US2682953A

US2682953A - Cell type filter

Info

Publication number: US2682953A
Application number: US207740A
Authority: US
Inventors: Earl G Gunn
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-01-25
Filing date: 1951-01-25
Publication date: 1954-07-06
Anticipated expiration: 1971-07-06

Description

July 6, 1954 E, GUNN 2,682,953

CELL TYPE FILTER Filed Jan. 25, 1951 gay/ INVENTOR." I Wfzarzm Patented July 6, 1954 UNITED snares PATENT OFFICE CELL TYPE FILTER Earl G. Gunn, Racine, Wis.

Application January 25, 1951, Serial No. 207,740

2 Claims.

This invention relates to cell type filters and the form and arrangement of the filter elements of which the cell is constituted.

One form of cell type filter presently being produced involves a stack of disk-like elements of porous stock through which contaminated fluids, particularly oil, are drawn from the periphery of the stack to a central opening for the purpose of removing the contaminants. and relative arrangements of these elements have been employed, some providing for cross-flow, i. e., passing the fluid axially through the elements, or edge-wise flow, i. e., passing the fluid through the elements in the respective planes thereof.

The major problems in such an arrangement of elements are (l) obtaining an easy, rapid flow of a maximum quantity of fluid with a high degree of contaminant removal, (2) the economic formation and assembly of the elements into the finished cell, and (3) maintenance of the cell against easy shrinkage or other distortion during use so as to avoid decrease in its efficiency or too frequent replacement.

The main objects of this invention, therefore, are to provide an improved form of filter element and a relative radial angular arrangement of a plurality thereof in a stack for a cross-flow cell type filter; to provide an improved form of element whereby the laminated arrangement of a plurality thereof in a stack constitutes fluid pockets interposed between sector-shaped chambers opening at the periphery of the stack of elements and extending radially inward on both sides of the pocket and substantially coextensive with the area of the pocket, whereby the fiuid is filtered transversely through an imperforate wall on both sides of a pocket and from which pocket the filtered fiuid'is drained into a central channel in the cell filter; to provide an improved form and arrangement of a series of superimposed Various forms elements such that a substantial portion of the peripheral area of the cell constitutes entrances to chambers overlying both sides of the pockets; to provide an improved form and arrangement of elements of this kind made of identical configuration; to provide an improved form and arrangement'of elements which permits the respective elements to be peripherally sealed with an airhardening viscous substance throughout the circumferential portions which define each pocket; and to provide an improved form and arrangement of filter elements of this kind which are economical to produce, which will permit the use of material of almost any desired porosity,- and which will have great endurance under the severest use.

In the accompanying drawings:

Fig. 1 is a front view, partly elevation and partly section of a cell type filter constructed in accordshowing the relative angular arrangement for the formation of pockets and chambers; and

Fig. 3 is an enlarged sectional detail, showing the form of the pockets interposed between chambers and indicating the direction of flow of the fluid during the filtering process.

The distinctive concept of this invention involves a stack of superimposed filtering elements of identical disk-like form with imperforate and open sector-shaped sections so assembled that one element with an open section is interposed between alternate elements with imperforate sections to form a series of pockets intermediate sector-shaped chambers substantially coextensive with the area of each pocket, which chambers open at the periphery of the stack of elements to permit the fluid to enter the chambers and spread over on opposite sides of a pocket to filter through the imperiorate sections into the pockets from which the filtrate is drained into an axial channel formed in the stack by registering openings in the hubs of the elements. Preferably the peripheral portions of the elements which coact to form the pockets are sealed with an air-hardening viscous substance so as to preclude entrance of fluid along that boundary of the pockets.

The herein shown embodiment of this invention comprises a plurality of disk-like elements of identical configuration 8, having sector-shaped imperforate and open sections so arranged that when the elements are superimposed in a stack 1 l and angularly arranged they form several axial series of pockets l2 each pocket being closed along its circumferential periphery and interposed between chambers l3. The chambers l3, as will be noted later, are substantially coextensive with the pockets l2 and being open at the circumferential periphery of the stack ll permit the fluid to be filtered to spread out in the chambers 13 and pass axially through substantially the entire area of the imperforate sections of the elements 8, 9, and Iii into the pockets I2. Such a stack ll of angularly arranged elements is supported on a tube It for operative positioning in a housing l5 whereto the fluid for filtering is admitted and Wherefrom the filtrate is discharged, as will be explained later.

The one-configuration filter element 8, a plurality of which constitute the stack ll shown in Fig. l, is formed with a sector-shaped section It and a pair of radial spokes IT. The sectorshaped section It is slightly more than a semicircle with its chord 18 disposed on the opposite side of thediameter of the element from its circumference I9. This sector-shaped section It is formed with a sector-shaped opening 2!] substantially equidistant from the sector-defining chord l8. This provides two sector-shaped imperforate portions 2! and 22 at opposite sides of the sectorshaped open portion 20. Between the two spokes I1, and between each spoke H and the adjacent

imperforate portions

21 and 22 are spaces 23.

Within the hub portion .24 of each element 8 is formed a non-circular opening 25 communicating through a slot 26 with the respective opening 20. As herein shown the opening is in the form of a six-point star. This permits the elements, as they are formed or afterwards, to be assembled on a well-known type of indexing spindle whereby each element 8 will be disposed successively one-sixth of a circumference in advance of the previous one. To facilitate this assembling on an indexing spindle, and

, later to support bail rods 21 (see Fig. 1), apertures 28 are formed in the ends of the spokes IT and around the peripheral edge of the sectorshaped section I6.

