Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7241961 | TIG welding method A TIG welding method of welding a first part with a first wall and an end edge to a second part with a second wall and an edge along a junction surface between said edges and along which the first wall forms a salient angle with the second wall. The TIG welding elec... | 07/10/2007 |
| 7067768 | Motor driven resistance spot welding gun A motor-driven welding gun has a servomotor for displacing a movable electrode tip toward and away from a fixed electrode tip. The servomotor has a motor housing with a copper pipe which is inserted therein when the motor housing is cast. The copper pipe provides a ... | 06/27/2006 |
| 6822205 | Method for producing multilayer metal composite tubes A process for the production of multi-layer metal composite tubes (10), wherein a metal strip is shaped to form a tube (16) and butt-welded along its two longitudinal edges. A plastic inner layer (12) is applied by extrusion in firmly adhering m... | 11/23/2004 |
| 6703093 | Friction welding In one aspect the invention provides a friction welded component, and a method of manufacture for such a component, comprising a pair of upstanding tubular members (6,8) which are friction welded at their respective end cross-sections, in coaxial concentr... | 03/09/2004 |
| 6627840 | Method and means for processing butt welds A method and machine for deburring the burr which is formed when wires are butt welded is disclosed. The machine comprises a deburring head which has a pair of opposed deburring rollers mounted thereon. Each of the rollers has a milled surface formed ther... | 09/30/2003 |
| 6346684 | Welding material assembly and method A welding material assembly is constructed and arranged to position a welding material in electrically conductive relation between exterior surface portions of first and second weldable members at a location where the first and second weldable members are... | 02/12/2002 |
| 6325366 | Tube clamping assembly A tube clamping assembly comprising a first portion having a base and a clamping device carried on the base, and a second portion having a base and a clamping device carried on the base. The first and second portions are coupled to each other such that th... | 12/04/2001 |
| 6066823 | Semiautomatic tube welding apparatus The present invention relates generally to an apparatus and method for performing tube-to-tubesheet welding within box headers and, in more particular, to a GTAW welding gun that has a long generally tubular barrel which is small enough in diameter to pas... | 05/23/2000 |
| 5920032 | Continuous power/signal conductor and cover for downhole use Conductors are placed in insulator which acts as a spacer/centralizer for the conductors, which are in turn mounted within tubing. The void spaces between the insulator and the tubing inside wall can be filled with a sealing material. Alternatively, the v... | 07/06/1999 |
| 5904864 | Robotic welding A robotic welding method for making a heat exchanger having tubes and inlet and outlet headers is disclosed. The headers have planar tubesheets and covers. The planar tubesheets are welded to the inlet and outlet ends of tubes. The tubesheets have two co-... | 05/18/1999 |
| 5849116 | Production method for steel material and steel pipe having excellent corrosion resistance and weldability A steel material and a steel pipe each exhibiting an excellent corrosion resistance in an environment containing a wet carbon dioxide and a small amount of hydrogen sulfide are produced at low cost and with high productivity, a steel slab which contains, ... | 12/15/1998 |
| 5501389 | Titanium tube seal welding head enclosure An arrangement for providing a seal fillet weld on a titanium tube sheet and tube includes an enclosure having a closed top and an open bottom opposite the top. The enclosure is positioned over the tubes to be welded on the tube sheet. A rotating seal wel... | 03/26/1996 |
| 5486670 | Pilot probe for orbital welding apparatus An orbital type welding apparatus adapted for use in welding tubes into a tubesheet by an inert gas electric arc welding process. The welding apparatus includes a housing, a rotor rotatably mounted within the housing, and a pilot probe unit extending from... | 01/23/1996 |
| 5370296 | Apparatus for forming circular weld joints An apparatus for forming circular weld joints includes a support frame, a motor having a primary drive shaft, a secondary drive shaft coupled to the primary drive shaft, and a hub mounting plate affixed to the support frame. A floating hub assembly is inc... | 12/06/1994 |
| 5239154 | Welding apparatus Pipe-welding apparatus with a centering device for centering the pipe-welding apparatus relative to a pipe which is to be welded to an end-plate. The centering device is provided with a tubular center part which supports two pairs of sleeves arranged axia... | 08/24/1993 |
| 5221818 | Box header welding method and apparatus A method and apparatus for welding tubes to a tube sheet uses a gas tungsten arc welding (GTAW) torch assembly that is small enough to be inserted through small access holes in a box header. The welding torch is carried near the end of a rotating mandrel ... | 06/22/1993 |
| 5055654 | Mast assembly for rotary tool A tool having a rotating mast assembly 12 is provided which includes a hollow conductive gas transmitting electrode 14 and a non-hygroscopic ceramic shielding tube 12 which is made of at least 94% by weight Al2 O3 and has a tensile s... | 10/08/1991 |
| 4975554 | Rotating weld head for tube interiors A welding apparatus (10) for longitudinally traversing and circumferentially welding within the interior of a tube. A rotating weld tip and gas supplying containing head is mounted on and rotationally driven by a rotor tube (36) extending from the end (90... | 12/04/1990 |
| 4965431 | Sweep welding method and apparatus therefor A method and apparatus for welding a tube to a tube plate such as in a vehicular radiator core are provided wherein a tube end formed by a tube end sidewall protrudes through an aperture in the plate to provide a joint for welding the sidewall to the plat... | 10/23/1990 |
| 4943001 | Tube-type vessel having crevice-free joints and method for manufacturing the same A tube-type heat exchanger has two tubesheets, each provided with a multitude of bores, and tubes which extend between the tubesheets at their bores, their hollow interiors opening into the bores. Each tube at its ends is joined to the tubesheets along fi... | 07/24/1990 |
