US1597021A - Liquid combustible strainer - Google Patents

Description

= Aug. 24 1926.

V. DlRATZOUlAN LiQUID COMBUSTIBLE STRAINER Filed Feb. 6, 5

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UNITED STATES VAHAN nrim'rzoui'nu, or New YORK, NY. 1

LIQUID COMBUSTIB'L E STRAINER.

Application filed. February 6, 1925. Serial No. 7,198.

This invention relates to straining devices for removing foreign matter both solid and liquid from liquid fuel and has particular reference to a device applicable for insertion in the fuel feed pipe in a motor vehicle. The invention has for its object to provide a device which is equally applicable in connection with a vacuum fuel feed system as well as with those systems wherein the fuel flows by gravity. The invention also seeks to provide a device of the character described which is capable of effective operation not only in an upright position but also when its axis is at an inclination. The invention also has to do with the structural details of design in the interest of cheapness and ease of manufacture and facility of adaptation to a variety of arrangements of fuel feeding systems. These and other objects of the invention and the means for their attainment will be more apparent from the following detailed description of the invention taken in connection with the accompanying drawings illustrating a preferred embodiment thereof in which:

Figure 1 is a view in side elevation showing the straining device according to the resent invention, parts being removed in the interest of clearness.

Figure 2 is a view in perspective showing the strainer or cage adapted for use in connection with the present invention whereby a maximum straining area is availed of.

Referring to the drawings the fuel feed line from either a vacuum tank or a fuel reservoir is indicatedat a and the continuation thereof leading to the carbureter or similar device as indicated at b; Interposed in the line a, Z), is the straining device according to the present invention. The device comprises broadly a chamber 0 formed by a cylindrical portion 0 preferably formed of transparent material such as glass. The ends of the cylindrical wall portion 0 are adapted to be closed by end members or plates (Z, 6, respectively, plate d being removably secured to the intake pipe at and plate 6 being similarly secured to the outlet pipe 6. Preferably plates (Z and e are formed of pressed metal or the like whereof the peripheral portions d, e are offset to form seats for clamping bolts f, suitable apertures being provided in the respective plates to receive the bolts, and if desired, the respective edgesd and 6 may be turned inwardly in the interest of a neat and pleasing appearance. The joint between. the plates 65 and e and the cylinder 0 may be effectively sealed by a ring of yielding nonmetallic packing g, it, respectively. Centrally, plates (Z and e are ofiset as at (Z 6 respectively, .and are formedwith an aperture as indicated at elf, nipples i, j, being rigidly secured to the respective plates as by the clamping nuts '5, i and 9', 3' Secured in any convenient manner as by solder to the inner end of the nipple dis a short pipe section is, the inner end of which is offset from the axis of the strainer and the tube 70 extends downwardly within the interior of the chamber 0 to a point well beyond the mid-portion thereof and substantially for a distance equal to two-thirds the height of chamber 0. Extending inwardly of nipple 3' there is shown a tube Z similarly offset and also extending beyond the middle region of the chamber. considerably past the inner end of tube I Carried with the end of tube Z is a cage Z preferably formed of fine mesh copper wire which will permit the passage of gasolene therethrough but which will prevent the passage of impurities, solid particles or water. The cage is conveniently formed as a truncated cylinder in order that it may be disposed to one side of the axis of the straining device as illustrated in Figure 1 and will accommodate itself to the curved walls of the chamber. Obviously, however, the cage Z might conveniently be formed as a sphere although from practical considerations of manufacture the truncated cylinder will be found most advantageous.

In operation the straining device is inserted within the fuel feed line of either a vacuum feed or'gravity feed system and secured to the respective ends of the feed pipe a and b by means of couplings a, b, respectively. The couplings may be of such type that the ends of the pipe a and I), respectively, may be belled slightly and forced by means of the couplings against the curvilinear surface of the respective nipples i and By the use of such coupling elements the device may be readily accommodated to feed lines of varying diameter. The liquid fuel entering chamber 0 through the tube is from pipe a gradually fills the chamber until the upper level reaches cage Z. The gasolene passes through the fine mesh of the cage and exits through tube Z into the pipe 2) leading to the carbureter. Water and solid impurities being unable to pass through the fine mesh sink to the bottom of the chamher 0 Where they may be drawn ofi' from time to time through the pet cock m secured in an appropriate aperture in the plate 0. It will be apparent that the device is equally applicable when disposed in a vertical position or when so disposed that its principal axis is in a substantially horizontal plane. with such latter disposition the cage Z will, of course, be disposed in the upper portion of the chamber, the pet cock m being so positioned as to drain the lowermost portion thereof. By the provision of a cylindrical or substantially cylindrical or spherical strainer cage Z sufficient sieve surface is availed of at all times for adequate and complete straining of the gasolene, such impurities as may temporarily clog the apertures in portions of the sieve being insuflicient to render the device inoperative, there being always ample straining surface free for the operation of the device. The device is readily cleaned, easily inserted in existing fuel lines and is readily manufactured, assembled and disassembled with few operations and at a minimum cost.

Various modifications of the device just described Will occur to those skilled in the art and are deemed to be Within the scope of the invention, reference being had to the accompanying claim for an exact delineation thereof. I

What I claim is:

In a liquid fuel strainer, a transparent cylindrical vessel, an upper metallic closure for one end of the vessel formed with 'a central orifice, a lower metallic closure for the other end of the vessel formed with a central orifice, bolts engaging both closures, nipples disposed in the respective apertures in the closures and clamping nuts to retain said nipples therein respectively, means to engage said nipples respectively with the respective ends of fuel feed pipes, an inlet tube secured to the inner end of the nipple carried with the upper closure, a fuel outlet tube extending from the fuel inlet to a point within the chamber beyond its mid-portion and offset at its inner end with respect to the axis of the chamber, a fuel outlet chamber tube extending from the fuel outlet to a point within the chamber beyond its midportion and offset at its inner end with respect to the axis of the chamber, and

strainer cage carried with the end of the outlet tube within the chamber.

This specification signed this 4th day of February A. D., 1925.

VAHAN 'DIRATZOUIAN.

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