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 numberUS375798 A
Publication typeGrant
Publication dateJan 3, 1888
Publication numberUS 375798 A, US 375798A, US-A-375798, US375798 A, US375798A
InventorsFrederick Buchhorn
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 375798 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)




SPECIFICATION forming part of Letters Patent No. 375,798, dated January 3, 1888.

Application filed August 25, 1887. Serial No. 247,875. (No modeLll .To all whom it may concern.-

Be it known that I, FREDERICK BUGHHORN, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Water-Filters, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to filtering apparatus adapted to be coupled to any hydrant-faucet for filtering the water as it is used, and it has for its object to provide such an apparatus that will be self-cleaning of all impurities separated from the waterwhile passing through it; and with that object in view my invention consists of the novel devices and combinations of devices, hereinafter described and specifically claimed.

InY the accompanying drawings, Figure l represents a vertical section through the center of the apparatus; Fig. 2, an elevation of the inside tube and perforated diaphragms detached; and Fig. 3, a bottom view of the apparatus, the screw-nozzle being removed.

Corresponding letters designate like parts in the several figures of the drawings.

A denotes the cylindrical casing provided with caps B and C, screwed upon the ends thereof. The cap B has acentral screwneck, b, for coupling it to the screw-threaded spout end of a common faucet, D, a rubber ring, a, being interposed between a shoulder inside of the screw-neck b and the end of the faucetspout for forming a hermeticjoint. The bottom cap, C, is also provided with a central screw-neck, c, to which is coupled, by a collarnut, d, a nozzle, E. Against an annular shoulder inside of screw-neck c is placed. a rubber ring, e, and against this rubber ring e is iuserted a metal disk, F, being notched on its edges and bottom to provide. small chanuelsf. This disk F rests with its under edge upon the upper end of nozzle E, and has a stem, g, that extends through rubber ring e upward into casing A. By tightening the coupling-nut d the disk F will be forced against rubber ring e, so as to form a hermetic joint therewith. By closing channels f no watercan escape therethrough; but by loosening the nut d the passage of water through these channels f into nozzle E can be adjusted to be more or less.

A tube, G, is inserted into casing A,with its lower end resting upon rubber ring e. This tube G has secured a perforated diaphragm, H, the diameter of which is equal to the diameter of the bore of the casing, and which when the tube G isplacedin position will be ashort distance above cap C, resting with its downwardly-curved periphery upon suoli cap C. The tube G also has a collar, t', near its upper end, upon which is placed a washer-shaped perforated diaphragm, I, the diameter of which is also the same as the bore of casing A. This diaphragm I is held in position by a conical rubber ring, J, placed over the upper end of tube G and resting with its lower end upon the diaphragm I and collar t, and bearing with its upper end against the under side of cap B, so as to form a hermetic connection between screw-neck b and tube I. The lower end of tube I, below diaphragm H, is vertically slotted, or it may be perforated with holes for providing communication between the interior of tube I and the space between diaphragm Hand cap C. Agoose-neck pipe, K, being the escapespout for the filtered water, is tapped into cap B.

The cylindrical space between tube G and casing A and between diaphragmsH and I is filled with gravel, sand, or charcoal, or with any other suitable ltering material.

The modus operandi of the apparatus is as follows, to wit: The coupling -nut d being sufficiently loosened, so as to allow a limited escape of water through nozzle E, and the faucet D being turned open, the tube G will be filled with water, which, passing through the slits or perforations in the bottom end of said4 tube and entering the space below diaphragm H, will rise through the filtering material, and will thence escape through pipe K. The impurities of the water will collect in the space below diaphragm H, and after shutting faucet D the water contained iu the apparatus will leak through channels f and nozzle E, washing with it all impurities separated with each draft of water through the filter. Thus the apparatus will be continuously self-cleaning.

The casing of this apparatus may be made globular, instead of cylindrical, shape.

l. In a filter of the kind described, the combination of a filtering-chamber having ascrewthreaded'extension on, and a disehargepipe, K, connected to, its upper end, a central open l I, set over the tube G at bottom and top, and

a notched disk, F, packing-ring e, and nozzle tube, G, having the perforated diaphragm II E, secured to the neck on the lower end of 15 upon its lower end over the bottom of the filter chamber7 and the perforated diaphragm and rubber ring J, surrounding the top of the tube, said ring lying between the diaphragm I and top of the chamber, as set forth.

2. The combination of casing A, having the Screw-threaded necks b and c and the pipe K at the top thereof, the tube G, perforated at its bottom, the perforated diaphragms H and the casing, substantially in the manner and for the purpose set forth.

In testimony whereof I afix my signature in presence of two Witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4604202 *Dec 26, 1984Aug 5, 1986Amcor Ltd.Filter apparatus
US4895646 *Jun 20, 1988Jan 23, 1990Willinger Brothers, Inc.External aquarium filter
Cooperative ClassificationC02F2307/06