and frictional forces. The system includes a vertically aligned glide rod, a glide collar that moves longitudinally ... | 06/13/2006 |
| 7051497 | Portable ladder for mounting a horse A portable ladder is presented for assisting a rider to mount a horse. The portable ladder is flexible and attaches to the saddle. The saddle need not be specially adapted to receive the portable ladder. The ladder may also be folded up for carrying or stowing while... | 05/30/2006 |
| 7004287 | Hidden fire escape An improved safety ladder and safety window as well as a method for use are disclosed. The ladder is discrete and compact, for convenience. The ladder is stored in a hidden container that is an extension or an addition to a normal window, or made part of an existing... | 02/28/2006 |
| 6994183 | Fire escape ladder A fire escape ladder assembly adapted for mounting between wall support members in a building cavity of a building structure. The assembly includes a fire escape ladder enclosure mounted in the building cavity and a mounting structure passing through the enclosure a... | 02/07/2006 |
| 6991550 | Climbing steps for playground structure A climbing steps rail set includes a first molded plastic rail having a lower end configured to rest on a lower support surface, an upper end configured to be coupled to an elevated support structure, and a first plurality of apertures formed in the rail and configu... | 01/31/2006 |
| 6671897 | Lift assisting device and stabilizing device for a bather and a shower, respectively A lift assisting device and a stabilizing device for a bather and a showerer, respectively. The device includes a rope and a plurality of rungs. The rope is suspended from a ceiling. The plurality of rungs are operatively connected to the rope for graspin... | 01/06/2004 |
| 6530455 | Escape ladder An escape ladder provides emergency egress from a dwelling and generally comprises a hook assembly connected to a ladder assembly. The hook assembly includes a pair of laterally spaced clamps and the ladder assembly includes a pair of straps attached to t... | 03/11/2003 |
| 6279681 | Collapsible ladder having highly nesting rungs with integral stand-off projections A collapsible ladder having rungs of a relatively strong and thin material with integral stand-off projections that allow the ladder to be safely descended and of a cross-section that allows the ladder rungs to nest to a high degree of compactness. The la... | 08/28/2001 |
| 6135239 | Fire escape ladder A self-contained fire escape apparatus for mounting in a wall of a building adjacent an associated window includes a collapsible ladder. A cover is securely attached to a first end of the ladder. A box is configured to provide storage space for the ladder... | 10/24/2000 |
| 6102155 | Combined window and emergency escape ladder An emergency escape system (16) for a window (13) of a building (10) includes an escape ladder (36) stored within a window frame (21). A sill part (23) covers a recess (32) containing the escape ladder and allows a window part (22) to form a normal seal w... | 08/15/2000 |
| 5971105 | Escape ladder An escape ladder stored in an interior wall of a building, beneath a window. The ladder is deployed by placement through a window with a storage container providing a step for ease in exiting. Ladder steps are secured by a flexible strap with each step in... | 10/26/1999 |
| 5605205 | Readily deployable portable escape ladder A readily deployable, portable escape ladder includes nestable rungs maintained in a releasable, stacked state. The ladder includes a cover having a releasable fastening system which, when released, permits the ladder to move from the stacked state to an ... | 02/25/1997 |
| 5467841 | Escape window frame assembly Disclosed is a new escape window frame assembly for facilitating emergency egress from a building by using a window frame having a concealed collapsible escape ladder which is cleared for deployment when a window mounted within the frame is pivoted outwar... | 11/21/1995 |
| 5372217 | Emergency escape device An emergency escape device includes a rectangular carrier in which a rope-ladder is stored. The carrier includes upper and lower horizontal beams, and two vertical side beams interconnecting the upper and lower horizontal beam. Each of the vertical side b... | 12/13/1994 |
| 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 |
| 4867275 | Escape ladder An escape ladder for side rails with multilevel dwellings comprising a pair of side rails inverted "J" hooks which are pivotal outward to engage a window sill and inward to fold. The side rails extend downward sufficiently to support two or three more ste... | 09/19/1989 |
| 4770373 | Quick release ladder device for helicopters A rescue ladder for air to ground deployment is provided with a quick release mechanism which enables the ladder to be detached from an aircraft in case of emergency. The quick release mechanism includes fastener pins mounted on a rotatable control shaft,... | 09/13/1988 |
| 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 |
| 4709783 | Apparatus for installing escape device for slowly lowering a body An apparatus for installing an escape slow lowerer stably at an arbitrary place on a building. The apparatus has a ladder body, horizontal rods mounted on the ladder body and vertical rods mounted slidably and lockably on the horizontal rods to form a gat... | 12/01/1987 |
| 4595075 | Collapsible ladder assembly Collapsible ladder assembly comprising a ladder storage container having, in closed condition, a fixed upright rear wall, an upright front wall and bottom and top walls joining the front and rear walls, a collapsible ladder being held within the container... | 06/17/1986 |
| 4475628 | Landing net A net for use as an embarkation-debarkation net having spacer blocks provided integrally therewith for maintaining the plane of the net configuration spaced forwardly of a rear portion of the respective distributed spacer blocks. Securing elements are pro... | 10/09/1984 |
| 4434871 | Emergency escape ladder The present invention entails an emergency escape ladder that can be used to descend from one level of a building downwardly to another level, after which the ladder may be repeatedly repositioned for descending on downwardly in a like manner. Functionall... | 03/06/1984 |
| 4399891 | Anchoring device for flexible ladder An anchoring device for use with a flexible ladder. The ladder is provided with an upper end having connecting elements. The anchoring device is arranged to connect the upper end of the ladder to an upstanding annular access manhole projection, such as pr... | 08/23/1983 |
| 4298097 | Escape-ladder A device at an unfoldable escape-ladder assembled of rungs (1), the ends of which are attached between flexible lateral members (2), preferably steel wires, said rungs (1) being longish and of plate-shaped material and capable to be stacked, the upper por... | 11/03/1981 |
| 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 |
| 4157130 | Fire ladder and method of constructing same A fire ladder includes as opposite sides a pair of elongate flexible cables in the form of interwoven strands of wire. Hollow tubes flattened and scored on their upper surfaces extend rigidly between the cables to provide the ladder rungs. The rungs have ... | 06/05/1979 |
| 4143741 | Portable escape ladder A portable escape ladder comprises a bracket for gripping over a building window ledge, a pair of chains suspended from the bracket and supporting a series of spaced transverse rungs therebetween and optional stand-off devices attached at least to some of... | 03/13/1979 |
| 4139079 | Flexible stile or rope ladder for climbing poles or like members A flexible stile ladder is disclosed wherein the midpoints of the ladder steps or rungs are slidably connected to the pole. Preferably, the slidable connectors are slides which operate in a track carried by the pole. The invention is particularly useful f... | 02/13/1979 |
| 4061092 | Suspended shelf bracket There is disclosed a novel bracket adapted to support and suspend a shelf platform to further permit the suspension of a plurality of shelf platforms for the use of a plurality of shelf brackets, each bracket formed by a support member including an upward... | 12/06/1977 |
