US 3589413 A
Description (OCR text may contain errors)
United States Patent Filed Inventors Eugene W. Vtst Wappingers Falls. N.Y.:
Dean C McGahey, Fishkill, N.Y.; Richard H. Griswold, Houston, Tex.
June 19, 1969 Division of Ser. \0. 671.742. Sept. 29, 1967. Pat. No. 3.520.338.
June 29, 1971 Texaco Inc.
New York, NY.
Patented Assignee AUTOMATIC LIQUID DISPENSING NOZZLE 1 Claim, 7 Drawing Figs.
U.S. Cl 141/128, 7
141/206, 251/284 Int. CL "I B651) 3/24, B67d 5/28, 867d 5/372  Field of Search  References Cited UNITED STATES PATENTS 3,020,940 2/1962 Sutcliffe et a1 141/225 X Primary Examiner-Houston S. Bell, Jr, Attorneys-K. E. Kavanagh and Thomas H. Whaley ABSTRACT: An automatic liquid dispensing nonle wherein a lever, used to activate a control valve and regulate the rate of flow therethrough, is engaged by a holding means against the control valve, being released therefrom by automatic means upon the liquid being dispensed reaching a predetermined level, and subsequently being engaged by manual operation against a restraining member which permits the filling operation to be completed ata predetermined low rate of flow.
PATENTEU JUN29 Ian AUTOMATIC LIQUID DISPENSING NOZZLE This is a division ofSer. No. 671,742 filed Sept. 29,. 1967.
BACKGROUND OF THE INVENTION This invention relates generally to a method of and apparatus for dispensing a liquid into a receptacle and more specifically to one wherein the initial filling operation is accomplished by automatic means at a high rate of flow and the final filling operation is accomplished at a predetermined low flow rate, thereby allowing the receptacle to be substantially filled with little probability of overflow or spillage.
The usage of automatic dispensing nozzles at gasoline service stations has greatly decreased the time required to adequately service an automobile, since the station attendant is now free to perform other services while the gasoline tank is being filled. A variety of automatic dispensing nozzles are presently known and utilized in the art, with nozzles of this general variety being described in U.S. Pat. Nos. 2,528,747, 2,582,195 and 3,l96,908, the disclosures of which are incorporated herein by this reference thereto.
In the operation of nozzles of this type, after the automatic tank filling operation is completed, usually-a significant unfilled volume remains in the average automobile tank. Service station attendants, generally, then manually engage the lever against the nozzle control valve in order to discharge the amount of liquid necessary to fill the tank as completely as possible. This final operation is accomplished most effectively at a relatively low flow rate. It is difficult, however, for the attendant to manually position and retain the lever against the control valve in the optimum position and complete the operation without some overflow or spillage. To eliminate this problem, a novel device has been developed for restricting the movement of the lever, thereby enabling the tank filling operation to be completed at a predetermined low rate of flow, thereby reducing, if not eliminating for all practical purposes, the chances of wasteful and dangerous spillage of gasoline.
SUMMARY OF THE INVENTION The invention herein disclosed provides a holding means for engaging a lever against a nozzle control valve, thereby permitting the discharge of fluid into a receptacle, without the necessity for an attendant to operate the apparatus. When the liquid reaches a predetermined level in the receptacle and contact means provided in the nozzle, the lever is disengaged from the holding means and the control valve is rendered inoperative. Means are provided for completing the filling of the receptacle at a low rate of flow by engaging the lever against a restraining member which restricts the opening of the .nozzle control valve.
The principal advantage made possible by the use of this in vention over prior art methods is that the tank may be substantially filled without the familiar overflow or spillage. When the attendant attempts to complete the filling of the tank by means disclosed in the prior art, opening of the control valve too much causes the fluid to be discharged at a high flow rate and almost immediately results in backup and overflow. As a result, either the customer is inadequately serviced in that the tank is not completely filled and/or an unwanted amount of the fluid overflows. With the apparatus herein disclosed, a substantially full tank of gasoline is provided the consumer without any undesirable overflow and spillage during normal operation.