| 4942280 | Device for welding the end of a tubular piece fastened inside a bore opening onto a face of a plate, such as a tube plate of a steam generator The welding device including an adjustable connecting assembly includes a fastening mechanism (12), having a cylindrical part (12a) to be introduced into a tube (6) of a network, and a jack (12b) for actuating the cylindrical part (12a), and a welding hea... | 07/17/1990 |
| 4845330 | Rotary-electrode inert-gas arc welding machine The outer shell of the linking housing (7) of the welding machine consists of a first casing (7a) and a second casing (7b), assembled together through a flat surface (44). The electrode support (10) is mounted to move in rotation in a bearing (30) fixed i... | 07/04/1989 |
| 4843213 | Welding and/or cutting machine A welding and/or cutting machine 1 is provided for use on a workpiece 2 formed by a pair of metal sheets 3 in face to face contact. The machine comprises a movable carriage 4 mounted on a pair of drive rollers 5 operable to grip the sheets 3 of the workpi... | 06/27/1989 |
| 4841118 | Orbital weld head tool An orbital weld head tool (10) has an orbiting and reciprocating carriage (22) for movement around a mandrel (12) fixed to a workpiece. Reciprocation is by a ball nut and screw drive means (70,74) driven by an arc voltage controlled motor (64). Rotation o... | 06/20/1989 |
| 4821943 | Device for welding inside a tube of small diameter The drive mechanism for driving the welding head (17) in rotation in the tube is arranged in a motor casing (18) inserted between first and second sections (16a, 16b) of a flexible tubing. The translational movements of the welding head (17) for positioni... | 04/18/1989 |
| 4798928 | Apparatus for tack welding a tube to a tubesheet Welding apparatus for positioning a tube with respect to a tubesheet and then tack welding the tube to the tubesheet. The welding apparatus has a pilot which can be positioned within the tube and then expanded so that when the pilot is moved the tube can ... | 01/17/1989 |
| 4604512 | Heat exchanger tube repair In the repair of a leaking heat exchanger tube (10) with a repair tube (11) at a braze (12), strain in the exchanger tube (10) is relieved during the brazing operation. Where the exchanger tube is of U-shape both legs (10A and 10B) are treated similarly. ... | 08/05/1986 |
| 4571475 | Internal bore welding torch having removable flexible wand for remote welding An internal bore welding torch assembly and method for use in making remote arc welds inside metal tubes. The torch assembly includes a torch body unit of plastic electrical insulating material, to which is connected the necessary welding services of cool... | 02/18/1986 |
| 4559436 | Heat exchanger tube repair Prior to effecting a repair of a leaking heat exchanger tube by an internal repair tube brazed to the leaking tube, strain in the leaking tube is measured while heating it to brazing temperature. A braze is only effected if the strain is below a predeterm... | 12/17/1985 |
| 4556774 | Welding apparatus for welding tubes to the back face of a tube sheet A tube sheet welding apparatus for the rear or back face of a tube sheet. The welding head apparatus includes a welding head housing with an internal opening therethrough. The particular tube to be welded is to be located through the internal opening. The... | 12/03/1985 |
| 4554429 | Cylindrical tube welding assembly The welding head assembly for welding together a pair of cylindrical tubes wherein one of the tubes protrude along with a mass of other similar tubes from a tube sheet. To precisely locate the welding head position at an exact position for each and every ... | 11/19/1985 |
| 4535214 | Method and apparatus for joining a tube to a tubesheet In order to join a tube to a tubesheet of a heat exchanger, the end of the tube is inserted into a socket at the end of a hole that passes through the tubesheet. The socket is large enough to receive the tube, but the hole is not, so the tube bottoms out ... | 08/13/1985 |
| 4525620 | Method of welding ferritic and austenitic stainless steels and product thereof A method of welding ferritic stainless steel to austenitic stainless steel to form a corrosion-resistant welded article having a stabilized weld joint is provided. The ferritic steel contains 17 to 35% chromium and a total carbon and nitrogen less than th... | 06/25/1985 |
| 4514614 | Pressure-differential method for sleeve-to-tube joining The pressure-differential method for sleeve-to-tube joining comprises inserting a sleeve within a tube and joining the sleeve to the tube. An internal heating device is then inserted into the sleeve for bonding the sleeve to the tube. The portion of the s... | 04/30/1985 |
| 4510372 | Sleeve-to-tube welder A welding apparatus for internally welding sleeves to tubes comprises a central shaft with an electrode attached thereto which are capable of being inserted in a tubular member. A plurality of remotely actuable seals are disposed on the welding apparatus ... | 04/09/1985 |
| 4489470 | Refrigeration apparatus and method of making same A method of securing a tube, such as a condenser tube for a refrigeration cabinet, to the inside of the outer walls of the cabinet by means of direct welding between the tube and the oil panel of the cabinet. The tubing is formed to the desired configurat... | 12/25/1984 |
| 4481399 | Welding of tubes to tube plates Welding of tubes to tube plates using a non-consumable electrode to locally melt the wall of a tube and an adjacent area of the tube plate where the tube has been entered into a hole in the tube plate and including an initial weld preparation comprising t... | 11/06/1984 |
| 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 |
| 4476367 | Front face tube to tube sheet welding apparatus A tube welding apparatus for the front face of a tube sheet. The welding apparatus includes a welding head housing from which protrudes a securing mandrel assembly. The mandrel assembly is to be positioned within the tube that is to be welded. The securin... | 10/09/1984 |
| 4467175 | Adjustment assembly for the rotary torchhead of an electrical welding gun Adjustment assembly for the rotary torch head of an electrical welding gun having a torchholder (4) supporting the welding electrode (3) and a filling wire nozzle (8) at the end of a wire feed tube (9) held in a swivel holder (11) arranged on torchholder ... | 08/21/1984 |
