Patents by Inventor Everett E. Johnston

Everett E. Johnston 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: 4807890
    Abstract: An improvement in a sealing combination between a head of a hydraulic cylinder and a plastic covered cable traversing therethrough, including the plastic covered cable connected with a piston interiorly of the cylinder so as to be moved longitudinally responsive to hydraulic pressure applied to the piston traversing interiorly of the cylinder, a gland disposed about and sealingly encompassing the plastic covered cable, a head defining an annular packing box about the plastic covered cable and adapted to receive the gland for holding a seal in place and a wiper ring disposed in the gland and about the plastic covered cable for wiping dirt and the like therefrom before the cable enters the sealing combination; characterized by a split ring of resilient material emplaced in the bottom of the packing box and encompassing the plastic covered cable without sealing engagement therewith; a split backup compression ring of thermoplastic material disposed in the packing box so as to be responsive to the compressive for
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: February 28, 1989
    Assignee: Esco Elevators, Inc.
    Inventors: Gerald W. Gorman, Everett E. Johnston
  • Patent number: 4671388
    Abstract: In a cable-cylinder type hydraulic elevator there is provided a piston and cable termination assembly that makes possible the removal and replacement of seal means and/or bearing means without the necessity for either disturbing the cable termination inside the cable socket member or cutting the cable and making a new termination.
    Type: Grant
    Filed: May 23, 1986
    Date of Patent: June 9, 1987
    Assignee: Esco Elevators, Inc.
    Inventor: Everett E. Johnston