Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Reexamination Certificate
2005-08-24
2009-12-01
Kramer, Devon C (Department: 3746)
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
C417S044100, C417S360000
Reexamination Certificate
active
07625187
ABSTRACT:
In accordance with one embodiment of the present invention, there is provided a submersible pump that includes a pump housing forming a main compartment for receiving a pump impeller and having liquid entrance and exit openings in said main compartment, and an impeller mounted in the main compartment. The pump housing is adapted for submersion in a body of liquid whose level is to be controlled, and a sealed auxiliary compartment is formed as an integral part of the housing and located to be at least partially submerged in the liquid body. A drive motor is coupled to the impeller for rotating the impeller to eject liquid from the main compartment through the exit opening. An electric-field sensor is mounted in the sealed auxiliary compartment for detecting the elevation of the surface of the liquid body adjacent the sealed auxiliary compartment. At least one controllable switch is connected in the power supply line for controlling the supply of power to the drive motor, and the electric-field sensor is connected to the controllable switch for opening and closing the switch in response to changes in the detected elevation of the surface of the liquid body adjacent the outer surface of the sealed auxiliary compartment.
REFERENCES:
patent: 3715539 (1973-02-01), Silberg et al.
patent: 4749988 (1988-06-01), Berman et al.
patent: 4870292 (1989-09-01), Alpert et al.
patent: 5257911 (1993-11-01), Mota et al.
patent: 5425624 (1995-06-01), Williams
patent: 5594222 (1997-01-01), Caldwell
patent: 6164132 (2000-12-01), Matulek
patent: 6192752 (2001-02-01), Blaine
patent: 6310611 (2001-10-01), Caldwell
patent: 6320282 (2001-11-01), Caldwell
patent: 6479915 (2002-11-01), Hsueh
patent: 6538261 (2003-03-01), McConnel et al.
patent: 7264449 (2007-09-01), Harned et al.
patent: 7373817 (2008-05-01), Burdi et al.
patent: 2002/0176782 (2002-11-01), Batchelder et al.
patent: 2002/0190868 (2002-12-01), Dearborn et al.
patent: 2003/1001705 (2003-01-01), Fong
patent: 2003/0091440 (2003-05-01), Patel et al.
patent: 2004/0018094 (2004-01-01), Rossman
patent: 2004/0035471 (2004-02-01), Harwood
patent: 2004/0191090 (2004-09-01), Patel et al.
patent: 2005/0068049 (2005-03-01), Steenwyk
patent: WO 98/00643 (1998-01-01), None
patent: WO 03/042536 (2003-05-01), None
Infrared. (Mar. 30, 2008). In Wikipedia, The Free Encyclopedia. Retrieved 16:04, Mar. 31, 2008, from http://en.wikipedia.org/w/index.php?title=Infrared&oldid=201999918.
Electric field. (Mar. 31, 2008). In Wikipedia, The Free Encyclopedia. Retrieved 17:41, Mar. 31, 2008, from http://en.wikipedia.org/w/index.php?title=Electric—field&oldid=202258860.
Assessor Gerald A.
Collins Michael
Johnson Pumps of America Inc.
Kramer Devon C
Nixon & Peabody LLP
Weinstein Leonard J
LandOfFree
Submersible pump with integrated liquid level sensing and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Submersible pump with integrated liquid level sensing and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Submersible pump with integrated liquid level sensing and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4132562