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| Number | Title | Issue Date |
| 6588416 | Radiant device with gas burner and recirculation, adapted in view of reduced production of nitrogen oxides The invention relates to a radiant device with a burner of the "glove finger" type, comprising an exchanger (3) for heating air (T1) by the burned gases (T2), a furnace tube (6) drilled with air-intake orifices (60) and terminated by a nozzle (61) dispose... | 07/08/2003 |
| 6434776 | Tube scraping device The invention concerns a manual scraping device (10) by rotation about the external surface of a tube (112) of plastics material, comprising an annular structure (11) having a passage (20) which is to receive the tube in order to guide it and a blade (30)... | 08/20/2002 |
| 6410878 | Method for producing a flame support The invention concerns a method for producing a flame support for a gas burner, which consists in producing disjointed metal fibres (10) in an alloy comprising iron, chromium and aluminium; assembling the fibres together under pressure; bringing the fibre... | 06/25/2002 |
| 6050351 | Drilling hole system for horizontal boreholes A drilled hole (1) is produced by means of a drilling rod assembly comprig a succession of rod elements (7d) to be arranged end to end. For this purpose, a vertical shaft (2) is produced in the ground, of constant horizontal section and preferably insuff... | 04/18/2000 |
| 5960781 | Oven equipped with a movable heat generating means An oven, including an inner compartment comprising side walls, a lower wall, an upper wall and a back, an outer compartment defining a casing and surrounding the inner compartment in order to delimit therewith a continuous intermediate space, a heat gener... | 10/05/1999 |
| 5620625 | Method of butt-welding two plastic parts with an identifying code, using an automatically controlled electro-welding machine The invention is concerned with a method of butt-welding two plastic parts each equipped with an identifying code, using an automatically controlled electro-welding machine. A device for performing a welding program is associated with said machine, said p... | 04/15/1997 |
| 5613373 | Process and apparatus for cooling a fluid especially for liquifying natural gas In this process, which incorporates an integral cascade, the coolant mixture issuing from the penultimate stage (1B) of the compressor cycle (1) is delivered to a distillation apparatus (5) the head vapor of which is cooled (in 24) to a temperature signif... | 03/25/1997 |
| 5535594 | Process and apparatus for cooling a fluid especially for liquifying natural gas In this process, which incorporates an integral cascade, the coolant mixture issuing from the penultimate stage (1B) of the compressor cycle (1) is delivered to a distillation apparatus (5) the head vapor of which is cooled (in 24) to a temperature signif... | 07/16/1996 |
| 5318678 | Method and apparatus for analyzing the state of protection against corrosion of a work under cathodic protection A study is made of the changeover time of the voltage between an electrode and a metal work piece buried in the ground and protected against corrosion by an electric current. For this study, it is intended momentarily to interrupt the circulation of the p... | 06/07/1994 |
| 5138136 | Method, circuit and apparatus for supplying an electrical current to a resistive heating element The invention relates to a system for processing an electrical power supply signal for a resistive heating element. The circuit provided comprises an a.c. current source, a rectifier and a chopper for supplying the resistive element with a current having two ... | 08/11/1992 |
| 4963290 | Corrosion inhibitors of steels and aqueous compositions of alkali meal halide containing them This invention relates to corrosion inhibitors of steels, particularly carbon steels or low-alloy steels. They are ternary mixtures with synergetic action containing at least one strong base, at least one molybdate and at least one phosphate. This inventi... | 10/16/1990 |
