US1922656A

US1922656A - High pressure discharge unit

Info

Publication number: US1922656A
Application number: US369695A
Authority: US
Inventors: Albert E Berdon
Original assignee: AC Spark Plug Co
Current assignee: Delco Electronics LLC
Priority date: 1929-06-10
Filing date: 1929-06-10
Publication date: 1933-08-15
Anticipated expiration: 1950-08-15

Description

Aug. 15, 1933. A. E. BERDoN HIGH BRESSURE DISCHARGE UNIT Filed June l0, 1929 Patented Aug. 15. 1933 UNITED STATES PATENT OFFICE HIGH PRESSURE DISCHARGE UNIT Albert E. Berden, East Orange, N. J., assigner to A C Spark Plug Company, Flint, Mich., a Com- Dany of Michigan This invention relates to means and methods for promoting the advance of liquids, such as engine fuels containing limited quantities of absorbed or-entrained air and/or vapors, through pipes `connected with reciprocatory pumps, or the like; and itY is" aparticular object yof this invention to provide, for the general purpose referred to,V a simple and inexpensive device adapted to be incorporated in or attached at .or near to the inlet or the outlet from a fuel pump, or the like, and to collect and retain air and/or vapors from the pumped fueL-in such manner as to provide a self-replenishing air dome and thereby substantially to enhance the efficiency of the pumping system in which said device may be included.

A device somewhat similar to that upon which protection is herein sought has been described 2/0 and claimed in my pending application Liquid fuel feed system" Serial No. 243,781, filed December 3l, 1927; but the present invention differstherefrom in numerous details, being de- .cidedly simpler and entirely suitable for use at comparatively high pressure,-although resem= bling the mentioned prior device in its 'general principle of operation. It is believed that the embodiments herein describedmay satisfactorily illustrate both the general principles referred to, in their generic aspects,land the range of utility of such devices in connection with intermittently acting means for advancing a liquid.

Other objects of the present invention, which need include but one or two parts (said parts being preferably radially symmetrical with reference to alongitudinal and preferably substantially vertical axis or line of advance of the pumped liquidv therethrough, and being preferably provided with separable connecting means such as a male thread at one end and a female thread at the other end, in such manner as to permit of the direct and easy insertion of the device in a fuel feed or fuel delivery line) may be best appreciated vvfrom the following descriptions of illustrative embodiments of the present invention, taken in connection with the appended claims and the accompanying drawing.

Figure 1 m'ay be regarded as a median vertical vsection through an embodiment of the present invention as applied to a pump outlet which extends in a horizontal direction,-one element ofy this device being adapted to serve as an elbow.

Figure 2 is a corresponding viewjof an alterna- Itive form lin which parts are shown partially in bodiments of this invention.

Referring rst to certain details common to the forms shown in Figures 1 and 2, an outer cylindrical chamber element 11 or 11' is shown as provided with a female thread at l2 or 12', suitable to receive a pipe 13 or 13', which may be connected with the float bowl of a carburetor. or the like, not shown; and an inner conical and downwardly iiaring and bubble-collecting bell element 14 or 14' is shown as so intertting within the said cylindrical element as to provide a bubbleg-passing clearance at the lower edge l5 75 or 15' of said bell,-enabling bubbles, such as may form and coalesce upon the interior of said bell (by reason of the downward expansion and inclination of its walls) peripherally to escape past the mentioned edge and to rise into an

annular chamber

16 or 16,Whose inner and outer walls are respectively provided by said bell and by said cylindrical element. The mentioned elements may be interconnected by any suitable means, such as a female thread, shown as provided at 17 or 17' within the upper end of the cylindrical element, and a male thread. shown as provided at 18 or 18', upon a rbody 19 or 19', integral with said bell,-said body being shown as provided with an annular'channel 20 90 or 20', upwardly terminating the bubble-receiving

chamber

16 or 16 and enlarging the same.

In the form shown in Figure 1, the body 19 has the form of an elbow through which extend .passages 21 and 22, the former being co- 95 axial with the bell 14 and the latter extending into a projection 23, .shownas 'provided at 24 with a male thread, suitable for engagement within a corresponding thread provided in an outlet from a fuel pump 25, including a reciprocatory diaphragm, or'the like.

In the form shown in Figure 2, the extension 23' is shown as co-axial with the bell 14', the entire device being radially symmetrical with reference to its longitudinal axis and the male thread at 24' being suitable to cooperate with a corresponding thread in a downwardly extending outlet from a reciprocatory pump 25', or the like.

In perfecting devices of the described types, it

may usually be advantageous to form the same in two parts, and frequently advantageous to obtain the desired bubble-passing clearance, at the lower edge 15 of any downwardly expanding element such as the bell 14, by providing, opposite said edge, a groove or channel 26 or 26';

. and incidental weakening of the lower elementl may be obviated by externally providing a noncircular or other wrench-engageable reinforcement as suggested at 27 and 27'. This reinforcement may have substantially the same outside dimensions as a corresponding wrench-engageable'reinforcement 28', optionally provided upon the body 19 or 19,-whether the bell isformed integral therewith oras a separate tubular thimble gripped between the threaded members refererd to or otherwise held (as in specic forms illustrated in the mentioned prior appli-` cation).

