Liquid purification or separation – Flow – fluid pressure or material level – responsive – Discharge of treated material
Patent
1982-09-17
1984-06-12
Adee, John
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Discharge of treated material
210440, 2104941, B01D 2704
Patent
active
044540361
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
This invention relates to an oil filter provided with a filter element formed by wrapping many times a thin sheet of filter paper about a core member.
BACKGROUND ART
Generally, in a motor car engine, an oil filter is included in a lubricating system for removing such impurities as worn out metal particles, carbon, etc. However, there is a limit for the filtering ability of the oil filter so that it has been necessary to exchange it at each run of 2,500-3,000 km for ordinary oil and to exchange the filter element at each run of 5,000-6,000 km. More particulary, a conventional filter element has adopted a system in which oil is passed substantially in the direction of the thickness of a single sheet of filter paper so that it is liable to result in clogging. Further, it has been quite impossible to arrest fine particles of carbon, ash component, worn out metal powders or the like of less than 10 microns, particularly water component.
As above described, to discard still substantially usuable lubricating oil merely due to the filtering capability of the oil filter not only contradicts resource saving but also these is a fear of causing a secondary public hazard and a solution of this has been desired. Consequently, it has been considered to use a filter element having a high filtering capability, but when such element is used, the cost generally increases. Furthermore, there is a defect that the size of the oil filter itself becomes large.
Accordingly, in recent years, it has been proposed a filter utilizing a so-called tissue element, that is a filter element prepared by wrapping many times a thin sheet of filter paper about a core body. With this oil filter, although a capability of filtering said fine particles and water component entrained into the oil can be fully expected there are such defects that the filtering efficiency is not high and that the construction is complicated, thus increasing the manufacturing cost. Namely, since the construction is such that the oil passes in the axial direction of the element (a direction parallel to the surface of the wrapped paper) there is a limit for the filtered flow quantity, that since the end surface acting as the inlet side of the oil is narrow when the arrested particles deposit on the surface, filtered flow quantity decreases greatly, and that since the element is tightly fitted in a casing it is necessary to use a special value.
DISCLOSURE OF THE INVENTION
Accordingly, the principal object of this invention is to provide an oil filter capable of maintaining the filtering capability over a longer period than the prior art.
Another object of this invention is to provide an oil filter capable of improving the filtering efficiency over the prior art.
Still another object of this invention is to provide an oil filter capable of not only accomplishing the objects described above but also can be manufactured at a relatively low cost and having a simple construction in the same manner as the prior art.
To accomplish these objects, according to this invention a first oil passage is formed at one end side and the periphery of a paper roll shaped filter element made of a thin sheet of paper, and second oil passage is formed on the other end side.
Accordingly, according to one embodiment of this invention, in an oil filter including a filter element formed by wrapping many times a sheet of thin filter paper about a core member, there is provided an oil filter, characterized by comprising a bottomed cylindrical casing, a base member closing the opening of the casing and having an oil inlet opening and an oil outlet opening and means for separating first and second oil passages, the means connecting one end and the periphery of the filter element to the first oil passage connected to the oil inlet opening and to the second oil passage containing the other end of the filter element.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded perspective view showing one embodiment of the oil filter according to this invention;
FIG. 2 is a longitudi
REFERENCES:
patent: 2110009 (1938-03-01), Weidenbacker
patent: 2537898 (1951-01-01), Hunter et al.
patent: 2738879 (1956-03-01), Franz
patent: 3504803 (1970-04-01), Brayman
patent: 4028243 (1977-06-01), Offer et al.
patent: 4324660 (1982-04-01), Peyton et al.
Adee John
Pfund Charles E.
Shinwa Ltd.
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