US1964974A - Dispensing apparatus - Google Patents

Description

July 3, 1934. R. w. B OND ET AL DISPENSING APPARATUS Filed Aug. 2?, 192 8 3 Sheets-Sheet l July 3, 1934. R w ND ET AL 1,964,974

DISPENSING APPARATUS Filed Aug. 27, 1928 3 Sheets-Sheet 2 y 1934- R. w. BOND ET AL DISPENSING APPARATUS SSheets-Sheet 3 Patented July 3, 1934 UNITED STATES PATIENT; OFFICE DISPENSING APPARATUS Raymond W. Bond and Paul B. Bentrew, Fort Wayne, Ind., assignors to S. F. Bowser & Company, 'Inc., Fort Wayne, Ind., a corporation. of

Indiana Application August 27,

of dispensing various kinds of liquids at various locations.

One of the objects of ourinvention is the provision of improved and eflicient valve mechanism operable at a dispensing unit for controlling air pressure operated mechanism for effecting flow of the liquid to the dispensing unit.

Another object of the invention is the provision of a single device for operating the controlling valve of the dispensing unit and also the valve mechanism for effecting the operation of air pressure operated mechanism for efiecting flow to the dispensing unit.

A further objectof the invention is the provision of a controlling valve for the dispensin unit and controlling valve mechanism for an air pressure operated system with connections between the same to control the air pressure at the will of the operator in effecting the operation of the dispensing unit or the discontinuance of such operation.

Another object of the invention is the provision of a plurality of dispensing units connected to the same air pressure operated system with means in each unit for efiecting the operation of said air pressure operated system when dispensing of the liquid is desired.

Another object of the invention is the provision,

of improved and efiicient means for controlling and limiting the pressure in an air pressure operated dispensing system.

A further object of the invention is the provision of an air pressure operated dispensing system including a pressure tank with means for controlling the air pressure in the pressure tank and the flow of liquid to and from said tank.

Another object of the inventionis the provision of improved and eiiicient means for controlling air pressure supply for the purpose of cleaning out a pressure tank in an air pressure operated dispensing system.

Other objects of the invention will appear hereinafter, the novel features and combinations being 'set forth in the appended claims.

In the accompanying drawings- Fig. 1 is a view showing a plurality of dispensing units in a complete system of dispensing apparatus;

Fig. 2 is an enlarged sectional elevation of the automatic check-valve between the storage tank and the pressure tank;

1928, Serial No. 302.387

Fig. 3 is an enlarged elevational view showing the controlling valve for the dispensing unit, the controlling valve mechanism for the air pressure operated system, and the interlocking connections, with the hose nozzle inserted into the housing in position to operate such interlocking connections to prevent the operation of the dispensing unit;

Fig. 4- is an elevational view similar to Fig. 3, but showing the hose nozzle withdrawn and the parts in position for efiecting dispensing operation, the valve mechanism for controlling the air pressure operated system being shown in sectional elevation;

Fig. 5 is an elevational view, with parts broken away and shown in sectional elevation, of the air release and shut-oil device;

Fig. 6 is an enlarged sectional elevation of the line valve in the suction pipe extending to the lower portion of the pressure tank;

Fig. 7 is a sectional elevation of the air pressure reducing valve between the source of air pressure supply and the dispensing system shown in Fig. 1; and

Fig. 8 is a sectional elevation of the safety relief valve one of which is located in each of the dispensing units shown in Fig. 1.

Referring to Fig. 1 of the drawings, 9 designates the storage tank which is adapted to be buried in the ground and filled with gasoline through the fill-pipe 10. Within the storage tank 9 is located a pressure tank 11. Connected to the lower portion of the pressure tank 11 is a check-valve 12 shown in enlarged sectional elevation in Fig. 2. When there is no air pressure in the tank 11 the gasoline in the storage tank is free to flow by gravity through the opening 13 past the checkvalve 14 into the pressure tank.

