Reduced-impact sliding pressure control valve for pneumatic hammer drill
Patent
·
OSTI ID:1043830
- Oak Ridge, TN
- Albuquerque, NM
A method and means of minimizing the effect of elastic valve recoil in impact applications, such as percussive drilling, where sliding spool valves used inside the percussive device are subject to poor positioning control due to elastic recoil effects experienced when the valve impacts a stroke limiting surface. The improved valve design reduces the reflected velocity of the valve by using either an energy damping material, or a valve assembly with internal damping built-in, to dissipate the compression stress wave produced during impact.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Number(s):
- 8,176,995
- Application Number:
- 12/424,583
- OSTI ID:
- 1043830
- Country of Publication:
- United States
- Language:
- English
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