US 2702636 A
Description (OCR text may contain errors)
Feb. 22, 1955 R. H. BROWN 2,702,636
OIL FILTER Filed July 14, 1950 United States Patent OIL FILTER Robert H. Brown, Pulaski, Tenn.
Application July 14, 1950, Serial No. 173,843
1 Claim. (Cl. 210-112) This invention relates to an oil filter and has relation more particularly to a device of this kind for use in connection with crank case oil or the like circulating under pressure.
In filters now generally in use there is employed a removable top cap and frequently leakage occurs at the cap which materially intereferes with the desired functioning of the motor. It is an object of the invention to avoid this disadvantage.
A still further object of the invention is to provide an oil filter wherein the body is provided therearound with a trough to receive oil that leaks out when the cap of the body for any reason is not fully effective in closing the body tight with means for returning the oil received in the trough to the crank case.
The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved oil filters whereby certain advantages are attained, as will be hereinafter more fully set forth.
In order that my invention may be better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:
Figure l is a sectional view taken radially through a filter constructed in accordance with an embodiment of the invention, associated parts being in elevation, and
Figure 2 is a sectional view taken substantially on the line 22, looking in the direction of the arrows.
As disclosed in the accompanying drawings, B denotes the body of the filter open at the top and having its lower or bottom portion intersected by a perforated plate 1 rigid with the side wall 2 of the body B. The filter element or cartridge F is placed within the body B tliirougih the open top of the body and rests upon the p ate In communication with the interior of the body B below the plate is a return line 3 which returns the oil to the crank case (not shown) or otherwise as may be desired. This line 3 has communication within the body B through the axial center or lower point of the permanent bottom wall 4 of the body B.
The open top of the body B is closed in a conventional manner by a cap C held in place by the bolt 5 inserted from above through the axial center of the cap C and therealong into the central portion of the plate 1. The filter element or cartridge F is provided axially therethrough with a bore 7 for the passage of the bolt 5. Interposed between the marginal portion of the applied cap C and the adjacent end of the wall 2 is a conventional gasket 8.
In practice it often occurs that in replacing the cap C after changing the filter element or cartridge it failed to properly lighten the bolt 6 thus allowing leakage of oil. There is also a possibility of oil leakage on account of a 2,702,636 Patented Feb. 22, 1955 defective gasket 8 or by vibration resulting in the cap C becoming loosened.
To collect or recover the oil leakage the upper portion of the body B has formed therewith a surrounding gutter 9 wh ch retains the oil leaking out at the top of the body. Leading from a low point of the gutter 9 is a pipe line 10 to return the collected or reclaimed oil to the crank case.
Delivering within the body B through the side wall 2 and at a point closely adjacent to but below the gutter 9 is a line 11. The oil under pressure enters the body B through the line 11 and normally returns to the crank case through the line 3. As before explained, leakage at the top or open end of the body B is collected or reclaimed in the gutter 9 and returned through the line 10 to the crank case.
In order to prevent foreign matter being received in the gutter 9 a concave-convex lid 12 and a gasket 8' is provided. The marginal portion of the lid 12 carries a continuous depending flange 14 which, together with the gasket 8, rests upon the upper edge of the outer wall of the gutter 9 and is held in place by the spring clips 15 pivotally engaged, as at 16, with the outer wall of the gutter 9 and which engage over the marginal portion of the lid 12.
From the foregoing description it is thought to be obvious that an oil filter constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated.
In an oil filter, a cylindrical body having an open top and a concave-convex bottom wall, a second bottom wall horizontally disposed at the lower end of the side wall of the body and having a plurality of perforations, a filter cartridge within the body and seated upon said second bottom wall, the convex side of said bottom wall being downwardly directed, said body having an oil inlet opening through its side wall and an oil outlet leading outwardly through the first bottom wall at its center, an outwardly and upwardly inclined wall integral with and encircling the upper end of the side wall of said body and forming a gutter therewith for the collection of oil overflow from the open end of the body, a gasket seated on the edge of the side wall of said body, a concaveconvex cap seated on said gasket, a bolt passing downwardly through the centers of the cap and said cartridge and having its lower end screw threaded into said second bottom wall, a second gasket seated on the rim of said inclined wall, a concavo-convex lid supported on said second gasket, ears projecting radially outward from said inclined wall, spring elements of hook form pivotedly mounted on said ears to engage with the edge of said lid for securing the lid in place, and a drain outlet leading through said inclined wall adjacent the bottom of the gutter.
References Cited in the file of this patent UNITED STATES PATENTS 543,389 Loew July 23, 1895 1,616,577 Janette Feb. 8, 1927 1,647,799 Hammer Nov. 1, 1927 2,072,393 Briggs Mar. 2, 1937 2,183,877 Wilkinson et al Dec. 19, 1939 2,529,167 Lewis et a1. Nov. 7, 1950 2,578,020 Sandberg Dec. 11, 1951