The valve casing 15 may remain connected by the screw threads 16 to the pipe 17, but the checkvalve element 14 is mounted on a separate casting 18 which may be held on the seats 19 and 20 by the screw-threaded connection at 21. A rod 22 is connected to the top of the casting 18 and extends upwardly through an opening in the storage tank to a protecting cap 23. By removing the 'cap 23 and turning the rod 22, the casting 18 together with the valve element 14 may be removed from the valve casing 15. The gaskets at 19 and 20 are secured to the casting 18 and upon removal of the latter these gaskets may be examinedand renewed, if desired. The checkvalve element 14 and its seat may also be cleaned and re-grinding may be efiected, if desired. When the valve is replaced the rod 22 may be left tion in the chamber 24in the casing 15'throughout the entire circumference of movement of the casting 18 since all that is desired is the flow from the storage tank past'the check-valve 14 into the chamber 24 and thence through the port 16 in the pipe 1'! into the pressure tank 11. The checkvalve element 14, however, prevents backflow of the liquid from the pressure tank to the storage tank when air pressure is introduced in the pressure tank. Itiswhen theairpressureinthe pressure tank is relieved that the gasoline flows by gravity through the valve 12 into the pressure tank 11.

Thetopofthestoragetankil isventedtothe atmosphere through the pipe 25 which extends to a'point above the wall 26 to a position under the vent protector27. Therefore the gasoline is free to flow into and out of the storage tank. 9.

Air pressure is introduced into the pressure tank 11 through the pipe 28 which extends upwardly to the valve mechanism 29 of the dispensing imit 30. In the dispensing unit 31 is a valve mechanism32similartothatdesignated29inFig. 1. The valve m 29 and 32 are connected in multiple by means of the pipes 33 and 34 to a pipe 35 which is connected to the pipe 36 and thence to the supply pipe 37 which leads to the source of air pressure supply which may be an airreceiving tank (not shown). The air valve mechanisms 29 and 32 are connected by means of the pipe 38 in series between the pipe 28 and the vent pipe 25, the connection to the vent pipe 25 from the valve mechanism 32 being by means of the pipe 39.

.The valve mechanisms 29 and 32 are operated respectively by the operating levers '40 and 41 which in their inoperative positions rest against thestops 42 and 43. 'We have shown the details of the valve operatingminFlgs.3and4. Thismechanism being the same ior both the valves 29 and 32 the description of one will answer for both. The operating lever 40 ispivoted at 44 to a bracket 45 secured to the housing 46-ofthe dispensing unit 30. The rear end of the operating lever 40 is pivoted at 47 to a link 48, the lower end of which is pivoted at 49 to the upper end of a pushrod 50. This push-rod operates vertically in slide bearings inthe bracket 51 which is see to the back of the housing 46.

The lower end of the push-rod 50 is adapted to engage one end of a lever 52 which is pivoted at 53. The lever 52 when tilted by the downward movement of the push-rod 50 will elevate the valve stem 54 as shown in Fig. 4and thereby operate the valve shown in sectional elevation in Fig. 4. When the operating lever 40 is moved to the horizontal position shown in Fig. 3thespring 159inthevalve housingwillact on the collar 160 which is secured to the valve stem 54 and restore the lever 52 to its horizontal position and therefore again raise the push-rod to its initial position.

When the valve stem-54 is in its lowermost position the valve 57 will'be closed, thereby closing the my 58 from communication between the chambers 59 and 60; When the valve 57 is elevated, however, as shown in Fig. 4, communication will be established and the chamber 59 and througbthe passageway 68 into the chamber 60 and-the pip 28. Now by merrlngtol'lg. 1 itwillbeseenthatwhen comthrough the pipe 33' munication is established between the pipe 33 and thepipe 28 the source of air pressure supply will be connected from the pipes 37,36 and 35 through the pipes 33 and 28 to the pressure tank 11. Therefore upon moving the operating lever 40 to its elevated position shown in Fig. 4 the valve mechanism 29 will be operated so that air pressure will be directed into the pressure tank 11.

Extending to the lower portion of the pressure tank 11 is a pipe 61 which is connected through the line valve 62 to the pipe 63. The details of the line valve 62 are shown in Fig. 6. The pipe 63 is connected to the port 64 and the pipe 61 is connected to the chamber 65. When air pressure is produced in the tank 11 the gasoline from the lower portion thereof may flow upwardly along the pipe 61 into the chamber 65 and thence through the open spider 66 which is screwthreaded to an opening in the body of the valve 62 and is provided with 'a central bearing 67 for 95 the-stem 68 of thevalve 69. At the top of the valve body is a screw-threaded plug 70 which when removed enables the removal of the valve seat 71 and the valve 69 for the-purpose of cleaning and It willbe seen that the'line checkvalve 62 which is located above and outside of the storage tank 9 prevents backflow of the gasoline from the pipe 63 into the pipe 61.

