Patents by Inventor Andre Perrin

Andre Perrin 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).

  • Parallel kinematic positioning system
    Patent number: 8215199
    Abstract: A parallel kinematic positioning system 10 (PKPS 10) that is comprised of a stationary base plate (12) and an upper movable platform (28) to which is attached a workpiece or an instrument. Between the stationary base plate (12) and the upper movable platform (28) are positionally attached six strut assemblies (50). The six strut assemblies operate a hexapod that include in combination, a counterbalance subassembly (111), a servo motor subassembly (134), a bearing and encoder subassembly (156) and an electronics circuit (190). The combination accurately and repeatably positions the upper movable platform (28) within six degrees of freedom relative to the base plate (12).
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: July 10, 2012
    Inventors: Sacha L. Marcroft, Andre′ Perrin, Robert Domes, Marc Webster, Fred L. Ansaldi
  • Parallel kinematic positioning system
    Publication number: 20100122602
    Abstract: A parallel kinematic positioning system 10 (PKPS 10) that is comprised of a stationary base plate (12) and an upper movable platform (28) to which is attached a workpiece or an instrument. Between the stationary base plate (12) and the upper movable platform (28) are positionally attached six strut assemblies (50). The six strut assemblies operate a hexapod that include in combination, a counterbalance subassembly (111), a servo motor subassembly (134), a bearing and encoder subassembly (156) and an electronics circuit (190). The combination accurately and repeatably positions the upper movable platform (28) within six degrees of freedom relative to the base plate (12).
    Type: Application
    Filed: November 17, 2008
    Publication date: May 20, 2010
    Inventors: Sacha L. Marcroft, Andre' Perrin, Robert Domes, Marc Webster, Fred L. Ansaldi
  • Process for the purification of para-nitrophenol
    Patent number: 3954892
    Abstract: In the nitration of phenol with nitric acid, decantation of the residual acid, and steam distillation of ortho-nitrophenol to leave an aqueous distillation residue of para-nitrophenol, a cleaner purer crystalline para-nitrophenol product is obtained by cooling the hot distillation residue when it contains at least 0.5% of sodium bisulphite and is at pH 5.4 to 6.4.
    Type: Grant
    Filed: March 13, 1973
    Date of Patent: May 4, 1976
    Assignee: Rhone-Poulenc, S.A.
    Inventor: Andre Perrin