US2126848A - Liquid dispensing means - Google Patents

Description

Aug. 16, 1938.

A. WEISS LIQUID DISPENSING MEANS Filed July 8, 1936 BY 7 ATTORNEY Patented Aug. 16,

UNITED STATES PATENT OFFICE 2,128,848 mourn msransme. MEANS Abraham Weiss, New York, N. Y. Application July 8, 1936, Serial No. 89,553

11 Claims- (61. 226-127 This application is a continuation in part of my application Ser. No. 62,585-yfiled February 6. 4936.

The presentinvention relates to improvements in devices for dispensing liquids from a source into a receptacle, particularly adapted for use with liquid fuel supply nozzles employed with gasoline pumps or the like and having manually operable triggers for actuating cut-oil valves therein. v

The main object of my invention is to provide means whereby when the liquid reaches a certain level in the receptacle or tank to lie-filled, the discharge thereof into said receptacle will be automatically cut oil so that there will be no waste and fire hazards will be prevented.

Another object of my invention is to. so' construct the device that it will be simple and relatively inexpensive to manufacture.

vention consists in the combination, construction and arrangement of parts as will be hereinafter more fully described and defined in the appended" claims.

In the accompanying drawing; which forms part of this specification and in which similar reference characters denote corresponding parts:

Fig. 1 is a sectional side elevation of a nozzle equipped with my device;

Fig. 2 is a cross section on line 2-2 of Fig. 1;

Fig. 3 is a cross section on line 3-3 of Fig. 2;

Figs. 3a, 3b are longitudinal sections on line 3% of Fig. 1 at right angles to one another and,

Fig. 4 is a sectional side elevation similar to that of Fig. 1 of a modified construction of my device.

' Referring first to the modification shownin Figs. 1 to 3a, It denotes the usual nozzle which 40 is connected to the pipe or hbse leading from the source oi supply, such as gasoline pump or the like (not shown).' Extending alongside of said nozzle or through the same is a-tube I2 suitably fixed to or supported on said nozzle and the forward end of which is adapted to-be passed into the receptacle or tank (not shown) when.

liquid is to be dispensed into the letter. In this modification the tube I2 isformedat its forward end with a chamber I2 open at its bottom and.

With these and other objects in .view, my intank II, which through tube fitting I5 is con-- nected to a vacuum pump it.

The other branch I2 of said tube I2 leads into a suction chamber II which is suitably mounted at or near the rear end of the nozzle I0" by brackets or supports i8 and whose bottom is formed by a diaphragm I9. Mounted between the top of said chamber I1 and said diaphragm I9 is a spring 20 which normally holds said diaphragm in a neutral position. Centrally fixed to said diaphragm and. projecting downwardly therefrom isa rod or stem 2| which engages one arm 22"- of a double armed lever 22 fulcrumed at 23 in a bracket 24 fixed to the nozzle. The other arm 22 of said double armed lever engages the outwardly projecting end of a stem or rod 25 of a stop valve 25 provided within the nozzle I0 and which controls the flow of the liquid through said nozzle I0. Normally this valve 25 is held in open position by a spring 25. Arranged adjacent and in front of said valve 25 and within said nozzle I0 is a manually operated valve 21 whose stem 28 projects outwardly and downwardly and is operatively connected with the trigger 29 fulcrumed at 30 to the nozzle. Normally the valve 21 is held closed by the action of a spring 3i, so

that the now of liquid through the nozzle is shut Normally the ball 32 closes the passage between the two sections of the tube and keepsthe air vent l2 open. Said valve is adapted to be operated simultaneously with the valve 21 by the pulling of the trigger 29 upwardly. To this end the valve chamber or casing I2 has a cylindrical or tubular downwardly projectingextension 33 in which is movably mounted a plunger 34, under the tension of a spring 35 and whose stem 34 projects upwardly into said chamber and is adapted to engage saidzvalve to move it from one position into the other. A secondplunger 34 in said extension is operatively connected by a cross member 36 to the stem 28 or the valve 21.