The pipe 63 is extended upwardly to an air release 72 which is located at an elevation substantially above the sight discharges 73 and 74 of the dispensing units 30 and 31. The air release 72 is shown in detail in Fig. 5.- The pipe 63 is connected to the port 63' at the lower portion of the owing 75 of the air release '72. Within the casing 75 is a float 76' which is connected to two poppet-valves '77 and 78 which are for the purpose or shutting off the flow of gasoline from the interior of the casing 75 to the port 79 until all of the air has been released from the pipe 63 and 115 'the interior of the casing 75. The top of the casing 15 is connected at 80 to a pipe 81 which slants downwardly as shown in Fig. 1 and is connected to the vent pipe 25. a The port 79 at the bottom of the casing '75 is connected tothepipe 82.

Branching upwardly from the pipe 82 are the vertical pipes 83 and 84 which are respectively provided with hand-operated valves 85 and 86. The pipes 83 and 84 are connected to the casings 8'7 and 88 which are adapted to contain screens for filtering the gasoline before it flows into the pipes 89 and 90. At the upper ends of the pipes 89 and 90 are valves 91 and 92 which are controlled by the levers 40 and 41. The upperends of the valves 91 and 92 are connected to the meters 93 and 94. From these meters the gasoline flows through the vertical pipes 95 and 96 to the sight discharges 73 and 74 and thence through the hoses 97 and 98 to the discharge nozzles, one of which isshownat99in Fig. 1. r 13 By referring to Fig. 3, it will be seen that the lower end of the link 48 has a pin and slot connection at 100 with the lower end of the link 101. The upper end of this link is pivoted at 102 to the crank arm 103 which is pivoted at 104 to the body of the valve 91. Pivoted at 105 to the crank arm 103 is a push-rod 106 which projects into a central recess in the valve element 91' to open the valve of the valve 91'. The gasolinemay then flow to the pipe 38 which is connected to the valve pressure tank 11 through the pipes 61 and 63 and thence through the air release 72 into the pipes 82 and 83 and finally to the nozzle 99. The nozzle is provided with a handle 109 which when grasped enables the operator to use his fingers to move the lever 110 on a pivot 111 to cause the short arm 112 to actuate the valve stem 113 and thus open the valve at 114 to eflect flow of gasoline from the'hos'e 97 to the nozzle 99. While we have shown the wet hose system in thatthe hose 97 is always kept filled with gasoline, our improvements are also adapted to the dry hose system in which event the lever 110 and the valve operated thereby are omitted and a hand-operated valve is installed at 115 in the dispensing unit at the left-hand portion of Fig. 1 and at 116 at the right-hand portion of Fig. 1.

The hose nozzle 99 is adapted to be inserted through an opening in the housing 46 and locked in the housing by means of the locking mechanism 117 shown in Fig. 3 while the connections between the nozzle and the hose 97 rest on the 'scuflE plate 118 attached to the' back of the housing 46 at the bottom of the opening through which the nozzle is inserted.

Back of the opening in the housing is a vertical fiat plate 119 which is pivoted at 120 and carries at its upper end the stop quadrant 121. When-the operating lever 40 is in the position shown in Fig. 4 the nozzle cannot be inserted into the housing, because the stop quadrant 121 prevents the plate 119 from being moved back away from the scuff plate 118. This is for the reason that the stop quadrant 121 will strike against the drum 122 at the lower ends of the links 48 and 101 when the operating lever 40 is in its upper position. When this operating lever is moved to its horizontal position as shown in Fig. 3, the drum 122 will be sufiiciently elevated to permit movement of the stop quadrant 121 under the same. Then the nozzle 99 together with the parts connected thereto may be inserted through'the opening in the housing to swing'the plate 119 and the quadrant 121 to the position shown in Fig. 3. So long as the nozzle is inserted in the housing the quadrant 121 will act as an abutment or stop-to prevent upward movement of the operating lever 40. Not until the nozzle is removed from the housing can the lever 40 be moved to its upper position so as to open the valve 91 and operate the valve mechanism' 29.

