Class 29/890.149 - Elbow or L-shaped fitting making

Subclass of Class 29 - Metal working
Definition: Process wherein the manufactured article is an accessory
No. of patents: 37
Last issue date: 08/26/2008

Number	Title	Issue Date
7415765	Flange coupling and manufacturing method for the same An object of the present invention is to provide a flange coupling in which the height of a horizontal portion of an L-shaped pipe is made as small as possible. The present invention provides a flange coupling having a flange formed with an attaching bolt hole and a...	08/26/2008
7360799	Insulation cladding for bends A half elbow used with a second similar half elbow clads insulation or other structures about a bend. Each half elbow is formed of separate segments of thin sheet material fastened together. Each segment includes first and second edges adapted to be fastened to corr...	04/22/2008
7347224	Supply and exhaust pipe In order to provide a supply and exhaust pipe comprising a drop-off prevention mechanism, particularly effective for pipes with a large diameter, to increase bending strength and sealing efficiency, formation of a hemmed section A at an top edge of an insert portion...	03/25/2008
7328510	Elbow rotator An elbow rotator apparatus for rotating an integrally formed section of an elbow workpiece includes a pair of gripping arms which are selectively positionable in a first position displaced from the elbow workpiece, and a second position in which the gripping arms ar...	02/12/2008
7311863	Method for producing glass-like carbon pipe, and glass-like carbon pipe produced by such method A method for producing a glass-like carbon pipe is provided. The method comprises the steps of producing a plurality of thermosetting resin molded articles by centrifugal molding, said molded articles each having the shape of the sections of a pipe divided in the lo...	12/25/2007
7302972	Thermo-insulated flexible tubing A water supply line includes a cylindrical and ductile outer tube that has a centrally aligned axis. An inner tube is concentrically spaced about the axis of the outer tube and has a length coextensively sized therewith. The inner tube is equidistantly spaced inward...	12/04/2007
7254980	Gas supply tube and method of making same A metal gas-feed tube for a head air bag automotive vehicle has a sleeve formed on a bent end thereof to fit onto a connecting fitting of a gas generator. That sleeve is formed in part from an unbent region of the tube by pressing a mandrel into the end of the tube ...	08/14/2007
7171834	External sleeve assisted tube bending A method and apparatus for bending tubes particularly suited for bending thin-walled tubing into a tight radius bend. An external sleeve is used during the bending process which maintains the tube cross sectional area and tube wall thickness, thereby eliminating the...	02/06/2007
7121129	Folded-seam connection, method of producing it and device In ventilation and air-conditioning technology, so-called spiral pipes have to be joined together in a tightly sealed manner at widely differing angles, which is generally carried out by segment bends and pipe sections. An improved, durable seal of folded-seam conne...	10/17/2006
7111487	Apparatus and method for forming curvature in sheet metal A curvature forming device has an upper member and a lower member. A clamping member is mounted on a spring within a recess in the upper member. An elongate deforming member is fixedly mounted in the same recess. The deforming member protrudes out of the recess more...	09/26/2006
7096585	Apparatus and method for automated production of adjustable duct member An apparatus and method for forming a duct member having a plurality of adjustable sections which are rotatable relative to one another. The apparatus and method causes relative rotation between individual sections during the manufacturing process, to form a complet...	08/29/2006
7043634	Detecting malicious alteration of stored computer files When a file is created on a computer, an archive copy of that file is also created and separately stored. Upon a subsequent access to the active copy of that file, a comparison between the active copy and the full archived copy is made to detect any changes. If ther...	05/09/2006
7013697	Method for expanding a tubular blank A method for expanding tubular blanks includes pre-expanding or initially expanding a section of the tube by forcing a punch into an open end of the tube. The punching process may be repeated to achieve up to approximately 50% expansion from the original configurati...	03/21/2006
6832623	Gas meter valve and method Disclosed is a gas meter valve for connection to an outlet of a gas meter and a method for its use. The gas meter valve comprises a valve inlet coupleable to the meter outlet, a valve outlet coupleable to piping for supplying gas to a customer and a valve body coupl...	12/21/2004
6643930	Method and apparatus for producing end flange member for cylindrical duct A method for producing a cylindrical flange for the end of an air duct is produced by compressing a panel by differing amounts to cause the panel to take on an arcuate cylindrical shape....	11/11/2003
6591650	High-pressure bulge-forming apparatus A high-pressure bulge-forming apparatus has a multipart die having a cavity adapted to receive a hollow workpiece and having ends oppositely open along an axis. Respective actuators aligned with the cavity ends have stems extending axially toward the cavi...	07/15/2003
6382679	Meter loop frame assembly A meter loop frame assembly for connecting a gas meter to a gas supply line and a gas service line. The meter loop frame assembly includes a gas inlet conduit, a gas outlet conduit, and a brace. The gas inlet conduit is shaped and oriented such that the g...	05/07/2002
5979202	Method and apparatus for making pipe line steel grooved-end fittings A method for making a grooved-end pipe fitting from standard pipe includes the steps of bending length of pipe on a press mandrel to form a curved pipe segment with an oval cross section and further working the curved pipe segment in a die to produce tang...	11/09/1999