The mode of operation is as follows: Upon the removal oi the nozzle from a hook on the pump (not shown) which hook as usual serves at the same time as an electric switch,

a both the liquid-pump and the vacuum pump it will in well known manner he set into operation. No liquid can as yet flow through the nozzle l because of the closure of the valve 21. The nozzle Ill and the forward end of the tube l2 are 5 then passed into the receptacle or tank to be filled with the liquid. Upon the pulling of the trigger 29 upwardly, the valve 21 is opened, permitting the liquid to flow into the receptacle or tank, and at the same time the passage between the two sections of the tube I2 is opened, and the ball put into the dotted line position in which it closes the vent I2 As long as the trigger is held in raised position the liquid continues to flow into the tank and air is drawn through the tube into the vacuum tank I. when the liquid reaches a certain level in the tank it enters the chamber l2, as a result of which the float iirises and closes the passage i2= therein, thereby shutting oil the flow of air from the tank through the tube l2, as a result whereof air will be drawn from the suction chamber ll through branches l2 and I2 into the vacuumtank I 4. As the chamber i1 is being evacuated the atmospheric pressure against the outer face of the 5 -diaphragm I9 will cause the latter to bulge inwardly thereby swinging .the double armed lever 22 on its fulcrum 23, as a result of which the' arm 22 will automatically close the valve 25 thereby shutting off the flow of the liquid through said nozzle l0. s

It will be noted that with this construction the user or attendant is free to release the trigger at any time while the liquid is being dispensed without any danger of an accidental over- 5' flow of the tank. In the modification shown in Fig. 4 the structure is somewhat similar to that shown in Fig. 2 of my earlier application Ser; No. 62,585. In this structure the chamber l2 and float i3 in the 40 forward end of the tube shown in the first modiflcation are omitted. In this modification the nozzle I0 is provided with the valve casing 21 in which is containedthe valve operated by the trigger 29. At the rear of said trigger operated valve is a second valve, here shown as a cook 31, adapted to be operated automatically when the liquid in the tank reaches a certain level. The tube l2 which like in the first modification may extend through or alongside the nozzle Ill 0 and whoseforward end is adapted to project somewhat below the mouth end of the nozzle is here not used'as an air conduit, but as a liquid conduit. Its rear end leads into a casing 28 having a suction chamber 39 which communicates with a liquid collecting chamber 40 in 'which is provided a float l l The bottom of said suction chamber is-formed by a diaphragm 42 or the like which is provided centrally with an outwardly projecting stem or rod 63 influenced by springs 1| and linked at 45 to a lever 48. This lever 48 at its free end carries a roller 41 which is adapted "to bear on a cam disk 48 fixed on a shaft 4. of an electric motor III which is actuated by an electric circuit (not shown-)- controlled from the hook switch heretofore mentioned. This motor drives a vacuum pump II, from which leads a pipe 52 terminating into a cylinder 53 mounted.

at or near, the rear end of the nozzle II or near the cock fl. Movably mounted in said cylinder 7 is a plunger 54, actuatedby a spring ii and whose rod ll is connected to a crank arm ll of the cock fl.

The passage leading from the pump ll into the pipe I2 is controlled by a-valve or cook II, which by an arm 81 and rod II is suitably connected to the armature i! of an electromagnet 8|. This electromagnet is adapted to be energized' from? an electric source (not shown) in the circuit of which indicated by wires 6!, 82 is enclosed an electric switch composed of the contact points 5 BI, 82' and a tail member 4| of conductive material projecting outwardly from the collecting chamber 40 and forming part of the float ll.

The operation of the device according to this modification is as follows: 10

Upon the insertion of the nozzle and tube into the tank and on the pulling of the trigger 28, the, liquid beginsto flow into the tank. Before the liquid reaches the desired level in'said tank some of the liquid will be sucked through the 15 tube i2 into the suction chamber 39 and thence ejected through the operation of the diaphragm 42 into the collecting chamber 40. When the float ll in said chamber 40 has risen sufficiently its tail piece ll contacts with the points il 62 20 closing the circuit through the electromagnet 80.

As aresult thereof the armature '59 will be attracted actuating the valve 51 to open communication between the cylinder 53 and vacuum pump ii. The plunger 54 will thereupon be 25 caused by the atmospheric pressure to move-inwardly against the tension of spring 55 and thereby closethe valve 31, to automatically shut oi! the flow of the liquid through the nozzle.

In thismodiflcation the automatic means, in- 30 cluding the collecting chamber 40, suction chamber 38, 89, electromagnet 60 etc. except the cylinder 53 and the parts actuating the valve 31 may be all mounted on a wall or board remote from the nozzle. 35

When the liquid in the chamber 40 is drained ofl sufficiently through a drain in the bottom of said chamber, the float ll returns to its ini-. tial position, breaking the electric circuit of the electromagnet 60, as a result of which the two 0 way cook 56 will be reset to close communication between the vacuum pump 5| and cylinder 53 and open communication between the latter and the atmosphere. The spring '55 will thereupon force the plunger il in the cylinder 53 outwardly 45 returning the cock 31 to its open position.

