Patents by Inventor Samir Elguindy

Samir Elguindy 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).

  • Patent number: 4134231
    Abstract: A pneumatic powered door operator including a pneumatic differential engine with an output shaft having a slide bar applying driving action through a roller to a multiplying lever wherein the multiplying lever is pivotally mounted at one end and provided with a roller at the other end and linkage means for interconnecting the multiplying lever to a slidable door. An electropneumatic control circuit controls the operation of the engine and includes a pneumatic spring arrangement which allows manual operation of the door during electrical failure with air available while being capable of maintaining the door in a closed position when not manually actuated.
    Type: Grant
    Filed: May 9, 1977
    Date of Patent: January 16, 1979
    Assignee: Vapor Corporation
    Inventors: Kristupas Daugirdas, Samir Elguindy