Quick-change filter cartridge

Patent · Sun Jan 01 00:00:00 EST 1995

OSTI ID:869822

Rodgers, John C ^[1]; McFarland, Andrew R ^[2]; Ortiz, Carlos A ^[3]

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1. Santa Fe, NM
2. College Station, TX
3. Bryan, TX

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 may be trapped for investigation, the latter downstream of the aerosol filter.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: Regents of Univ. of California Office of Technology Transfer (Alameda, CA)
• Patent Number(s): US 5404762
• OSTI ID: 869822
• Country of Publication: United States
• Language: English

Related Subjects

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
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