Class 138/176 - Reinforcement under tension

Subclass of Class 138 - Pipes and tubular conduits
Definition: Device wherein the reinforcement is tensioned to prestress
No. of patents: 33
Last issue date: 12/06/2011

Number	Title	Issue Date
8069880	Pressure cast concrete or mortar lined steel pipes and methods of making the same Pressure cast lined steel pipes comprise an annular concrete or mortar liner along an inside diameter, and a metal shell surrounding the liner, wherein the liner is in direct contact with the metal shell. The wall thickness of the liner can be from 10 to 50 times th...	12/06/2011
7354392	Structurally optimized hollow fiber membranes An elongated hollow microporous fiber comprises an inner wall surface defining an interior fiber lumen, an outer wall surface, and a microporous fiber wall therebetween, the fiber wall having one or more continuous, cohesive, elongated filaments embedded in the fibe...	04/08/2008
7347227	Method of reinforcing a cylindrical pipeline and prefabricated plate used in such method In order to reinforce a cylindrical pipeline, in particular an underground water supply pipeline, prestressing reinforcements are placed and tensioned around it. In a zone where the pipeline has a radial projection, for example providing a manhole for access to the ...	03/25/2008
7174920	Method for repairing pipes The invention concerns a method for repairing a pressurized fluid supply pipeline (1) comprising a series of buried prestressed concrete pipe segments (2, 3, 4) which consists in: providing excavations in the trench, beneath suitably set portions (6...	02/13/2007
7131238	Method of testing seismic braces Braces for bracing objects in structures against forces due to earthquakes are tested by subjecting components of the braces for attaching the braces to the object or structure to cyclic loading of approximately 15 cycles. The cyclic forces are applied to different ...	11/07/2006
7056064	Block unit for repairing flow passage facilities and method of repairing flow passage facilities A block unit for repairing flow passage facilities is provided for permitting a desired repair operation. A method of repairing flow passage facilities using the block unit is also provided. The block unit includes an inner plate defining an inner surface, an outer ...	06/06/2006
7044170	Hydraulic cementitious composition with improved bleeding resistance A method of making a grout composition which reduces the amount of bleed water from grout used in bonded post-tensioned concrete applications is provided. The method includes forming the grout composition by combining copolymers with other materials into a hydraulic...	05/16/2006
7017613	Segment for rehabilitating pipe assembly A segment is coupled to additional segments to constitute a rehabilitating pipe for repairing an existing pipe. The segment comprises an inner plate that defines the inner circumferential surface of the rehabilitating pipe and has an opening therein for performing t...	03/28/2006
5186217	Fluid-impervious structure and method of making same A concrete structure is lined with a statically self-supporting glass shell composed of shell segments which are themselves joined together by sealing strips. In a pipe embodiment of the invention, the shell segments form a ring spaced from the concrete b...	02/16/1993
5065795	Prestressed concrete articles A prestressed concrete article including overlying the ends of the article and having gasket rings between the article and the end walls. A hardenable medium is injected between the jacket and the concrete article and generates a sufficient pressure so as...	11/19/1991
4840200	Prestressed tube Disclosed is a prestressed tube and a method of its manufacture. The tube includes inner and outer walls with an intermediate nonadhering lamina layer. A pressure medium is fluidically injected through one of the walls to the interface between the nonadhe...	06/20/1989
4771530	Application of inwardly directed prestressing pressure to concrete members Methods for forming prestressed concrete members wherein a pressure-containing casing is disposed around the outside surface of the concrete member and is spaced therefrom so that a cavity is formed between the casing and the outside surface of the concre...	09/20/1988
4702282	Reinforced conventional concrete pipe having an evenly distributed steel wire reinforcement A plain concrete pipe having an evenly distributed steel wire reinforcement is disclosed, said pipe being suitable for water piping and the like; this pipe being reinforced with a reinforcement constituted by thin wires evenly distributed and arranged in ...	10/27/1987
4661387	Steel materials for use with prestressed concrete A prestressing steel material for use with concrete that is prestressed by posttensioning is disclosed. Said steel material is unbonded from the concrete. The prestressing steel material is composed of a steel member sheathed with a foamed synthetic resin...	04/28/1987
4585036	Distribution elements placed between bindings and the bodies bound thereby For distributing the pressure exerted by a binding cable (2), more especially contained in a sheath (10) with a grease filling, over a tubular body (1), such as a forced duct or a concrete silo, surrounded by this cable, there are inserted between said ca...	04/29/1986
4378032	Slotted concrete pipe Concrete pipe including a hollow tube of concrete with a grid of reinforcing bars embedded therein. A plurality of inserts are embedded in the concrete pipe in between the bars of the grid and have passageways therethrough to form slots between the interi...	03/29/1983
