Drain safety and pump control device

Details Drain safety and pump control device Drain safety and pump control device

2011-04-26

2011-04-26

Freay, Charles G (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

C417S036000, C417S306000, C700S282000

Reexamination Certificate

active

07931447

ABSTRACT:
A drain protection device and pump controller for pools, spas, fountains and other fluid containment and circulation systems has a vacuum sensor for sensing a level of vacuum present in the suction conduit leading to the pump(s). The vacuum level is monitored by a computer that controls a vent valve that can vent to atmosphere to reduce the vacuum exerted at a drain. In applications with a flooded pump, e.g., above-ground pools, the vent valve may control the discharge of an accumulator that injects fluid pressurized by the return line into the suction conduit to reduce the vacuum therein. The computer also controls the pump(s) present in the circulation system, viz., turns them off to relieve vacuum when a drain is occluded and also runs them at the selected speed based upon a schedule. The vacuum criteria for vacuum reduction may include progressively sensitive values, some of which may be empirically based. Vacuum criteria may be maintained based upon the operational state of the circulation system, e.g., priming, stabilized running or cleaning. Low vacuum limits protect the pump(s) from dry running. A clogged vacuum conduit leading to the vacuum sensor is sensed based upon the presence of vacuum levels that are atypically constant and error processing invoked.