In operation, as above implied, both a peripheral slowing of the stream of pumped liquidY and a succession of impulses therein are favorable to a gradual separation of bubbles from an outer and slow-moving zone; andthe slope of the interior of the bell, or that of any preferred element providing downwardly divergent walls so disposed as to ',eifect a progressive retardation at the periphery of a stream directly'advanc'ing therethrough, is intended to be such of the resultant self-replenished bodyof entrapped gas and/or Vapor serves to produce an even flow beyond said bell,-maintaining the advance of the pumped liquid during intervals wherein an adjacent, Valve 'of the mentioned pump, in the case illustrated, may be entirely closed. The use of these devices is found particularly advantageous at the outlets of fuel pumps; but it should be understood that, if desired, -either -the bell-including element or the cylindrical or other chamber element may be formed integral with a pump or pump part, ac-

cording as the device is to be employed separately or at the outlet opening or the inlet opening of a pump. For example, itis suggested in Figure 3 that a vapor-receiving chamber element 11a serve incidentally to retain inlet valve spring` 29a; and a bell element 14h is shown as wholly interior andsimilarly holding an outlet valve spring 29h of a pump 25ab, including a reciprocable diaphragm 30ab.

Although I have herein described but two separable and two built-in embodiments of the present invention (annular chamber 1Gb being formed directly in the pump body) it should be understood not only that various features thereof may be independently employed, but that other angular and special modifications of said' invention, adapted to be used under different conditions and in connection with a feed line 30a and/or a delivery line 13, 13' or 13b, might easily be devised, without involving in the slightest departure from the present invention. For example, liquid fuels ordinarily contain both 4low-boiling vapors and air due to exposure and/or splash in a tank; but it. would be Within the scope of the present invention, in the absence of l.these conditions, to providefor or permit (by leakage in connection with indicated gaskets or otherwise) for a sufficientadmission oflair into the fuel line to assurel operation in-`V the ldescribed mannenwith very marked and favorable effects upon the efficiency of the fuel pump and/or any system in which the present invention is employed. In any case, when an adjacent valve is closed, the liquid may advance in consequence of an acquired momentum and/or by reason of the pressure of the Ientrapped air and/or vapor; thse devices may be used with some advantage in any stveams containing air or vapors; and the pitchof the disclosed bells, as well askthe direction in which they expand, may naturally depend `upon not only the direction but the l"rate of 'advance of the liquidwhether such advance is -producedby pulsating or other means. i

1. In an auxiliary device suitable for use in proximity to parts of a reciprocatory pump for liquid fuel: a downwardly expanding bell element provided with an inlet opening to its inerior at the top thereof; and an annular chamber element surrounding said bell and extending above and below the lower edge thereof and having an outlet opening below said edge and arranged in line with said bell, and which opening is of greater area than the lower end of said bell, to receive and entrap above said edge bubbles outwardly separating from the pumped liquid during its descent through said bell and outlet opening.

2. In an auxiliary device suitable for use in proximity to parts of a reciprocatory pump for liquid fuel: a downwardly expanding element provided with an inlet'opening to its interior at the top thereof; and an annular chamber element surrounding said downwardly expanding element and extending above the lower edge thereof to receive and entrap bubbles outwardly separatingfrom the pumped liquid dur.- ing its descent through said4 bell,-said chamber element having a threaded interconnection with an enlarged portion of said belly element above the lower edge thereof, the latter forming a cover for the former.

3. In an auxiliary device suitable for use in proximity to parts of a reciprocatory pump for liquid fuel: a downwardly flaring bell element provided with an inlet -opening to its interior at the top thereof: and an annular chamber r^`element surrounding said bell element and extending above the lower edge thereof to receive and entrap bubbles outwardly separating from the pumped liquid during its descent through said bell,-said bell element being upwardly and outwardly shaped, externally thereof, to form a cover for said chamber element and cooperate therewith in providing an annular chamber serving as an air dome.

4. In an auxiliary device suitable for use in advancing liquid fuel: a bell element provided with an inlet; and an annular chamber element surrounding said bell element and extending above the lower edge thereof and having an enlarged chamber adjacent said lower edge to receive and entrap bubbles outwardly separating from the pumped liquid during its advance through said bell,-a bubble-passing constriction being .provided between said lower edge of said bell and said annular chamber element; and an outlet leading from said enlarged chamber above and below the lower edge of said conical element and adapted to receive said bubbles and entrap the same above said, edge; and thereby to provide self-replenishing elastic means for enhancing the ow of said liquid and said chamber element below said edge being enlarged and converging to an outlet opening for said liquid.

ALBERT E. BERDON.