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Publication numberUS32815 A
Publication typeGrant
Publication dateJul 16, 1861
Publication numberUS 32815 A, US 32815A, US-A-32815, US32815 A, US32815A
InventorsBenjamin Arnold
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 32815 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




Specification of Letters Patent No. 32,815, dated July 16, 1861.

T o all whom 'it 'may concern:

Be it known that I, BENJAMIN ARNOLD, of East Greenwich, in the county of Kent, in the State of Rhode Island, have invented a new and useful Improvement in Filters; and I do hereby declare that the following is a full and correct description thereof, reference being had to the accompanying drawings and to letters of reference marked thereon.

In the drawings similar letters refer to like parts.

The construction of my filter I will proceed to describe.

A, is a hollow spheroidal shaped elastic bulb or case.

a, Z), are valves, one of which, a, is made to open toward the bulb B, while the other, opens from it.

B, is a tube attached to the upper end of the bulb A.

C is the filter which intersects the tube B, or, as in Figure 2, is put inside of it which may be done by using an elastic tube which can be stretched so as to receive the filtering medium. The tube B is furnished at each end with a hollow screw c, that it may be attached to the bulb by either of its ends, so that the direction of the current through the filter C, may be reversed for the purpose of freeing it from the dirt, that may be collected from the fluid filtered.

D is a tube extending from the lower end of the bulb A, for the purpose of conducting the fluid to be filtered to the bulb. The filter C may be placed in this latter' tube (D), instead of B, if preferred, but it makes the action of the apparatus less certain and slower to depend upon the suction of the bulb, as we should in that case, to get the 'ferr-ed.

The mode of operation is as follows: The end of tube D being inserted into the fluid to be filtered, the bulb A is compressed by the hand and the air in it forced out through the tube B as the valve ZJ, which opens inward cuts off the passage through D. By allowing the bulb A to expand again the fluid is drawn up to fill the partial vacuum in the bulb, through the tube D, as the passage through B is closed by valve a, which opens outward. By again compressing the bulb the fluid in it is forced out through the tube B, and filter O valve o closing the tube D as before.

The shape of the elastic bulb or case A, may be varied as preferred without making a material alteration in the arrangement, and the substance of the medium of the filter O may also be varied.

I-Iaving thus described my improved filter what I claim as my invention and desire to secure by Letters Patent is- The arrangement of the elastic bulb A, with the valves a, b, filter O, and tubes B, D, substantially as described, and for the purpose herein set forth.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2828019 *Jan 7, 1955Mar 25, 1958Robert A LambertsonAquarium cleaning device
US2956507 *Dec 4, 1953Oct 18, 1960Clyde E HutchinsonAquarium cleaning device
US3365061 *Oct 4, 1965Jan 23, 1968Gulf General Atomic IncPortable reverse osmosis apparatus
US4443336 *Oct 4, 1982Apr 17, 1984Bennethum Mary LSurvival and water purification system
US4865065 *Oct 18, 1988Sep 12, 1989Cypress Medical Products Ltd.Height-adjustable crutch
US4872469 *Nov 22, 1985Oct 10, 1989Guardian Products, Inc.Crutch with stair deflector
US6022478 *Feb 3, 1997Feb 8, 2000Akzo Nobel N.V.Device and process for the substance-specific treatment of fluids
Cooperative ClassificationC02F1/283