# US 7,743,646 B2 · Axial flow scan testable filter system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,743,646 B2 - Document ID: US7743646B2 - Status: Granted - Kind: B2 - Application number: 11/691,919 - Filed: 2007-03-27 - Published: 2008-10-02 - Granted: 2010-06-29 - Earliest claimed: 2004-09-13 - Assignees: Camfil Farr, Inc. - Inventors: Thomas C. Morse; Mark Huza - Web page: https://patentgrep.com/patent/US7743646B2 ## CPC - B01D 46/0086: {Filter condition indicators} - B01D 46/0091: {Including arrangements for environmental or personal protection} - B01D 46/0098: {Protecting coverages on the filter which is removed before the filter is used, protection of filter, packaging} - B01D 46/442: {by measuring the concentration of particles} - B01D 46/444: {by flow measuring} - B01D 46/446: {by pressure measuring} - B01D 2265/028: Snap, latch or clip connecting means - B01D 2273/18: Testing of filters, filter elements, sealings - G01N 15/0625: {Optical scan of the deposits} - G01N 2015/084: {Testing filters} - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract A filter system having in-situ scan capabilities is provided. In one embodiment of the invention, the system includes a downstream probe which may be rotated to scan the field of a filter installed in the system. The probe may be utilized for leak detection, velocity measurements, efficiency testing and the like. In one embodiment, one or more probes are rotated downstream of the filter to scan the downstream face of the filter. ## Claims ### Claim 1 A filter system, comprising; a filter housing; a scan test housing coupled to the filter housing; a probe suitable for leak testing disposed in the scan test housing; and a mechanism for moving the probe in a rotational motion about a centerline of the filter housing while maintaining the probe in a radial orientation relative to the centerline. ### Claim 2 (depends on 1) The filter system of claim 1, wherein the mechanism for moving the probe further comprises: an actuator disposed in the scan test housing and coupled to the probe. ### Claim 3 (depends on 2) The filter system of claim 2, wherein the actuator is a motor. ### Claim 4 (depends on 2) The filter system of claim 2, wherein the actuator is a rotary cable. ### Claim 5 (depends on 2) The filter system of claim 2, wherein the actuator is a gear mechanism. ### Claim 6 (depends on 5) The filter system of claim 5, wherein the gear mechanism further comprises: a power transmission member coupled to the gear mechanism; and an aperture formed through the scan test housing adapted to facilitate selective rotation of the power transmission member from an exterior of the scan test housing without leakage from the system. ### Claim 7 (depends on 1) The filter system of claim 1, further comprising a bag-in, bag-out bag coupled to at least one of the filter housing or the scan test housing. ### Claim 8 (depends on 1) The filter system of claim 1, further comprising a filter element sealed to the filter housing thereby forming an exterior pressure boundary with the filter housing and the scan test housing. ### Claim 9 (depends on 1) The filter system of claim 1, wherein the filter housing has a circular cross section. ### Claim 10 A method of scanning a filter, comprising: flowing air through the filter; moving a probe in a rotational direction about a centerline of the filter while maintaining the probe in a radial orientation relative to the centerline to scan the filter; and testing the filter using samples obtained while moving the probe. ### Claim 11 (depends on 10) The method of claim 10, further comprising controlling the moving of the probe without opening a pressure boundary of a containment system in which the filter is mounted. ### Claim 12 (depends on 11) The method of claim 11, further comprising rotating a shaft extending through an aperture formed through the pressure boundary and thereby controlling the moving. ### Claim 13 (depends on 10) The method of claim 10, wherein the testing further comprises detecting a filter leak. ### Claim 14 (depends on 10) The method of claim 10, wherein the testing further comprises detecting a face velocity. ### Claim 15 (depends on 10) The method of claim 10, wherein moving the probe further comprises: maintaining the probe in a radial orientation. ### Claim 16 (depends on 10) The method of claim 10, wherein the filter has a circular cross section. ### Claim 17 A filter system, comprising; an upstream duct housing; a filter housing coupled to the upstream duct housing; a scan test housing coupled to the filter housing; a probe suitable for leak testing disposed in the scan test housing; and a mechanism for rotating the probe in a circle that scans an entire face of a filter disposed in the filter housing without opening the scan test housing, wherein the probe is maintained in a radial orientation relative to a centerline of the filter housing. ### Claim 18 (depends on 17) The filter system of claim 17, wherein the mechanism for moving the probe further comprises: an actuator disposed in the scan test housing and coupled to the probe. ### Claim 19 (depends on 18) The filter system of claim 18, wherein the actuator is a motor. ### Claim 20 (depends on 18) The filter system of claim 18, wherein the actuator is a rotary cable. ### Claim 21 (depends on 18) The filter system of claim 18, wherein the actuator is a gear mechanism. ### Claim 22 (depends on 21) The filter system of claim 21, wherein the gear mechanism further comprises: a power transmission member coupled to the gear mechanism; and an aperture formed through the scan test housing adapted to facilitate selective rotation of the power transmission member from an exterior of the scan test housing without leakage from the system. ### Claim 23 (depends on 17) The filter system of claim 17, further comprising a filter element sealed to the filter housing thereby forming an exterior pressure boundary with the filter housing, the scan test housing and the upstream duct housing.