US2422735A - Automatic cleaning means for filters - Google Patents

Description

June 24, 1947.

Franz AUTOMATIC CLEANING MEANS FOR FILTERS Filed'Feb. 16, 1944 L; E. LA GUARDIA 2,422,735

2 She ets-Sheet 1 FIE-$ 2 Sheets-Sheet 2 :5 Fir-E. EA:

.45! I if 6 i? i All A w n W L. E. LA GUARDIA Filed Feb. '16, 1944 AUTOMATIC CLEANING MEANS FOR FILTERS June 24, 1947.

Patented June 24, 1947 AUTOMATIC CLEANING'MEANS FOR FILTERS Louis E. La Guardia, New York, N. Y. Application February 16, 1944, Serial No. 522,542

4 Claims.

1 This invention relates to that type of filter employing a filter element of annular form and adapted for the passage of liquid interiorly to an area where the clear liquid may be drawn off. The specific object of the invention is to provide means actuated by the liquid itself for action upon the entrant surface of the filter medium to remove sediment or organic material collected upon said surface in the customary use of the filter.

The invention will described with reference to the accompanying drawings, in which- Fig. 1 is a view in elevation, partly broken away showing an embodiment of the invention.

I Fig. 2 is a vertical section through the structure shown in Fig. 1.

Fig. 3 is a fragmentary plan view, partly in section on the line 3-3, Fig. 2.

Fig. 4 is a fragmentary view, partly in section on the line 4-4, Fig. 2.

Fig. 5 is a fragmentary vertical section on the line 5-5, Fig. 2. Fig. 6 is a fragmentary horizontal section on the line'66, Fig. 2.

Fig. 6A is a horizontal section on the line 26 6A6A, Fig. 2.

Referring to the drawings, it will be seen that the embodiment illustrated is made up of the following instrumentalities: An annular base plate I is formed with an axial aperture and provided at the top with a packing ring 2. Engaging the packing ring is a casing 3 of any suitable material, preferably glass. Closing the casing at its top is an annular plate 4 provided with a packing ring. 5 which abuts the top of the casing 3.

Within the aperture of base plate I projects a hollow tubing 6 formed with a plurality of apertures 1. This tubing at its top is provided with a head6 having a flange 6 Mounted upon head 6 is a rotary connecting turbine hub 8 at the center of turbine wheel 8 having blades 9. This hub rotates about a stud shaft I threaded in head 6 the stud being carried by a flanged liquid inlet member II withina casing I2, the latter having an upwardly projecting hollow threaded connection I2 which extends through top plate 4 and receives nut I3, member I2 being shouldered to abut the inner face of plate 4. Secured to the base of easing I2 is a lower closure plate I4.

Closure plate I4 is formed with an axial aperture which receives connecting disk I for an upper turbine wheel I6. The hub of the lower turbine wheel, the connecting disk, and the hub of the upper turbine wheel, may be connected by pins IT. The connecting disk and upper turbine wheel will, of course, rotate about stud shaft III.

The tubular filter element I8 may be of natural stone or composition and it is held between an upper disk IN and a lower disk I9 mounted on hollow tubing 6.

The lower disk is associated with a, flanged extension I9 surrounded by a spring 20, which wire or other material as to its bristles, and the brush is held into light contact with the filter element I8, since the brush holder is connected by members 3|, 3I with spring press washers 2 I, 23, as shown more particularly in Fig. 1.

The base plate I is apertured to receive a fluid outlet valve as indicated schematically by the valve 28. The opening for fluid through the valve should be adequate to cause a rapid flow of fluid through the turbine wheels and valve for rapid rotation of the brush relatively to the filter element. V

In the operation of my apparatus, the valve 28 will normally be closed. The threaded upper end of the apparatus is hollow and may be attached to a water supply pipe. The water enters the device and flows as indicated by the arrows, the flow being first into casing I2, and through lateral apertures through member II to the up- 0 threaded and may be attached to a pipe line leading to a suitable valve or faucet.

It will thus be seen that whenever valve 28 is closed, the filter will have normal operation and that the brush will not rotate.

When valve 28, which, as stated, will in practice disk I4 and directly against the blades 9 of the lower turbine wheel 8 as indicated in Fig.

wherein one of the inclined apertures is shown at M The liquid thus will, in its rapid 'flo'w, rotate both connected turbine wheels inasmuch as the latter carry the brush holding elements, the specific carrying member being the lower turbine wheel. The lower coil spring 20 exerts a slight pressure on the lower washer 21 and the upper coil spring 22 exerts aslig-ht pressure on the upper washer 23. When the washers are rotated by the rotation of the brush frame 24, the washers being connected to the brush holder 26 by the members 28, the vpressure of the coil springs causes a drag on the washer rotation which exerts a pull on connecting members '28 to cause the pivotly mounted brush holder 26 to be pressed --aga'inst the outer suriace of the filter casing and co-axial therewith through which the water percolates, a perforated central tube disposed within the filter element and means supported thereby adapted to support the ends of the filter element, a brush extending over the length of said filter element, a frame carrying said brush and rotatably mounted on said central tube, an outlet in the casing and communicating with the tube for discharge fof filtered water and an independent outlet for unfiltered water, the combination of an upper turbine wheel within the casing above the central tube, a separate housing therefor, a spindle extending through said housing and secured to the upper end of th central tube, a lower turbine wheel within the casing and mounted on the upper end element l8. When the outer casing 3 is made of of the elements illustrated in the drawings and constituting the embodiment ofthe invention just described, without departing from the spirit of the invention.

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

1. In a filter of the type described consisting of a casing and tubular filter element therein through which the water percolates, a perforated central tube disposed within the-filter element, a brush extending over the length of said filter element and a frame carrying said brush and rotatably mounted on said central tube, and an outlet for filtered water at an end of said control tube and an independent outlet for unfiltered water, the combination of a turbine housing in the top area of the casing above said tube,

a spindle extending through the bottom of the turbine housing and secured to the upper end of the central tube, a turbine whe'el within said housing having peripheral vanes, means for connecting the brush frame to the said turbine wheel, said turbine housing having a water inlet at its top and apertures disposed at its bottom and said brush frame having means at its top adapted to be impelled for rotation by the streams from said apertures.

2. In a filter of the type described consisting of a casing, a tubular filter element within the of the said brush frame in underlying relation to the housing 'of the upper turbine wheel, said housing having a water inlet at its top and apertures disposed at its bottom and adapted to direct water jets against the vanes of said-lower turbine wheel and thereby to increase the rotating movement of the brush frame.

3. A filter constructed in accordance with claim 1 including, at each end of the filter element, a disk secured to and for supporting the end of said filter element in concentric relation to the central tube, a flange member secured to said central tubein spaced relation to said disk, -a washer mounted for rotation on said flange membenacoil spring interposed between said disk and washer and means to connect said washer to the brush holder to control the action thereof upon the filter element. 7

4. A filter constructed in accordance with claim 1 including, at each end of the filter element, a disk secured to and for supporting the end of said filter element in concentric relation to the central tube, a flange member secured to said central tube in spaced relation to said disk, a washer mounted for rotation on said flange member, a coil spring interposedbetween said disk and washer, said Washer having a flexible connection to the brush holder whereby, upon rotation of the frame, the pressure of 'said 0011 spring against the washer imposes a "drag on the Washer rotation to effect a uniform pressure of the brush against the outer surf-ace of the filter element. a

. LOUIS E. LA GUARDI-A.

REFERENCES err-ED The following references are of record in the file of this patent:

Images