Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 6158783 | Weldable plug-in coupling for a pressure vessel An improved and cost-effective plug-in coupling for leak-proof attachment of a pressure pipe to a pressure vessel, including a weldable ferrule secured in an opening in the pressure vessel, a plug-in fitting attached to the pressure pipe and having a plug... | 12/12/2000 |
| 5562312 | Discountinuous plane weld apparatus and method for enhancing fatigue and load properties of subterranean well drill pipe immediate the area of securement of pipe sections An apparatus and method are provided for enhancing fatigue and load properties of subterranean well drill pipe immediate the area of securement of pipe sections by providing a weld in a discontinuous plane to secure pipe sections to each other, said weld ... | 10/08/1996 |
| 5403044 | Apparatus for the articulated connection of pipes of an exhaust system The invention proposes a simple and inexpensive apparatus for the articulated connection of pipes of an exhaust system, such as of a motor vehicle, which has pipe sections connected by a flexible line part, such as a bellows, in which resilient elements e... | 04/04/1995 |
| 5386923 | Joint structure of container and pipe A breather pipe mounted to a fuel tank is divided into an outer pipe and an inner pipe, a flange is integrally formed at an end part of the outer pipe on the tank side, then the flange is projection-welded to a wall part of the fuel tank, ensuring a seala... | 02/07/1995 |
| 5362113 | Spot-welded end fitting for flexible metal piping A flexible piping and fitting assembly includes a section of flexible piping formed by spiral-winding a band with interlocking leading and trailing edges. The piping includes a bore. A fitting with a generally cylindrical inner section, an annular band an... | 11/08/1994 |
| 4918292 | Process and machine for the welding together of plastic parts processing a built-in winding The invention relates to the automatic welding of plastic parts possessing a built-in winding. In order to carry out an automatic welding operation without risking damaging the parts by subjecting them to an excessive welding temperature, there are regula... | 04/17/1990 |
| 4776613 | Pipe joint weld collar and method of installation A pipe joint weld collar and method of installation is disclosed for an offshore oil/gas pipeline for covering contiguous end portions of a pair of pipes joined together by a metal weld. A coating of a high specific gravity material, such as concrete or t... | 10/11/1988 |
| 4747430 | Process and apparatus for sleeve repair of pipe line A longitudinally split cylindrical sleeve, consisting of two half shells, is applied to an internally pressurized pipe, to reinforce a section of the pipe wall weakened by an internal or external defect. One pair of adjacent shell ends are first welded to... | 05/31/1988 |
| 4684417 | Process for the control of the welding time of an electrical welded union Two tubes of thermo-plastic material are joined by a sleeve in an inner portion of which there is an electrical resistance coil, the ends of which are connected to terminals projecting from the outer surface of the sleeve. An electrical circuit supplies e... | 08/04/1987 |
| 4684789 | Thermoplastic fitting electric welding method and apparatus A method and apparatus for electrically heat welding a thermoplastic fitting having an electric resistance heating element disposed therein whereby a regulated quantity of electric power is supplied to the heating element during the welding process and th... | 08/04/1987 |
| 4669762 | Dual duct connector A connector to receive the top and bottom member of a duct system.... | 06/02/1987 |
| 4304423 | Apparatus for air conducting duct The device holds the ends of insulating mats against the inside walls of air ducts at the ends of the ducts where frame pieces form external glands on the ducts. The frame piece has a stay which rests on the outside of the air duct wall and a stay which r... | 12/08/1981 |
