Patents by Inventor John Collis

John Collis 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).

  • Piston-cylinder assembly with a bellows
    Patent number: 7032896
    Abstract: Piston-cylinder assembly, comprising a container tube, in which a piston rod is guided with freedom of axial movement, which rod is at least partially covered by a sheath tube with at least one elastic fold, where a resilient stop pad is provided concentrically to the piston rod, the end of which pad comes to rest against an end cap during the inward travel of the piston rod, which end cap rests against the container tube in the fully assembled piston rod assembly. The stop pad, the sheath tube, and the end cap form a preassembled unit which is independent of the piston rod assembly, the end cap being pressed onto the container tube by the resilient stop pad during the inward travel of the piston rod into the container tube.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: April 25, 2006
    Assignee: ZF Sachs AG
    Inventors: John Collis, Volker-Oliver Hupperich
  • Piston-cylinder assembly with a bellows
    Publication number: 20020189441
    Abstract: Piston-cylinder assembly, comprising a container tube, in which a piston rod is guided with freedom of axial movement, which rod is at least partially covered by a sheath tube with at least one elastic fold, where a resilient stop pad is provided concentrically to the piston rod, the end of which pad comes to rest against an end cap during the inward travel of the piston rod, which end cap rests against the container tube in the fully assembled piston rod assembly. The stop pad, the sheath tube, and the end cap form a preassembled unit which is independent of the piston rod assembly, the end cap being pressed onto the container tube by the resilient stop pad during the inward travel of the piston rod into the container tube.
    Type: Application
    Filed: May 13, 2002
    Publication date: December 19, 2002
    Applicant: ZF Sachs AG
    Inventors: John Collis, Volker-Oliver Hupperich