| 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: 12/364600 |
| 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. |
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