Patents Assigned to L'Exploitation Des
  • Process for pre-concentration treatment of food by-prouducts and installation for carrying out same
    Patent number: 4599164
    Abstract: The process valorizes food by-products by a reverse osmosis. The pH is temporarily lowered by the injection of carbon dioxide in the medium containing the food by-product before its pre-concentration by reverse osmosis, preferably in the medium to be treated under low or moderate pressure, at a point at which the velocity of circulation of the liquid medium increases. System for introducing carbon dioxide between the low-moderate pressure pump 4 and the high pressure pump 8 at the entrance of the conical device 7. Application in the pre-concentration by reverse osmosis of food by-products, and in particular the lactoserum.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: July 8, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Michel Charles, Jean-Paul Roulland
  • Device for supplying a pipe with a fluid at a particular pressure from alternative sources
    Patent number: 4597406
    Abstract: An installation for the delivery of a gas of high purity under a constant pressure from either of two vessels each of which is connected to a utilization outlet via a separate supply pipe and a switching system. A switching control system acts on two high-pressure valves, one for each vessel, downstream of which is situated a single pressure regulator which controls the outlet gas pressure. The valves are actuated by an auxiliary low-pressure gas via a pneumatic memory and two detectors measuring the pressure prevailing in the two gas vessels.
    Type: Grant
    Filed: April 10, 1984
    Date of Patent: July 1, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Gerard Loiseau, Maurice Molozay, Michel Rigo
  • Novel substituted heterocyclic amines and methods of preparation thereof
    Patent number: 4594428
    Abstract: The present invention concerns compound useful as intermediates in the preparation of heterocyclic phenoxy amines of the formula ##STR1## wherein Y is hydroxyl or chlorine and R is 1-cyclohexenylmethyl.
    Type: Grant
    Filed: January 7, 1983
    Date of Patent: June 10, 1986
    Assignee: Societe d'Etudes Scientifiques et Industrielles de L'ile-de-France
    Inventors: Michel L. Thominet, Jacqueline F. Franceschini
  • Process and device for manufacturing sheet metal or galvanized steel strip devoid of a pure zinc coating on at least one side
    Patent number: 4594272
    Abstract: The invention relates to a process for manufacturing a strip of hot galvanized sheet steel devoid of a coating of pure Zn or a coating based on Zn on at least one side of the strip, comprising passing the strip continuously in a conventional dipping galvanization bath, wiping by pneumatic means a part of the coating of liquid Zn deposited on the strip, and subjecting at least one side of the strip to a mechanical action for completely eliminating the coating based on zinc which is not alloyed to the iron, by allowing to subsist only a thin iron-zinc alloy layer, said mechanical action on the layer of coating based on zinc which is still liquid being exerted by means of a brush at least the bristles of which are energetically cooled. The invention also provides a cooled brushing device (10) for carrying out the process.
    Type: Grant
    Filed: May 29, 1985
    Date of Patent: June 10, 1986
    Assignee: Union Siderurgique du Nord et de l'Est de la France (USINOR)
    Inventor: Robert Haaser
  • Method and apparatus for the cryogenic stripping of electric cables
    Patent number: 4589203
    Abstract: The cable C to be stripped is wound with non-touching coils and crossed layers of cable onto a drum 6 having a perforated core 10 rotatively mounted in a thermally insulated container 1. By injecting into the container liquid nitrogen under the control of a temperature sensor and by circulating the gases contained in the container through the core of the drum and the cable coils, the whole of the cable is cooled down to a temperature at which the plastics coating and, as the case may be, the outer steel sheath of the cable become brittle. The cable is then unwound and, when it has left the container, it is subjected to various mechanical stresses. The stripped cable is finally wound onto a take-up reel 3. Application in the recovery of scrap in the manufacture of power cables of large diameter and recovery of used electric cables.
    Type: Grant
    Filed: August 7, 1984
    Date of Patent: May 20, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Raymond Le Diouron
  • Plasma welding or cutting torch
    Patent number: 4590354
    Abstract: The plasma torch comprises a hollow torch body whose interior is connected to a source of plasma-producing gas, a hollow electrode lodged inside this body and electrically connected to an electric supply conductor, and a nozzle provided with an orifice for the outlet of the plasma. The feature of the invention is that the torch comprises a detachable annular skirt (4) which is assembled by a screwed connection with the torch body (1) and has two axially spaced-apart seats (17c,18b) respectively for the electrode (2) and the nozzle (3), and the electrode and the nozzle are freely slidably mounted in the skirt (4) and applied against their respective seats (17c,18b) solely under the action of the pressure of the plasma-producing gas.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: May 20, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Gerard Marhic, Eric Dufour
  • Process and plant for the cooling of a fluid and in particular the liquefaction of natural gas
    Patent number: 4586942
    Abstract: This process is of the type in which there is compressed in at least two stages 2, 6 a mixture of cooling fluids composed of constituents of different volatilities and in which, after the last stage 6 and after at least an intermediate compression stage 2, the mixture is partly condensed, the condensed fractions are expanded and vaporized in heat exchange with the fluid to be cooled before being compressed again. According to the invention, at least one of the condensation stages is carried out by sending to a distillation column 7 the mixture issuing from the corresponding stage of the compressor. This enables the thermodynamic irreversibility to be decreased and consequently permits a reduction of the specific cooling energy.
