Patents by Inventor John Verhaeg

John Verhaeg 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).

  • Electronic locks for doors
    Patent number: 4433355
    Abstract: An electronic lock for a door includes a built-in generator (20) for generating electrical energy for operating an electronic code recognition circuit and energizing a lock-release solenoid when appropriate. The generator (20) is linked to the door handle spindle (31) via a resilient mechanical energy storage device (24) which is "wound up" during the initial part of turning of the handle and tripped at a predetermined point to release stored energy into the generator (20).
    Type: Grant
    Filed: November 3, 1981
    Date of Patent: February 21, 1984
    Assignee: Yale Security Products Ltd.
    Inventors: Ivan Chew, John Verhaeg