Liquid purification or separation – Magnetic
Reexamination Certificate
2001-03-31
2003-01-07
Savage, Matthew O. (Department: 1723)
Liquid purification or separation
Magnetic
C210S172300, C184S006250, C184S106000, C335S305000, C335S306000
Reexamination Certificate
active
06503393
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to oil filter devices and, more particularly, to oil filter devices mounted on motor vehicles.
2. Description of the Prior Art
The use of oil filtering devices for motor vehicles is known in the prior art. In my prior patent U.S. Pat. No. 5,510,024 there is disclosed a magnet assembly or attachment for magnetically collecting metallic particles within an oil filter. That inventive device includes a pair of magnets supported in a spaced relationship by a carrier which latter is positionable along an exterior of a filter cartridge. The carrier serves the additional function of a heat sink. A shunt couples opposite poles of the magnets together to increase the magnetic flux directed into the filter cartridge to separate and retain metallic particles from the filtered fluid.
An oil lubrication circuit of a motor vehicle includes a variety of components, two of which are an oil pan and an oil pump that includes an oil intake pipe. Oil flows from the oil pan into the oil intake pipe. It is conceived by the present inventor that it would be desirable to apply magnetic treatment of the circulating oil in the vicinity of the oil intake pipe of the oil pump.
To optimize the application of magnetic fields to the vicinity of the oil intake pipe, it would be desirable to provide an element which directs the flow of oil to a prepositioned gap between the oil intake pipe and a magnetic assembly.
In addition to providing a reservoir for oil, an oil pan covers the oil intake pipe. In this respect, it would be desirable if an oil pan were provided that is combined with a magnet assembly that is positioned near the oil intake pipe.
In view of the above considerations, the present inventor discloses herein an improved combined oil pan and magnetic filter apparatus. Yet, still other features would be desirable in such combined oil pan containing and magnetic filter apparatus. For example, it would be desirable if the magnet assembly could easily be removed from the oil pan for cleaning and replaced in the oil pan after being cleaned.
Moreover, it would be desirable if an oil pan containing a magnetic filter apparatus were provided which includes a magnet unit which includes a plurality of magnets arrayed to strongly concentrate magnetic flux for attracting and retaining ferro-magnetic particles, thereby effectively separating the ferro-magnetic particles from the oil.
Thus, while the foregoing body of prior art indicates it to be well known to use a magnet assembly for aiding in the filtration of oil in a motor vehicle, the prior art described above does not teach or suggest an oil pan containing a magnetic filter apparatus which has the following combination of desirable features: (1) magnetically treats circulating oil in the vicinity of the oil intake pipe of the oil pump; (2) provides an element which directs the flow of oil to a prepositioned gap between an oil intake pipe and a magnetic assembly; (3) combines an oil pan with a magnet assembly that is positioned near the oil intake pipe; (4) provides a magnet assembly that can easily be removed from the oil pan for cleaning and replaced in the oil pan after being cleaned; and (5) provides a magnet unit having a plurality of magnets arrayed to strongly concentrate magnetic flux for attracting and retaining ferro-magnetic particles, thereby effectively separating the ferro-magnetic particles from the oil. The foregoing desired characteristics are provided by the unique oil pan containing a magnetic filter apparatus of the present invention as will be made apparent from the following description thereof. Other advantages of the present invention over the prior art also will be rendered evident.
SUMMARY OF THE INVENTION
To achieve the foregoing and other advantages, the present invention, briefly described, provides an oil pan containing a magnetic filter apparatus which includes an oil pan member which includes a magnet assembly reception channel. A magnetic filter assembly is received in the magnet assembly reception channel, and attachment means are provided for attaching the magnetic filter assembly to the oil pan member. The magnetic filter assembly separates ferro-magnetic particles from oil in the oil pan member and traps the separated particles on the magnetic filter assembly.
The magnetic filter assembly includes a magnet support unit which is attachable to the attachment means. A magnet unit is supported by the magnet support unit. The magnet unit provides a high magnetic flux region to circulating oil in the vicinity of an oil pump intake tube for trapping metal particles on the magnetic filter assembly.
More specifically, the magnetic filter assembly includes a magnet support unit and a magnet unit supported by the magnet support unit. The magnet support unit includes a support connector portion. A support riser portion is connected to the support connector portion. A magnet holding member is connected to the support riser portion. A sealing flange portion is connected to a bottom end of the support connector portion, and a first attachment ring portion is connected to the sealing flange portion. The magnet unit provides a high magnetic flux region to circulating oil in the vicinity of an oil pump intake tube, and attachment means for connecting with the support connector portion for attaching the magnetic filter assembly to the oil pan member.
The support connector portion includes external threads for engaging complimentary internal threads of the attachment means. The attachment means includes a second attachment ring placed on an inside surface of the oil pan member, and fasteners connect the second attachment ring with a portion of the oil pan member. The second attachment ring includes internal threads for engaging complimentary external threads on the support connector portion.
The magnet unit includes a magnet unit floor member. A plurality of individual magnets are connected to the magnet unit floor member. Connection means are provided for connecting the magnet unit to the magnet support unit. The connection means include a connector sleeve reception channel in the magnet unit floor member. A connector screw reception channel is in the magnet holding member. A connector screw is received in the connector screw reception channel. A connector sleeve is screwed onto the connector screw. The connector sleeve includes a pin reception channel, and a lock pin is received in the pin reception channel. The magnet unit floor member includes a central riser region which extends upward towards the magnet holding member.
The plurality of individual magnets includes a set of first bar magnets supported on the magnet unit floor member and extending longitudinally upward from the magnet unit floor member. A set of second bar magnets are supported on the magnet unit floor member and extend transversely along the magnet unit floor member. Magnet attachment screws are provided for securing the first bar magnets to the magnet unit floor member.
The first bar magnets extend upward from four comer areas of the magnet unit floor member. The first bar magnets are arrayed sequentially at the four comer areas of the magnet unit floor member with sequentially opposite magnetic polarity orientation.
The second bar magnets are arrayed sequentially at sides of the magnet unit floor member between the four comer areas of the magnet unit floor member with sequentially opposite magnetic polarity orientation. Respective polarities of the first bar magnets are arrayed with respect to opposite polarities of the second bar magnets.
In accordance with another aspect of the invention, the second bar magnets have a vertical height that is approximately equal to the cylindrical diameter of the first bar magnets, and the magnet holding member has flat top surface.
With another aspect of the invention, wherein both the connector sleeve and the connector sleeve reception channel have a square cross-section.
In accordance with yet another aspect of the invention, the magnet u
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