4335169	Slotted concrete pipe Concrete pipe including a hollow tube of concrete with a grid of reinforcing bars embedded therein. A plurality of inserts are embedded in the concrete pipe in between the bars of the grid and have passageways therethrough to form slots between the interi...	06/15/1982
4305449	Method of and apparatus for fabricating filament reinforced metal matrix structures Lightweight filament reinforced composite metal matrix structures is provided. The preferred process for producing tubing comprises wrapping alternate layers of metal and filament material to be molded around a mandrel. The mandrel is removed and in its p...	12/15/1981
4259993	Ceramic-insulated pipe for the transport of hot fluids A ceramic-lined pipe for hot fluids, e.g. gases or liquids from high-tempture nuclear reactors or within such reactors, comprises an outer metal-wall pipe formed internally with a lining of ceramic. The ceramic lining is constituted of a ceramic inner sh...	04/07/1981
4114332	Anchoring system for prestressed concrete pipe Multilayers of high tensile strength wire are wound in tension around a tubular concrete core, and anchored to place the pipe in radial compression. The first layer of wire wrapped around the pipe is secured at its opposite end by a first anchoring system...	09/19/1978
4113823	Method of manufacturing prestressed concrete pipe A method of manufacturing prestressed concrete pipe which comprises arranging a reinforcing cage in a form, casting expansive concrete within the form in such a manner that the reinforcing cage is disposed outwardly of the center of the wall thickness of ...	09/12/1978
4097568	Wall construction We have found that if we add a polyhydric phenolic compound such as resorcinol to monohydric phenolic resin/cement systems, we can shorten the gel time sufficiently to use the systems in producing walls. The walls generally are cylindrical and serve to co...	06/27/1978
4080999	Fiber reinforced sandwich tube The invention relates to a sandwich tube comprising an inner and an outer fiber reinforced layer of thermosetting resin and an intermediate layer therebetween consisting of inorganic filler material coated with thermosetting resin and obtained by spraying...	03/28/1978
4049022	Concrete pipes A pipe of concrete, cement mortar or other cementitious material is formed by an integrally cast cementitious mass which is reinforced with a glass fibre strand or roving forming a substantially helical winding extending around the pipe and incorporated i...	09/20/1977
4044088	Stressed hollow concrete cylinders The production of a moulded stressed concrete pipe in which stressed coated tendons are completely embedded in the finished article. The pipe is moulded in at least one longitudinal segment joined only by helically concentrically positioned tendons. The c...	08/23/1977
4031685	Reinforcing cage construction Tubular wire grid reinforcing cages for concrete pipe or similar structures are constructed from a plurality of prefabricated peripheral segments or cage sections, each section extending the full axial length of the completed cage and defining a portion o...	06/28/1977
3982565	Prestressed concrete pipe A method of manufacturing prestressed concrete pipe which comprises arranging a reinforcing cage in a form, casting expansive concrete within the form in such a manner that the reinforcing cage is disposed outwardly of the center of the wall thickness of ...	09/28/1976
3974012	Apparatus and method for forming tapered tubular shafts An apparatus and method of using same to form tubular tapered shafts particularly adapted for golf clubs, ski poles, fishing rods and the like. The material used in forming the shafts is a thermo-setting resin sheet that has a number of elongate, laterall...	08/10/1976
3964521	Bevel pipe winding method and product In the manufacture of prestressed concrete pipe, wire is wound under tension around the concrete body of the pipe and secured thereto. In accomplishing this the concrete pipe is mounted on a turntable for rotation about the longitudinal axis of the pipe a...	06/22/1976
3964522	Bevel pipe winder In the manufacture of prestressed concrete pipe, wire is wound under tension around the concrete body of the pipe and secured thereto. In accomplishing this the concrete pipe is mounted on a turntable for rotaton about the longitudinal axis of the pipe an...	06/22/1976
3963056	Concrete piles, poles or the like This invention relates to prestressed concrete piles, poles or the like pillers covered with an outer shell of steel pipe on a circumferential surface of a cylinderical prestressed concrete tube or a piller shaped prestressed concrete pole at least one en...	06/15/1976
3957087	Pin and truss cylinder construction A strong modular cylinder is made to a selected length by using rods through rings and spacers to tension the cylinder and helical truss rods to give further strength. The ring configuration provides a large open area which can be compartmented for adapta...	05/18/1976
3933182	System for sealing and heat-insulating a duct containing a hot fluid under pressure A duct for the circulation of a hot fluid under pressure and formed in a cold structure of concrete is lined with rigid heat-insulating material such as pumice concrete. A corrugated lining membrane is applied in close contact with the heat-insulating mat...	01/20/1976

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Class 138/176 - Reinforcement under tension