Patents by Inventor Robert Holbrook Cushman

Robert Holbrook Cushman 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).

  • Self-balancing positive displacement casting system
    Patent number: 4019670
    Abstract: Improved methods and apparatus for positive displacement casting and/or for positive displacement bonding and, more particularly, for automatically forming, on a continuous, reproducible basis, fusion bonds devoid of structural, electrical and cosmetic defects between two or more workpieces by moving a heated electrode into the area to be bonded so as to uniformly heat and melt the portions of the workpieces to be bonded while, at the same time, displacing substantially all of the molten material from the area to be bonded into a storage area or reservoir surrounding the heated electrode where such molten material is maintained in its uniformly heated molten state, and then retracting the electrode so as to permit the molten material to return to the cavity formed by the electrode in the workpieces where such molten material is allowed to cool and solidify, thus forming a flawless bond between the workpieces--thermal or fusion bonds are made in accordance with the methods of the invention and with the apparat
    Type: Grant
    Filed: January 21, 1974
    Date of Patent: April 26, 1977
    Assignee: Gould Inc.
    Inventors: Robert Holbrook Cushman, Kurt R. Stirner, deceased
  • Method and apparatus for locating and locking onto workpieces in positive displacement casting
    Patent number: 3934782
    Abstract: Methods for positive displacement casting and/or for positive displacement bonding and, more particularly, for automatically locating the bonding apparatus with respect to the workpieces, locking thereon, and, thereafter forming, on a continuous, reproducible basis, fusion bonds devoid of structural, electrical and cosmetic defects between two or more workpieces by moving a heated electrode into the area to be bonded so as to uniformly heat and melt the portions of the workpieces to be bonded while, at the same time, displacing substantially all of the molten material from the area to be bonded into a storage area or reservoir surrounding the heated electrode where such molten material is maintained in its uniformly heated molten state, and then retracting the electrode so as to permit the molten material to return to the cavity formed by the electrode in the workpieces where such molten material is allowed to cool and solidify, thus forming a flawless bond between the workpieces--thermal or fusion bonds are
    Type: Grant
    Filed: March 12, 1975
    Date of Patent: January 27, 1976
    Assignee: Gould Inc.
    Inventors: Robert Holbrook Cushman, Raymond L. Schenk, Jr.