Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS590968 A
Publication typeGrant
Publication dateOct 5, 1897
Publication numberUS 590968 A, US 590968A, US-A-590968, US590968 A, US590968A
InventorsJohn Davis
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 590968 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

2 Sheets-Sheet 1. J. DAVIS. FILTER (No Model.)

No. 590,968, Patented Oct. 5,1897.

- Unitas STATES Farnwr (Enr ca,



SPECIFICATION forming part of Letters Patent no; 590,968, dated Oetober 5, 1897.

Application filed-Tannery 28, 1897., Serial No. 6 2l,0 86.- (No model.)

To all whom it may concern:

Be it known that 1, JOHN DAVIS, a citizen of the United States,-residing at Allegheny,

in the coun ty of Allegheny and State of Pennsylvania, have invented certain new and usewill enable others skilled in the art to which,

it appertains to make and use the same.-

My present invention relates to filtersof the class known as Pasteur filters, and has for its object certain improvements in con-- struction, which will be fully disclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification, Figure 1 represents a vertical section of myimproved filter; Fig. 2, a top plan View of the frame which supports the filtering-bodies; Fig. 3, alike view on the line 3 3, Fig. 1; Fig. t, an inverted plan of the'upper head of the frame; Fig, 5, a plan of the lower head of the frame; Fig. 0, a vertical section, on an enlarged scale, of the upper part of the frame and the filteringbodies: and Fig. 7, a like view of the lower part of the same.

Reference being had to the drawingsand the letters thereon, A indicatest-he body or casing of the filter; B, the detachable cover; 0, the supplypipe D, the discharge-pipe for filtered water, and E the pipe for discharging dirty water in cleansing the filter.

lVithin the casing is a frame composed of an upper cylindrical metallic head F, on the inner or under side of which are two annular and concentric grooves or seats a b and a lower head G, on the inner or upper side of which are two annular and concentric seats 0 d directly opposite the seats cab in the upper head, and. on the periphery of the head G are lugs c e e 6, provided with vertical flanges ffff, by which the head is secured to the body or casing of the filter by suitable bolts. Between the lugs e e are openings 9 g g g, and through the head are openings h h h h for the passage of water from the annular precipitating-chamber H to the chamber I through the openings g and from the sediment-chamber I to the chamber K through the openings h.

L indicates the outer annular filtering-bod y,

made of porous stone or composition; and M i the inner annular filtering-body of the same material and concentric to the outer body.- The upper ends of the filtering-bodies engage the groovesor seats a b in the upper head F of the frame, and the lower ends engage the materiahand between the two filtering-bod V ies is formed an annular storage-chamber N for clear water, which has been filtered by passing through the walls of the two filteringbodies from the precipitatingchamber H through the wall of the body L and from the chamber K through'the wall of the body M.

To remove theimpurities which accumulate upon the periphery of the filter-body L and the inner'surface of the casing, a revoluble brush Z is inserted in the chamber H, supported upon an arm m and revolvedby a pinion 'n, which engages an idler 0, interposed betweenthe pinion n and the annular fixed gear-wheel p, secured-to the upper side of the head F. The inner end of the arm m engages the shaft 0 and is revolved by the crank 19'. The brush Z has an axial as well as an orbital motion imparted, and by having the two motions and by giving a reversed m 0- tion to the brush with the idler 0 much time is saved in cleaning.

To clean the inner surface of the wall of the body M, brushes (1 q are adjustably secured to the shaft 0 in the chamber K, and

to remove the sediment from the bottom of the sediment-chamber I a brush r is attached to the lower end of the shaft 0. Thus as the shaft 0 is revolved by the crank 13 all the .brushes are put in motion and the several parts of the filter cleansed, the impure water flowing off through the pipe The chamber K is provided with a removable cover 8, through which the shaft 0 passes, and may be provided with vertical passages for water to enter chamber K, and the cover B with a stuffing-box t for the shaft 0.

Pindicates an air-pipe which extends to the upper end of the clean-water-storage chamber N and is provided with an automat ically-opera'ted float-valve u to supply air to the filter. The air-pipe P also allows air to escape as the cleanrwater-storage chamber N is being filled, and when the clean-water chamber is nearly full of water the float-valve will close,and the air-above the water becomes compressed in the upper end of the chamber by the further vrise of the water, so that if more clean water is wanted at any time than which the heavier impurities gravitate into the sediment-chamber I. relieved of its heavier impurities passesinward through the Wall of the filter-bodyL, into, the chamber N, and the water rising; from thecham ber I through openingh in. the

head G fills chamber K and passes outward. through the wall of the filter-body M int-o chamber N, from which the filtered water is.

discharged through pipe D.

Having thus fully described my invention, what I claim is 1.. A filter provided with an outer casing, annular and concentric porous filteri-ng-bodies, a. receiving and precipitating chamber bet-ween the casing and theouter-filteringbody,a sedimentchaniber below the filteringbodjies, an; annular clean-water-storage chamber between the filtering-bodies, adischarge pipe at the lower end of the storage-chamber,

achamber in the inner filtering-body and openings or passages connecting said chamher and the sediment-chamber, in combination with means for removing impurities from thefiltering-bodies and from the bottom 0 the sediment-chamber.

2. A filter provided with annular concenheadscontaining annular grooves on their inner surfaces to receive said filtering-bodies, passages around and in the center of the lower head and lugs. for securing said head to. the casing, in. combination with. revoluble brushes. connected to a central shaft and operating to remove impurities from the filter-- v ing-bodiesand from the sediment-chamber. The water thus.

3. A filterprovided with annular and. con,-

-centric porous filtering-bodies, a storagechamberbetween the bodies, an air-supply pipe in said chamber extending to-the upper end thereof and. having anau to matically-operated float-valve, in combination with a receiving andprec-ipitating chamber and asediwent-chamber in communication therewith.

In testimonywhereof I affix my signature in presence of two witnesses.




tric porous filtering-bodies,,a frame having

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2572131 *Sep 21, 1950Oct 23, 1951Neenah Milk Products CompanyStrainer
US2714455 *May 18, 1953Aug 2, 1955Neenah Milk Products CompanyStrainer
US3211292 *Oct 21, 1963Oct 12, 1965Michigan Dynamics IncStrainer with concentric filter elements
US3428181 *Jan 28, 1966Feb 18, 1969Cyril R LevisYieldable filter element cleaning
US5670043 *May 17, 1996Sep 23, 1997Coors Brewing CompanyMulti-function self-cleaning fluid treatment system and method for using the same
US7837875Aug 29, 2006Nov 23, 2010Eaton CorporationFluid filter
US20070108117 *Aug 29, 2006May 17, 2007Wim CallaertFluid filter
Cooperative ClassificationB01D17/045