Patents by Inventor Steven H. Buehler

Steven H. Buehler 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).

  • Current limiting circuit breaker with over-molded magnet and metal plates
    Patent number: 5223681
    Abstract: A molded plastic current limiting circuit breaker having for each pole, a stationary and movable contact separable upon occurrence of a current higher than a predetermined level. The stationary and movable contacts are positioned inside an over-molded magnet opening to greatly increase the magnetic repulsion force between them and rapidly accelerate their separation by concentrating the magnetic fields generated upon an occurrence of a high level short circuit. The over-molded magnet is composed of a plurality of steel plates grouped together and being over molded with a thermoplastic material. The thermoplastic material has grooves integrally formed therein for retaining insulator inserts that protect the thermoplastic material during separation of the stationary and movable contacts.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: June 29, 1993
    Assignee: Square D Company
    Inventors: Steven H. Buehler, Christopher M. Diekman, Charles E. Netolicky, Timothy R. Faber