US1919805A - Filtering means - Google Patents

Description

y 1933- T. A. SCHOENLAU 1,919,805

FILTERING MEANS Filed Oct. 11, 1930 FIG. 2

BY My $04 ATTORNEYS Patented July 25, 1933 UNITE ATES PAT-NT. OFFECE THEODORE A. SCHOENLAU, OF ST. LOUIS, MISSOURI FILTERING MEANS This invention relates to improvements in filtering means for liquid cooling systems, and more particularly to an improved filter for location in the water circulating system 45 of antomotive internal combustion engines.

I am aware that various attempts have been made in the past, to provide a success ful accessory filter for the water circulating systems of automotive and like engines, but

ll so far as I am aware none of the devices heretofore available has provided the requisite degree of efliciency in the removal of solids suspended in the circulating llquid stream, nor has provided a device which, no matter if neglected for long intervals of time, yet will not interrupt to any serious degree, the flow of circulating water. Certain of the devices heretofore provided, have been characterized by the difliculty of removing the accumulation of filtered solid matter therefrom.

In accordance with the foregoing, it is an object of the present invention to provide a simple, rugged, inexpensive and yet efficient device which will serve as a filter for the separation of suspended solids such as dirt, scale, rust, etc., which normally tend to ac cumulate in the jacket and radiator of automotive engines.

A further object of the invention is to construct a device of the type noted, in such a manner that the solid matter accumulated as a result of the filtering action of the device, is automatically removed from the normal path of the circulating water, whereby to permit an appreciable accumulation of the undesirable suspended substance without impairing the circulation in the system.

Yet another object of the invention is to provide a filtering device of the type noted, of such a nature that it is not necessary to disturb the fluid connections leading into and away from the device in order to effect cleaning thereof.

The foregoing and other objects will appear from the following detailed description, reference being had to the accompanying drawing of a presently preferred embodiment of the invention, and wherein like characters denote corresponding parts in the several views, and in which:

Fig. 1 is a view showing a portion of a motor and a radiator with a device of the present invention located in the water line 5i connecting the cooling jacket of the motor, with the radiator, and Fig. 2 is a vertical sectional elevation through the filtering device appearing in Fig. 1.

Referring now by characters of reference to the drawing, a fragmentary portion of a Water-cooled motor block is indicated at 3 and is provided with an outlet pipe 4 which, according to usual practice, is connected to an inlet connection 5 to the radiator, a fragmentary shell portion of which appears at 6. My preference is so to construct the device of the present invention, that it may be inserted, without material alteration in these parts as they are normally related, m in fact the device as illustrated is so proportioned as to be applicable to any standard make of automobile, in a few minutes time. According to the illustrated example, the device consists of a container 7 which is by preference of cylindrical form and provided with a nipple 8 for an inlet connection, and a nipple 9 aligned therewith for an outlet connection, these connections being disposed respectively near the upper opposite end wall portions of the container so that connection may be eflected into and out of the container 7 in any suitable manner such as by flexible couplings '10.

Disposed within, and shown as consti- 85 tuting an extension of the nipple 8, is a flared induction tube 11, provided with a plurality of openings 12, the induction tube being of increasing diameter as it approaches the outlet of the container, and the openings 12 being by preference of substantial number and size. The induction tube does not, by preference, extend completely through the container 7, but is spaced from the end wall thereof containing the outlet connection. Disposed, by preference, transversely of the container, and between the open outlet end of the induction tube and the outlet end of the container, is a filtering material, pref erably a metallic screen 13. This screen is preferably at least coextensive with the internal cross sectional area of the container, so that all fluid entering the outlet fitting 9, must traverse the screen. This screen is by further preference of concavoconvex aspect, having its convex side presented toward the inflowing stream. This arrangement aids in keeping the screen washed free of accumulations, since its filtering face is disposed at an angle to the line of flow. A further advantage is found in that the screening material is thus mounted under no appreciable tension, and so resists abrasion, resulting in a materially greater life.

As a means for readily relieving the filter of accumulated foreign solids such as rust, scale, etc., I prefer to provide an internally threaded fitting 14 provided with a threaded plug 15, which may, if desired, be provided with a gasket, (not shown).

