US Patent No: 5,268,092

Number of patents in Portfolio can not be more than 2000

Two water control system using oxidation reduction potential sensing

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Abstract

An automatic control system for maintaining the quality of water in a cooling tower utilizes a probe which senses the oxygen reduction potential (ORP) of the water for activating a chemical supply means, in accordance with a pre-established ORP measurement, to maintain the ORP of the cooling tower water between lower and upper limits. A second sensing probe measures the conductivity (in MHos) of the water as a factor of the total dissolved solids (TDS) to control the bleed-off or blow-down of the water. The chemicals, which are supplied for maintaining the ORP, permit significantly higher total dissolved solids in the water than with standard cooling tower systems, without the buildup of scale. As a consequence, water consumption is significantly reduced; and the system functions automatically, without requiring periodic visual inspection, water analysis or manual operation.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
H.E.R.C. PRODUCTS INCORPORATEDPHOENIX, AZ18

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eden, Todd R Scottsdale, AZ 4 76

Cited Art

Patent Info (Count) # Cites Year
 
BETZ ENTEC, INC. (1)
4,464,315 Indexing controller system and method of automatic control of cooling water tower systems 24 1982
 
KLENZOID, INC. (1)
4,931,187 Cooling tower system 34 1989
 
MOLECULAR DEVICES CORPORATION (1)
4,963,815 Photoresponsive electrode for determination of redox potential 97 1987
 
MONSANTO COMPANY (1)
5,218,304 Electronic pH and ORP indicator 16 1992
 
NALCO CHEMICAL COMPANY (1)
4,420,463 Dry chemical feed system 11 1982
 
WINDMOLLER & HOLSCHER (1)
5,507,229 Printing press 4 1994
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (4)
4,306,967 Cooling tower basin water treating apparatus 20 1980
4,752,740 Electronic water chemistry analysis device with linear bargraph readouts 30 1986
4,767,511 Chlorination and pH control system 59 1987
4,836,239 Water cooling tower and water level control system therefor 18 1988

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
NALCO COMPANY (7)
7,635,449 Method of inhibiting corrosion in hot water systems 1 2006
7,666,312 Method of inhibiting corrosion in industrial hot water systems by monitoring and controlling oxidant/reductant feed through a nonlinear control algorithm 1 2007
8,153,057 Method and device for preventing corrosion in hot water systems 0 2007
7,998,352 Method and device for cleanup and deposit removal from internal hot water system surfaces 0 2007
7,951,298 Method and device for preventing corrosion in hot water systems undergoing intermittent operations 0 2007
8,068,033 Method of detecting contamination in industrial process boiler systems 0 2008
8,130,106 Method of detecting sugar in industrial process boiler systems 0 2009
 
DYMAS FUNDING COMPANY, LLC (2)
6,270,680 Amperometric sensor probe for an automatic halogen control system 28 1998
6,238,555 Amperometric halogen control system 26 1998
 
IDEX HEALTH & SCIENCE LLC (2)
7,544,289 Dosing engine and cartridge apparatus for liquid dispensing and method 2 2004
8,431,020 Dosing engine and cartridge apparatus for liquid dispensing and method 0 2009
 
AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH (1)
5,714,058 Apparatus for accelerating revival of environment 0 1995
 
ALBEMARLE CORPORATION (1)
6,749,758 Methods and systems for uniform-control of bromine concentrations in water 4 2001
 
ARGAD-EYAL LTD. (1)
6,733,654 Water treatment method and apparatus 11 2000
 
BETZ LABORATORIES, INC. (1)
5,525,241 Solid halogen feed system 34 1995
 
BETZDEARBORN INC. (1)
6,077,445 Method to minimize corrosion in aqueous systems 9 1998
 
CHLOR RID INTERNATIONAL, INC. (1)
5,609,692 Method of removing chloride ion or a compound thereof from a surface contaminated therewith 3 1994
 
GRAFTECH INC. (1)
6,841,387 Ex-situ PEM fuel cell testing: towards visualizing gas diffusion 0 2002
 
GRAFTECH INTERNATIONAL HOLDINGS INC. (1)
7,393,442 Ex-situ PEM fuel cell testing: towards visualizing gas diffusion 0 2004
 
LIFE TECHNOLOGIES, INC. (1)
5,945,830 Flow through fluid pH and conductivity sensor 4 1997
 
MARY C. MARTIS (1)
5,733,456 Environmental control for biological nutrient removal in water/wastewater treatment 58 1997
 
NEC CORPORATION (1)
5,578,193 Method and apparatus for wet treatment of solid surfaces 33 1995
 
ROSEWOOD EQUITY HOLDINGS, LLC (1)
5,332,494 Water control system using oxidation reduction potential sensing 29 1993
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,942,118 Method and arrangement for decomposing organic waste water pollutants 5 1997