Patents by Inventor David P. Sutherland

David P. Sutherland 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).

  • Cylinder lock and auxiliary locking mechanism
    Patent number: 8186194
    Abstract: A tumbler pin lock includes an auxiliary locking mechanism including an auxiliary locking pin to provide enhance locking in addition to the locking provided by the tumbler pins so that the lock remains locked even if the tumblers are picked or bumped into their unlocked positions.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: May 29, 2012
    Assignee: Medeco Security Locks, Inc.
    Inventors: Peter H. Field, David P. Sutherland, Glenn Hartman, Mark Benzie, Walt Dannhardt, Kevin Galliher, Dan Boadwine, Clyde T. Roberson
  • Hierarchical cylinder lock systems
    Patent number: 7797973
    Abstract: A hierarchical lock system includes a first cylinder lock having a cylindrical plug, rotatable, reciprocating tumbler pins, a slider disposed within the plug and a side bar that cooperates with the cylinder plug, the slider, and the tumbler pins to control rotation of the lock. A second cylindrical lock includes a cylindrical plug, reciprocating tumbler pins, a slider, and a side bar that cooperates with the cylindrical plug and the slider. A first key is configured to open both the first and second locks by elevating and rotating the tumbler pins, and moving the slider to an unlocked position with respect to the side bar. A second key is able to open only the second cylindrical locks by elevating but not rotating the tumbler pins and by moving the slider to an unlocked position with respect to the side bar.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: September 21, 2010
    Assignee: Medeco Security Locks, Inc.
    Inventors: Peter H. Field, David P. Sutherland, Clyde T. Roberson
  • Cylinder Lock and Auxiliary Locking Mechanism
    Publication number: 20090241620
    Abstract: A tumbler pin lock includes an auxiliary locking mechanism including an auxiliary locking pin to provide enhance locking in addition to the locking provided by the tumbler pins so that the lock remains locked even if the tumblers are picked or bumped into their unlocked positions.
    Type: Application
    Filed: March 27, 2009
    Publication date: October 1, 2009
    Applicant: MEDECO SECURITY LOCKS, INC.
    Inventors: Peter H. FIELD, David P. SUTHERLAND, Glenn Hartman, Mark BENZIE, Walt DANNHARDT, Kevin GALLIHER, Dan BOADWINE, Clyde T. ROBERSON
  • HIERARCHICAL CYLINDER LOCK SYSTEMS
    Publication number: 20080223097
    Abstract: A hierarchical lock system includes a first cylinder lock having a cylindrical plug, rotatable, reciprocating tumbler pins, a slider disposed within the plug and a side bar that cooperates with the cylinder plug, the slider, and the tumbler pins to control rotation of the lock. A second cylindrical lock includes a cylindrical plug, reciprocating tumbler pins, a slider, and a side bar that cooperates with the cylindrical plug and the slider. A first key is configured to open both the first and second locks by elevating and rotating the tumbler pins, and moving the slider to an unlocked position with respect to the side bar. A second key is able to open only the second cylindrical locks by elevating but not rotating the tumbler pins and by moving the slider to an unlocked position with respect to the side bar.
    Type: Application
    Filed: March 12, 2008
    Publication date: September 18, 2008
    Applicant: MEDECO SECURITY LOCKS, INC.
    Inventors: Peter H. Field, David P. Sutherland, Clyde T. Roberson