Thus, as will be apparent from Fig. 2 (reading upwardly), the successive angular disposing of these identical elements 8 results in a sectorshaped opening 20 in one element being located between the sector-shaped imperforate portions 22 and 2I of the next below and above elements, thereby forming the pockets I2. The spaces 23 between the spokes I! and on each side thereof adjacent the sector-shaped imperforate portions 2I and 22 for the three elements 8 next above and below the ones that form a pocket I2 constitute the sector-shaped chambers I3 on the opposite sides of each pocket I2.

As will be most clear from Fig. 3 the chambers I3 extend from peripheral openings or inlets 29 radially inwardly to the superimposed hub portions 24 of these elements. These chambers I3 are practically coextensive with the entire area of a pocket I2. Therefore, the fluid entering the chambers I3 on both sides of a pocket I2as indicated by the arrows spreads over the entire area of the pervious sections 2I and 22 and filters through these sections into the pocket I2 from whence the filtrate fiows out through the slot 26 into the channel 2| formed by the registering hub openings 25. The openings or inlets 29 constitute nearly half of the peripheral area of the stack II.

To block off the penetration of a fluid into the pockets I2 edgewise from the periphery of the stack II in between the adjacent abutting faces of the elements, a suitable seal 32 of some appropriate air-hardening adhesive substance is applied, as is indicated in Fig. 3.

So formed, a stack II of these angularlyarranged elements 8 is mounted on a tube I4 within the housing I5. The form and arrangement of the tube and housing is not critical to a cell type filter embodying this invention.

The tube I4 is of adiameter less than the shortest distance across the hub opening 25 so that with the stack I I in place thereon the channel 3I extends axially the full length of the stack exteriorly of the tube I4. The channel 3I communicates with the interior of the tube I4 through an aperture 3Ia (see Fig. l).

The stack II is interposed between end caps or plates 33 and 34. The latter sets on a fluidseal gasket 35 resting on a hub plate 36 supported by an annular shoulder 31 on the tube i4. At the opposite end, a fluid-seal gasket 38 is interposed between the end cap 34 and a hub plate 39. At its lower end the tube I4 is formed with a collar Ma and is threaded internally for connection with a suitable conduit for conveying the filtrate to the point of use or storage.

The housing I5 is here shown of cylindrical form with a conical-shaped bottom and conicalshaped closure 40. Axially alined openings in the base of the housing I5 and in the closure provide for the reception of the telescopically arranged tube I4 and bolt 4I whereby the tube I4,

with the filter stack II mounted thereon, is appropriately positioned in the housing I5, with the closure 40 drawn firmly down onto the housing I5. A spring 42 is interposed between the closure 40 and the hub plate 39 so as to yieldingly compress the elements 8 firmly against each other throughout the length of the stack. Fluid sealings gaskets 43 and 44 are interposed between the closure 40 and the upper rim of the housing I5 and between the head of the bolt M and the closure 40. The housing I5 is formed with a suitable fluid inlet 45 and a normally-plugged drain outlet 48.

Other variations and modifications in the details of the structure and arrangement of the parts may be resorted to within the spirit and coverage of the appended claims.

I claim:

1. A cell type filter comprising a stack of liquidpermeable elements of identical configuration, each element embodying a sector-shaped section of slightly more than semi-circular form supported on a hub section having a central opening and having a sector-shaped opening formed therein of less than one-third the area of the section and located circumferentially equidistant from the section chordso as to be disposed between two imperforate portions of the section of equal area, the sector-shaped opening of the section being tapered towards its inner end and communicating with a narrow slit extending from the inner end to the hub opening, and a pair of spokes radiating from the hub to form three equal area sector-shapedspaces the intermediate one of which is diametrically opposed to the sector-shaped section opening and the other two of which are diametrically opposed to the respective imperforate portions of the sectorshaped section, the elements being superimposed in the stack with the central hub opening registering axially of the stack and so angularly arranged that the sector-shaped opening of the sector-shaped section of one element is interposed between the imperforate portions of the sector-shaped sections of two other elements thereby constituting a pocket between such imperforate portions disposed in axial registration with the spaces between the spokes of each two elements above and below, and whereby the spokes define peripherally-open chambers on opposite sides of each pocket for the reception of fluid to be filtered through the imperforate portions of the sector-shaped sections into the pocket for draining into the central hub opening.

2. The structure of claim 1 wherein the peripheral edges of the three sector-shaped sections which constitute a pocket are sealed with an air-hardening substance against the entrance of a fluid into the pocket between the abutting faces of the section.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,359,475 Gauthier Oct. 3, 1944 2,392,354 Alsop Jan. 8, 1946 2,495,095 Ewbank Jan. 1'7, 1950 2,501,582 Rohland Mar. 21, 1950 2,522,502 Clark Sept. 19, 1950 2,548,584 Briggs Apr. 10, 1951 2,553,820 Gunn May 22, 1951 2,591,056 Ericson Apr. 1, 1952 FOREIGN PATENTS Number Country Date 969,125 France May 17, 1950