In order to insure re-fllling of the pressure tank 11 after each dispensing operation of either dispensing unit, both operating levers 40 and 41 should be moved back to their horizontal positions. Whenever the valve stem 54 is moved to its upper position as shown in Fig. 4, the valve 123 will be closed so as to shut ofi communication between the pipes 32 and 28 and the exhaust pipe 38. In other words, by the closure of the valve 123 the air pressure line is prevented from being connected to the exhaust. When the operating lever 40 is moved to its horizontal position, however, the valve stem 54 will be moved back to its initial position and the valve 57 will be closed and the exhaust valve 123 will be open. The pipe 28 leading from the top of the pressure tank will then be connected-through the passageway 124 mechanism 32 as shown in Fig. 1. Since the valve mechanisms 29 and 32 are connected in series by the pipe 38 it will be necessary .for the operating levers of all of the dispensing unitsto be moved back to their horizontal or inoperative positions before the pressure tank can be connected to the vent pipe 25. Thereafter after each dispensing operation the operating levers should be moved' back to their initial positions so that the pressure tank 11 will be connected through the valve mechanisms of the dispensing units in series to the atmosphere. Such relief of the pressure in the pressure tank 11 enables the operation of the valve 12 shown in Figs. 1 and 2 so that gasoline will flow from the storage tank to the pressure tank to replenish the gasoline in the latter. Y

If it should happen that the storage tank becomes exhausted and air is trapped in the pipes Gland 63 when the storage tank is re-fllled and dispensing operations are resumed, the air releasebegins to flow into the casing 75 and reaches the float 76 the latter will be lifted to first open the poppet valve 77 and allow gasoline to flow through the port in the center of the valve 78 so as to equalize the pressure on both sides of the latter. Subsequently the larger valve 78 will be lifted to permit flow ofthe gasoline through the port 79 into the pipe 82. Stops 125 on the inner wall of the casing 75 may be relied on to keep the float 76 from closing the vent 80. So long as the flow of gasoline takes place in the normal operation of the dispensing system the float 76 will hold the valve 78 open but as soon as air is entrappedin the pipe 63 so as to cause the 11 gasoline to flow from the casing 75 through the port 80 into the pipe 81 to take the place of the air being exhausted the float 76 will drop and cause the valve 78 to shut ofi communication with the pipe 82 before any air can reach the latter.

If there should be a temporary flow of gasoline entirely filling the chamber of the air release and overflow the same the stops 125 will keep the float 76 from closing the vent 80 and the downwardly slanting pipe 81 will direct the overi flowing gasoline into the'vertica'l pipe and back into the top of the storage tank 9.-

Between the air pressure supply pipe 37and the pipe 36 are located the globe valve 126,, the air pressure reducing valve 127 and the pressure gauge 128. The globe valve 126 is for the purpose of shutting 011 the supply of air pressure when necessary. The air pressure reducing valve 127 is shown in detail in sectional elevation in Fig. 7. This air pressure reducing valve may be set for approximately ten pounds per square inch of air pressure in the pipes connected to the dispensing units. A spring 129 the tension of V against the action of the spring 137. The'com-.

pressed air may enter the port 139 and through the wire screen 140 enter the chamber 133 until sufficient pressure is built up in the air pressure connections to the dispensing units to cause the diaphragm 132 to move upwardly asshown in Fig. 7, whereuponthe valve 136will be closed.

Each dispensing unit is preferably provided with a relief valve as shown at 141 and 142 in Fig. 1. Fig. 8 shows in sectional elevation the detailed construction of each of these relief valves. They are connected in lateral branches from'the vertical pipes 33 and 34 which extend upwardly from the supply pressure pipe 35. When the pressure in the pipe and consequently in the, pipes 33 and 34 exceeds say fifteen pounds per square inch, the relief valves will automatically open to the atmosphere and act as safety valves to relieve the pressure in the system. In Fig. 8, the adjusting mechanism comprising the cap 143 is connected to the body 144 of the valve and the safety valve element 145 acts against the spring 146 to permit communication between the chamber 147 andthe atmosphere through the port 148. By means of the adjusting screw 149 the tension of the spring 146 may be adjusted and therefore the seating of the valve may be varied. The pressure in the system may also be relieved manually at each'dispensing unit by means of the lever 150 which is pivoted at 151 so that its short arm 152 may act on the pin 153 to engage the valve 145 to unseat 'the same against the action of the spring 146 and therefore connect the pipe 33 through the chamber 147 to the outlet port orexhaust 148.

