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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 8096730 | Apparatus for laying concrete metal pipes inverts and method for using the same An apparatus and method for repairing failed metal pipe inverts includes an apparatus for distributing concrete that is positioned at one entrance of the metal pipe invert. The apparatus includes a frame having a forward end and a rearward end. A trough is connected... | 01/17/2012 |
| 7559720 | Culvert bundle for stream crossings and flow-through bridge abutments A culvert bundle and fill assembly for stream crossings and flow-through bridge abutments comprising: (a) a first separator fabric; (b) a plurality of culverts placed on the fabric adjacent to one another along their lengths; (c) a plurality of triangular cross-sect... | 07/14/2009 |
| 7305798 | Composite overfilled arch system An overfilled arch bridge system includes a composite arch which has a precast layer and a cast-in-place layer. The system further includes means for reducing bending moments within the overfilled arch. The means include customizing the arch end geometry and prestre... | 12/11/2007 |
| 7270502 | Stabilized earth structure reinforcing elements A stabilizing element in a stabilized material particle structure, particularly an earthen embankment, wherein the material stabilizing elements that are inextensible (material with a higher modulus of elasticity than that of the surrounding particles) in compositio... | 09/18/2007 |
| 7217064 | Reinforcement of arch type structure with beveled/skewed ends A method for controlling deformation of a cut end region of an erected arch-type structure for use in underpass construction and the like where the cut end region has at least one extended leg portion. The method comprises building progressively at least one layer o... | 05/15/2007 |
| 7160058 | Methods and module for an underground assembly for storm water retention or detention Methods and modules for use in a modular assembly are disclosed for retaining or detaining storm water beneath a ground surface. A module comprises a substantially horizontally disposed deck portion and at least one substantially vertically disposed side portion ext... | 01/09/2007 |
| 7137756 | Fluid-tight bell-and-spigot-joint for box culverts A box culvert and gasket assembly is provided that enables fluid-tight bell-and spigot joints to be formed between abutting ends of box culverts. The joints according to the assembly of the present invention can remain fluid-tight up to at least 13 psi of water pres... | 11/21/2006 |
| 7080956 | Open bottom box culvert This invention relates to a novel design of an open bottom box culvert which can be used to enable roads, highways and other infrastructure to cross streams without infringing on the wetted perimeter of a stream or interrupting the stream gradient. More particularly... | 07/25/2006 |
| 7052209 | Corrugated stormwater chamber An arch shape cross section chamber for receiving and dispersing stormwater when buried beneath the surface of the earth is corrugated and has a cross section geometry which is a continuous curve. Preferably, the curve is a truncated semi-ellipse. A chamber also has... | 05/30/2006 |
| 6986222 | Planting receptacle assembly and a method for planting A planting assembly (10) including a flexible trough member (12) which may selectively form a plurality of members which may be then selectively interconnected in any desired manner. ... | 01/17/2006 |
| 6962465 | Method for improving the environment within soil embedded culvert and bridge systems The environment and growth of vegetation within a soil embedded culvert system is improved by directing artificial or natural light onto the vegetation within the enclosed passage defined by the culvert system. The light is produced either by internal electrical gro... | 11/08/2005 |
| 6952900 | Covering structure for swimming pools The invention pertains to a covering structure for covering swimming pools, including several pairs of parallel arches that serve to support flexible panels, the arches being made from a curved profile having lateral walls delimiting a series of parallel guide groov... | 10/11/2005 |
| 6951438 | Erosion control transition mat An erosion control transition mat for reducing scour and destructive erosion at the transition between hard armor and soft armor erosion control surfaces. The erosion control transition mat is provided with a riser and a plurality of voids which collect to slow and ... | 10/04/2005 |
| 6945002 | Reinforcement for prefabricated concrete panels with improved bonding to concrete A reinforcement for prefabricated concrete panels with improved bonding with concrete, which comprises profiles to be embedded in a concrete body of a panel. At least some of the profiles have perforations and undulations which are suitable to increase the bonding b... | 09/20/2005 |
| 6922950 | Top arch overfilled system An earth overfilled arched structure includes a shallow arch spanning a clear space. The sides of the clear space are formed by curved or straight walls. Solidified zones of earth material (backfill or in situ) against the springs of the arch and/or behind the walls... | 08/02/2005 |
| 6901708 | Building system A small building assembled using a building system includes a plurality of elongated building elements each having a roof portion and two opposed sidewall portions extending longitudinally from opposite sides of the roof portion. The roof portion and sidewall portio... | 06/07/2005 |
| 6874974 | Reinforced soil arch This invention relates to a novel design of reinforced soil arch which can be used to construct bridges, overpasses, snowsheds, landslide or rock fall protection structures, and the like. More particularly, this invention pertains to an innovative use of mineral soi... | 04/05/2005 |
| 6854928 | Precast concrete culvert system A three piece concrete culvert system includes a set of horizontally spaced precast side wall sections having inwardly projecting and opposing steps or surfaces which support opposite ends of a precast arched top wall section. The side wall sections include extensio... | 02/15/2005 |
| 6854925 | Storm water reservoir with low drag A system using pre-molded polyethylene galleries, utilized for septic or storm water applications, to facilitate rapid and even distribution of effluent and particles across the gallery installation when utilized as a septic system, or minimizes the resistance to st... | 02/15/2005 |
| 6764250 | Method of load reduction on buried culvert using EPS block and/or geosynthetics A method of load reduction on buried culvert using an EPS block is disclosed. A culvert foundation is constructed at a place where a culvert will be buried, and the culvert is put on the foundation, and then, both sides of the culvert are banked with filling earth. ... | 07/20/2004 |
