US2265278A - Fluid dispensing apparatus - Google Patents

Description

Dec. 9, 1941. M; J. GOLDBERG FLUID DISPENSING APPARATUS Filed April 10, 1940 5 Sheets-Sheet l Dec. 9, 1941. oLbagRG 2,265,278

FLUID DISPENSING APPARATUS Filed April 10, 1940 5 Sheets-Sheet 2 19d y r/7 /77 a z 17 jj J p Patented Dec. 9, 1941 FLUID DISPENSING APPARATUS Mark J. Goldberg, Spring Lake, Mich., assignor to John Wood Manufacturing Company, Inc., Conshohocken, Pa., a corporation of Delaware Application April 10, 1940, Serial No. 328,799

4 Claims.

This is a continuation in part of my copending application Serial No. 302,524 filed November 2, 1939, for Letters Patent of the United States, for an improvement in Liquid dispensing apparatus, and relates particularly to the construction and arrangement of a valve which is readily manually adjustable, from the exterior of the apparatus, to variably predetermine the fluid pressure at which the valve may be automatically opened. In that case, as in this, such a valve is shown embodied in apparatus through which gasoline, or other internal combustion motor fuel, may be metered and dispensed, by operation of a pump, and the valve is arranged to control a by-pass conduit from the pressure side to the suction side of such pump, and the adjusting means is arranged to be sealed in any position to which it is adjusted. However, my invention herein claimed may be embodied in any structure to variably predetermine the pressure at which a valve may be automatically opened by the pressure of fluid thereon, for instance gas or water.

My invention includes the various novel features of construction arrangement and method of operation hereinafter more definitely specifled.

In said drawings;

Fig. I is a partly sectional front elevation of such a fluid dispensing apparatus, as shown in my application Serial N0. 302,524.

Fig. II is a partly sectional side elevation of said apparatus; section being taken on the line II in Fig. I, in the direction of the arrow on said line.

Fig. III is a fragmentary sectional view. showing a modified form of the same valve adjusting elements as are shown in Fig. II, but on a larger scale.

In said figures; the casing I has the fluid supply inlet 2, leading into the screen chamber 3 containing the screen 4. The fluid passes through said screen 4 and out the remote end thereof in Fig. I, into the passageway 5 which leads to the pump chamber 6. The pump shaft 1, which is journaled in said casing I, carries the pump rotor 8, conveniently of the type which is mounted eccentrically in said pump chamber 6, and provided with a circumferential series of blades 8 which freely reciprocate in said rotor, so as to continually bear upon the inner cylindrical surface of said chamber 6 and sweep the fluid from said passageway 5 through said pump chamber 6 out into the pump discharge chamber I 0, and thence through the passageway II, into the control valve chamber I2. Said valve chamber I2 has the port I2 leading into the fluid discharge chamber I3, which port is closed by the spring pressed control valve I2 until a predetermined fluid pressure is attained by operation of the pump, sufiicient to open said valve; whereupon, the fluid escapes from the valve chamber I2 into the fluid discharge chamber I3 and thence through the fluid dispensing outlet I3 opening through the cover I a of said casing I.

Referring to Figs. I and II; the fluid passageway I I has the port II opening into the by-pass valve chamber I5, normally closed by the bypass valve IB under pressure of the spring I I3 shown in Fig. II. In order to variably predetermine the pressure at which said by-pass valve It will be automatically opened; I provide the abutment ring II for the outer end of said spring I6 loosely mounted upon the inner end of the axially adjustable screw I8 which is carried in the cover I 9, in screw threaded engagement therewith. Said cover I9 is rigidly secured over the outerend of said chamber I5, in fluid tight relation with casing I, conveniently by five bolts I9 As shown in Fig. II; said screw I8 is provided at its outer end with a single screw-driver slot I8. However, it may be provided with any other convenient form of wrenchhold. Screw I8 is secured in adjusted position by the lock nut 20 which is in screw threaded engagement therewith and provided with the polygonal wrench-hold 20*, so that it may be tightened against the surface I 9 of said cover I9, at the inner end of the socket l9 in which said nut 29 is fitted, as shown in Fig. II. The construction and arrangement are such that it is necessary for the operator to slightly unscrew said nut 20 whenever it is desired to axially adjust the screw I8 to vary the pressure upon said valve I6; and to hold said nut 20 stationary while such adjustment is effected. Whereupon the nut 20 may be again tightened to securely hold the screw IS in adjusted position.

