Imperforate bowl: centrifugal separators – With condition responsive means – For controlling outlet valve
Reexamination Certificate
2005-01-04
2005-01-04
Cooley, Charles E. (Department: 1723)
Imperforate bowl: centrifugal separators
With condition responsive means
For controlling outlet valve
C494S005000, C494S010000, C494S037000
Reexamination Certificate
active
06837842
ABSTRACT:
An indication device indicates an undesired operation condition of a centrifugal separator and comprises an inlet valve situated in a supply conduit to the separator, and an outlet valve situated in an outlet conduit from the separator. During normal operation of the separator the valves are adjusted in open normal valve positions for passing normal flows through the supply and outlet conduits. A control unit is adapted to activate a signal generator to generate an error signal in response to a pressure sensor if the pressure sensor during a predetermined period of time during operation of the separator senses a course of pressure change in the outlet conduit different from an expected normal course of pressure change, when the inlet and outlet valves during predetermined period of time are adjusted in valve positions which at least substantially decreases the flows in the supply and outlet conduits from the normal flows.
REFERENCES:
patent: 3167509 (1965-01-01), Steinacker
patent: 3396910 (1968-08-01), Steinacker
patent: 3445061 (1969-05-01), Nilson
patent: 3580493 (1971-05-01), Jonsson
patent: 3593915 (1971-07-01), Steinacker
patent: 3637134 (1972-01-01), Nelson
patent: 3642196 (1972-02-01), Nilsson
patent: 3938734 (1976-02-01), Wilke
patent: 3976242 (1976-08-01), Hemfort
patent: 4151950 (1979-05-01), Gunnewig
patent: 4206871 (1980-06-01), Nilsson
patent: 4305817 (1981-12-01), Kohlstette
patent: 4410318 (1983-10-01), Björk et al.
patent: 4820256 (1989-04-01), Nordstrom
patent: 4840612 (1989-06-01), Pallmar
patent: 5800330 (1998-09-01), Modeer
patent: 6080098 (2000-06-01), Borgstrom et al.
patent: 6358193 (2002-03-01), Nyberg
patent: 4242526 (1994-02-01), None
patent: 10-272383 (1998-10-01), None
patent: 409 662 (1979-09-01), None
Alfa Laval AB
Cooley Charles E.
McCormick Paulding & Huber LLP
LandOfFree
Method and device for indicating an undesired operation... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for indicating an undesired operation..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for indicating an undesired operation... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3367016