skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Long-life leak standard assembly

Abstract

The present invention is directed to a portable leak standard assembly which is capable of providing a stream of high-purity reference gas at a virtually constant flow rate over an extensive period of time. The leak assembly comprises a high pressure reservoir coupled to a metal leak valve through a valve-controlled conduit. A reproducible leak valve useful in this assembly is provided by a metal tube crimped with a selected pressure loading for forming an orifice in the tube with this orifice being of a sufficient size to provide the selected flow rate. The leak valve assembly is formed of metal so that it can be "baked-out" in a vacuum furnace to rid the reservoir and attendent components of volatile impurities which reduce the efficiency of the leak standard.

Inventors:
 [1];  [1];  [1]
  1. (Oak Ridge, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
864285
Patent Number(s):
4343176
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
long-life; leak; standard; assembly; directed; portable; capable; providing; stream; high-purity; reference; gas; virtually; constant; flow; rate; extensive; period; time; comprises; pressure; reservoir; coupled; metal; valve; valve-controlled; conduit; reproducible; useful; provided; tube; crimped; selected; loading; forming; orifice; sufficient; size; provide; formed; baked-out; vacuum; furnace; rid; attendent; components; volatile; impurities; reduce; efficiency; reference gas; vacuum furnace; assembly comprises; flow rate; valve assembly; metal tube; selected pressure; leak standard; pressure loading; constant flow; standard assembly; valve useful; metal leak; /73/

Citation Formats

Basford, James A., Mathis, John E., and Wright, Harlan C. Long-life leak standard assembly. United States: N. p., 1982. Web.
Basford, James A., Mathis, John E., & Wright, Harlan C. Long-life leak standard assembly. United States.
Basford, James A., Mathis, John E., and Wright, Harlan C. Fri . "Long-life leak standard assembly". United States. https://www.osti.gov/servlets/purl/864285.
@article{osti_864285,
title = {Long-life leak standard assembly},
author = {Basford, James A. and Mathis, John E. and Wright, Harlan C.},
abstractNote = {The present invention is directed to a portable leak standard assembly which is capable of providing a stream of high-purity reference gas at a virtually constant flow rate over an extensive period of time. The leak assembly comprises a high pressure reservoir coupled to a metal leak valve through a valve-controlled conduit. A reproducible leak valve useful in this assembly is provided by a metal tube crimped with a selected pressure loading for forming an orifice in the tube with this orifice being of a sufficient size to provide the selected flow rate. The leak valve assembly is formed of metal so that it can be "baked-out" in a vacuum furnace to rid the reservoir and attendent components of volatile impurities which reduce the efficiency of the leak standard.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

Patent:

Save / Share: