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John L. Moorehead Patents |
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Inventor: Moorehead; John L.
Address: Mentor, OH
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4745983 |
Bit seat protector device for drilling systems or the like |
May 24, 1988 |
| The present invention relates to a seat protector device of the type which may be employed with drill rods for transmission of thrust from a driving member to a driven member. More specifically, the invention relates to an improved drill rod system for earth drilling where the rod also p |
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