Patents by Inventor Robert E. Matthiessen

Robert E. Matthiessen 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).

  • Safety mechanism for materials handling system
    Patent number: 7845607
    Abstract: A safety lock comprises a locking member (26, 28) which engages a support. An inner lock shaft (30a) actuates the locking member, the inner lock shaft having a first coupling face (35a) at one end thereof. An outer lock shaft (30b) has a second coupling face (35b) which engages the first coupling face when the inner lock shaft and the outer lock shaft are in respective engagement positions relative to each other. A coupling structure (18) moves to prevent engagement of said first coupling face with said second coupling face.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: December 7, 2010
    Assignee: inTEST Corporation
    Inventors: Robert E. Matthiessen, Christopher L. West
  • Method and apparatus for automated docking of a test head to a device handler
    Patent number: 5900737
    Abstract: A positioner facilitates docking and undocking of an electronic test head with a device handler. The positioner provides for rotation of the test head about a first axis. The positioner includes a linkage arm structure for moving the test head along a second axis orthogonal to the first axis. Using motors, sensors and a processor, the linkage arm structure accurately docks the electronic test head with the device handler.
    Type: Grant
    Filed: May 7, 1996
    Date of Patent: May 4, 1999
    Assignee: inTEST Corporation
    Inventors: Daniel J. Graham, Alyn R. Holt, Robert E. Matthiessen, I. Marvin Weilerstein, Christopher L. West
  • Method and apparatus for automated docking of a test head to a device handler
    Patent number: 5600258
    Abstract: A positioner facilitates docking and undocking of an electronic test head with a device handler. The positioner provides for rotation of the test head about a first axis. The positioner includes a linkage arm structure for moving the test head along a second axis orthogonal to the first axis. Using motors, sensors and a processor, the linkage arm structure accurately docks the electronic test head with the device handler.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: February 4, 1997
    Assignee: inTEST Corporation
    Inventors: Daniel J. Graham, Alyn R. Holt, Robert E. Matthiessen, I. Marvin Weilerstein, Christopher L. West
  • Electronic test head manipulator
    Patent number: 5440943
    Abstract: A positioner facilitates docking and undocking of an electronic test head with a device handler. The position provides for rotation of the test head about a first axis.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: August 15, 1995
    Assignee: inTEST Corporation
    Inventors: Alyn R. Holt, Robert E. Matthiessen, Christopher L. West
  • Device testing system with cable pivot
    Patent number: 5030869
    Abstract: A device testing system of the type in which an electronic test head is mounted for pivotal movement about three orthogonal axes. Cables are connected between a test cabinet and the test head to carry electronic signals. The test head is directly mounted to, and the cable is introduced to the test head through, a split ring cable pivot.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: July 9, 1991
    Assignee: inTEST Corporation
    Inventors: Alyn R. Holt, Robert E. Matthiessen
  • Safety lock for materials handling system
    Patent number: 4715574
    Abstract: A materials handling system in which a load is maintained in a substantially weightless condition for easy and accurate positioning. A safety lock is introduced to prevent unlocking of the system if a condition of imbalance takes place while the system is locked.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: December 29, 1987
    Assignee: inTest Corporation
    Inventors: Alyn R. Holt, Robert E. Matthiessen