REFERENCES:
patent: 2096595 (1937-10-01), Sanford
patent: 2250021 (1941-07-01), Hofer
patent: 2572263 (1951-10-01), Hofer
patent: 2603234 (1952-07-01), Hofer
patent: 2644400 (1953-07-01), Hofer
patent: 2680168 (1954-06-01), Murphy
patent: 2767277 (1956-10-01), Wirth
patent: 2889779 (1959-06-01), Hofer
patent: 3145724 (1964-08-01), Pelzer
patent: 3195556 (1965-07-01), Norstrud et al.
patent: 3252479 (1966-05-01), Klock, Jr.
patent: 3781925 (1974-01-01), Curtis et al.
patent: 3957395 (1976-05-01), Ensign
patent: 3966358 (1976-06-01), Heimes et al.
patent: 4107492 (1978-08-01), Moon, Jr. et al.
patent: 4115878 (1978-09-01), Johnson et al.
patent: 4116577 (1978-09-01), Lauck
patent: 4180374 (1979-12-01), Bristow
patent: 4278403 (1981-07-01), Shafer
patent: 4322297 (1982-03-01), Bajka
patent: 4329120 (1982-05-01), Walters
patent: 4402094 (1983-09-01), Sanders
patent: 4424438 (1984-01-01), Antelman et al.
patent: 4444546 (1984-04-01), Pazemenas
patent: 4456432 (1984-06-01), Mannino
patent: 4505643 (1985-03-01), Millis et al.
patent: 4525125 (1985-06-01), Matsumtot et al.
patent: 4556807 (1985-12-01), Yamada et al.
patent: 4558238 (1985-12-01), Yamada et al.
patent: 4602391 (1986-07-01), Sheperd
patent: 4616215 (1986-10-01), Maddalena
patent: 4620835 (1986-11-01), Belll
patent: 4659235 (1987-04-01), Gilmore, Jr. et al.
patent: 4663613 (1987-05-01), Raleigh et al.
patent: 4676914 (1987-06-01), Mills et al.
patent: 4686439 (1987-08-01), Cunningham et al.
patent: 4724074 (1988-02-01), Schaupp
patent: 4742456 (1988-05-01), Kamena
patent: 4749377 (1988-06-01), Mendizabal et al.
patent: 4781536 (1988-11-01), Hicks
patent: 4797958 (1989-01-01), Guzzini
patent: 4799048 (1989-01-01), Goshima et al.
patent: 4861231 (1989-08-01), Howard
patent: 4867645 (1989-09-01), Foster
patent: 4913625 (1990-04-01), Gerlowski
patent: 5006044 (1991-04-01), Walker, Sr. et al.
patent: 5064347 (1991-11-01), La Valley, Sr.
patent: 5076761 (1991-12-01), Krohn et al.
patent: 5076763 (1991-12-01), Anastos et al.
patent: 5120198 (1992-06-01), Clark
patent: 5146943 (1992-09-01), Bert
patent: 5167041 (1992-12-01), Burkitt, III
patent: 5190442 (1993-03-01), Jorritsma
patent: 5221189 (1993-06-01), Henningsen
patent: 5240379 (1993-08-01), Takashi et al.
patent: 5244351 (1993-09-01), Arnette
patent: 5259733 (1993-11-01), Gigliotti et al.
patent: 5278455 (1994-01-01), Hamos
patent: 5347664 (1994-09-01), Hamza et al.
patent: 5361215 (1994-11-01), Tompkins et al.
patent: 5365964 (1994-11-01), Sorensen
patent: 5410150 (1995-04-01), Teron et al.
patent: 5415221 (1995-05-01), Zakryk
patent: 5422014 (1995-06-01), Allen et al.
patent: 5464327 (1995-11-01), Horwitz
patent: 5475619 (1995-12-01), Sugano et al.
patent: 5499406 (1996-03-01), Chalberg et al.
patent: 5545012 (1996-08-01), Anastos et al.
patent: 5550753 (1996-08-01), Tompkins et al.
patent: 5559720 (1996-09-01), Tompkins et al.
patent: 5570481 (1996-11-01), Mathis et al.
patent: 5580221 (1996-12-01), Triezenberg
patent: 5582509 (1996-12-01), Quilty et al.
patent: 5585025 (1996-12-01), Idland
patent: 5601413 (1997-02-01), Langley et al.
patent: 5602670 (1997-02-01), Kegan
patent: 5616239 (1997-04-01), Wendell et al.
patent: 5658131 (1997-08-01), Aoki et al.
patent: 5672049 (1997-09-01), Ciurlo
patent: 5672050 (1997-09-01), Webber et al.
patent: 5682624 (1997-11-01), Ciochetti
patent: 5682684 (1997-11-01), Wentzlaff et al.
patent: 5690476 (1997-11-01), Miller
patent: 5707211 (1998-01-01), Kochan, Sr.
patent: 5725359 (1998-03-01), Dongo et al.
patent: 5730861 (1998-03-01), Sterghos et al.
patent: 5759414 (1998-06-01), Wilkes et al.
patent: 5772403 (1998-06-01), Allison et al.
patent: 5795328 (1998-08-01), Barnitz et al.
patent: 5796184 (1998-08-01), Kuhnl et al.
patent: 5809796 (1998-09-01), Zakryk
patent: 5822807 (1998-10-01), Gallagher et al.
patent: 5846056 (1998-12-01), Dhindsa et al.
patent: 5865601 (1999-02-01), Miller
patent: 5894609 (1999-04-01), Barnett
patent: 5895565 (1999-04-01), Steininger et al.
patent: 5898958 (1999-05-01), Hall
patent: 5947689 (1999-09-01), Schick
patent: 5947700 (1999-09-01), McKain et al.
patent: 5971712 (1999-10-01), Kann
patent: 5991939 (1999-11-01), Mulvey
patent: 6003165 (1999-12-01), Loyd
patent: 6038712 (2000-03-01), Chalberg et al.
patent: 6039543 (2000-03-01), Littleton
patent: 6041801 (2000-03-01), Gray et al.
patent: 6045331 (2000-04-01), Gehm
patent: 6053193 (2000-04-01), Baker et al.
patent: 6059536 (2000-05-01), Stingl
patent: 6065941 (2000-05-01), Gray
patent: 6098648 (2000-08-01), Bertoia
patent: 6098654 (2000-08-01), Cohen et al.
patent: 6099264 (2000-08-01), Du
patent: 6123510 (2000-09-01), Greer et al.
patent: 6171073 (2001-01-01), McKain et al.
patent: 6186167 (2001-02-01), Grumstrup et al.
patent: 6227808 (2001-05-01), McDonough
patent: 6251285 (2001-06-01), Ciochetti
patent: 6253227 (2001-06-01), Tompkins et al.
patent: 6253391 (2001-07-01), Watanabe et al.
patent: 6261065 (2001-07-01), Nayak et al.
patent: 6269493 (2001-08-01), Sorensen
patent: 6273686 (2001-08-01), Kroell et al.
patent: 6295661 (2001-10-01), Bromley
patent: 6295662 (2001-10-01), Idland et al.
patent: 6341387 (2002-01-01), Zars
patent: 6342841 (2002-01-01), Stingl
patent: 6374854 (2002-04-01), Acosta
patent: 6390781 (2002-05-01), McDonough
patent: 6461113 (2002-10-01), Gaudet et al.
patent: 6468052 (2002-10-01), McKain et al.
patent: 6497554 (2002-12-01), Yang et al.
patent: 6547529 (2003-04-01), Gross
patent: 6568416 (2003-05-01), Tucker et al.
patent: 6590188 (2003-07-01), Cline et al.
patent: 6591863 (2003-07-01), Ruschell et al.
patent: 6623245 (2003-09-01), Meza et al.
patent: 6657546 (2003-12-01), Navarro et al.
patent: 6659980 (2003-12-01), Moberg et al.
patent: 6663349 (2003-12-01), Discenzo et al.
patent: 6676382 (2004-01-01), Leighton et al.
patent: 6676831 (2004-01-01), Wolfe
patent: 6687923 (2004-02-01), Dick et al.
patent: 6709241 (2004-03-01), Sabini et al.
patent: 6747367 (2004-06-01), Cline et al.
patent: 6779205 (2004-08-01), Mulvey et al.
patent: 6783328 (2004-08-01), Lucke et al.
patent: 6796776 (2004-09-01), Jolley et al.
patent: 6810915 (2004-11-01), Umetsu et al.
patent: 6939109 (2005-09-01), Takashi et al.
patent: 6957742 (2005-10-01), Pillart
patent: 6976052 (2005-12-01), Tompkins et al.
patent: 7167087 (2007-01-01), Corrington et al.
patent: 7292898 (2007-11-01), Clark et al.
patent: 2001/0041139 (2001-11-01), Sabini et al.
patent: 2002/0070611 (2002-06-01), Cline et al.
patent: 2002/0089236 (2002-07-01), Cline et al.
patent: 2002/0094277 (2002-07-01), Gaudet et al.
patent: 2002/0104158 (2002-08-01), Dick et al.
patent: 2002/0141877 (2002-10-01), Jayanth et al.
patent: 2002/0150476 (2002-10-01), Lucke et al.
patent: 2003/0006891 (2003-01-01), Wild et al.
patent: 2003/0049134 (2003-03-01), Leighton et al.
patent: 2003/0106147 (2003-06-01), Cohen et al.
patent: 2004/02

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