    Type: Grant
    Filed: January 31, 1984
    Date of Patent: May 6, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Pierre Gauthier
  • Disinfection and sterilizing solution of peracetic acid and nitric acid
    Patent number: 4587264
    Abstract: Commercial solutions of noncorrosive and time-stable carboxylic peracids, particularly peracetic acid, contain an acid of oxidizing nature, such as nitric acid, present in a weight percentage at least equal to that of the carboxylic peracid. Such solutions, diluted with ordinary water, are useful for the sterilization and microbiological disinfection of asceptic enclosures, and of equipment of the food industry, particularly the milk industry, with reduced risk of corrosion to the equipment.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: May 6, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Eric Jourdan-Laforte, Daniel Le Rouzic
  • Device for freezing biological products contained in straws
    Patent number: 4580409
    Abstract: The invention relates to the freezing of biological products contained in straws and more particularly to the initiation of the crystallization phase. A series of straws is disposed in such manner that the straws are arranged in parallel side-by-side relation and a crystallization bar (10) is mounted by springs (20) on two arms (11 and 12) connected to a rotary shaft (13). The arms shift the bar between a waiting position in a receiver-cradle (16) which is deeply cooled by a pipe (17-18) and an operative position in which is bears against the straws. Application in the freezing of blood cells, human and animal sperm, fragments of biological tissues and embryos, etc.
    Type: Grant
    Filed: January 4, 1985
    Date of Patent: April 8, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Nicole Angelier, Francois Colomb
  • Process and apparatus for producing a gas of high purity by vaporization of a cryogenic liquid
    Patent number: 4579566
    Abstract: The reservoir 1 contains in its lower part a purifying vessel 2 which contains a plate 9 having a bell means communicating with the reservoir and provided with an overflow pipe 12 through which liquid overflows into a bath having a constant level. When gas is drawn off from the top of the purifying vessel, liquid taken from the lower bath is vaporized in an exterior vaporizer 3 and the gas produced passes through the two baths in succession. In this way it is possible to obtain the gases having high purity devoid of particles of dust which are required for certain applications and in particular in the electronic component industry.
    Type: Grant
    Filed: February 28, 1984
    Date of Patent: April 1, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Jean-Renaud Brugerolle
  • Hydrogen-concentrating process and apparatus
    Patent number: 4578952
    Abstract: The starting gas is partly condensed in an exchanger 1. The refrigerating power is supplied, on one hand, by the free expansion of the liquid fraction and, on the other hand, by expansion in a gas-bearing turbine of the vapor fraction rich in hydrogen. A small part of this vapor fraction is used to feed auxiliary gases to the turbine, then is cooled in the exchanger 1, expanded and injected into the expanded liquid fraction so as to obtain a sufficiently low bubble point. The invention is useful in recovering hydrogen from purge gases of apparatus for ammonia synthesis, the purge gases being composed of hydrogen and less volatile components.
