Liquid purification or separation – Magnetic
Reexamination Certificate
2002-06-11
2003-11-04
Reifsnyder, David A. (Department: 1723)
Liquid purification or separation
Magnetic
C335S303000
Reexamination Certificate
active
06641725
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a method and apparatus for magnetic treatment of fluids. A considerable amount of study and development has been conducted indicating empirically that magnetically treated fluids, such as water, contribute effectively to the prevention, loosening, and removal of crust and scale from the inner surfaces of conduits, tanks, and the like. It has been found that exposure of fluids to predominantly south pole magnetic fields are particularly effective in reducing crust and scale buildup on conduit walls.
Prior art devices for accomplishing this fluid or liquid treatment have used plural horseshoe or bar magnets or the like where the magnets are adjacent to the pipe through which the fluids flow, in various pole arrangements, comprising a casing or plate to which the magnets are attached so they can be attached to a conduit. It has been found that a flexible magnetic device, that does not require plural bar magnets attached to a casing or plate to be attached to a conduit, can provide fluid treatment at a much-reduced cost.
It has also been found that flexible magnets, especially high strength flexible magnets with a gauss rating of 2,000 or more are very effective in the treatment of fluids, especially of smaller conduits. A flexible magnet can be sized to provide a larger surface area, to provide a larger magnetic field, to be a very effective fluid treatment device, and at a very low cost. A flexible magnet can be wrapped several times around a conduit to increase the magnetic field strength. A flexible magnet is faster and easier to install, especially when provided with an adhesive backing. A flexible magnet wrapped completely around the circumference of a conduit provides a more uniform magnetic field than with any other type of magnet, further increasing the effectiveness of the device. Therefore, it would be exceedingly advantageous to magnetically treat fluids in a more efficient and economical manner than has been done previously. These and other objects and features of the present invention will become more apparent from the following description taken together with the accompanying drawings.
DESCRIPTION OF THE PRIOR ART
Applicant is aware of the following U.S. Pat. Nos. concerning magnetic fluid treatment.
Vermeiren U.S. Pat. No. 2,652,925 teaches a treatment device which produces a magnetic field and a passage for the liquid to be treated.
Menold U.S. Pat. No. 4,265,754 provides an apparatus for treating fresh water by producing a magnetic field in proximity to a flow of water within a water conduit.
Zimmerman U.S. Pat. No. 4,265,755 provides a magnetic water treating device within a conduit. This device provides easy assembly without adversely affecting the ultimate functional capability of the overall unit.
Schiesser U.S. Pat. No. 4,265,756 provides a change device for sieves used for filtering plastic materials. The sieves can be changed with this device without interrupting the transport of the material which is being processed. Kulish U.S. Pat. No. 4,605,496 provides a device for magnetic treatment of liquids by concentrating magnetic fields on the liquids to provide descaling and deliming.
Weisenbarger U.S. Pat. No. 4,711,271 provides a magnetic fluid conditioner for abating the adherence of precipitates in conduits transmitting a variety of fluids which contain unwanted compounds which will precipitate and adhere to the inner walls of the conduits.
Walsh U.S. Pat. No. 4,836,932 provides a method for the fabrication and use in modifying the physicochemical properties of water. This device uses fine particle super ferromagnets or super paramagnets dispersed in nonmagnetic media.
McGrath U.S. Pat. No. 5,024,759 provides a device for magnetically treating a flowing fluid. This device uses a magnetic structure comprising the plurality of magnets made from rare earth materials and are arranged around the inside surface of a ring and with the north poles of the magnets facing inwardly.
Holcomb U.S. Pat. No. 5,113,751 provides water treatment by using magnetic treatment or electromagnetic treatment by direct injection in the fluid stream or a combination of such water treatment systems. Note Column 3, lines 33-48, regarding the magnet orientations.
Spiegel U.S. Pat. No 5,200,071 provides a fluid treatment system for changing the rates of growth of certain crystals formed within a fluid. This device has a variable speed motor and a wheel assembly mounted on the shaft. An array of magnets is concentrically arranged in a circular pattern about the shaft on the inner surface of each of the disks wherein sufficient magnetic force is provided to accomplish beneficial effects on impurities of the fluid.
Clair U.S. Pat. No. 5,227,683 provides a permanent magnet fluid generator with powerfull magnetic field condensers which utilize neodymium magnets to magnetically saturate steel pole pieces. In this device, the fluid generates an electrical current that can be utilized to protect the pipe from scale and corrosion.
Curtis U.S. Pat. No. 5,238,558 teaches a magneto-hydrodynamic system and method for the treatment of pipes and the fluid carried in the pipes to prevent scaling and build-up of deposits. In this device, a pipe for carrying fluid and four magnets are utilized, with each magnet having a magnetic field density of about 6,700 gauss, end pole pieces on each end of the magnet units and a top pole piece covering the surface of the magnets on a side of the magnets opposite the side in contact with the pipe to be treated.
Ellison U.S. Pat. No. 5,296,141 provides a magnetic device for treating fluid flowing through a conduit. Permanent magnets are utilized and a mass of non-ferromagnetic filler material in the interior compartment encapsulates the magnets.
Schoepe U.S. Pat. No. 5,378,362 provides a system for treating water to reduce calcium carbonate deposits. Pairs of magnets are utilized to facilitate changing of the spacing between adjacent magnets.
Glass U.S. Pat. No. 6,056,872 provides a device for the magnetic treatment of fluids. The device includes a plurality of magnets for imparting a magnetic field is arranged peripherally about a pipe.
Paterson U.S. Pat. No. 6,171,504 provides a magnetic water or fluid treatment system consisting of strong magnets arranged in a specific spacial and polar orientation to form a treating device for mounting on fluid-carrying pipes.
SUMMARY OF THE INVENTION
It is therefore an object of the invention to magnetically treat fluids in a more efficient and economical manner than has been done previously.
It is a further object of the invention to magnetically treat fluids in order to impart properties to the fluid which effectively contribute to descaling and the like by passing them through a magnetically oriented field which is either a predominantly south pole or predominantly north pole field.
Another object of the invention is to magnetically treat fluids by passing them through a magnetic field which has multiple south and north fields.
The preferred embodiment of the invention generally comprises a flexible magnet wrapped 1 or more times around and circumference of a conduit through which a fluid is passed. The flexible magnet arranged on the outside surface of the conduit in such a manner that the south pole is directed radially inwardly toward the central axis of the conduit and the north pole is directed radially outward away from the central axis in order to concentrate the south pole magnetic field more strongly upon the fluid. A means of holding said flexible magnet in place such as adhesive backing, plastic wire ties, tape, or other methods.
In an alternate embodiment, the orientation of the poles has been reversed such that the liquid is subjected to predominantly the north pole magnetic field. In yet another embodiment, the flexible magnet having multiple south and north poles directed generally radially toward the central axis and multiple south and north poles directed generally away from said central axis.
Another embodiment of the invention generally comprises a flexib
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