Accordingly, it is a primary object of this invention to provide a simple and reliable apparatus to dispense liquid into a receptacle which reduces the danger of spillage.
A further object of this invention is to provide a novel method wherein liquid is dispensed into the receptacle at a predetermined low flow rate during the completion of the receptacle filling operation.
These and other objects, advantages and features of the invention will become more apparent from the following drawing.
BRIEF DESCRIPTION OF THE DRAWING FIG. I is a side elevation, partly in cross section, of a liquid dispensing nozzle with the fixed restraining member for the operating lever;
FIG. 2 is a plan view of the nozzle with the fixed restraining member taken approximately along line 2-2 of FIG. 1;
FIG. 3 is an end elevation view of the nozzle with a fixed restraining member taken approximately along line 3-3 of FIG. I;
FIG. 4 is a fragmentary plan view showing the operating lever position during the automatic filling operation;
FIG. 5 is a fragmentary plan view showing the operating lever engaging the restraining member;
FIG. 6 is a fragmentary end elevation view taken in the direction of line 3-3 of FIG. 1 showing the lever engaging the restraining member;
FIG. 7 is an isometric view of the restraining member.
DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to the drawings, the liquid dispensing nozzle, indicated generally at 10, comprises a main nozzle body 11 having a liquid conduit 12 therethrough. At the rearward end of the nozzle 10, is a threaded inlet fitting 13, which provides a means for connection to a hose 14. The hose 14 is connected to a pump in communication with the source, e.g. an underground tank, of the liquid to be dispensed. The liquid passes through the liquid conduit 12 to the cavity indicated at 15-and then through the spout 16 at the forward end of the nozzle. A control valve 17 is interposed between the liquid conduit 12 and the cavity 15 in order to regulate the amount of liquid flow. The control valve 17, comprises a valve seat indicated at 18, with the opening and closing being regulated by the actuating rod 19. A spring 20, seated on valve member 21 and having its upward end bearing against a cap 22, provides the self-closing mechanism for the valve assembly. Cap 22 is provided to facilitate easy removal and repair of the control valve 17. The actuating rod 19 is engaged by an operating lever 23 and provides the means for controlling the rate of liquid flow through the nozzle. A sealing member 19a is spaced about actuating rod 19 to preclude any liquid leakage therethrough.
Accidental engagement of the actuating rod 19 by the operating lever 23 is prevented by means of a lever guard 24, which generally is an integral part of the main nozzle-body 11. The operating lever 23 is fulcrumed to a release plunger 25 which provides a means for releasing the operating lever 23 from the actuating rod 19 when the dispensed liquid reaches a predetermined level. During the filling operation, when the liquid contacts the opening 27 of a control fitting located near the discharge end of the spout 16, a diaphragm (herein not shown but disclosed .in US. Pat. No. 3,196,908 is actuated, which thereby releases the plunger 25 and returns the operating lever 23 to the off position. Nozzle 10 may be provided further with a buffer spring 28 which engages the tank opening in the automobile and prevents the nozzle from inadvertently being jarred loose from the tank. The foregoing description of the operation of an automatic dispensing nozzle is abbreviated and for a more detailed description thereof, reference is made to the aforementioned US. patents Referring to FIGS. 1 to 6 inclusive, wherein one embodiment of the invention is illustrated, a latch member 29 is mounted in the back opening of the lever guard 24. The latch member 29 is formed from a springlike material and provides a plurality of positions for engaging the operating lever 23, thereby holding the actuating rod 19 in the open position. As indicated in the drawing, latch member 29 provides three positions for engaging the lever 23, each of which allows a different flow rate. Upon the liquid reaching a predetermined level in the tank, release plunger 25 is actuated by a diaphragm, as previously described, lowering the forward end of the operating lever 23 sufficiently to cause the control valve 17 to return to the closed position and terminate the flow through the nozzle. This action also generally releases the operating lever with a force sufficient to disengage it from the latch member 29.