| 6736570 | Precast safety end and form therefor A precast safety end for use with culverts on highway, driveway, and road drainage crossings has a base having a depending flange at its outer end and an upright wall at its inner end, and opening in the wall to register with the opening in an abutting pipe culvert.... | 05/18/2004 |
| 6719492 | Top arch overfilled system An earth overfilled arched structure includes a shallow arch spanning a clear space. The sides of the clear space are formed by curved or straight walls. Solidified zones of earth material (backfill or in situ) against the springs of the arch and/or behind the walls... | 04/13/2004 |
| 6652187 | Portable cofferdam and method for stabilizing the structural integrity of box culvert bridges A portable cofferdam and method for use in stabilizing the subsurface of box culvert structures. The portable cofferdam is inserted inside the tubular section of large box culverts, which are often used as road crossings over streams, creeks and small riv... | 11/25/2003 |
| 6609854 | Structure and method for detecting an inflated state of a flexible membrane dam A structure for detecting an inflated state of a dam formed by a flexible membrane disposed in a conduit, with the detection unaffected by pressure resulting from fluid flow through the conduit when the flexible membrane is not completely inflated. The st... | 08/26/2003 |
| 6575662 | Water quality management system and method A water quality management system and method that controls the exchange of water between two bodies of water (e.g., estuary and ocean) separated by at least one land barrier. The system consists of a series of water exchange units that are disposed in the... | 06/10/2003 |
| 6561732 | Driving pipe and method for the construction of an essentially horizontal pipeline A driving pipe and method for the construction of an essentially horizontal pipeline, whose wall is made at least primarily of concrete polymer. At least sections of the wall of the concrete polymer pipe are made of a liquid-permeable filter material cons... | 05/13/2003 |
| 6533498 | Reinforced composite material A headwall structure constructed of lightweight reinforced composite and incorporating a rigid polymer concrete core in selected portions, for use with standard culvert or drainage pipes in infrastructure water management systems in substitution for conve... | 03/18/2003 |
| 6460213 | Precast concrete structure having light weight encapsulated cores A precast concrete bridge system containing one or more sections wherein each section includes a horizontally disposed, load-bearing span that is integrally cast with a pair of vertical side walls. Each wall contains lightweight cores encapsulated in the ... | 10/08/2002 |
| 6447206 | Beaver control screen for culvert pipe The beaver control screen has a cone-shaped screen having a base, an apex and a horizontal axis. A first set of spaced-apart rods extends from the base to the apex and are disposed in a first conical layer. A second set of rods is disposed in a second con... | 09/10/2002 |
| 6394700 | Highway underdrain plastic apron endwall with anti-floatation wings A plastic apron endwall is connected to a drain which extends under a highway. The apron endwall is in the form of an upwardly opening trough having a general wedge shape and incorporates lateral wings which extend outwardly from the sides of the apron en... | 05/28/2002 |
| 6338595 | Storm water control header for culverts A storm-water control header for a culvert has a vertical head-wall with a thimble on the downstream side, and an adjustable inlet control device including a weir on the upstream side. The thimble is positioned within the culvert, and passes water from th... | 01/15/2002 |
| 6205605 | Method of construction of a vault, bearing piece and half-shell for construction of the vault Method of construction of a vault, in which at least two half-shells (1-8; 60) are brought to bear against one another by means of at least two bearing pieces (30, 50; 70) which are mated and, each half-shell (1-8; 60) comprising an upper edge (21; 61) an... | 03/27/2001 |
| 6203245 | Culvert end guard A culvert end guard for use in surrounding and protecting an exterior end portion of a culvert and which is assembled from first and second like half shell sections is disclosed. Each half shell is T-shaped in configuration and includes a central limb por... | 03/20/2001 |
| 6161342 | Prefabricated concrete element for building a civil engineering structure having an arched wall A civil engineering structure having an arched wall including a plurality of curve shaped elements. Each element bears against one or more other similar elements and has a recess arranged in an outer face for casting a concrete assembly capping piece and ... | 12/19/2000 |
| 6076993 | Leaching chamber A leaching chamber for burial in the ground includes biased ends which permit a series of chambers to arch clockwise or counterclockwise or to continue straight to form a leaching field. Each chamber is identical to every other chamber and includes identi... | 06/20/2000 |
| 6050746 | Underground reinforced soil/metal structures A method for controlling deformation of an erected structural metal plate culvert or underpass during backfilling of the erected structure comprises: building progressively a reinforced earth retaining system on each side of the erected structure by alter... | 04/18/2000 |
| 5980156 | Tunnel liner building method and building panels therefor Tunnel liners are formed from panels of arched sheet material. The panels include a central portion, inclined side portions and wing portions. One of the wing portions has a hook portion and the other of the wing portions has a receptacle portion. The hoo... | 11/09/1999 |
| 5839844 | Leaching chamber endplate The endplate of an arch shape cross section leaching chamber for dispersing liquid in soil has an inlet duct which enables the pipe delivering liquid to the chamber to be at higher elevation than the top of the chamber. Liquid flowing from the duct is gui... | 11/24/1998 |
| 5836717 | Multi-segment spandrel wall for overfilled arch structures An overfilled arch structure includes a spandrel wall that is formed of a plurality of separate segments, each of which is monolithic. The arch structure includes an arch end element having a curb thereon at one end edge, and the segments of the spandrel ... | 11/17/1998 |
| 5720577 | Box culvert A box culvert formed from a plurality of corrugated sections. Reinforcing ribs are secured to the outside surface of the culvert. A universal receiving channel is provided for each lower edge of the culvert and may be used to secure lower edge portions ex... | 02/24/1998 |
