Sliding pressure control valve for pneumatic hammer drill
| Patent Number: | 8,006,776 |
| Issued: | 8/30/2011 |
| Official Filing: | View the Complete Patent |
| Abstract: | A pneumatic device control apparatus and method comprising a ported valve slidably fitted over a feed tube of the pneumatic device, and using a compliant biasing device to constrain motion of the valve to provide asymmetric timing for extended pressurization of a power chamber and reduced pressurization of a return chamber of the pneumatic device. The pneumatic device can be a pneumatic hammer drill. |
| Filed: | 2/3/2009 |
| Application Number: | 12/364,600 |
| Government Interests: | STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |