Patents Assigned to E & J Demark, Inc.
  • Patent number: 6979207
    Abstract: An electrical connector for connecting a ground wire and a ground rod. The electrical connector having a metal body including a top and a cylindrical side wall. The body having a first internal wall defining a ground rod cavity and a second internal wall defining a ground wire cavity being positioned adjacent to and in communication with the ground rod cavity.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: December 27, 2005
    Assignee: E & J Demark, Inc.
    Inventors: Jeffrey P. Wenger, David M. Harman
  • Publication number: 20040132356
    Abstract: An electrical connector for connecting a ground wire and a ground rod. The electrical connector having a metal body including a top and a cylindrical side wall. The body having a first internal wall defining a ground rod cavity and a second internal wall defining a ground wire cavity being positioned adjacent to and in communication with the ground rod cavity.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 8, 2004
    Applicant: E & J DeMARK, Inc.
    Inventors: Jeffrey P. Wenger, David M. Harman
  • Patent number: 6137049
    Abstract: An electrical ground connector assembly for providing a fast, secure, moisture-resistant ground connection without using special tools. The electrical ground connector assembly includes a ground rod and a cap having an tapered rod chamber for receiving the ground rod. The cap also includes a slot for receiving a ground wire. The angle of the slot may vary, depending on the diameter of the ground wire. The cap may be cylindrical or rectangular in shape. In installation, the ground wire is inserted into the slot of the cap. The upper end of the ground rod is forced into the rod cavity of the cap by any suitable manner, such as hammering the cap down over the ground rod. As the upper end of the ground rod reaches the end of the rod cavity, a compression contact is made between the wire and said ground rod. Alternatively, the ground rod can first be driven into the ground, and then the ground wire and the cap can be assembled on the ground rod.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: October 24, 2000
    Assignee: E & J DeMark, Inc.
    Inventor: John David Hecock
  • Patent number: 5864093
    Abstract: An electrical ground connector assembly for providing a fast, secure, moisture-resistant ground connection without using special tools. The electrical ground connector assembly includes a ground rod and a cap having an tapered rod chamber for the ground rod. The cap also includes at least one wire hole adjacent the tapered rod chamber at the bottom of the cap for receiving a ground wire. The wire hole is preferably at an angle of approximately six degrees with respect to the tapered rod chamber and merges with or intersects the rod chamber. In installation, the ground wire is inserted into the wire hole through the bottom of the cap. The upper end of the ground rod is forced into the rod cavity of the cap by any suitable manner, such as hammering the cap down over the ground rod. As the upper end of the ground rod reaches the end of the rod cavity and the ground wire extending into the cavity, it contacts and wedges itself into mechanical and electrical contact therewith.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: January 26, 1999
    Assignee: E & J Demark, Inc.
    Inventors: J. Edwin Hecock, Jeffrey P. Wenger
  • Patent number: 5188187
    Abstract: The present invention comprises an electrical grounding rod driving tool for use with an externally powered hammer comprising a shaft portion for insertion into a tool receiving chuck of the hammer and a base portion extending outwardly from said shaft portion which receives and retains the end of a grounding rod to which the powered hammer is applied. The base portion comprising an inwardly extending elongated tapering bore from the exterior end of said base portion which bore is identified as a conical bore, the interior terminus of said bore being truncated and terminating in a concave cap, the outer circumference of which is in tangential relationship with the walls of said inwardly extending conical bore. The diameter of said bore at said exterior is greater than the original exterior diameter of the rod to be driven, the diameter of said bore at the truncated terminus being less than the original diameter of said rod.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: February 23, 1993
    Assignee: E & J Demark, Inc.
    Inventor: James O. Mumper
  • Patent number: 4557409
    Abstract: The present invention is a double-headed hammer slidingly encompassing a ground rod driving shaft having a single anvil affixed thereto which can be selectively engaged by either hammer. The driving shaft has a recess in each end to receive the grounding rod, depending upon whether the action is to initiate and continue the insertion of grounding rod into the ground or to complete the insertion of the rod in accordance with the provisions of the Code. The present invention does not require the operator to take a position above the ground or to use any other instrument to make the complete and proper insertion of the grounding rod into the ground.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: December 10, 1985
    Assignee: E & J Demark, Inc.
    Inventors: J. Edwin Hecock, James O. Mumper