Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7350386 | Method and apparatus for making tubes In a method of making a tube, a sheet metal blank is placed in a U-shaped cavity of a lower mold of a shaping tool, and pressed into the cavity by a ram to shape the blank into a U-shaped configuration. In a next process step, the U-shaped blank is formed between an... | 04/01/2008 |
| 7181821 | Joining expandable tubulars A method of joining expandable tubulars includes joining the tubulars by forge welding and flushing a reducing flushing gas around the heated tubular ends during at least part of the forge welding operation such that oxides are removed from the forge welded tubular ... | 02/27/2007 |
| 7066375 | Aluminum coating for the corrosion protection of welds A method for coating and an associated assembly including such a coating are provided. The assembly includes a workpiece defining a weld portion, such as a friction weld joint and a heat affected zone. A coating is disposed on the weld portion to at least partially ... | 06/27/2006 |
| 7032312 | Catalytic converter and method for manufacture thereof A system and method for the manufacture of a laser-welded cone-shell catalytic converter (100) is provided. An unformed shell blank (111) is formed into a cylindroid shell (110) having overlapping edges (112), which are then resistance we... | 04/25/2006 |
| 6635843 | Strip connecting apparatus and method therefore To provide a strip connecting apparatus and a method therefor which are less costly, short in welding time and high in welding quality. A strip connecting apparatus is provided with: a surface coating removing device for removing insulative surface coatin... | 10/21/2003 |
| 6572003 | Seam welding apparatus and seam welding method To provide a seam welding apparatus and a seam welding method that may operate at a low pressure to obtain a suitable overlapped alignment amount. In the seam welding apparatus, a trailing plate clamp moving means is provided with link mechanisms for over... | 06/03/2003 |
| 6396023 | Airtight sealing method and airtight sealing apparatus for semiconductor laser element The present invention provides a method for hermetically sealing a semiconductor laser element, by which the cleanness of a package can be maintained extremely satisfactorily in a stabilized state, in order to prevent organic substances from being adhered... | 05/28/2002 |
| 6188039 | Projection welded panel spacer and method for making the same A method for making a spacer assembly comprises: forming a plurality of projections along an edge of a portion of sheet metal; roll forming the portion of sheet metal into a tubular configuration; positioning the roll formed portion of sheet metal and a m... | 02/13/2001 |
| 6060682 | Overlapping joint for laser welding of tailored blanks A joint is formed between adjacent edges of a pair of weldable components by forming an undercut on one of the edges. The other edge abuts the undercut so that a portion of the one edge overlaps the other. The edges are laser welded by impinging a beam on... | 05/09/2000 |
| 5916457 | Material to be welded for butt welding, methods of cutting as well as welding the same, and a wire To provide a material to be welded for butt welding which can reduce contamination of particles into a welded portion after the welding is executed and which can construct piping or a device each enabling realization with high repeatability a ultra-clean ... | 06/29/1999 |
| 5880425 | Method and apparatus for joining metals The present invention discloses methods and apparatus for joining of two workpieces. The present invention includes special preparation of the joining ends of the two workpieces to be joined. Methods of the present invention include delivering a high curr... | 03/09/1999 |
| 5780802 | Process for machining and butt-welding at least one edge of a sheet metal plate The invention relates to a process of butt-welding together sheet metal plates, in particular those having different sheet metal thicknesses, by means of an edge preparation that mills the edges of the sheet metal plates while they are clamped in a sheet ... | 07/14/1998 |
| 5721413 | Method for heating closely spaced portions of two pipes A method for heating pipes with closely spaced end portions that are to be joined by forge welding or the like. Two diametrically opposed contacts are attached to each end portion for supplying high frequency alternating current for resistance heating of ... | 02/24/1998 |
| 5698118 | Flash welding apparatus A flash welding machine is capable of cutting ends of a pair of preceding and following weld members 1, 2 by means of a shear device 26, 27 and then flash welding them with each other. The flash welding machine can coat an appropriate amount of combustibl... | 12/16/1997 |
| 5601736 | Butt welding process using high density energy beam First, welding protrusions of two aluminum alloy plates are butted against each other, and an engagement projection of one of the aluminum alloy plates is brought into engagement with an engagement recess of the other aluminum alloy plate, thereby maintai... | 02/11/1997 |
| 5343010 | Process for seam welding of sheet metal blanks As preparation for the seam welding of different thickness sheet metal blanks (10 and 12), at least the thicker (10) of the two blanks is reduced in thickness, preferably by chip machining, in its edge region (11) which is intended for welding. Since the ... | 08/30/1994 |
| 5260541 | Crop shear apparatus and crop shear equipment In a crop shear apparatus disposed in a conveyance passage in which band steel is conveyed from a first rolling mill to a second rolling mill of hot rolling equipment, the crop shear apparatus including: at least one shear blade for shearing the band stee... | 11/09/1993 |
| 5183989 | Reduced heat input keyhole welding through improved joint design An improved high energy density welding method for reducing input keyhole welding prepares the weld joint (8) between two edges (10, 14) of at least one member by separating the edges (10, 14) of the member (12, 16) with a controllable gap (22) by a proje... | 02/02/1993 |
| 5147483 | Implantable infusion device and method of manufacture thereof An improved infusion device is of the type which can be implanted for drug delivery within a patient's body, and supplied with infusate without the need for surgical removal. The infusion device has a housing forming a chamber and an entry port into the c... | 09/15/1992 |
