Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Reexamination Certificate
2005-01-21
2008-12-30
Cecil, Terry K (Department: 1797)
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
C116S268000, C116S270000, C116SDIG025, C055SDIG034, C096S421000
Reexamination Certificate
active
07470360
ABSTRACT:
An indicator suitable for signaling restricted flow of a fluid through a filter mounted in a filter assembly includes a housing having an inner cavity. A diaphragm disposed within the housing separates the inner cavity into first and second chambers and deflects from a neutral position in response to applied pressures within the first and second chambers. A tab assembly opposite the diaphragm includes a spring-loaded flag moveable from a first position within the housing to a second position outside the housing. A pin operably coupled to the diaphragm holds the spring-loaded flag within the housing when the diaphragm is in the neutral position. In response to the diaphragm being deflected sufficiently from the neutral position to release the pin, the spring-loaded flag travels to the second position outside the housing, thereby indicating a restricted flow condition for the filter.
REFERENCES:
patent: 3011470 (1961-12-01), Stoermer
patent: 3027865 (1962-04-01), Kautz et al.
patent: 3066527 (1962-12-01), Stein
patent: 3119367 (1964-01-01), Barnes, Jr. et al.
patent: 3312187 (1967-04-01), McKinlay
patent: 3381651 (1968-05-01), McKinlay
patent: 3388682 (1968-06-01), Whiting
patent: 3487929 (1970-01-01), Sample et al.
patent: 3639998 (1972-02-01), Mason
patent: 3686835 (1972-08-01), Strange et al.
patent: 3916817 (1975-11-01), Kemp
patent: 4033733 (1977-07-01), Nelson
patent: 4162660 (1979-07-01), Albertson et al.
patent: 4369728 (1983-01-01), Nelson
patent: 4445456 (1984-05-01), Nelson
patent: 4620500 (1986-11-01), Condon
patent: 4688511 (1987-08-01), Gerlach et al.
patent: 4726823 (1988-02-01), Brice
patent: 5616157 (1997-04-01), Mead et al.
patent: 5845597 (1998-12-01), Karpal
patent: 5850183 (1998-12-01), Berry, III
patent: 6161417 (2000-12-01), Nepsund
patent: 6327902 (2001-12-01), Berry, III et al.
patent: 6604486 (2003-08-01), Krisko et al.
patent: 7137303 (2006-11-01), Janik et al.
patent: 10315052 (2003-12-01), None
patent: 229893 (1987-07-01), None
patent: 2259637 (1975-08-01), None
patent: 0929085 (1963-06-01), None
patent: WO-2006/079067 (2006-07-01), None
“International Search Report for corresponding PCT Application No. PCT/US2006/002440”, (Jun. 2, 2006), 3 pgs.
“Written Opinion of the International Searching Authority for PCT Application No. PCT/US2006/002440”, (Jun. 2, 2006), 4 pgs.
International Application Serial No. PCT/US2006/002440, International Preliminary Report on Patentability mailed May 2, 2008, 6 pgs.
Berry, III Charles Henry
Hammerand H Dianne
Cecil Terry K
Engineered Products Company
Schwegman Lundberg & Woessner, P.A.
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