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| Number | Title | Issue Date |
| 7757445 | Precast concrete panels for basement walls A basement wall is provided which includes a precast prestressed hollow core concrete panel. The panel has a plurality of horizontally extending voids and a plurality of horizontally extending tension cables. The panel has a lower portion extending below grade. The ... | 07/20/2010 |
| 7621103 | Duct system for profiled post-tension construction A duct system for profiled post-tendon construction has a first duct, a second duct and a third duct joined together in end-to-end relationship. The first and third ducts are of one type of polymeric material. The second duct is of a different type of polymeric mate... | 11/24/2009 |
| 7285001 | Tension-exerted hoop for plastic and rubber articles A tension-exerted hoop for plastic and rubber articles comprises a tension-exerted (lock) hoop made up of a plurality of flexible wires wound into a hoop-shaped configuration wherein the flexible wires are respectively twined and bundled up via multiple thin filamen... | 10/23/2007 |
| 7234280 | Device for anchoring prestressing reinforcements The anchoring device, for anchoring at least two reinforcements for prestressing a civil engineering works structure, has a block through which there pass at least two pairs of anchoring orifices arranged symmetrically on each side of a mid-plane of the block. The t... | 06/26/2007 |
| 7171787 | Rectangular tilt-up concrete tank construction A rectangular tilt-up concrete tank includes a concrete slab with a metal plate anchored thereto, the metal plate defining at least one substantially linear concrete side wall location. A plurality of preformed concrete side panels each having metal plates attached ... | 02/06/2007 |
| 7162844 | Use of partial precast panels for construction of concrete walls and shells A precast panel for building reinforced concrete walls has a metal liner that forms a front surface of the panel. A concrete mass is disposed behind the liner. The panel has reinforcement structure within the concrete mass that can be used to provide continuity of r... | 01/16/2007 |
| 7073305 | Compression ring horizontal bracing system for building structures This invention provides a construction method having at least one compression ring and its bracing and reinforcing tension plane installed at a targeted floor level, where the compression ring and the tension plane form a structural bracing system to protect a new b... | 07/11/2006 |
| 6922956 | Floating cover A floating cover or roof having a plurality of floating panels or panels is provided. The floating cover disposed in a storage tank includes a frame having a plurality of openings, the floating panels mounted into the respective openings, an inspection port formed o... | 08/02/2005 |
| 6505445 | Floating cover A floating cover or roof having a plurality of floating panels or panels is provided. The floating cover disposed in a storage tank includes a frame having a plurality of openings, the floating panels mounted into the respective openings, an inspection po... | 01/14/2003 |
| 6247279 | Retrofitting existing concrete columns by external prestressing A large number of existing reinforced concrete structures, such as buildings and bridges, if subjected to abnormal loads, such as those expected during earthquakes or bomb blast, may experience significant inelasticity in their critical regions. It is eco... | 06/19/2001 |
| 5809710 | Method of tensioning a tension member composed of a plurality of individual elements A method of tensioning parallel prestressing members of a building or building component of prestressed concrete or a tension member composed of a plurality of individual elements, such as steel rods, steel wires or steel strands, wherein the individual e... | 09/22/1998 |
| 5673528 | Safety wall for a building A wall, particularly a wall of a containment for a nuclear plant, a pool or a cavern, includes a bearing wall. A sealing element is disposed on at least one surface of the bearing wall and covers the bearing wall. A protective wall covers the sealing elem... | 10/07/1997 |
| 5590497 | Circular or generally circular prestressed concrete tank and method of constructing same A tank of generally oval configuration created by the use of a plurality of curved, precast concrete panels of uniform size and rectangular configuration. Each panel is constructed utilizing a diaphragm liner either made of corrugated structural material ... | 01/07/1997 |
| 5544460 | Multi-component fluid tank A fluid-tight tank is composed of a plurality of separate components. Each component is preferably formed from cement and provided with an interior region having a circular cross-section. Each component has a plurality of chase ways extending throughout i... | 08/13/1996 |
| 5265750 | Lightweight cylinder construction A modular cylinder comprises a plurality of, in this case 24, modules each having a tongue to engage a groove of its neighbor and each either having a camming ramp to engage a camming ramp of its neighbor, or a filler rod inserted between adjacent modules... | 11/30/1993 |
| 5180253 | Arrangement of prestressing tendons in a pressure tunnel Each of the prestressing tendons (3, 4, 18) in a pressure tunnel is made up of a bundle of monostrands (21) held together. Each of the monostrands (21) of one of the prestressing tendons is distanced from adjacent monostrands by the introduction of spacin... | 01/19/1993 |
| 5150551 | Prestressed composite concrete tank with improved pump joint and method for constructing the same A prestressed composite tank has a vertical wall that extends around a storage area. The wall is made up of a substantially vertical, preferably metallic diaphragm and a layer of shotcrete on one or both sides of the diaphragm. The diaphragm is formed fro... | 09/29/1992 |
| 5134830 | Method and apparatus for constructing circumferentially wrapped prestressed structures utilizing a membrane The present invention is directed to improved tank structures and the processes and apparatus for their construction. The walls of the prestressed tank are formed by inflating a membrane, applying one or more layers of rigidifying material on said membran... | 08/04/1992 |
| 5131201 | Precast concrete panels and support pedestals constructed therefrom A composite elevated storage tank is constructed utilizing precast concrete panels for a pedestal which supports a steel storage tank. The precast concrete panels are poured in a controlled environment not subject to the difficulties inherent with sitecas... | 07/21/1992 |
| 5129413 | Self washing storage tank A self washing water storage tank has a floor, a cylindrical, generally upright, peripheral concrete wall which sits on the floor and extends around and defines a water storage chamber, and a concrete roof that is mounted atop the wall in substantial cove... | 07/14/1992 |
