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Drilco Industrial, Inc. Patents |
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Assignee: Drilco Industrial, Inc.
Address: Midland, TX
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4943172 |
Drill deck bushing |
July 24, 1990 |
| A shock absorbing roller deck bushing for rotary blast hole drills has a steel inner liner with a cylindrical axial bore for receiving a drill string. The liner is rotatably disposed within an outer shell mounted in the drill deck. A split retainer plate is attached to the outer shell an |
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