Patents by Inventor Jean-Paul Lespour

Jean-Paul Lespour 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).

  • Apparatus and process permitting the cold forming of grooves on the wall of a revolving part
    Patent number: 5339669
    Abstract: The apparatus and process according to the invention relate to the cold forming by rolling of revolving parts (7).The apparatus comprises two identical milling wheels (9A, 9B) arranged symmetrically with respect to the part (7) to be formed and performing the same rotation movement at speed Vm and progressively moving towards the axis of the part to be formed (X1--X1). The part (7) performs a rotation movement at speed Vp such that Vp=Vm.multidot.N1/N2, N1 being the number of grooves on each wheel (9A, 9B), N2 the number of grooves to be formed on the part (7). An initial setting makes it possible to bring about coincidence between the grooves formed by each of the milling wheels on the part (7).The apparatus and process make it possible to obtain high precision parts.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: August 23, 1994
    Assignee: Escofier Technologie S.A.
    Inventors: Michel Cretin, Jean-Paul Lespour, Charles Marcon