It is preferable to locate the pressure reducing valve 127 in a heated building to prevent freezing in the cold weather. At the lowest point in the air pressure connections to the dispensing units is located a water trap 154 from which the water may be drained occuionally by opening the pet cock 155 shown in Fig. 1. Such water trap should also be located where it will not freeze during the cold weather. r

In order to clean the air pressure tank 11, the plug 156 may be removed from the return'elbow 157 at the top of the pipe 158 which leads down through-the storage tank 9 and thence to a D0317 tion with its lower end near the bottom of the pressure tank 11. The plug 156 ordinarily closes communication between the pipe 158 andthe atmosphere. When the plug 156 is removed, however, and air pressure is introduced into the tank 11 any sediment at the bottom of this tank may be forced through the clean-out pipe 158 and the return bend 157. Before removing the plug 156 it is preferable to close the valve 126, then move one of the operating levers or 41 upwardly to establish a connection between the pipe 35 and the pipe 38. Then the valve 126 should be opened slowly so as to effect pressure in the pressure tank 11 and force the sediment out through the clean-out pipe 158. It should be noted that the return bend 157 is at a relative- 'ly much lower elevation than the top of the pipe 63 andthe sight discharges 73 and 74. Therefore, the head of the column of liquid in the pipe 158 being less than in the other columns in the pipes 63, 95 and 96, the desired cleaning of'the {sediment'from the bottom of the tank 11 will take place without interference.

From the foregoing it will be seen that either dispensing unit may be operated by moving up its operating lever or both dispensing units may be operated simultaneously. If the operating lever 41 is up and the operating lever 40 down the flow of air under pressure will be fromipipe 35 to pipe 34 through valve 57 and thence through the passage 124 to pipe 38 to valvelmechaniszn restricted to the 29 ofdispensingunitwthroughtheopenvalve 123 thereof to the pipe 28 and the pressure tank 11.. If both operating levers 46 and 41 are up the pipe 35 will be connected through valve 57 the valve 57 only to the pipe 28 and the pressure tank 11, but since both gasoline valves are now open the pressure on the tank will-force the liquid through both lines 83 and 84. when both operating levers are down as shown in Fig. 1, the nozzles may be hungon the levers 40 and 41 by means of their hooks, one of which is shown at 161 in Fig. 1, or'the nomles may be inserted through the holes 162 and 163 of the operating levers 40 and 41, respectively, and thus hung up.

The-parts to the right of the wall 26 should be inside of a building while the parts to the left of the wall 26 may be outside exposed to the elements of the weather.

It should also be noted that the valve 123 is freely slidable on the valve stem 54 as shown in Fig. 4 and is connected by the spring to the collar 56;. which latter is secured to the stem 54. This insures closure of the exhaust valve 123 before the valve 57 is opened when the valve stem 54 is moved upwardly.- Furthermore, should the pressure in the chamber exceed a predetermined limit, say fifteen pounds per square inch, the spring 55 will permit the valve 123 to open to exhaust and act as a relief valve.

- No claim is made herein to that portion of the disclosure relating to the air release device in Fig. 5 of the drawings and operable in combination with the system shown in Fig. 1, since the subject matter thereof is not my invention, but is disclosed and claimed in a separate application'assigned to the common assignee of the present application.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claims hereto appended and we wish therefore not to be precise construction hereindisclosed.

Having thus fully disclosed an embodiment of our invention, what we desire to'secure by Letters Patent of the United States is: V

1. In dispensing apparatus, the combination with dispensing mechanism terminating in a dispensing nozzle, of a valve for controlling the flow to said dispensing mechanism, a storage tank, fluid pressure means and connections for withdrawing liquidfrom said storage tank and directing it to said dispensing mechanism, valve mechanism for controlling said fluid pressure, an operating lever, and means connected between said operating lever and said valve and said valve mechanism to open said valve and operatesaid valve mechanism to effect the flow of liquid to said dispensing mechanism when the operating lever is pushed up to substantially vertical positionandtoclose saidvalveandoperate saidvalve mechanismto effect the discontinuance of such flow when the operating lever is pulled down to substantially horizontal position, said lever being constructed and arranged to support the dispensing nozzle when in such substantially horizontalpomtion.

