Reduced-impact sliding pressure control valve for pneumatic hammer drill
Abstract
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.
- Inventors:
-
- Oak Ridge, TN
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1043830
- Patent Number(s):
- 8176995
- Application Number:
- 12/424,583
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Polsky, Yarom, Grubelich, Mark C, and Vaughn, Mark R. Reduced-impact sliding pressure control valve for pneumatic hammer drill. United States: N. p., 2012.
Web.
Polsky, Yarom, Grubelich, Mark C, & Vaughn, Mark R. Reduced-impact sliding pressure control valve for pneumatic hammer drill. United States.
Polsky, Yarom, Grubelich, Mark C, and Vaughn, Mark R. Tue .
"Reduced-impact sliding pressure control valve for pneumatic hammer drill". United States. https://www.osti.gov/servlets/purl/1043830.
@article{osti_1043830,
title = {Reduced-impact sliding pressure control valve for pneumatic hammer drill},
author = {Polsky, Yarom and Grubelich, Mark C and Vaughn, Mark R},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2012},
month = {Tue May 15 00:00:00 EDT 2012}
}
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.