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Francis X. Tully Patents |
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Inventor: Tully; Francis X.
Address: Thompson, PA
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5494119 |
Core sampling device |
February 27, 1996 |
| The obtaining of undisturbed core samples of subsurface soils for analysis and study is disclosed. Percussion-type downhole drilling equipment uses compressed air directed internally of a pipe casing to actuate a percussion-type piston adjacent the bottom of a hole being drilled. A t |
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