In order to prevent unauthorized tampering with said means for varying the adjustment of the pressure on the valve I6, I provide said nut 20 with sealing means normally preventing access to screw I8. As shown in Fig. II, such sealing means conveniently consists of the screw plug 2I which is tightly fitted in the end of said nut 20 when the screw I8 is not being adjusted.

When said apparatus is used to dispense liquid, the inlet 2 may be connected with a subjacent liquid supply tank, by a conduit having a so In the form of my invention shown in Fig? III; the valve chamber cover 30 is provided with the same essential elements above described with reference to Fig. II, but the screw 31 has its threaded portion extending entir'ely through the cover 39, with the advantage that the'cover is more easily tapped to engagesaid screw-.-

Moreover, the screw 3| in Fig. III has the head 32 which is larger in diameter than thethreaded portion of the screw,'so that it projects over the internal shoulder34 at'the' inner end of the tubular lock nut 35 and serves to prevent accidentalremoval of that nut. As shown in Fig. III; the inner end of the screw 31 has the cotter piniii extending'through it and preventing removal-of the screw ,3] from the cover 38 and, consequently, preventing removal of the nut 35 by any manipulation thereof exterior to the cover. -However,'when the cover 30 is removed from the casing I, and the cotter pin 3P removed from the screw 31, both the nut 35 and the screw 3| may be readily removed from said cover.

Intheform of my'invention, shown inFig.

II, the sealing screw-plug2lnorrnally prevents access tothe interior of the tubular lock nut 28) and thus prevents adjustment oi the screw 18 until plug 2} is removed. -In'the form of my invention shown in Fig. III, the sealing screw plug 31 normally prevents access to'the interior of the tubular lock nut and thus prevents adjustment of the, screw -3l until said plug 3! isremoved. However, as an additional precaution against unauthorized change of the adjustment of 'the valve l6, by axial movement of said screw 3l, I prefertod-rilla; hole 3! through'the head of the sealing plug '31, asshown in'jFig. III, to receive thesealing wire 22 which is looped through the hole 212 in the cover 3i], and has both of its ends secured in thelead or other soft metal seal 22*, which is tightly pinched thereon; so that itis impossible to remove the screw'plug 31 unless and until the sealing wire 22 is broken. The latter construction and arrangement is advantageous in that it normally prevents any change in theadjustmentof the valve spring, and, if any unauthorized adjustment of the screw 34 is eifected, it is manifested by the fact that the sealing wire 22 is broken. -Any other'suitable filament may be substituted for said wire.

' In gasoline dispensing apparatus, as ordinarily constructed, the dispensing outlet l3 from the casing I, is connected with a conduit including, at'its distal end, a flexible dispensing hose having, at its discharge end, a nozzle normally closed by a spring pressed check valve which must be manually opened to effect any dispensation. In such an embodiment, adjustment of screw I8 prepriming liquid to pass from said inlet IQ through by-pass l5 and passageway 5 into the suction side o f the pump chamber 6 during each pump priming operation,

However, I do not desire to limit myself to the specific construction, arrangement, or method of operation of my invention chosen for illustration, as it is obvious that various modifications may be made therein, without departing from the essential features of my invention, as defined in the appended claims.

I claim: 7

1. The combination with a casing including a valve chamber having a port between a fluid inlet and a fluid outlet; of a cover for said chamber, removable from the exterior of the casing; screw means normally rigidly connecting said cover with said casing; a valve at said port; a spring arranged to continually stress the valve toward its closed position; an adjusting screw, extending into the chamber and having its outer end threaded through said cover; an abutment carried by the inner end of the screw bearing on the outer end of the spring; a tubular lock nut having an internally threaded end engaging the outer end of said screw, said lock nut extending beyond the outer end of the! screw and having its inner end arranged to bear upon the cover and lock the screw in adjustedposition; wherein the outer end of the adjusting screw is larger in di ameter than the bore of the internally threaded end of said nut, and prevents removal of the nut while the screw is engaged with the cover; and

; the inner end of the screw carries means prevent ing removal of the screw from the cover, until'the cover is removed from the casing.

2. A structure as in claim 1; wherein the means preventing removal of the screw irom the cover is a pin extending transverselythrough the screw at its inner end, adjoining the abutment.

, 3. A structure as in claim- 1; wherein the tubuiar lock nut has at its outer end sealing means normally preventing access to the adjusting screw and including a screw plug in said'tubular nut having a hole extending transversely through it exterior to said nut, a sealing wire extending through said plug hole and engaging said cover; and a soft metal seal tightly engaging both ends of said wire.

4. A structure as in claim 1; wherein the outer end of the tubular nut is provided with removable sealing means, including a screw .p-lug normally through to the adjusting screw.

MARK J. GOLDBERG.

Images