US2553567A

US2553567A - Filter

Info

Publication number: US2553567A
Application number: US633016A
Authority: US
Inventors: Joseph F Fette
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-12-05
Filing date: 1945-12-05
Publication date: 1951-05-22
Anticipated expiration: 1968-05-22

Description

May 22, 1,951 F. J. FETTE 2,553,567

FILTER n Filed DGO. 5, 1945 T. JEHE @w amr Patented May 22, 1951 als FILTER Frank J. Fette, Tampa, Fla.; Joseph F. Fette executor of said Frank J. Fette, deceased Application December 5, 1945, Serial No. 633,016 1 Claim. (C1. "21o-167) moved from the liquid and expelled from the apparatus.

The primary object of the invention is to provide a filter to remove from the wort of beer all solids including molds, before the wort enters the cooker.

' Another object of the invention is to provide a filter in which the filter elements are easily removable for cleaning'or replacement.

A further objectV of the invention is the provision of a fabric filter element having metallic reinforcements to resist outward pressure.

In the preferred embodiment of the invention selected for the purpose of illustration, Figure 1 is a central, vertical section through the filter with parts in elevation and parts broken away; Fig. 2 is a horizontal, transverse section on the line II--II of Fig. l; Fig. 3 is a plan view of the pump with the surrounding plate in section; Fig. 4 is a fragmentary vertical section on the plane indicated by the line IV-IV of Fig. 3; Fig. 5 is a similar section on the plane indicated by the line V-V of Fig. 3; Fig. 6 is a fragmentary section on a larger scale than that of Figs. 1 to 5'of a group of rings in the lter assembly; Fig. 7 is a modification and Fig. 8 a still further modication of the structure shown in Fig. 6.

A cylindrical chamber I has a base 2 and a top 3. In the top, is an inlet opening 1. opening into the central portion of the chamber. An outlet opening 5 is at the lower portion of the wall of the chamber I. Spaced inwardly fromthe chamber wall is a cylindrical, perforated, metal shell S withinwhich is an assembly of metal rings 1 and 8. Inthe preferred form shown in Figs. 1 and 6, a fabric 9 is formed as a tube or open-ended bag of an internal diameter to receive the rings 1. After a ring 1 has been set inside of the tube, a ring 8 is slipped over the outsideof the tube into a position closely adjacent to the first ring, and a second ring 1 Vis then slipped inside close to thering 8 and so on, with the rings alternating inside and outside of the fabric, with layers of fabric between the adjacent rings.

Preferably, the rings 1 have an inside radius smaller than that of the rings 8 by an amount equal to the thickness of the fabric, so that when the assembly is completed, the exposed inner surfaces of theY fabric 9 are in the same cylin drical surface with the inner surfaces of the rings 1.

The outside of the assembly may similarly be made even at all points by making the outside radius of the rings 8 greater than that of the rings 1 by a, thickness of the fabric, as shown in Fig. y6. I

As a modification, each of the rings 8 may have a complete, annular, fabric covering I0 held by an outside seam II, as seen in Fig. 7, the intermediaterings 'I being left uncovered.

In the further modication illustrated in Fig. 8, a gasket I2 of fabric of any desired thickness may be inserted between rings 1 and 8, preferably all rings being of equal inner diameters, that is all of the size of T or all of size i3, none of the rings being covered. Obviously all the rings could be of the covered type as 8 in Fig. 7, if desired. In any or all of the arrangements illustrated or suggested, the metal rings Vwill provide a strong reinforcement against any possible pressure that the liquid could exert on the fabric held between them. It will be noted that more than half of the cylindrical surface 'of the ring and fabric assembly exposed to liquid under pressure is of fabric.

Liquid entering at the inlet d will pass into the fabric wherever a surface or edge is exposed on the interior of the cylindrical assembly and will flow through and between the fibers and outwardly between the metal rings into the space between the shell 6 and the wall of the chamber I, finally reaching the outlet at 5.

In any of the forms shown, the ring and fabric assembly may be slid down into the perforated shell 6 and the shell with the element inside may then be, set into the cylinder I concentrically with the cylinder and with a shaft I3 which is mounted coaxially of the cylinder for rotation by gears I4 and I5. The top 3 has a suitable bearing IE and a stuiiing box I1 for the upper end of the shaft.

`A plurality of Scrapers I8, each attachedto a sleeve I9 keyed upon the shaft, have their outer ends in contact with the cylindrical inner surface of the ring and fabric filter assembly. As shown in Figs. l and 2, these scrapers are set progressively around the shaft and with a slight overlap longitudinally, so that as the shaft turns counterclockwise, looking downward from the top, the Scrapers act to scrape the entire inner surface of the assembly. The sludge will drop to the bottom of the interior of the assembly, which rests upon a plate 20 supported in the base 2, and having a central opening for the shaft I3.

