Patents Represented by Law Firm Schwartz, Jeffery, Schwab, Mack, Blumenthal & Kock
  • Method and device for repairing damaged screw propellers
    Patent number: 4161056
    Abstract: Damaged screw propellers are repaired by use of hollow, thin-walled envelopes, each envelope having surfaces corresponding in configuration to an outer portion of a screw propeller blade. Each envelope is located on a blade, and a workable material is interposed between the damaged blade portion and the hollow interior of the envelope. The workable material and the envelope become an integral part of the blade to substantially duplicate the original configuration of the blade.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: July 17, 1979
    Assignee: P.R.K., Inc.
    Inventor: Philip N. Dunham