    Type: Grant
    Filed: May 8, 1984
    Date of Patent: April 1, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Pierre Gauthier
  • Method for manufacturing a sleeve, in particular for a container for storing a cryogenic fluid
    Patent number: 4577386
    Abstract: The method comprises winding on a mandrel M a tube 1 having a flattened cross-sectional shape so as to form a helical structure, mounting on the mandrel and the tube a sheet metal cylinder 2, injecting in the tube a fluid under pressure so as to cause the tube to assume, by expansion, the shape of a coiled tube having a circular cross-sectional shape and thereby locally deform the wall of the cylinder in the shape of a helical impression, and fixing the coiled tube to the cylinder so as to produce the sleeve. The invention applies in particular to containers for cryogenic fluids provided with coiled heating tubes in an interwall space containing a vacuum between the sleeve and the internal tank.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: March 25, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Yves Faudou, Pierre Pelloux-Gervais
  • Method of polishing the surface of glass articles
    Patent number: 4576571
    Abstract: A method of polishing the surface of a glass article consists in exposing the surface of the said article to a flame produced by oxygen and by a fuel. In order to obtain a perfect surface quality, whatever the thickness and configuration of the article processed, while preventing any premature collapse of the article in question, use is made of a flame such that the thermal energy originating from the transfer of heat by convection exceeds the thermal energy originating from the transfer of heat by radiation, and preferably of a flame of the oxygen-hydrogen type.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: March 18, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Luc Moufflet, Michel Roux, Jean Valadier
  • Container having a high degree of thermal insulation
    Patent number: 4572402
    Abstract: First, one end of a neck tube is adhesive bonded in an outwardly diverging frustoconical orifice of an inner vessel. The other end of the neck tube is then adhesive bonded in the outwardly converging frustoconical orifice of the upper part of the outer vessel. Thereafter the lower part of the outer vessel is welded or bonded to said upper part. The resulting container is useful for storing very high or very low temperature liquids.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: February 25, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Pierre P. Gervais, Bernard Simon
  • Process for purifying metals by insufflation and product produced thereby
    Patent number: 4568386
    Abstract: A process for refining pig iron from below the surface of a molten metal bath, and the resulting product, in which an oxidizing gas is injected in the bath and, during the last refining stage, a mixture of oxidizing gas and inert gas is further injected. The inert gas content x of the mixture is made to vary according to a law corresponding to an oxidizing gas dilution curve that is located in an area determined by two envelope curves, to wit, a first maximum dilution curve defined by the straight line portions:x=-766.7 %C+168.7 for 0.16<%C<0.22x=-550 %C+134 for 0.1<%C<0.16x=-233 %C+102 for %C<0.1and a second minimum dilution curve defined by the straight line portions:x=-1500 %C+255 for 0.14<%C<0.17x=-400 %C+101 for 0.1<%C<0.14x=-230 %C+84 for 0.05<%C<0.1x=-72.5 for %C<0.
    Type: Grant
    Filed: March 5, 1985
    Date of Patent: February 4, 1986
    Assignee: L'Air Liquid, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Claude Heller, Albert-Gilbert Goursat, Jean Foulard
  • Arc-striking method for a welding or cutting torch and a torch adapted to carry out said method
    Patent number: 4567346
    Abstract: The invention relates in particular to plasma cutting. The nozzle (5) is freely slidably mounted in the torch body so as to come into contact with the electrode if the torch is applied against the work piece (16). By disengaging the torch, an arc is struck between the electrode and the nozzle and then transferred to the work piece. Application in particular to low-power plasma torches.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: January 28, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Gerard Marhic
  • Casting process and installation for a non-ferrous metal in the molten state
    Patent number: 4565234
    Abstract: The invention relates to casting non-ferrous metal from a storage vessel of the said molten metal into a receiving vessel of the said metal in the form of a gravity-free jet. According to the process, an isolating zone from the ambient air, covering the said receiving vessel and the said zone is rendered inert by introducing a liquified inert gas prior to and during casting. The process applies in particular to the continuous casting of zinc into ingots molds.
    Type: Grant
    Filed: March 1, 1983
    Date of Patent: January 21, 1986
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Jean F. Rimbert
  • Process and apparatus for determining the quality of a thin coated or uncoated steel sheet
    Patent number: 4562715
    Abstract: The process is in particular intended for the manufacture of tinplate and comprises cutting a strip in the direction transverse to the direction of rolling of a reel of steel sheet, subjecting said strip to a drawing action by compression while bending the strip, and examining possible cracking on the surface of the drawn strip. This process is carried out in an apparatus which comprises a frame 1 supporting means 2 for pulling a steel strip and a head 4 for effecting a drawing action by compression while bending the strip. The head is connected to the frame and the steel strip 3 is passed through the head under the action of the pulling means 2.
    Type: Grant
    Filed: May 9, 1984
    Date of Patent: January 7, 1986
    Assignee: Union Siderurgique du Nord et de l'Est de la France
    Inventors: Charles G. H. Brun, Jean F. Bailleul, Freddy Lecendre, Francoise Coolen
  • Burner for pulverized coal
    Patent number: 4556384
    Abstract: This burner is so designed as to be capable of operating in a stable manner with no risk of explosion with pure oxygen or air highly enriched with oxygen as the reactant. In one embodiment, a stream of oxygen is delivered through a central tube 4A which terminates in a divergent annular diffuser 30. A mixture of air and pulverized coal is delivered in an intermediate ring 15 around this diffuser and an annular stream of whirling oxygen is delivered in an outer ring 16. Application in indirect heating furnaces, furnaces in which slag exists and cement-making furnaces and in cases where special atmospheres (for example reducing atmospheres) are desired.
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: December 3, 1985
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Serge Laurenceau, Luc Moufflet, Bernerd Genies
  • Arc working torches
    Patent number: 4555609
    Abstract: This invention relates to arc working torches.To prevent the operator from touching the live electrode, the free end of the torch is provided with a cowling formed by a protective skirt on the one hand and on the other hand by a tilting stirrup hinged on this skirt which engages on the torch body while closing an electrical circuit forming part of the safety circuit of the torch. The invention is applied to manual plasma cutting torches.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: November 26, 1985
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Gerard Marhic, Didier Schaff, Francis Remy