It is understood that various other modifications may be made in my device without depart: ing from the spirit of my invention. I, therefore, do not wish to restrict myself to the details 0 shown and described.

What I claim is: v

1. In a liquid dispensing means including a discharge nomle having a trigger operated valve.

means for automatically controlling the dis- 5;;

charge of the liquid from said nozzle into a receptacle, said means comprising a tube associated with and adjacent said nozzle to be passed together with the latterinto the receptacle, an auxiliary valve in said nozzle adapted to be norto mally open, pneumatically operated means for closing said auxiliary valve, a chamber and a float therein operated by the liquid in said receptacle and controlling the operation of said pneumatically operated means to close said 35' auxiliary valve when the liquid in said receptacle rises to a certain level.

2. In a liduid dispensing means according to claim 1, in which saidpenumaticaliy operated means include a suction chamber having a pres- "0 sure operated diaphragm and a'lever operativeiy connecting said diaphr m to said auxiliary valve.

8. In a liquid dispensing means according to claim 1, in which said pneumatically operated 75 means include a. vacuum tank and a suction chamber and in which said tube terminates both into said tank and chamber.

4. In a liquid dispensing means, a discharge nozzle having a trigger operated valve, an auxiliary valve in said nozzle adapted to be normally open, a tube adiacent said nozzle and adapted to be passed together with said nozzle into a receptacle 'to be filled, a liquid collecting chamber, means for drawing liquid into said chamber through said tube from said receptacle, a float in said collecting chamber, electric means including a switch controlled by said float, and pneumatic means controlled by said electric means for closing said. auxiliary valve when the liquid in said receptacle rises to a certain level.

5. In a device of the character described, a discharge nozzle, an air tube adjacent said nozzle having a. float adapted to act as a, normally open valve at its forward end and adapted to be passed together with said nozzle into a receptacle to be filled, stop valves in said nozzle and said tube, means for manually operating both said stop valves simultaneously to control the flow of liquid through said nozzle and the flow of air through said tube, pneumatic means for drawing air through said tube after the opening of said stop valves, an auxiliary stop valve in said nozzle and means controlled from said pneumatic means and operatively connected to said auxiliary valve, so as to cause said auxiliary valve to automatically close the instant said float valve has been closed when the liquid reaches the desired level in said receptacle.

6. In a device of the character described, a"

discharge nozzle, a manually operable stop valve and an auxiliary normally open stop valve in said nozzle, and means for causing the automatic closure of said auxiliary valve, when the liquid in the receptacle to be filled reaches a desired level, said means including a tube associated with said nozzle and whose forward end is adapted to be passed together with saidnozzle into said receptacle, driven means for drawing liquid.

through said tube from said .receptacle and means affected by the liquid passing through said tube and operatively connected to said auxiliary stop valve. I

'7. In a device according to claim 6, in which said liquid affected means include a pneumatically controlled means for closing said auxiliary valve.

8. In a device according to claim 6, in which said liquid afiected means include an electric circuit, a switch controlling said circuit and operated automatically by the liquid drawn through said tube, and pneumatically operated means controlled from said circuit and operatively connected to said auxiliary valve.

9. In a device according to claim 6, in which said liquid affected means include suction means,

electric means controlling the operation of said suction means and controlled from the liquid passing through said tube, and means controlled through, a float remote from the discharge end of said conduit, suction means adapted to withdraw liquid from the receptacle and conduct it to said float to elevate the same upon the rising of the liquid level in the receptacle to a predetermined-heightand means actuated by the said elevation of the float to close the said valve.

11'. In an automatic valve, the combination of a conduit for conducting liquid to a receptacle, a valve for stopping the flow of liquid therethrough, electromagnetic means for closing the valve, a float chamber remote from the discharge end of said conduit, a float in said chamber, a tube communicating with the float chamber and having an intake orifice adapted for insertion within the receptacle, means for forcing liquid from the receptacle through the tube and into-the float chamber to elevate the float upon the liquid level in the receptacle rising to cover said intake orifice and means actuated by the said elevation of the float to energize said electromagnetic means whereby to close the said valve.

' i ABRAHAM wEIss.

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