It will appear from the foregoing that Water discharge from the jacket 3 of the en gine, upon entering the fitting 8 and thereafter the tube 11, will tend to fill the container with water, and the flow being from left to right in the figures, the water will pass through the screen 13 and thence out of the filter through the outlet fitting 9, to the radiator.

It has been found by experiment that a device of the present type will serve to a certain degree as a settling chamber so that even if the screen 13 is omitted or becomes broken after a period of use, the device is still quite effective as a sediment trap. To the end of prolonging the effective life of the screen 13, the apertures 12 tend to divide the incoming stream of water so that a great part thereof is diverted into the lower part of the container 7 before encountering the screen. Without the provision of openings 12 scale and the like carried over from the motor, would be much more forcibly projected against that port-ion of the screen extending between the end of tube 11 and the outlet 9, and the effective life of the screen thereby shortened to a certain extent due to abrasion.

It will further appear that by disposing the inlet and outlet in the upper portion of the cylindrical container 7, by far the greater part of the space within the container is devoted to the reception of solid matter, permitting a substantial accumulation thereof before cleaning is necessary through the outlet fitting 14.

To remove the accumulation of solids from the tank 6 it is merely necessary to remove the plug 15 from the fitting 14 which, being in the lowest portion of the container and being under a slight head of pressure when the radiator is full, or nearly full, will be flushed out in a few moments time, without in any manner interfering with the estab lished fluid connections of the circulating system.

The foregoing description has dealt with particularity, with a single preferred executioual embodiment of the invention. It will, of course be understood that a number of changes may be made in the various parts of the device as well as in the arrangement and combinations thereof, without departing from the spirit and intended scope of the invention, as defined by the appended claims.

I claim as my invention:

1. A filtering device for automotive cooling systen'is, adapted for connection in a radiator inlet line and including a cylindrical container having its major axis arallel to said radiator line, and formed 0 sheet metal and provided at its opposite ends and in its upper portion with aligned openings forming a fluid passage therethrough, a conduit within the container, formed of perforate material, and disposed in line with said openings, and terminating within the container, a concavo-convex filtering screen disposed between the open end of said conduit and one of said openings, and having its convex surface facing the open end of said conduit, said conduit being of increased diameter from its inlet to an open discharge end, and disposed with its discharge end extended. toward said screen, but in spaced relation thereto. a drainage fitting in the lower portion of said container, and a detachable closure for said drainage opening.

2. In a fluid filter, for automotive cooling systems. and the like, an elongate casing having its axis parallel to the radiator inlet line, and provided at its opposite ends with inlet and outlet openings in its upper portion, a concave-convex screen disposed transversely of the line of flow through said openings and having its concave surface facing said outlet opening, and a tube internal of the container and connected with said inlet opening for distributing fluid flow over the space within the casing, said tube being formed of a perforate material of increased diameter toward its discharge end, and spaced from said screen at its point of discharge into the casing.

3. A water filter for accessory installation in an automotive cooling system, and including an elongate, cylindrical container having its major axis disposed parallel to the line of flow to and from the container, inlet and discharge fittings disposed in aligned relation in the upper parts of opposite end walls of the container, a distributing conduit disposed within an upper portion of said container and aligned with the intake fitting, said conduit being of tapered conformity, and perforated over its entire length and having its largest diameter nearest the discharge fitting, a concave-convex filtering screen extending transversely of the I container, the filtering screen being dis osed between the large diameter end o ai conduit and the end wall of the container having the discharge fitting therein, spaced from said conduit and wall, and having its concave surface facin said walland discharge fitting, a dramage outlet substantially at the lowest portion of the container, and a removable closure for the drainage outlet.

and outlet fittings carried substantially at the uppermost portions of opposite end walls of the container and parallel to its major axis, an induction pipe associated with said inlet fitting and forming a continuation thereof internally of the container, and lying closely adjacent to the upper or outermost wall thereof, said conduit being of flared construction and increasing diameter from the inlet toward the outlet fitting and terminating substantially short of the outlet fitting, said conduit being perforated over its entire length and adapted for the distribution of incoming water about the interior of the container, a concavo-convex metallic screen extending transversely of said container and havin its concave surface spaced from and facing the outlet end thereof, an annular grooved seat pressed in the container walls, for positioning said screen, a drainage fitting disposed at substantially the lowermost portion of the inlet end of the container, and a threaded closure for said drainage fitting.

THEODORE A. SCHOENLAU.

Images