Patents by Inventor Edwin D. Ditto

Edwin D. Ditto 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).

  • Patent number: 4076788
    Abstract: A method of compression molding a special purpose coating or skin onto the surface of a freshly molded polymeric substrate, including the steps of: injecting a skin-forming material between the surface to be coated and the die forming that surface such that the substrate is hydraulically immobilized within the mold cavity during separation of the die from the substrate surface, and thereafter compression molding the skin-forming material over the surface.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: February 28, 1978
    Assignee: General Motors Corporation
    Inventor: Edwin D. Ditto
  • Patent number: 4076780
    Abstract: A compression molding operation is controlled by applying a press force to a mold having a cavity charged with molding compound. The separation of the mold halves is measured at each corner thereof by linear variable differential transformers. Hydraulic cylinders operating on the press ram generally in the area of each corner of the molds are individually controlled to locally vary the press force on the molds to maintain mold parallelism as determined by the LVDT's to control the velocity of press closing also as measured by the LVDT's according to a preprogrammed velocity profile, and further to control the amount of press force applied to the molds according to a preprogrammed value during curing of the molding compound.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: February 28, 1978
    Assignee: General Motors Corporation
    Inventor: Edwin D. Ditto
  • Patent number: 4076296
    Abstract: A low-cost, easily fabricated bumper structure for the alleviation of repeated, low-magnitude impact shocks on a vehicle. The bumpers utilize structural elements of fiberglass or similar lightweight, high-strength materials to absorb energy of impact. The fiberglass elements of the subject bumper are fabricated by relatively inexpensive manufacturing processes, such as molding, pulltruding or extruding.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: February 28, 1978
    Assignee: General Motors Corporation
    Inventors: Edwin D. Ditto, A. Hadi Kobaisi Abu Akeel
  • Patent number: 4059876
    Abstract: A mass of alloy material is deposited on a valve seat and is heated to alloying temperature by a laser beam which sweeps around the valve seat thereby alloying the valve seat. While the alloyed material is still at a high temperature, the forming tool is pressed against the valve seat to shape the valve seat to a configuration which requires little or no grinding.
    Type: Grant
    Filed: November 3, 1976
    Date of Patent: November 29, 1977
    Assignee: General Motors Corporation
    Inventor: Edwin D. Ditto
  • Patent number: 3952922
    Abstract: In accordance with a preferred embodiment of this invention, a precessing bottom pour stopper is used to accurately and precisely control the flow of molten metal through the tap hole which is located in the bottom of a metallurgical vessel. The precessional movement of the stopper, as it moves into and/or out of sealing engagement with the tap hole, removes any debris which may be lodged between the sealing surfaces and thereby ensures a tight seal over a prolonged period of operation.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: April 27, 1976
    Assignee: General Motors Corporation
    Inventors: Edwin D. Ditto, A. Hadi K. Akeel