2. In a system for dispensing liqui&, the combination with a plurality of dispensing units,- each comprising a liquid flow line through which liquidto'bedispensedisadaptedtobeforcedby the airpressure, said liquid ilow-line including a meter and a flexible'hose.terminating in a valve-controlled nozzle, of anair pressure operated system for supplying liquid to said units,

.and valve mechanism on each unit connected in series to the next adjacent unit for controlling said air pressure operated system, each flowline of each unit having means disposed therein in advance of the meter and for preventing the passage of air under pressure through said meter.

3; In a system for dispensing liquids, the combination with a plurality of dispensing units, of a storage tank, a pressure tank, connections between a source of airpressure supply and said pressure tank, valve mechanisms in said connections one for each oi said dispensing units for controlling the liquid flow to said dispensing units, supply pipe connections between said pressure tank and said dispensing units, means for supplying liquid to said pressure tank from said storage tank, operating devices one for each of said valve mechanisms for operating the latter, and connections from said pressure tank in series through said valve mechanisms to the atmosphere to relieve the pressure in said pressure tank and permit flow of liquid thereinto irom the storage tank when the said operating devices are all in such positions that dispensing is out ofi.

d. In a dispensing system, the combination with a plurality of dispensing units, of a storage tank, a pressure tank, means for supplying liquid from said storage tank to said pressure tank,

a plurality of valve devices one for each or" said dispensing units, connections for supplying air pressure through said valve devices to said pressure tank, manually operated means one for each or" said units for operating said valve devices to connect the same in multiple between the source of air pressure and said pressure tank, and to connect said valve devices in series between said a pressure tank and the atmosphere.

5. In a dispensing system, the combination with a plurality of dispensing units, of a storage tank, a pressure tank, means for supplying liquid from said storage tank to said pressure tank when the pressure in the latter is relieved, a plu- 6. in a device of the class described, the combination of a supply tank adapted to hold a quantity of liquid, a pressure tank having a gravity feed connection to said supply tank, means providing a source of compressed air, a first dispensing apparatus and a second dispensing apparatus, a valve mechanism for each of said dispensing apparatuses, each valve mechanism having a con.-

nection to the source of compressed air, and one of said valve mechanisms having a connection,

to the top of the pressure tank, and the other valve mechanism having a pressure relief, and said first-mentioned valve mechanism having a connection with said second valve mechanism whereby air pressure from said pressure tank is passed through said first valve mechanism and thence through its connection to the second valve mechanism, and thence to the air relief of said second valve mechanism, means whereby each of said valve mechanisms may be operated independently of the other, and means forming a connection from the pressure tank to each dispensing apparatus for dispensing liquid from the pressure tank through the apparatus, and valve means, for controlling each of said last-mentioned dispensing means.

7,;In a device of the class described, the combination of a supply tank and a pressure tank connected thereto, means forming a source of compressed air, a first dispensing apparatus and a second dispensing apparatus, a valve mechanism for the first dispensing-apparatus and a valve mechanism for the second dispensing apparatus, said valve mechanisms having connections whereby the air pressure from the source will pass through valve-controlled ports in the second valve mechanism to valve controlled ports in the first valve mechanism, and will thence pass to the pressure tank; and means for operating the valves of each or said valve mechanisms.

3. In a device of the class described, the combination of a supply tank and a pressure tank connected thereto, means forming a source of compressed air, a first dispensing apparatus and a second dispensing apparatus, a valve mechanism for the first dispensing apparatus and a valve mechanism for the second dispensing apparatus,

said valve mechanisms having connections the air relieved from the pressure tank will pass first through valve-controlled ports of the one valve mechanism and thence to valve-controlled ports or the other valve mechanism, and thence to atmosphere.

