US2342948A - Oil filter - Google Patents

Description

Feb. 29, 1944; J. H. LONG OIL FILTER Filed March 2, 1942 fr JamesHLqng',

Patented Feb. 29, 1944 UNITED STATES PATENT OFFICE OIL FILTER James Hartzell Long, Clay Center, Kans.

Application March 2, 1942, Serial No. 433,040

4 Claims. (Cl. .2N- 131) My invention relates to oil filters of the type employed in the removal of impurities from oil used in lubricating automotive and other internal combustion engines equipped with pumps for forcing the oil through the associated filters.

The present invention is an improvement over rnv U. S. Patent No. 2,210,213, issued Aug. 6, 1940. Objects of the present invention are to provide an oil filter possessing the advantages of my patented filter and also additional advantages such as arranging and connecting most of the inerior parts in such manner that they may be removed from the outer casing of the filter as a single unit; to prevent wastage of free oil from the outer casingduring removal therefrom of the interior parts with the filtering material after the latter has become permeated with impurities; to utilize more space in a given size filter so that the same may be charged with a larger quantity of filtering material and thus reduce the necessity for frequent recharging; to provide means for initially lifting the unit in the casing, so that it can be readily grasped and removed by hand; to reduce to a minimum the number of sealed openings in the filter casing through which leakage of oil might occur; and to facilitate cleansing of the inside of the casing by providing the bottom thereof with a sump which can be removed with sludge deposited therein by the oil. p

Other advantages will hereinafter appear and in order that the invention may be fully understood, reference will now be had to the accompanying drawing, in which:

Fig. 1 is a vertical central section of my oil lter.y

Fig. 2 is a fragmentary cross section on line 2-2 of Fig. 1. s

Fig. 3 is a detail of a conical spring.

In carrying out the invention I provide an outer casing 2 having a xed bottom 4, an oil inlet 5 in its upper portion, and a removable cover 3 provided with a downtumed marginal flange 8 for retaining a gasket I0 on the upper margin of the casing 2.

The bottom 4 of the casing 2 has a centrally disposed upwardly projecting socket I2 of segmental spherical form to provide a modified balland-socket joint in conjunction with the correspondingly shaped enlarged lower end of an outlet member I4 extending upward into the 'casing through a central aperture I6v in the opening 28.

at 20 for connection with an outlet pipe (not shown).

The modified ball-and-socket joint enables the i outlet member I4 to be axially alined with and threaded in the lower end of a vertical, tubular connector 22 provided at its upper portion with an oi1 inlet 23 and a cap nut 24, which latter, in addition to being threaded upon the tubular connector is further secured thereon by a transverse pin 26, so that when grasped and rotated to apply or remove the tubular connector 22 from the outlet member I4 said cap nut 24 will not become unscrewed from the tubular connector. The cap nut 24 extends down through a -central opening 28 in the casing cover 6 and its enlarged upper end overlaps a gasket 29 resting upon the cover and adapted to seal the After the outlet member I4 has been alined with the tubular connector 22 it may be brazed or otherwise permanently secured in the socket I2.

A perforated tube 30, spaced from but arranged concentrically with the tubular connector 22, rests at its lower end upon a plate 32, a gasket 34 being interposed between said lower end and the plate to provide an oil-tight joint.

The plate 32 rests upon a conical spring 36 and has a central aperture 38 through which the upper portion of a nut 40 extends. 'I'he nut 40 is threaded on the lower end of the tubular connector 22 and has an enlarged lower end for vsupporting the spring 36.

The plate 32 provides a removable bottom for a perforated cylinder 42 which rests in a removable sump 44 located on the casing bottom 4 to catch sludge and other impurities deposited therein by the oil. An upwardly extending Imarginal flange 45 on the sump serves to center the perforated cylinder 42 within the casing 2. TheA sump has a centrally disposed upwardly extending tubular portion 46 with a central aperture 4l through which the outlet member I4 projects. A conical spring 48 is interposed between the socket I2 and the tubular portion 46 for initially lifting the sump 44 from the bottom 4 when the tubular connector 22 and nut 40 are removed from the casing as will hereinafter appear. After thus initially lifting the sump 44, it can be readily removed from the casing 2, as any suction tending to hold it against the casing bottom 4 will be interrupted.

