This will not work in tough driving conditions. Specifically, they do not have the splines that provide additional surface contact, their taper is not as long, and they are not capable of meeting much variation in rod diameter causing a possible fit problem. Driving the ground rod is accomplished by lifting cylinder 10 and bringing it down repeatedly for the contact between striking face 13a and striking surface 22a. The TG allows for easy and safe driving of a temporary ground rod and also easy removal of the rod. The only disadvantage being the expense of the product. An additional plus of the DeMARK threadless couplers is not being hampered by weather conditions in the installation process.

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An additional plus of the DeMARK threadless couplers is not being hampered by weather conditions in the installation process. The present invention does not require the operator to take a demwrk above the ground or to use any other instrument to make the complete and proper insertion of the grounding rod into roe ground.

United States Patent What is claimed is: We can often make variations of these products without significant additional cost.

It is good for truck grounding as well as doing soil resistivity tests. This is an exclusive design that is simple and proven to be effective.

Now, after several years of developmental work, that goal has been met. Over the next few years, DeMark Inc.


As you can see from the cross sectional grkund of the DeMARK coupler Figure 1there are two primary features — the taper and the splines. As the coupled rods are driven, the splines ensure that the coupler becomes increasingly tighter, resulting in an excellent connection. A new coupler was obviously needed.

However, it proved impossible to obtain a uniform 5 mils of plating as required by Detroit Edison, and the bimetallic composition posed a problem with corrosion.

DeMARK manufactures and designs all its own products.

We have success stories; we have a track record; and we have had successful development. For custom applications, we offer quick lead times as all of our products are built at one location.

1115 Ottokee St. ● P.O. Box 416 ● Wauseon, OH Tel ● Fax WEB: ●

History has shown that the speed of driving ground rods increases with the use of Drive Points. The amount of taper is critical to insure a tight fit.

Edwin Hecock and James P. Be sure to check out all the training. Driving demaek 15 had an overall length of 24 inches with recesses 16 and 17 each of 3 inch depth, the shaft having an outside diameter of 1 inch.

Greater pull out strength. Establishment of an industry at a particular place. Theory and common sense say the concept works…. There are other means that have been developed by various utilities. There are more and more concerns in the field about adequate ground wire to ground rod connections. Copper plate, Galvanized, Stainless, or any other material.


Starting inDeMark moved to a new manufacturing facility and began production, not only of their proprietary products for the Utility and Phone markets but also as a quality manufacturer of screw machined products. This leaves about 7 feet of the grounding rod plus the length of the present invention extending above ground, well within the reach of the average operator. Dwmark utilizes a concept of compression, which helps provide a good ground, by driving the connector that has a tapered hole.

DeMARK holds 4 patents related to electrical grounding.

Electrical grounding rod driving device – E & J Demark, Inc.

Registration Forgot your password? A SumoBrain Solutions Company. DeMARK offers an innovative combination of production machining, CNC machining, screw machining, multi-spindle drilling, through broaching, button broaching, assembly, and dedicated manufacturing cells. The driver has the striking force inside the unit that allows for force to be directed upward as well as downward. The National Electrical Code has established that grounding rods shall be 8 feet in length, generally of solid stock and shall be driven into the ground so that the top of the rod is about 12 inches below ground level.

While utilities do not all have the same standards, geound do have a common goal.