Patents by Inventor Pierre BILLAT

Pierre BILLAT has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for brazing or refilling a part with micro-interstices, and heat exchanger obtained with such a method
    Patent number: 11280555
    Abstract: Method for brazing or refilling comprising the following steps: providing at least one part (51) containing a metal or metal alloy, for example stainless steel, the part (51) having at least one face (59) defining a plurality of interstices (61) comprising at least two opposite edges separated on the face (59) by a maximum distance of not more than 250 micrometres; obtaining a coating (R) in contact with said face and comprising at least a first layer (85), located at least partially in the interstices, and a second layer (87) adjacent to the first layer, the first layer (85) comprising a first powder (A) containing a metal or metal alloy, the second layer comprising a mixture of a second powder (B) and a third powder (C), the second powder and the third powder being, respectively, different alloys suitable for brazing or refilling the part, and the solidus temperature TSC of the third powder being lower than the solidus temperature TSB of the second powder; heating the part and the coating at a heating te
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: March 22, 2022
    Assignee: STIRAL
    Inventors: Thierry Mazet, Pierre Billat
  • METHOD FOR BRAZING OR REFILLING A PART WITH MICRO-INTERSTICES, AND HEAT EXCHANGER OBTAINED WITH SUCH A METHOD
    Publication number: 20200173727
    Abstract: Method for brazing or refilling comprising the following steps: providing at least one part (51) containing a metal or metal alloy, for example stainless steel, the part (51) having at least one face (59) defining a plurality of interstices (61) comprising at least two opposite edges separated on the face (59) by a maximum distance of not more than 250 micrometres; obtaining a coating (R) in contact with said face and comprising at least a first layer (85), located at least partially in the interstices, and a second layer (87) adjacent to the first layer, the first layer (85) comprising a first powder (A) containing a metal or metal alloy, the second layer comprising a mixture of a second powder (B) and a third powder (C), the second powder and the third powder being, respectively, different alloys suitable for brazing or refilling the part, and the solidus temperature TSC of the third powder being lower than the solidus temperature TSB of the second powder; heating the part and the coating at a heating te
    Type: Application
    Filed: May 17, 2018
    Publication date: June 4, 2020
    Inventors: Thierry MAZET, Pierre BILLAT