91111 a device or the class described, the combination of a supply tank adapted to hold a quan-' tity of liquid to be dispensed, a pressure tank connected thereto and having a connection therewith, means iorming a source of air pressure, a

first dispensing apparatus and a second dispensing apparatus, a liquid dispensing feed" line from the pressure tank to each dispensing apparatus,

there being a valve in each line, and valve mechanisms for each dispensing apparatus one of said valve'znechanisms comprising a casing having two internal valve seats and forming three spaced-apart internal chambers, one or said chambers having connection to the source of compressed air, another 01' said chambers having a connection to the pressure tank, there being a valve for each valve seat, and means for shifting said valves for connecting the first-mentioned chamber and the second-mentioned chamber, and for closing communication between the second mentioned chamber and the third-mentioned chamber, and another of said valve mechanisms including a casing and two internal valve seats 'forming three separate chambers, one oi said chambers communicating with the source of compressed air, the second mentioned chamber communicating with the third-mentioned chamber of the first-mentioned valve mechanism and a third chamber having communication with the atmosphere, and valves for controlling communication between the three chambers of the second valve mechanism and means for operating said valves whereby to connect the first and second mentioned chambers while closing communi- 7 lso 10. Inadeviceoitheclassdescribedthe combination d a supply tank adapted tohold a quantity of liquid to be dispensed, a pressure tank connected ihereto'and having a gravity teed connection therewith, means forming a source or air pressure, a first dispensing apparatus and a secand dispensing apparatus, a liquid dispensing i'eedlinetromthepressuretankioeachdispensing apparatus, there being a valve in each line, and a valve mechanism for each dispensing apparatus, each valve comprising a casing having two spaced-apart internal valve seats forming three separate chambers, a valve rodpassing axially through said casing and through said valve seats and having valves thereon adapted to open and close said seats. whereby in one position to interconnect a pair of said chambers and whereby in another position to interconnect mother pair of said chambers, there being a connection from one chamber of each of said valves to the source of compressed air, there being a connection from the chamber of one of said valves to the pressure tank and from the chamber of another of said valves to an air relief, and the third chamber of each of said valves being interconnected whereby air pressure in passing to the pressure tank will pass in series through certain chambers of both valves, and whereby air pressure in being relieved from the pressure tank will pass though certain chambers of both of said valves, there being means for operating the valves of each of said valve mechanisms.

11. In a device of the class described, the combination of a supplytank adapted to contain a supply of liquid to be dispensed, said tank having a pressure tank mounted wholly within said supply tank, means forming a conduit between said tanks whereby liquid will normally flow by gravity from the supply tank into the pressure tank, a valve mechanism associated with said conduit and mounted within one of said tanks and having a detachableportion, a relatively long device having one end extending outwardly of and adiacent an opening in the second supply tank and having its other end rigidly connected to the detachable portion oi the valve mechanism, whereby said detachable portion may be removed bodily through said opening for inspection and repair, and a' closure for the opening of the upply tank.

12. In a liquid dispensing apparatus, the combination 01' an air pressure tank adapted to contain a imply of liquidto be'dispensed, a dispensing apparatus having a discharge nozzle and having a connection to the pressure tank for the pamge oi liquid to be dispensed, of means forming a source or air pressure, a connection fromsaidmeanstothetopotthepressuretank and a cleanout pipe extending into said pressure tank near the bottom thereof, for permitting the sediment to be towed thereout by air pressure exerted within the tank. i

13. In combination with a dispensing apparatus adapted to bepositioned above ground, of a pressure tank adapted to be buried beneath the ground level, of means forming a source of air pressure, means forming a liquid feed line from the pressure tank to the dispensing apparatus, an air pipe connected to the source. of air pressure anddischarginginto the pressuretank, and a pressure operated cleanout device connected tothepressure tank and adapted-to discharge above the ground.

14. In combination with a dispensingapparatus adapted to be positioned above ground, of

said threaded portion, and

a pressure tank adapted to be buried beneath the ground level, of means forming a source of air pressure, means forming a liquid feed line from the pressure tank to. the dispensing apparatus, an air pipe connected to the source of air pressure and discharging into the pressure tank, and a cleanout pipe having its open mouth positioned within the pressure tank and extending upwardly above the ground and terminating in a discharge nomle, said discharge nozzle being directed toward the ground and provided with a closure.

15. In a liquid dispensing apparatus, the combination of a dispensing. device positioned above the ground and including a feed line having a sight glass carriedtherein, of a pressure tank. buried below the ground and adapted to carry a quantity of liquid to be dispensed, a connection from said pressure tankto the hose line of the dispensing apparatus, a source of air pressure,

means connecting the same to the pressure tank for forcing liquid from the pressure tank to the dispensing apparatus, and a sediment cleanout for the pressure tank, comprising a pipe for its mouth disposed within the pressure tank and extending above ground to an elevation below the upper portion of the feed line from the pressure tank to the dispensing apparatus, and below the sight glass of the dispensing apparatus.