5775736	Plastic pipe fittings A reinforced plastic pipe fitting is made by using interference fit techniques to apply an outer pipe over a straight section of inner pipe. Appropriate sections of the outer pipe are then cutout. After arranging the fitting to the desired shape, faces of...	07/07/1998
5765285	Method of bending a rigid thermoplastic pipe The present invention relates to a method of forming a sharp small radius bend in a rigid thermoplastic pipe having a close fitting metal sleeve without kinking or cracking in the thermoplastic at the bend. Furthermore, the invention comprises a rigid the...	06/16/1998
5625948	Method for producing a pipe and apparatus for the same According to the present invention, in the first process, a pipe end of a long pipe is bent with a radius of curvature which is larger than a minimum radius of curvature to form a large R portion. That is to say, bending with a large radius of curvature (...	05/06/1997
5615481	Method and apparatus for the production of circumferentially compressible pipe fittings To form a pipe fitting (90) having a body (92) formed with at least one outer bulge (93) defining an inner circumferential groove (93a), in which a sealing ring (93b) can be located, so that the fitting, upon circumferential compression, can sealingly eng...	04/01/1997
5473815	Method for producing a connector for fluid pipe elements A kit for producing a non-straight connector for fluid pipe elements comprises loose sleeve couplings and at least one flat blank which has been given such a shape and such dimensions that, after forming thereof and interconnecting its opposite ends, it i...	12/12/1995
5257825	Barb and swivel spout elbow fittings An elbow fitting of selected member configurations and comprised of two members separately machined utilizing bar stock exterior form and one of which is cross drilled for assembly with the other and preferably adapted to rotatably receive a swivel spout ...	11/02/1993
5189790	Method of fabricating a double walled pipe elbow A double walled pipe elbow with an intermediate space between an inner pipe and an outer pipe is formed by joining the ends of a straight inner pipe and a straight outer pipe. The two pipes are bent into a desired shape and then placed in a shaping recess...	03/02/1993
5051076	Two-cylinder-type rotary compressor system having improved suction pipe coupling structure A sealed case has first and second housing portions. A motor section is arranged in the first housing portion of the sealed case and has a rotating shaft extending in the second housing portion. A compression mechanism section is arranged in the second ho...	09/24/1991
5014424	Method of making a curved pipe A bent pipe is made of a metal strip having one edge in a straight line and the other edge in a curved line by winding it helically. A double fold and a single fold are formed along the straight edge and the curved edge, respectively. Then the metal strip...	05/14/1991
4998337	Method for the permanent mutual connection of already finished metal tubes Method for the permanent mutual connection of the ends of at least two already finished metal tubes (1,2,3), consisting in placing the ends of said tubes in a mould, particularly an injection moulding mould, whereby one tube end or several tube ends is or...	03/12/1991
4991293	Means for providing very small bend radii in the tube-like structures The method disclosed allows the bending of tubular structures with much smaller radius bends than is normally acceptable for the diameter of the tubing section that is being bent. The method is very useful for making various fittings which perform bent ro...	02/12/1991
4694547	One-piece metal covering for insulated pipe bends An improved one-piece metal jacket for insulated pipe elbows, bends and/or turns having a central metal spine spaced apart along which a plurality of opposed pairs of metal fingers extend sufficiently to overlap, longitudinally and traversely forming a we...	09/22/1987
4489585	Production of tubular members The invention provides an arrangement for forming an elbow in a length of pipe comprising two internal die pins each mounted for rotation, as limbs of cranked assemblies, about the same axis, the internal die pins being angled with respect to the axis of ...	12/25/1984
4400863	Method of making a rigid fiberglass duct having an integral bendable elbow A rigid, molded fiberglass duct having an integral bendable elbow comprised of two sections of cured fiberglass securely bonded to a corrugated metal-foil sleeve. The method of manufacturing the rigid bendable duct is by sliding a corrugated metal-foil sl...	08/30/1983
4346740	Pipe elbow insulator and protective jacket therefor An insulator for pipe elbows and other similar fittings, comprises an insulative insert encasing the pipe elbow, and a protective jacket positioned about the insert. The protective jacket includes a pair of legs having inclined interior ends which are spa...	08/31/1982
4106322	Press for pressing pipe fittings A press with crossheads interconnected by vertical pillars, at least one of said crossheads moving relative to the stationary crosshead which carries a sliding table with the lower die, the upper die being secured to the movable crosshead above. The stati...	08/15/1978
4106797	Reinforced fitting construction In forming a reinforced fitting, an inner shell is first formed of alternate layers of glass filaments arranged transversely and parallel to the central axis of the tubular fitting portion of which comprising a part; the filaments are embedded in a matrix...	08/15/1978
3979809	Pipe elbow and method of making same The present pipe elbow includes at least two straight pipe sections joined together along a Y-seam, for example by welding. The Y-configuration of the seam is such, that the three limbs thereof all have the same length, whereby these limbs meet at a point...	09/14/1976
3977706	Pipe elbow A pipe elbow or bend has a pair of adjacent straight pipe sections joined together on one side of a center line of each pipe section, and a wedge shaped insert of a segment of pipe of the same diameter joining the straight pipe sections on the other side ...	08/31/1976

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Class 29/890.149 - Elbow or L-shaped fitting making