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Title: 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:
 [1];  [2];  [2]
  1. Oak Ridge, TN
  2. Albuquerque, NM
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
1043830
Patent Number(s):
8,176,995
Application Number:
12/424,583
Assignee:
Sandia Corporation (Albuquerque, NM) SNL
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 = {2012},
month = {5}
}

Patent:

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