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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7658220 | Barrier means Barrier means are provided having a frame including a plurality of frame members, movable between a first substantially erect condition and a second substantially folded condition. At least one of the frame members including two or more telescopically mounted portio... | 02/09/2010 |
| 7422048 | Transportable safety barrier A foldable safety barrier to be secured in and removed from a door opening, comprising a frame having a covering member (28), such as a piece of fabric, said frame being formed by upper and lower cross members (1, 2) connected with first and second lat... | 09/09/2008 |
| 7398612 | Collapsible support frames Collapsible structures are provided that have one or more support frames, each having a foldable frame member that has a folded and an unfolded orientation, with the frame member defining a periphery for the support frame. Where more than one support frame is provid... | 07/15/2008 |
| 7316257 | Portable screen assembly A portable screen assembly which is easily assembled and highly compact when disassembled is provided. The assembly includes a collapsible base having at least three leg members and a central support pole. The assembly includes top and bottom frame members in parall... | 01/08/2008 |
| 7263732 | Collapsible assembly A blanket or mat assembly includes a panel having a foldable frame member that has a folded and an unfolded orientation, and a sheet material substantially covering the frame member when the frame member is in the unfolded orientation, with the sheet material assumi... | 09/04/2007 |
| 7211722 | Structures including synchronously deployable frame members and methods of deploying the same A lightweight structure for space application is deployable from a compact bundle of interconnected struts into a plurality of tiled substantially rectangular bays. Each bay preferably comprises four or six hinged strut members having substantially rectangular cross... | 05/01/2007 |
| 7150127 | Partition system A partition system for office spaces generally includes a framework and a plurality of different types of decorative and/or functional tiles mountable to the framework. The framework includes I- and C-shaped vertical frame members which are adjustably joined by uppe... | 12/19/2006 |
| 7090905 | Flat or semi-flat element including a frame Flat or semi-flat element (1) including a partly or completely circumambient frame (2), which element (1) is manufactured through molding of a polymeric material. The element (1) includes a carrying structure, constituted by the frame ( | 08/15/2006 |
| 7062872 | Lightweight collapsible signaling device A collapsible signaling device bearing a pair of opposed message panels is convertible between a display configuration and a compact linear storage configuration. The message panels are joined together at spaced apart points along their periphery using spacers to fo... | 06/20/2006 |
| 7036798 | Mobile barrier to control litter and wind A mobile barrier for use in wind control, reduction of blowing litter and suspension and transport of airborne contaminants with applications in areas of landfill maintenance, agriculture, erosion control, and snow control is described. The mobile barrier is a large... | 05/02/2006 |
| 6981540 | Proper tent door A tent door which opens and closes in a manner similar to that of a regular house door, yet is in keeping with the requirements for mobility of being light-weight and easily taken apart or reassembled. Such a door being comprised of a fabric panel (54), suppo... | 01/03/2006 |
| 6942000 | Coupling mechanism and panel for sectional door An improved coupling mechanism for adjacent panels of a sectional door, the panels including facing, adjacent edges; the coupling mechanism including at least one recess formed in or disposed adjacent to the facing edge of each panel, and also including at least one... | 09/13/2005 |
| 6915833 | Portable screen wall section Portable screen wall section(s) are utilized to enclose an opening or openings of a building structure that is mostly and preferably made up of fabric and mesh screen or netting, to allow for an outdoor atmosphere, while eliminating the entry of unwanted insects and... | 07/12/2005 |
| 6701996 | Assembled and convertible decorating assembly An assembled and convertible decorating assembly includes at least three partition assemblies. Each partition assembly mainly includes several fixing elements, a pair of vertical rods, a pair of horizontal rods, a decorating element, and a pair of auxilia... | 03/09/2004 |
| 6684894 | Collapsible structures having overlapping support loops Collapsible structures are provided having at least two panels, with each of the panels having a flexible loop member defining a closed loop and adapted to assume an expanded position and a collapsed position, and a fabric for partially covering the loop ... | 02/03/2004 |
| 6681833 | Screen frame having corners under compression A frame for a ventilation screen-frame assembly includes a body having a mounting surface for receiving ventilation screen material. In one example, the body has at least three V-shaped cuts partially through it. Each V-shaped cut leaves an edge of the bo... | 01/27/2004 |
| 6626227 | Apparatus and method for a window shutter system An apparatus and method for a window shutter system are disclosed. A window shutter system (100) is disclosed that includes a plurality of shutter frames (106, 108). Each shutter frame (106, 108) includes a plurality of elongate members (126, 130). Each o... | 09/30/2003 |
| 6581667 | Debris barrier A removable debris shield and method to internally protect a portion of a vessel, such as a pressure vessel, during fabrication. Pliant material sufficient to span a desired interior portion of the vessel has a hem located around the periphery of the mate... | 06/24/2003 |
| 6532703 | Portable screen door A portable screen door for positioning in an apartment doorway. The portable screen door includes a frame having a first side bar, a second side bar, a top bar and a bottom bar. A screen extends between and is attached to the first side bar, the second si... | 03/18/2003 |
