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Title: Quick-change filter cartridge

A quick-change filter cartridge. In sampling systems for measurement of airborne materials, a filter element is introduced into the sampled airstream such that the aerosol constituents are removed and deposited on the filter. Fragile sampling media often require support in order to prevent rupture during sampling, and careful mounting and sealing to prevent misalignment, tearing, or creasing which would allow the sampled air to bypass the filter. Additionally, handling of filter elements may introduce cross-contamination or exposure of operators to toxic materials. Moreover, it is desirable to enable the preloading of filter media into quick-change cartridges in clean laboratory environments, thereby simplifying and expediting the filter-changing process in the field. The quick-change filter cartridge of the present invention permits the application of a variety of filter media in many types of instruments and may also be used in automated systems. The cartridge includes a base through which a vacuum can be applied to draw air through the filter medium which is located on a porous filter support and held there by means of a cap which forms an airtight seal with the base. The base is also adapted for receiving absorbing media so that both particulates and gas-phase samples maymore » be trapped for investigation, the latter downstream of the aerosol filter.« less
Inventors:
 [1];  [2];  [3]
  1. (Santa Fe, NM)
  2. (College Station, TX)
  3. (Bryan, TX)
Issue Date:
OSTI Identifier:
869822
Assignee:
Regents of Univ. of California Office of Technology Transfer (Alameda, CA) LANL
Patent Number(s):
US 5404762
Contract Number:
W-7405-ENG-36
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
quick-change; filter; cartridge; sampling; systems; measurement; airborne; materials; element; introduced; sampled; airstream; aerosol; constituents; removed; deposited; fragile; media; require; support; prevent; rupture; careful; mounting; sealing; misalignment; tearing; creasing; allow; air; bypass; additionally; handling; elements; introduce; cross-contamination; exposure; operators; toxic; moreover; desirable; enable; preloading; cartridges; clean; laboratory; environments; simplifying; expediting; filter-changing; process; field; permits; application; variety; types; instruments; automated; base; vacuum; applied; draw; medium; located; porous; held; means; cap; forms; airtight; seal; adapted; receiving; absorbing; particulates; gas-phase; samples; trapped; investigation; latter; downstream; toxic materials; sampled air; filter elements; filter media; filter element; filter medium; porous filter; filter cartridge; quick-change filter; tight seal; sampling systems; draw air; /73/

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