| 5105590 | Apparatus for constructing circumferentially wrapped prestressed structures utilizing a membrane including seismic coupling The present invention is directed to improved tank structures and apparatus for their construction. The walls of the prestressed tank are formed by inflating a membrane, applying one or more layers of rigidifying material outwardly of said membrane and th... | 04/21/1992 |
| 5066167 | Prestressed concrete lining in a pressure tunnel The prestressed concrete lining has several reinforcement elements (32) distributed around the circumference and along the length of the pressure tunnel. There are prestressing elements (38, 39, 40, 41) which encompass at least a part of the circumference... | 11/19/1991 |
| 4843778 | Elongated prestressed concrete tank and method of constructing same A prestressed concrete tank includes a pair of generally parallel, laterally spaced, straight concrete wall sections which are preshrunk by the application of compressive forces. Straight wall sections are constructed on top of a footing covered with a pl... | 07/04/1989 |
| 4835936 | Process for obtaining hollow structures such as conduits, silos or shelters A process for obtaining hollow structures by assembling a plurality of prefabricated, longitudinal elements each corresponding to a portion of the cross-section of the structure on supports intended to prevent friction between the ground and the base of t... | 06/06/1989 |
| 4492065 | Self-arcing tank segments Vertical boards or tank segments are compressed by outer horizontal bands that cause the vertical edges of these tank segments to press together. Each tank segment has a web and edge structures that are thicker than the web measured in a radial direction ... | 01/08/1985 |
| 4473976 | Prestressed cooling tower Disclosed is a structure of flexible tensile members which requires only two arrays of said members for obtaining lateral stiffness of said structure, the ends of each member being attached to contour elements and the members of each array having opposite... | 10/02/1984 |
| 4406102 | Precast concrete silo complex and a method of constructing it A precast concrete silo complex and a method of constructing it, in which quarter-cylindrical precast concrete members, constituting unit members, are each provided with a pair of radially protruding couplings near both the ends of the member, and the uni... | 09/27/1983 |
| 4366658 | Annular three-dimensional structure Annular three-dimensional structure formed by regularly criss-crossed filiform elements, divided in a plurality of families of elements occupying the same place within the structure arranged identically within the said structure. In order to have an undel... | 01/04/1983 |
| 4326363 | Waisted envelope for tubular building structures A waisted envelope for tubular building structures, such as cooling towers, is supported by way of a supporting structure, joined with its top end and responsible for a pulling or pretensioning force, on a system taking up the vertical component of the pu... | 04/27/1982 |
| 4317317 | Liquid storage tank A liquid storage tank of the type which has a base, an annular concrete sidewall seated on the base and free to shift laterally thereon as it shrinks and expands, and a multiplicity of horizontal tension hoops embracing the sidewall is provided with a mul... | 03/02/1982 |
| 4271647 | Prestressed concrete tanks with shear blocks for resisting shearing forces Disclosed is a prestressed concrete tank comprising a foundation having a generally horizontal supporting surface and a wall structure mounted on the supporting surface. The generally horizontal supporting surface is provided with at least two shear block... | 06/09/1981 |
| 4270323 | Concrete tank A prestressed concrete tank with a wall of precast concrete panels surrounded by a cast-in-place beam, the beam and panels being prestressed by metal members in tension, encased within or placed around the outside of the beam.... | 06/02/1981 |
| 4267676 | Earthquake resisting tank and methods of constructing same This application relates to a tank for the storage of liquids, and more specifically to a tank adapted to withstand earthquake conditions and to methods for constructing same. More specifically, this application relates to a cylindrical tank having a side... | 05/19/1981 |
| 4249352 | Earthquake resistant tank A tank adapted to withstand the horizontal displacement forces and overturning moments which act upon the side walls thereof under earthquake conditions is disclosed. The tank includes a base and cylindrical side walls and a plurality of tendons are provi... | 02/10/1981 |
| 4232495 | Precast units for constructing cooling towers and the like A large, thin-shell cooling tower, a method for its erection, and novel precast units. Upon a foundation a series of angularly-extending columns is erected, and the columns are joined at their upper ends by a lower ring. Then a ribbed, waffle-like reinfor... | 11/11/1980 |
| 4207716 | Receptacle having a circumferentially pre-stressed peripheral wall composed of concrete slabs In a large size receptacle, e.g. for a mixture of liquid and solid manure, the peripheral wall comprises a circular series of reinforced concrete slabs having a plain external surface and presenting, at each vertical joint between successive slabs, groove... | 06/17/1980 |
| 4196551 | Sectional tower structure The present invention relates to sectional tower structures for most effective use as supporting structures of tall smoke stacks exceeding 250 m in height. Said structure comprises a reinforced-concrete lattice framework made in the form of an one-sheet h... | 04/08/1980 |
| 4187660 | Method of constructing cooling tower employing precast reinforced concrete panels A method for erecting a large, thin-shell cooling tower. Upon a foundation a series of angularly-extending columns is erected, and the columns are joined at their upper ends by a lower ring. Then a ribbed, waffle-like reinforced concrete wall is construct... | 02/12/1980 |
| 4155207 | Cable-wrapped fiberglass reinforced plastic bin An improved bin is adapted to receive and store materials having fluid properties, such as liquids and granular materials. The bin is made of a fiberglass reinforced plastic material, and has a circular bottom arranged to rest on a foundation, and a cylin... | 05/22/1979 |
| 4142339 | Concrete tank joint A wall-base joint for a concrete tank is constructed by providing in a base a groove larger than the width of a tank wall, placing the wall in the groove to leave a groove portion on each side of the wall, prestressing the wall with a first compressive fo... | 03/06/1979 |
