Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Position or extent of motion
Reexamination Certificate
2008-09-22
2010-02-09
Drodge, Joseph W (Department: 1797)
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Position or extent of motion
C055S490000, C210S232000, C210S443000, C210S450000, C070S021000, C070S077000
Reexamination Certificate
active
07658840
ABSTRACT:
A locking liquid filter assembly is disclosed that prevents an unauthorized user from removing the filter media cartridge after installation. The locking filter assembly includes a head unit for coupling with an inlet conduit for delivering unfiltered process liquid into the filter assembly and an outlet conduit for delivering filtered process liquid from the filter, a head portion that includes a manifold for communicating with the inlet conduit and with the outlet conduit, and a locking assembly coupled to the head portion configured such that when the filter media cartridge is fully engaged with the head portion, the locking assembly engages with the filter media cartridge to prevent filter media removal.
REFERENCES:
patent: 1910646 (1933-05-01), Starks
patent: 3217941 (1965-11-01), Fishburne
patent: 3237770 (1966-03-01), Humbert, Jr.
patent: 4804467 (1989-02-01), Losos
patent: 7186337 (2007-03-01), Reid
patent: 2002/0125183 (2002-09-01), Chaney et al.
patent: 2004/0074827 (2004-04-01), Sann et al.
patent: 2006/0151364 (2006-07-01), Hacker
Bachman & LaPointe P.C.
Drodge Joseph W
LandOfFree
Locking filter assembly has received 1 rating(s) and 1 review(s), resulting in an average rating of 4.70 on a scale from 1 to 5. The overall rating for this patent is excellent.
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rocky
this is a great idea. with terrorism, vandalism, and other malicious acts happening around the globe this is a needed product.
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