US1883843A - Liquid dispensing nozzle - Google Patents

Description

Oct. 18, 1932. J c, RD 1,883,843

LIQUID DISPENSING NOZZLE 7 Filed Jan. 21. 1932 L/OSEPH C IVoooroez; BY W Patented Oct. 18,"1 932 l UNITED STATES PATENT; OFFICE:

JOSEPH c. woonronn, or ARDMORE, PENNSYLVANIA, AssIeNoP. ro IERVIGE srArIoN EQUIPMENT COMPANY, or CONSHOHOCKEN, PENNSYLVANIA, A CORPORATION or DELAWARE LIQUID DISPENSING NOZZLE Application filed January 21, 1932. Serial No. 587,899.

My invention relates to nozzles particularment is efiected with less leverage and consepressed ly adapted for dispensing gasolene under control of a valve in the nozzle, normally closed by a spring and pressureof the liquid to be dispensed through the nozzle but adapted to be manually opened by a lever fulcrumed on the nozzle. In such nozzles valves, more power is required to initially lift the valve from its seat and to prevent its too sudden closure under the combined pressure of the valve spring and the comliquid than is required to move it throughout the other portion of its range of movement; and it is desirable to effect both the closure and the unseating of the valve and displacement thereof towide open position with the minimum amount of movement of the lever and exertion on the part of the 0perator. Ordinarily, such nozzle valve'operating levers are ofconstant leverage; the fulcrum thereof being fixed with respect to the nozzle. However, such construction and arrangement is disadvantageous in that if the leverage is such as to permit the operator to apply the power necessary to unseat the valve and control its closure without fatigue, the

to displace the valve to greater than can be coneifected by the operator my invention range of movement w1de open position 18 without fatigue. Therefore,

provides such a valve with an operating lever of the second order having its fulcrum end so shaped that in its normal idle position with the valve closed, the fulcrum point is closer to the valve operating stem to which the power is to be applied than when the valve has been displaced by said lever to its wide open position; the arrangement being such that the distance of the fulcrum from the axial line of said stem increases from the be ginning to the end of the valve opening 'movement of said lever.

displacement of bined pressure of The effect of that arrangement is that greater leverage is afforded at the beginning of said opening operation to facilitate the the valve against the comits spring and the liquid than during the subsequent opening movement, and such subsequent opening movewhich valve is mg my invention,

quent greater proportion of movement of the stem with respect to the movement of the lever than at the beginning of said operation.

different points of the periphery of which successively contact with said frame as fulcrum points progressively receding from the axis of the valve stem.

My inventlon lncludes the various novel features of construction and arrangement I hereinafter more definitely specified.

In said drawing; Fig.1 is a fragmentary plan view of a nozzle conveniently embodyv the tubular discharge end thereof being broken away.

Fig. 11 is a fragmentary vertical sectional view taken on the line 11, II, in Fig. I in the direction of the arrow marked thereon.

Fig. III is a fragmentary sectional view taken on the line 111, III, in Fig. 11, showing the construction and arrangement of the lever guide pin and the slotted portion of the nozzle frame in which it is engaged.

In said figures, l is the tubular nozzle casing,conven1ently formed of cast bronze, having the wrought metal conduit 2 of any convenient length and shape rigidly connected therewith by the screw thread 3 and solder joint 4.

baid casing 1 has the valve seat 6 for the valve 7 which conveniently includes the annular body 8 of resilient material which is slightly compressible on said seat. Said an 5 nular body 8 1s detachably connected wlth the 9 fitted in said casing 1. Said cap forms an abutment for the spring 14 which bears upon said valve 7 continually tending to close it in the same direction it is pressed by the liquid which is to be dispensed through said nozzle in the direction of the arrow shown in Fig. II; The outer end of said stem 9 is mounted to reciprocate in the stufling box 16 which has the screw thread 17 rigidly engaging said nozzle 1. Said stuffing box is conveniently inserted through the valve seat 6 and has its inner end transversely slotted at 18 for engagement with a wrench by which it is set in the position shown. Said stuffing box includes the packing 20 adjustably compressed by the gland 21 carried by the screw cap 22.

The outer end of said valve stem 9 projects in cooperative relation with the valve operating lever 24 which is of the second order, having its fulcrum end-25 curved as a cam for progressive fulcrum contact with the inner curved surface 26 of the guard frame 27 which is. conveniently cast in integi al relation with said nozzle 1.

