Patents by Inventor David F. Sanchez

David F. Sanchez 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: 4446888
    Abstract: A valve block for glassware forming machines is rendered faster and more accurate by substituting, for the pilot air valve system, a plurality of solenoids directly coupled with the cartridge valves, the coupling between said solenoids and said valves comprising a lost motion mechanical memory which, on reception of one pulse by the solenoid, pushes the cartridge valve and forces it to remain open, until reception of the next pulse by said solenoid, when it releases the cartridge valve to be closed; and a compensating spring, which is stronger than the force necessary to open said valves but weaker than the maximum force exerted by said solenoid, between said lost motion mechanical memory and said cartridge valve.
    Type: Grant
    Filed: December 15, 1981
    Date of Patent: May 8, 1984
    Assignee: Vitro-Tec Fideicomiso
    Inventors: Jorge A. Heredia de la Paz, David F. Sanchez