Patents by Inventor John L. Lundgren

John L. Lundgren 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).

  • Lockout and cover interlock for circuit breaker
    Patent number: 4037184
    Abstract: A molded case multi-pole circuit breaker is provided with a solid state trip unit having removable and replaceable rating plug. A mechanical interlock trips the circuit breaker when a cover portion thereof is opened. This cover portion must be opened to gain access to the rating plug. A mechanical lockout device is actuated when rating plug is removed to maintain the breaker tripped and to prevent resetting thereof until a rating plug is reinserted in the trip unit.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: July 19, 1977
    Assignee: I-T-E Imperial Corporation
    Inventors: Francis W. Kempisty, Jr., John L. Lundgren