The upper end of the perforated cylinderr42 is provided with a fixed lid 50 which is preferably spot-welded or otherwise secured to the under side of the cover 6. so that the lid, the pen forated cylinder 42 and the cover may be removed together from the casing 2. A peripheral flange 52 depending from the lid 50, sur-A rounds the perforated cylinder 42 and coacts with the flange 6 of cover 6 in holding the gasket I upon the upper edge of the casing 2. The central portion of the lid 50 is provided with a depending tubular extension 54 having a central aperture 55 through which the tubular connector 22 projects. The tubular extension 54 removably fits into the flaring upper end of the be packed in from the plate 32 to the lid 50.

thereby utilizing almost the entire inner part of the casing 2 for the filtering material.

In practice, oil to be filtered enters through the inlet 5 and fills the casing 2 to a level with the inlet 23 in the tubular connector 22 through which the oil descends and escapes through the outlet duct I8 after passing through the perforated cylinder 42, the filtering material A, and the perforated tube 30. In the course of time the filtering material becomes so permeated with impurities deposited by the oil that it no longer performs its function in an eicient manner and should then be replaced with fresh filtering material. The foregoing can be readily accomplished by first rotating nut 24 until the tubular connector 22 is unscrewed from the outlet member I4. During the foregoing operation nut 40 partially lifts spring 36, plate 32, tube 30, cylinder 42 with the filtering material, lid 50 and cover 6 as one unit and thereby breaks the seal between the casing 2 and the gasket I0. thus overcoming any suction tending to hold the lid and the cover upon the casing 2. After thus breaking the seal and partially raising the complete unit the latter can be easily removedfrom the casing by pulling upward on the lid 6 orvthe nut 24. When the lid 50 and cover B are lifted as stated, there will be no overflow and wastage of free oil as the level of the latter was prevented by the filtering material and flange 52 from rising above the lower edge of the latter when the lid 50 was in closed position. After the unit has been removed from casing 2 nut 40 is unscrewed from the tubular connector 22, which latter, together with plate 32 and the perforated tube 30 are then removed from the perforated cylinder 42. As tube 30 is removed it takes therewith the old filtering material. The tube 30 and the cylinder 42 are then cleansed, after which the former is replaced in the latter which is then repacked with fresh filtering material. The remainder of the unit is then assembled ready for placement in the casing 2. Before replacement of the unit. however, the sump 44, which was initially lifted from the container bottom 4 by spring 48 when relieved of pressure from nut 40, is manually removed from the casing 2, cleansed, and replaced.

From the foregoing description, taken in connection with the drawing, it is apparent that I have provided an efficient filter well adapted for the purpose intended and while I have shown a preferred form of the filter I reserve all rights to such other forms and modifications thereof as properly fall within the scope of the invention as claimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In an oil filter, a casing having an inlet and an outlet and provided with a closed bottom, a filtering medium in said casing disposed between the inlet and the outlet, a sump resting upon said bottom and adapted to be removed from the casing, said sump having a centrally disposed upwardly extending tubular portion, means removable from the casing and adapted to hold` the sump on the bottom of the casing, and spring means interposed between the bottom of the casing and said tubular portion to raise the sump when said removable means is removed from the casing.

2. In an oil filter, a casing having an oil inlet and provided with a bottom having a centrally disposed inwardly projecting socket of segmental spherical form, an oil outlet member extending inwardly through a central aperture in the socket and provided with an enlarged lower end of segmental spherical form fitting snugly within said socket, a filtering medium in the casing interposed between the oil inlet and the oil outlet member, a removable cover for the casing, a tubular connector threaded upon the oil outlet member and extending through a central aperture in the cover, and means on the upper end of the tubular connector overlapping the cover and adapted when rotated in one direction tov unscrew said tubular connector from the oil outlet member.

3. In an oil filter, a casing having an inlet and an outlet, a removable filtering medium in said casing disposed between the inlet and the outlet, a removable sump in the lower part of the casing, means removable from the|casing and adapted to normally hold the sump in the lower part of the casing, and resilient means interposed between the sump and the bottom of the casing for initially raising the sump in the casing when said removable means is taken from the casing.

4. In a casing having an inlet and a closed bottom, a perforated cylinder open at its bottom and removably disposed in the casing, filtering material in the perforated cylinder, a plate removably arranged inside the open bottom of the perforated cylinder, a lid closing the upper end of the perforated cylinder and provided with a central downwardly projecting extension, a perforated tube resting upon the plate and removably engaging the lid and the central extension, spring means arranged beneath the plate to press the same upwardly and thereby normally hold the upper end of the perforated tube in assembly with the lid, an adjustable support'for said spring means, a tubular connector having an inlet near its upper end and upon which the support is adjustably mounted, means closing the upper end of the tubular connector and overlapping the lid, and a stationary outlet member extending through the bottom of the casing and upon which the lower end of the tubular connector is threaded.

JAMES HARTZELL LONG.

Images