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Acker Drill Co. Patents |
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Assignee: Acker Drill Co.
Address: Scranton, PA
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4844489 |
Chuck apparatus and method |
July 4, 1989 |
| A chuck apparatus including a plurality of radially movable jaws for gripping a drill rod, each jaw being moved radially by an axially movable bowl, each jaw and the corresponding bowl surfaces are provided with two sets of camming surfaces, the first set of camming surface being oriente |
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