Patents by Inventor Philip S. Burkholder

Philip S. Burkholder 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).

  • Single crystal vane segment and method of manufacture
    Patent number: 6800148
    Abstract: The present invention contemplates a multi-airfoil vane segment produced as a single crystal casting from a rhenium containing directionally solidified alloy. The single crystal casting containing grain boundary strengtheners.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: October 5, 2004
    Assignee: Rolls-Royce Corporation
    Inventors: Donald J. Frasier, Philip S. Burkholder
  • Single crystal vane segment and method of manufacture
    Publication number: 20030150534
    Abstract: The present invention contemplates a multi-airfoil vane segment produced as a single crystal casting from a rhenium containing directionally solidified alloy. The single crystal casting containing grain boundary strengtheners.
    Type: Application
    Filed: February 24, 2003
    Publication date: August 14, 2003
    Inventors: Donald J. Frasier, Philip S. Burkholder
  • Connection for gas turbine engine rotor elements
    Patent number: 5052891
    Abstract: A connection between flanged elements of a gas turbine engine rotor. The connection includes a first annular flange on a first rotor element having a plurality of radially outwardly opening slots, an annular locking ring having a plurality of bolt holes, a second annular flange on a second rotor element, and a plurality of bolts each having a shank with a head at one end and a screw thread at the other end and a locking shoulder therebetween. The bolts are installed radially in the slots so that minimum clearance is required behind the first annular flange. The locking ring fits over the bolt shanks and is press fitted onto the locking shoulders of the bolts so that radial and axial dislodgment of the bolts from the slots is foreclosed. The second annular flange is fitted over the bolt shanks and nuts are screwed onto the bolts to retain the second annular flange.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: October 1, 1991
    Assignee: General Motors Corporation
    Inventor: Philip S. Burkholder