Issued Patents All Time
Showing 1–25 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12392202 | Down-the-hole drill hammer having a ribbed exhaust tube | — | 2025-08-19 |
| 11078736 | Flow diversion sub for a down-the-hole drill hammer | — | 2021-08-03 |
| 10669781 | Down-the-hole drill hammer having a roller bearing assembly | — | 2020-06-02 |
| D873316 | Non-rotating drill bit for a down-the-hole drill hammer | — | 2020-01-21 |
| D872142 | Drill bit for a down-the-hole drill hammer | — | 2020-01-07 |
| 10100578 | Pressure control check valve for a down-the-hole drill hammer | — | 2018-10-16 |
| 10024103 | Down-the-hole drill hammer having a roller ramp clutch | Abram Simeon Lance | 2018-07-17 |
| 9938774 | Non-rotating drill bit for a down-the-hole drill hammer | — | 2018-04-10 |
| 9821422 | Drill bit for a down-the-hole drill hammer having spirally arranged cutting inserts | — | 2017-11-21 |
| 8915314 | Down-the-hole drill drive coupling | — | 2014-12-23 |
| 8800690 | Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly | Warren T. Lay | 2014-08-12 |
| 8631884 | Pressure reversing valve assembly for a down-the-hole percussive drilling apparatus | Warren T. Lay | 2014-01-21 |
| 8622152 | Down-the-hole drill hammer having a sliding exhaust check valve | Warren T. Lay | 2014-01-07 |
| 8439135 | Down-the-hole drill hammer having an extendable drill bit assembly | Warren T. Lay | 2013-05-14 |
| 8397839 | Self-indexing down-the-hole drill | — | 2013-03-19 |
| 8302707 | Down-the-hole drill reverse exhaust system | — | 2012-11-06 |
| D656974 | Drill bit | Warren T. Lay | 2012-04-03 |
| 8141663 | Down hole hammer having elevated exhaust | Warren T. Lay | 2012-03-27 |
| 8011455 | Down hole hammer having elevated exhaust | Warren T. Lay | 2011-09-06 |
| 7832504 | Exhaust valve and bit assembly for down-hole percussive drills | Dale R. Wolfer, Timothy J. Plunkett | 2010-11-16 |
| 7665549 | Entrainment fluid channeling device for a down-hole drill string | — | 2010-02-23 |
| 7159676 | Fluid distributor device for down-hole-drills | — | 2007-01-09 |
| 6810974 | Quick release drill bit for down-hole drills | Richard K. Smith | 2004-11-02 |
| 6799641 | Percussive drill with adjustable flow control | Warren T. Lay, Jeffrey White | 2004-10-05 |
| 6135216 | Venting and sealing system for down-hole drills | Richard K. Smith | 2000-10-24 |