| 5030313 | Apparatus for connecting strips An apparatus for connecting strips, in which a rear end portion of a preceding strip and a front end portion of a succeeding strip are cut and brought into contact to each other so that a butt welding of the contacted portions may be carried out to connec... | 07/09/1991 |
| 5022581 | Welding parts having different thermal expansions The thermal expansion of parts to be welded to each other is reduced in that one or more of the parts are modified to include expansion slots in the welding area. This limits thermal expansion to the remaining small areas only which are allowed to expand ... | 06/11/1991 |
| 4736084 | Method and apparatus for heating opposing surfaces of two elements to be joined In a method for heating metal elements (1,2) which are to be joined, for example by forge welding, there is used a high frequency resistance heating. The elements are provided with surfaces to be welded and are positioned so that said surfaces constituted... | 04/05/1988 |
| 4672165 | Welding apparatus A welding apparatus for welding a trailing end of a preceding strip and a leading end of a subsequent strip including a shear device for cutting them in parallel and a back bar device for supporting the ends of the strips. Provision is made to detachably ... | 06/09/1987 |
| 4654500 | Underwater arc welding Portable welding apparatus for use in underwater arc welding comprising a housing through whose wall extends a welding gun. The housing has an aperture for fitment over an item to be welded to a structure and the housing has a gas inlet for evacuation of ... | 03/31/1987 |
| 4650954 | Process for the butt-welding of especially deep-drawable steel sheets or steel strips galvanized at least on one side A process for the butt-welding of especially deep-drawable steel sheets or steel strips galvanized at least on one side, in which the welding seam is protected against corrosion. To obtain a welding seam flush with the sheet and protected against corrosio... | 03/17/1987 |
| 4626655 | Method and apparatus for welding rolled bands of finite lengths to form continuous bands during a manufacturing operation The average winding diameter of a finite roller band length wound on a supply coil is increased by having the roller band rewound from the supply coil to a storage coil of a larger than the winding diameter, which encloses the supply coil concentrically. ... | 12/02/1986 |
| 4479043 | Controlling the zone of longitudinally seam-welding split tubes The h.f.-heated edges of a split tube are prepared prior to heating by means of contour-rolling the edges in order to obtain a convex contour in which the temperature is isothermically distributed, parallel to the convex edges.... | 10/23/1984 |
| 4476370 | Method and apparatus for shaping beads of welded steel section In manufacturing steel sections by high-frequency resistance welding, weld beads are produced along the weld line of the material. However, rolls disposed in the neighborhood of the welding end point squeeze the red-hot weld beads into a uniform shape.... | 10/09/1984 |
| 4404458 | Attachment of fork fitting to fork leg A method for attaching a bicycle fork fitting to a fork leg is disclosed, using a particular fork fitting means. A steel pipe is formed with a fork leg including its one closed distal end with a joint. The fitting means is provided with projections at the... | 09/13/1983 |
| 4304977 | Flash welding apparatus In a flash welding apparatus, different length guides and driving devices thereof are formed on lower parts of an inlet side electrode table and an outlet side electrode table and the electrode tables and a compact rotary shear unit are arranged in the di... | 12/08/1981 |
| 4223196 | Welded tubular articles and method for making the same A welded seam between overlapped edges of sheet material wherein the sheet material is heated to a temperature below the melting temperature and is forced together under high pressures to form a forged weld. The thickness of the sheet material in the weld... | 09/16/1980 |
| 4190186 | Preparation of tube for welding Apparatus for preparing two tubes to be welded together at their ends and for placing the ends in opposed, abutting relationship for welding. The apparatus includes means for annealing a portion or length of each tube, and means for stretching the portion... | 02/26/1980 |
| 4179059 | Automatic pipe welding apparatus and method A TIG pipe welding method which employs two sets of machine guide surfaces on the pipe ends. First radially inner guide surfaces cooperate with a sensor coupled to the welding torch to continuously monitor the arc gap between the welding electrode and the... | 12/18/1979 |
| 4151392 | Method of manufacturing electrical connector A method for manufacturing an electrical connector is disclosed in which the connector itself comprises an aluminum barrel member having a first and a second end, with the barrel member having a recess in its first end adapted to receive an electrical cab... | 04/24/1979 |
| 4147913 | Weld gap shears for a flash welding machine A strip flash welder having a guillotine shear unit which is movable from a position out of the strip flow path into a position for shearing strip ends between the main clamping dies of the machine.... | 04/03/1979 |
| 4144439 | Automatic pipe welding apparatus A pair of pipe ends are first prepared prior to welding to provide highly accurate guide surfaces. Secondly, a welding torch carriage arrangement is provided which engages the exterior surfaces of the abutting pipe ends to be welded, which carriage is gui... | 03/13/1979 |
| 4096375 | Flash welding apparatus The present invention discloses a full-automatic flash welding apparatus wherein the trailing edge of the preceding strip and the leading edge of the succeeding strip are automatically accurately positioned, rigidly clamped and simultaneously cut off, the... | 06/20/1978 |
| 4048460 | Method of welding a cover to a container A metal welding gasket secured between a cover and a container to prevent expulsion of weld material into the interior of the device being welded.... | 09/13/1977 |
| 4016394 | Production of longitudinally welded pipe In the production of longitudinally welded pipes, the metal strip is treated with a chemical deoxidizing agent, such as a hydrazine compound, to remove oxides from at least the strip edges, prior to arc welding, to provide an improved weld.... | 04/05/1977 |
| 4015071 | Microelectronic circuit case A microelectronic circuit case for continuous seam welding to a lid and having a chamfer on the inner corner of the case upper edge for improving welding and sealing reliability, and a method of making the case.... | 03/29/1977 |
