Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1990-09-10
1993-01-12
Savage, Matthew O.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
210136, 210186, 210232, 210239, 2103232, 210338, 210436, 210437, 210438, 210439, 210440, 210450, 210455, 2104971, B01D 2907, B01D 2956, B01D 3518
Patent
active
051787539
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an oil filter for internal combustion engines as set out in the defining portion of Patent claim 1.
Internal combustion engines are fitted with oil filters that are normally flange-mounted onto the crank case of the engine. Such oil filters remove only some of the contaminants that are contained in the oil that circulates within the engine.
DE-PS 1 051 062 describes an oil filter in which the filter element is a roll of absorbent paper, e.g., toilet paper, that is installed on a central rod. Such oil filters act as fine filters and, in addition, can be arranged in a secondary path of the engine oil lubrication system, i.e., they can be used in addition to existing oil filters. This provides for significantly improved filtering action. Because of this fine filtering action, for all practical purposes, it is unnecessary to change the engine oil, and all that needs to be done is to replace the oil that has actually been used.
The principle underlying such oil filters has been widely developed. The oil flows through the paper filter element between an inlet and an outlet, in counter-flow, as in the abovementioned pat. specification or in accordance with EP-OS 262 596, or in a radial direction, as in the filters described in DE-PS 24 60 073 and DE-GM 87 00 995. Filters constructed in a similar way are known and used for filtering, fuels, and these work on the straight-through principle, so that the fuel flows through the wound-up filter element in an axial direction; see DE-OS 36 17 420.
In order to achieve almost complete fine filtering of the oil, the volume of the filter element must be matched to the total quantity of oil circulating within the engine, to the rate of flow, and to the oil pressure. The greater these values, the greater will be the volume of the filter element. For this reason, conventional oil filters have to be produced in various sizes, in order to provide a match to engines of various sizes. This makes both production and inventory management more costly.
It is the task of the present invention to describe an oil filter of simple construction that can be produced in a simple manner in various sizes.
According to the present invention, this task has been solved by the distinguishing features set out in patent claim 1.
Accordingly, the basic idea of the present invention is to provide such an oil filter as a set made up of only a few individual parts, namely, a body section, end caps, and an extensible rod that supports a rolled filter element, it being possible to connect the body sections and the covers to form a closed filter housing.
The oil filter can operate on the straight-through principle, when the oil passes through the rolled filter element in an axial direction. In this case, the production units consist of a body section, a cover with a connector that serves as an inlet or an outlet, and an extensible rod produced, for example, from solid material, onto which the filter element is rolled. In addition, the counter-flow principle can also be used, in which the oil that is delivered to one cap first passes through the hollow rod and then through the filter element axially, in the opposite direction. In this instance, the production units are once again a wall section, one cap with an inlet and an outlet, an end cap, and a hollow rod that supports the rolled filter element. If the oil that is to be filtered is meant to flow radially through the filter element, then the hollow rod will be produced so as to incorporate the appropriate drillings.
The volume of the oil filter and the rolled filter element contained therein can be made larger very simply in that a plurality of body sections are connected to each other and a cap is used to cover off both ends. Connection of the individual parts is effected by interposing a seal that can be installed, for example, on a centering ring, possibly with the help with bolted or clamped connections. A plurality of rods with rolled filter elements are installed in the filter housing. By this means, it is possible
REFERENCES:
patent: 1339045 (1920-05-01), Stern
patent: 2106218 (1938-01-01), Krieck
patent: 2358933 (1944-09-01), Lance
patent: 3344923 (1967-10-01), Pall
patent: 3504803 (1970-04-01), Brayman
patent: 3572509 (1971-03-01), Dexter
patent: 3887467 (1975-06-01), Johnson
patent: 3986960 (1976-10-01), Wire et al.
patent: 4017400 (1977-04-01), Schade
patent: 4259097 (1981-03-01), Patel et al.
patent: 4575422 (1986-03-01), Zimmer
patent: 4869820 (1989-09-01), Yee
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