Patents Assigned to Esco Elevators, Inc.
  • 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