Patents by Inventor Frank Harold Hollister

Frank Harold Hollister 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).

  • Metal Reinforced Seal Plate for Pilot Actuated Spool Valve
    Publication number: 20160084396
    Abstract: Upper and/or lower seal plates of a sub plate mounted, pilot actuated spool valve are reinforced with one or more metal rings. In a number of preferred embodiments, the metal ring is comprised of steel. Portions of the seal plates may comprise an engineering thermoplastic such as polyoxymethylene (POM) sold by E. I. DuPont de Nemours under the DELRIN® trademark. The plastic material may be molded to the metal ring. In other embodiments, the plastic material and metal ring(s) are mechanically connected together.
    Type: Application
    Filed: December 3, 2015
    Publication date: March 24, 2016
    Inventors: Robert E. Smith, III, Frank Harold Hollister, Richard R. Watson, Dane Tipton
  • Metal Reinforced Seal Plate for Pilot Actuated Spool Valve
    Publication number: 20130319557
    Abstract: Upper and/or lower seal plates of a sub plate mounted, pilot actuated spool valve are reinforced with one or more metal rings. In a number of preferred embodiments, the metal ring is comprised of steel. Portions of the seal plates may comprise an engineering thermoplastic such as polyoxymethylene (POM) sold by E. I. DuPont de Nemours under the DELRIN® trademark. The plastic material may be molded to the metal ring. In other embodiments, the plastic material and metal ring(s) are mechanically connected together.
    Type: Application
    Filed: October 2, 2012
    Publication date: December 5, 2013
    Applicant: HUNTING ENERGY SERVICES, INC.
    Inventors: Robert E. Smith, III, Frank Harold Hollister, Richard R. Watson, Dane Tipton