| 6499498 | Collapsible structures having overlapping support loops Collapsible structures are provided having at least two panels, with each of the panels having a flexible loop member defining a closed loop and adapted to assume an expanded position and a collapsed position, and a fabric for partially covering the loop ... | 12/31/2002 |
| 6497268 | Screens A screen, typically for use as a wardrobe or closet door, is disclosed. The screen has a flexible member mountable within a frame, one or more of the corners of the frame being provided with cam arrangements for varying the length of the frame in order to... | 12/24/2002 |
| 6357510 | Collapsible support frames Collapsible structures are provided that have one or more support frames, each having a foldable frame member that has a folded and an unfolded orientation, with the frame member defining a periphery for the support frame. Where more than one support fram... | 03/19/2002 |
| 6182740 | Portable room divider apparatus A portable room divider apparatus for providing privacy in any room, in particular, in any hotel and motel room. The portable room divider apparatus includes a base having a pair of elongate members and a cross member removably interconnecting the elongat... | 02/06/2001 |
| 6170554 | Apparatus and method for a window shutter system An apparatus and method for a window shutter system are disclosed. A window shutter system (100) is disclosed that includes a plurality of shutter frames (106, 108). Each shutter frame (106, 108) includes a plurality of elongate members (126, 130). Each o... | 01/09/2001 |
| 6145528 | Portable blind A blind having a support system and a sheet material secured to at least a portion of the support system. The support system includes a number (n) of horizontal support members and a number (n+1) of vertical support members, wherein n corresponds to an in... | 11/14/2000 |
| 6138701 | Collapsible structures having overlapping support loops Collapsible structures are provided having at least two panels, with each of the panels having a flexible loop member defining a closed loop and adapted to assume an expanded position and a collapsed position, a fabric for partially covering the loop memb... | 10/31/2000 |
| 6134844 | Method and apparatus for displaying information A furniture system is particularly adapted to support group activities in open plans, and the like. A plurality of columns support an overhead framework on the floor of a building in a freestanding fashion at a predetermined elevation, generally above ave... | 10/24/2000 |
| 6053558 | Cover assembly for the cargo area of a vehicle A cover assembly for the cargo area of a vehicle includes a plurality of rails which can be attached to the walls of a truck bed and a cover having an edge which is engageable by the rails. The rails are connected together by corner members. The corner me... | 04/25/2000 |
| 6038802 | Portable display system A display/screen system which is positionable upon a floor and is cooperable with a vertical support surface, such as a wall, includes a sheet of flexible material having an edge and a collapsible frame from which the sheet of material is suspended in a s... | 03/21/2000 |
| 6003275 | Furniture system A furniture system is particularly adapted to support group activities in open plans, and the like. A plurality of columns support an overhead framework on the floor of a building in a freestanding fashion at a predetermined elevation, generally above ave... | 12/21/1999 |
| 5975101 | Collapsible sunshields, partitions and shade structures having overlapping support loops A collapsible structure is provided that includes at least a first panel, a second panel and a third panel. Each panel includes a flexible loop member that is adapted to assume an expanded position and a collapsed position, and a fabric for substantially ... | 11/02/1999 |
| 5927363 | Prefabricated collapsible awning frame system A prefabricated collapsible awning frame system and method of forming the same. The awning frame system comprises a bracket assembly having a mounting plate that can be fixedly attached to a structure and a support member removably attached to the mountin... | 07/27/1999 |
| 5881525 | Window screen frame A screen frame formed from a metal sheet in a single unit folds and locks on V-cuts in a tube by a locking mechanism that is configured to engage in crossed directions by the folding.... | 03/16/1999 |
| 5797223 | Screen door frame member connection system An improved screen door frame construction is provided in which at least one transverse door frame member is coupled to the screen door frame stiles by means of plastic coupling elements. The plastic coupling elements are inserted into the opposite ends o... | 08/25/1998 |
| 5729926 | Roll-up sign with removable batten A sign includes a frame having plural battens therein. A web is disposed over the frame. The web has opposed, co-extensive sides which form a pocket therebetween. The frame is located inside the pocket of the web. A support for the sign is provided which ... | 03/24/1998 |
| 5724778 | Furniture system A furniture system is particularly adapted to support group activities in open plans, and the like. A plurality of columns support an overhead framework on the floor of a building in a freestanding fashion at a predetermined elevation, generally above ave... | 03/10/1998 |
| 5657809 | Security gate A security device for obstructing movement of children or animals through an entryway includes a barrier mounted on a frame. The frame is made of substantially linear and rigid bars which are pivoted together to form one collapsible parallelogram which ex... | 08/19/1997 |
| 5620040 | Foldable cargo cover A foldable cargo cover comprising a pliable sheet having a plurality of elongate stiffener members attached thereto at selected locations thereon. The stiffener members are of sufficient rigidity to maintain the sheet in a substantially planar configurati... | 04/15/1997 |
| 5553648 | Portable wall system A portable wall component is disclosed. The wall component comprises a pair of vertical posts. Each post has an upper component and a lower component with a hollow aperture extending therethrough. Each post also has a downwardly extending smaller cylindri... | 09/10/1996 |
| 5526866 | Tonneau cover fastening system A tonneau cover for covering an opening in a structure, the opening having a periphery, the structure having a front shelf, side rails, and an end gate, and the cover including a fastening system for securing a frame to a flexible fabric web, the improvem... | 06/18/1996 |