The lower surface of the plate 20 is formed with a recess 2| serving as a pump chamber to receive an oscillatory, ring-shaped pump member 22 provided with a radially projecting arm 23 which is slidable within a slot in a guide pin the ends of which are pivoted in the plate 25 and in the plate 25 which lies beneath the plate 23 to form a lower wall for the recess 2l. he member 22 has flat upper and lower surfaces sliding in close contact with the smooth sur faces of the plates 20 and 25 and it is oseiliated within the recess 2l by a cam 2% keyed to the shaft I3 `and in three-point Contact with the interior of the ring portion of the member 22 through antifriction rollers 2l.

An intake opening 28 seen in Figs. 3 and 4 but not in Fig. 1, is formed in the plate 28 as a passage from the bottom of the chamber within the filter ass-embly to the pump chamber 2 l. An outlet passage 29 formed in the plate 25, seen in Figs. 3 `and 5 but not in Fig. 1, connects 'with a passage 30 in the base 2 and leads into the top of a press chamber 3l.

With the parts in the position shown in Fig. 3, the cam 2S has drawn the ring member 22 away from the inlet 28 to the opposite side of the recess 2| creating a suction, which, aided by the pressure in the chamber l, has caused sludge to move from the inlet into the space opened between the ring and the inlet. This is half of the total space between the ring and the wall of the recess, the other half being filled with fluid sludge which will leave at the outlets 29 and S9 as the rotation of the cam continues to draw in sludge at 28 until the ring covers both the inlet and outlet ports at 180 of movement from the position of Fig. 3. The ring will continue its swinging and sliding movement around the inner wall of the recess, again opening both ports. The arm 23 separates the two passages so that the liquid sludge cannot pass the barrier formed by the arm.

The cylindrical press chamber 3i is secured at its upper end to the lower surface of the base 2. A bottom member 32 secured upon the lower end of the chamber SI has a central bearing 33 for the lower end of the shaft i3 surrounded by discharge openings 34. Within the chamber 3l is a perforated cylinder 35 containing a ring and fabric filter assembly 36 similar to that used in chamber l except for size. The arrangement of V ring and fabric is shown as in Fig. 6 but that of Fig. 7 or 8 may be used instead.

A screw 31 with a spiral flange is slidably mounted on the shaft I3, a spline 38 permitting upward movement of the screw on the shaft when the pressure upon the solids in the lower turns of the screw becomes greater than the resistance offered by the spring 39. This upward movement of the screw on the shaft acts to uncover the discharge openings 34 to permit the escape of solids from which a high percentage of water has been removed and since the resistance to pressure is a function of the quantity of water present in the solids, the discharge will normally occur when the desired dryness has been effected. The strength of the spring 39 will be chosen according to the material being pressed out.

The pressure exerted by the pump member 22 will force much of the liquid out at the upper portion of the filter assembly 36 and the pressure of the screw will drive the rest out through the portion of the lter assembly opposite the screw. The liquid leaves the screw press chamber 3| through an outlet tube 40.

A scraper 6l on a sleeve 42 secured to the shaft I3 will engage the inner surface of the uppermost rings in the assembly and a scraper arm 43 on the upper end of the screw 31 will engage the intermediate portion of the lter surface not reached by the scraper 5| or the spiral flange, and since these two Scrapers are keyed to the same shaft on opposite sides, they can never interfere with each other no matter how far upward movement of the screw may compress the spring 39.

This invention is primarily designed for use in filtering liquid produced in the preliminary treatment of malt in the saccharier to produce sugar and dextrine. All solids that have not been converted into soluble substances, including any molds present in the malt, will be removed so that the liquid entering the cooker will be clear and free from anything that might be detrimental to the flavor or aroma of the beer.

It will be understood that the invention is not limited to the details of construction and arrangement herein shown and described, but many changes in form, proportions, and location of parts may be made by those skilled in the art without departing from the invention as claimed.

I claim:

Filtering apparatus having a chamber, a filter assembly withinthe chamber adapted to receive liquid under pressure, the assembly comprising a plurality of metallic rings and a tubular fabric permeable to liquid, the rings being set alternately inside and outside of the fabric whereby to impose portions of the fabric between adjacent rings, the rings differing in interior radii by an amount substantially equal to the thickness of the fabric and with the rings of greater interior radius on the outside, whereby the inner surface of the assembly is substantially cylindrical with annular portions of the fabric exposed on the inside, and scraping means movable in contact with the cylindrical inner surface to remove solids therefrom.

FRANK J. FETTE.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 488,583 Sobotka et al Dec, 27, 1892 644,207 Kerrinnes Feb. 27, 1900 1,048,853 Muntzing Dec. 31, 1912 1,137,075 Morris Apr. 27, 1915 1,624,385 Bergen Apr. 12, 1927 1,772,262 Naugle Aug. 5, 1930 2,407,046 Vokes Sept. 3, 1946 FOREIGN PATENTS Number Country Date 385,590 Great Britain Mar. 24, 1931