Patents by Inventor Jean Plagne

Jean Plagne 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).

  • Chain with a single direction of curvature and application to a handrail
    Patent number: 4267922
    Abstract: The chain has a single direction of curvature and is capable of passing over pinions of small diameter. This chain is made up of a classic chain comprising at regular intervals a link to which is fixed a block having at least two rectilinear coplanar faces and tangent to the pins of the links and each extending over a length equal to the interval respectively from one part to the other of the link. An application of this chain consists in a variable speed handrail.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: May 19, 1981
    Assignee: Regie Autonome des Transports Parisiens
    Inventors: Pierre Patin, Jean Plagne