US2450208A - Filter - Google Patents

Description

Sept. 28, 1948. T, L TER 2,450,208

FILTER I Filed May 20, 1947 Fig'. I.

' l urcutor Thomas Harold Slater mama Sept. 2a, 1948 UNITED STATES PATENT OFFICE 1 Claim. (01.210-7-164) This invention relates to a filter, and more particularly to a fllter for use in the cooling system .of anlnternal combustion engine.

The primary object of the invention is to exclude mud,- silt, scale and the like from the small passages in the radiator of a cooling system, through which the cooling liquid. is circulated.

Another object is to facilitate the rapid removal of the filter from the cooling system for cleansing, and to render the interior of the filter readily cleanable. The above and other objects may be attained by employing this invention which embodies among its features a tubular body, end walls at opposite ends of the body, an outstandingtubular nipple .on each end wall communicating with the interior of the body, 'a foraminous cylinder fixed.

at one end .to an end wall of the body and extendingtoward the opposite end wall thereof in concentric spaced relation to the nipples, a cap closing the end of the foraminous cylinder in spaced relation to the end wall opposite that to which .the cylinder is fixed, and a pipe entering the ioraminous cylinder through the nipple carried by the wall to whichthe foraminous cylinder is ilxed and terminating in spaced relation to the cap. I

Other features include mounting the pipe to slide longitudinally into and out of the nipple so that it may be withdrawn to render the interior of the filter accessible for cleaning, and a flange extending outwardly from one end of the pipe to limit the distance that the pipe may enter the foraminous cylinder through the nipple.

In the drawings, a

Figure 1 is a fragmentary side view 01' an internal combustion engine and radiator for the cooling system thereof illustrating this improved filter coupled in the system,

Figure 2 is an enlarged longitudinal sectional view through the fllter, and

. Figure 3 is a transverse sectional view taken substantially along the line 2-2 of Figure 2. 1

Referring to the drawings in detail, an engine I block I is equipped with a conventional cooling fluid dischargecoupling II to which a flexible hose i2 is coupled in a conventional manner. This hose l2 normally discharges into a nipple l3 carried at the upper end of a conventional radiator ll, so that the heated cooling fluid leaving the engine block ill will be directed through the radiator l4, and cooledlto be re-circulated through the engine block Ill inthe conventional manner. The cooling fluid or liquid ordinarily contained in the cooling system frequently attacks the walls 01' the passages through which it flows, causing them to rust and scale, and the minute particles are carried by the cooling liquid into the small passages of the radiator it with the result that 5 these passages are likely to become clogged. Such clogging of the passages of a radiator seriously impairs its. efllciency as a cooling device for the liquid, and at times serious damage to the engine may result.

In order to overcome these dimculties, I introduce into the system between the engine-block ill and theradiator I a filter, designated generally I5. This filtercomprises a tubular body l8 spun at one end to form a dome-shaped end.

wall l1 and an outwardly extending tubular discharge nipple i8 which aligns axially with the axis of the tubular body l6. The end of the body l6 opposite the end wall i1 is closed by an end wall l9 carrying an annular retaining flange which may be soldered or otherwise fixed to the tubular body. iii. A tubular nipple 2i extends outwardly from the wall IS in axial alignment with the nipple l8, and these nipples are of a diameter readily to fit within the flexible hose commonly employed to couple the fitting II with the nipple It in the cooling system.

Soldered or otherwise fixed to the end wall i! in spaced concentric relation to the nipple 2| and the tubular body I6 is a foraminous cylinder 22. As .illustrated in Figure 2, this cylinder extends from the inner face of the end wall l9 toward the end wall H, but terminates short of the end wall l1 and is provided with 'a dome-shaped cap 23 forming an end closure for the foraminous cylinder. The cylinder 22 and the cap 23 form a filter unit within the tubular body l6, and the interstices in the foraminous cylinder 22 are of such minute diameter as to prevent particles of scale or the like carried by the cooling liquid from passing through the toraminous cylinder.

Entering the foraminous cylinder 22 through the nipple 2| is a pipe 24, one end of which is provided with an out-turned annular flange 25. This pipe 24 is of a diameter snugly to fit the internal diameter of the nipple 2i so that even though the pipe may be extracted from the nipple, it will be held therein by frictional contact therewith. The pipe 20 is of a length sufllcient so that when the flange 25 abuts the outer end of the nipple 2!, the inner end of the pipe will be spaced from the dome 23 so that liquid entering the pipe 24 will be discharged from the inner end thereof into the interior of the ioraminous cylinder 22 adjacent the end remote 1mm the wall it.

In use, the hose length 12 which normally establishes communication between the fitting II and nipple I8 is severed and cut into shorter lengths l2 and I20. and the nipple 2| is entered into the hose length l2 and clamped thereon by a conventional hose clamp 26. The nipple I8 is then entered into the hose length Rd and clamped thereon by a conventional hose clamp 21. With the hose- clamps 26 and 21 properly tightened, no leakage will occur around the junction of the hoses with the nipples. Assuming the cooling system to be filled with liquid, it will be obvious that when the engine is set into operation the cooling liquid will flow through the discharge coupling II and into the hose length [2 from whence it passes through the pipe 24 into the interior of the foraminous cylinder 22 which serves to arrest scale and like foreign matter. The liquid continues on through the perforations in the foraminous cylinder and is discharged through the nipple l8 into the hose length |2a from whence it enters the nipple l3 and radiator H. In this way, any foreign matter carried from the engine block l toward the radiator will be arrested by the filter l5, and clogging of the small passages in the radiator will be avoided. The foreign matter will collect within the filter between the foraminous cylinder 22 and the pipe 24, and periodically the filter may be removed from the cooling system and the pipe 24 extracted, thus giving access to the material collected with the filter which may be flushed out, as by coupling the nipple l8 to a source of water pressure and allowing the liquid to flow through the filter in a reverse direction. Once having been cleaned, the pipe 24 may be re-introduced into the foraminous cylinder 22 through the nipple 2i and the flange 2-5 will serve properly to space the inner end of the pipe from the cap 23.

While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

Having described the invention. claimed as new is:

A filter adapted to be introduced in the cooling system of a liquid cooled internal combustion engine between the cooling liquid discharge of the engine block and the radiator, comprising a tubular body, end walls at opposite ends of the body, an outstanding .tubular nipple on each end wall communicating with the interior of the body, a foraminous cylinder fixed at one end to an end wall of the body and extendingtoward the opposite end wall thereof in concentric spaced relation to the nipples, a cap closing the end of the foraminous cylinder in spaced relation to the end wall opposite that to which the cylinder is fixed, a pipe slidably fitted into the nipple carried by the end wall to which the foraminous cylinder is fixed, said pipe being adapted to project into the foraminous cylinder and an outstanding annular flange on the pipe for engaging the end of the said nipple and limiting the distance that the pipe m" enter the cylinder.

THOMAS HAROLD SLATER.

REFERENCES crrEp The following references are of record in the file of thispatent:

UNITED STATES PATENTS Number Name Date 520,168 Postlethwaite May 22, 1394 1,645,364 Weaver 001. 11, 1927 1,725,386 Anschicks Aug. 20, 1929 what is

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