Restraining member 30 is attached fixedly to the back portion of the lever guard 24. As illustrated in H6. 7, the restraining member 30 comprises a U-shaped bracket with mounting holes therein, which permits fastening to a side leg of the lever guard 24.
For the automatic filling phase of the automobile tank, the lever 23 is engaged with the latch member 29 by the attendant with an upward force in any one of the numbered positions as indicated in FIGS. 1 and 3. The numbered position to be engaged is detennined by the attendant in considering the type of automobile to be filled and the desired rate of flow to be utilized. Position No. 1 opens the valve seat 18 the least, thereby permitting the lowest rate of flow, while the higher numbered positions open the valve seat 18 to a greater degree and thereby permit higher flow rates.
As illustrated in FIG. 2, the lever 23 is fulcrumed to the pivot pin 26 with a loose fit in order to permit a sufficient transverse motion of the lever such that it is capable of engaging either the latch member 29 or the restraining member 30. HO. 4, illustrates (by the arrow) the Operating lever 23 being moved with a transverse motion to engage the latch member 29. Once the tank has been substantially filled and the liquid dispensed into the tank contacts the opening 27 at the end of the nozzle 10, the automatic cutoff means terminates the liquid flow through the nozzle. The lever 23 is returned to the off position and the automatic filling phase of the tank is completed. The attendant then engages the lever 23 with an upward and transverse motion, as indicated by the arrow in FIG. 5, thereby contacting the lever 23 against the restraining member 30, as shown in FIGS. and 6. The restraining member 30 may be positioned so that it will engage the lever 23 at any predetermined flow rate. However, it is generally desirable to provide for a low flow rate during the completion of the tank filling operation, so that the vapors in the tank are displaced at a corresponding low rate. As described previously, upon the dispensed liquid contacting the opening 27, release plunger once again disengages the lever 23 from the actuating rod 19 and thereby closes the control valve 17. If it is found desirable by the attendant to further discharge liquid into the tank, the nozzle spout 16 may be withdrawn somewhat from the tank opening and additional liquid discharged into the tank by engaging the lever 23 by manual means against the restraining member 30. In the event that the attendant wishes to dispense the liquid into the tank by manual means alone, the lever 23 may be engaged against the actuating rod 19 to achieve the desired flow rate without contacting either the latch member 29 or the restraining member 30.
Thus there has been shown and described an improved method and apparatus for dispensing liquid into a receptacle whereby the receptacle is substantially filled with decreased probability of overflow or spillage.
Other modifications and variations of the invention as hereinbefore set forth may be made without departing from the spirit and scope thereof, and therefore only such limitations should be imposed as are indicated in the appended claims.
I. In the automatic shutoff liquid dispensing nozzle of the type having a main body with a liquid conduit therein and a self-closing valve for controlling the rate of liquid flow through said conduit, a hand operated lever movable about a fulcrum in a direction for opening said valve, means for holding said lever against said valve in open position during the automatic filling operation, automatic means for operatively releasing said lever from said valve to render the same inoperative, the improvement comprising l means for engaging said lever for limiting the movement t ereof to provide for partial opening of said valve for a low rate of liquid flow therethrough,
said last named means including a lever guard extending about and in the plane of said lever, said lever guard having an opening in one extremity through which a free end of said lever extends, said lever guard on either side of said opening providing side legs, said means for engaging said hand operated lever comprising a U-shaped member fixedly embracing said one of the side legs ofsaid lever guard, one leg of said U-shaped member extending into said opening in said lever guard and having a flat surface extending a substantial distance into said opening in the lever guard and providing a positive stop facing the free end of the lever in its said direction of movement for opening said valve, thereby to restrain said lever at said low flow position.