As best shown in Fig III, the fulcrum end 25 of said lever 24 is bifurcated so as to extend upon opposite sides of the lug 29 on said nozzle guard frame 27, and the pin 31 which is conveniently riveted through the bi- 80 fur-cations 25 of said lever 24 is engaged in the slot 32 which extends in said lug 29 substantially parallel with the axis of said stem 9. I find it convenient to extend the free end 34 of said lever 24 through a slot which 35 is indicated at 35 in said nozzle guard frame 27 to maintain said lever 24 in registry with said valve stem 9 through the range of its movement from the normal idle position shown to the opposite limit of said slot 35 in Which said valve is opened to its fullest extent.

i The effect of the construction and arrangement aforesaid isthat at the initial movement of said lever 24 to lift said valve 7 from its seat, the fulcrum point of contact of the lever cam surface 25 with the surface of the guard is at 37, but such fulcrum point of contact progressively shifts during the opening movement of said lever to the point 38 on said lever cam end 25, with the effect that the power from the hand of the operator who grasps said nozzle l in his palm with his fingers extending through the space 40 between the lever 24 and said guard 27 is initially more than double the leverage at the termination of the opening operation.

It is to be particularly noted that the pin 31" is not at any time utilized as a fulcrum for said lever 24, but merely serves to prevent longitudinal displacement of the cam shaped fulcrum end 25 of said lever with respect to the surface 26 of the frame 27 with which it cooperates, and that any other suitable means may be employed to maintain said 55 lever end in proper relation with its fulcrum support. For instance, said fulcrum end 25 of the lever may be slotted to engage a pin which is fixed in said lug 29, for preventing longitudinal movement of said lever while 1. In a liquid dispensing nozzle; the combination with a valve for controlling the passage of liquid through said nozzle; of a lever for opening'said valve; and means afi'oring a fulcrum for said lever, whereby the fulcrum is progressively. shifted to vary the effective leverage of said lever with respect to said valve throughout the opening movement of said valve by said lever; whereby the maximum leverage is afforded to initially displace the valve from its seat and diminishes as the valve is shifted away from its seat to the limit of its opening movement; wherein the lever is of thesecond order and its fulcrum,

end is curved to afford a cam surface and a frame of the nozzle affords a fulcrum support for said cam surface with respect to which the point of fulcrum contact of said lever is shifted by movement of the latter.

2. In a liquid dispensing nozzle; the combination with a valve for controlling the passage of liquid through said nozzle; of a stem on said valve mounted to reciprocate transversely to the axis of said nozzle through an opening in the latter; a guard frame on said nozzle in opposition to said stem; and a lever for operating said valve interposed between said stem and said frame, having at one end a cam surface adapted to bear on said frame as a fulcrum support; the point of fulcrum contact of said cam surface and said guard being progressively shifted during the movement of said lever to vary the effective lever-- age of said lever with respect to said stem whereby the maximum leverage is afl'orde to'initially displace the valve from its seat and diminishes as the valve is shifted away from its seat to the limit of its opening movement.

bination with a valve for controlling the pas-' sage of liquid through said nozzle; of a lever for opening said valve; and means affording aifulcrum for said lever, whereby the fulcrum is progressivelyshifted to vary the effective 3. In a liquid dispensing nozzle; thecomplace the valve from its seat and diminishes as the valve is shifted away from its seat to the limit of its opening movement; wherein the fulcrum end of the valve lever is bifurcated; and a lug rigidly connected with the nozzle extends between the bifurcations of said lever, and there is a pin and slot connection between said lever and lug.

4. In a liquid dispensing nozzle; the combination with a valve for controlling the passage of liquid through said nozzle; of a lever for opening said valve; a fulcrum for said lever, whereby the fulcrum is progressively shifted to vary the effective leverage of said lever with respect to said valve throughout the opening movement of said valve by said lever; whereby the maximum leverage is afforded to initially displace the valve from its seat and'diminishes as the valve is shifted away from its seat to the limit of its opening movement; wherein the fulcrum end of the lever is bifurcated; and a lug rigidly connected with the nozzle extends between the bifurcations of said lever, and is provided with a slot; and a pin fixed in said lever extends in said slot; whereby longitudinal movement of said lever is prevented while oscillatory movement thereof with progressive shifting of position of the fulcrum with respect to the axis of the valve is permitted.

In testimony whereof, I have hereunto signed my name at Conshohocken, Pennsylvania, this eighteenth day of January, 1932.

JOSEPH G. WOODFORD.

and means affording

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