Patents Assigned to CRI-DAN
  • Patent number: 4185524
    Abstract: A lathe according to the parent patent application. Each tool-holder bar of a carriage is provided with a longitudinal channel whose opposite faces are parallel to said common plane and inside which there slidingly fits a heel provided on the corresponding tool-holder bar of the other carriage.
    Type: Grant
    Filed: September 19, 1978
    Date of Patent: January 29, 1980
    Assignee: Cri-Dan
    Inventor: Roland R. Laurent
  • Patent number: 4168925
    Abstract: A device for boring out tubes, comprising a boring bar with cutting tools on its periphery and an axial channel for coolant liquid injection communicating with radial injection ducts emerging in front of said tools.The boring bar is provided at its end with a fixed cover whose outer diameter is less than the inner diameter of the rough tube to be machined, this cover being provided with a peripheral flange directed towards the tools and which is located at the level of the radial injection ducts.Application : for machining tubes in the oil industry.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: September 25, 1979
    Assignee: Cri-Dan
    Inventor: Yves J. Dufresne
  • Patent number: 4160395
    Abstract: A thread-cutting machine, of the type which includes a longitudinal carriage whose reciprocal movements are obtained from a first cam, called pitch cam, a transverse carriage carrying a tool and whose reciprocal movements are obtained from a second cam, called forward and backward movement cam, and means for ensuring the progression of the tool towards the work piece during successive threading cuts is characterized in that the tool progression means are formed by a numerical control motor capable of ensuring the transverse movement of the forward and backward movement cam and a third cam is operatively connected between the pitch cam and forward and backward movement cam for synchronizing the reciprocal movement of the forward and backward movement cam with the pitch cam.
    Type: Grant
    Filed: October 5, 1977
    Date of Patent: July 10, 1979
    Assignee: Cri-Dan
    Inventor: Georges C. Mulot
  • Patent number: 3937110
    Abstract: A lathe for machining interior surfaces of revolution in hollow parts supported on a rotational axis by a head-stock and including a pair of transversely and longitudinally movable carriages arranged symmetrically on the work piece rotatable axis, the carriages each supporting at least one tool holder bar projecting along the work piece rotational axis and having a cooperating cross-sectional configuration by which the tool holder bars are supported along their length by engagement with each other. Alternatively the carriages may support turrets each carrying a plurality of cooperable tool holding bars in a manner such that the operative pair of tool holding bars derives similar support one from the other. In both embodiments, the cutting tools supported by the bars are disposed on a diametric plane inclined with respect to the holder bar in engagement plane to resolve all cutting forces into exclusively torsion on the tool holder bars.
    Type: Grant
    Filed: April 1, 1075
    Date of Patent: February 10, 1976
    Assignee: CRI-DAN
    Inventor: Pierre E. Renoux