16. In a liquid dispensing apparatus having a pressure tank containing liquid to be dispensed and having a connection to a source of airpressure, a liquid feed line from the pressure tank to the dispensing'apparatus, valve mechanism for controlling the air pressure to the pressure tank comprising a valve casing having two internal valve seats providing three separate chambers, a connection from one or said chambers to the source of air pressure, a connection from another of said chambers to the pressure tank, and a connectionfrom the third chamber to an air pressure release, a valve foreach seat, and means for operating said valves whereby to open the connection between the first chamber and the second, and to close the connection therefrom to the third, and sequentially to open the connection from a second chamber to the third and close the connection from the first chamber to the second, including means for closing the valve between the second and the third chamber before the valve between the st and second chamber is opened.

17. In a device oi the class described, the combination of a liquid containing tank adapted to be disposed below ground level, valve mechanism mounted wholly within said tank, said tank having an opening relatively smaller than said valve mechanism, said valve mechanism having a detachable portion, and a device rigidly connected to said detachable portion and arranged normally to project through said opening for disconnecting and removing said detachable portion from said valve mechanism, and a closure for said tank opening.

18. In a device 01' the class described, the combination of a liquid containing tank adapted to be disposed below ground level, valve mechanism mounted wholly within said tank, said tank having 'an opening relativelyrsmaller than said valve mechanism, said valve mechanism including a seat and a threaded portion, said valve mechanism having a detachable portion provided with a part adapted to rest on said seat and provided' with a thread which is adapted to engage tension rigidly connected to said detachable portion, and extending through the opening in said casing and adapted to be turned for unthreading and detaching the detachable portion from said valve, and for passing the same through said tankopening, and a closure for said opening.

19. A device of the class described, the combination or" a storage tank adapted to hold a quantity of liquid and adapted to be disposed below ground level, a pressure tank adapted to be disposed within and at the bottom of said storage tank, a valve casing mounted wholly within said storage tank and permanently connected to said pressure tank, said valve casing providing an interior liquid conduit and providing a seat and an oppositely threaded aperture, a detachable memher having opposed walls providing a liquid conduit and a seat adapted to rest on the seat of the valve casing, a one-way valve carried by said second or detachable member for controlling the entrance of liquid from the storage tank into said pressure tank, said detachable member having a lateral extension having a threadadapted to engage a threaded opening of the valve casing, said extension having a relatively long and narrow portion adapted to project through an opening in the tank which opening is smaller than the valve casing but is of sufficient size to permit the passage therethrough of said detachable member.

20. In a device of the class described, the combination of a storage tank and a pressure tank, said pressure tank being mounted wholly within the storage tank, a valve-casing permanently connesting with the pressure tank and mounted within the storage tank, said valve casing having a liquid inlet, and a detachable valve carrying memer rotatably mounted on said valve casing, and means connected to said rotatable member and passing through a relatively small opening near the tank for turning the turnable portion.

21. In a device of the class described, the comfoination of a liquid storage tank and an air pressure tank, means whereby liquid from the storage tank is fed to the air pressure tank, a first liquid dispensing mechanism, and a second liquid dispensing mechanism, liquid dispensing connections from the pressure tank to each of said dispensing mechanisms, a first valve mechanism and a second valve mechanism, a source of air pressure, means for connecting the source of air pressure ta each of said valve mechanisms, means for connecting one of said valve mechanisms to the atmosphere, and a connection from one of said valve mechanisms to the other, and instrumentalities constructed and arranged whereby to cause the source of air pressure to pass through said connection in one direction for, causing the dispensing operation to take place in one of said mechanisms, and for causing air pressure to pass through said connection in the opposite direction for relieving the air pressure in the pressure tank.

22. In a device of the class described, the combination of a liquid storagetank and an air pressure tank, means whereby liquid from the'storage tank is fed to the air pressure tank, a liquid dispensing mechanism having connections to the pressure tank, a source of air pressure, and a valve mechanism including a casing having two spacedapart valve seats providing three internal chambers, an air pressure connection fromone of said chambers to the source of air pressure, an air pressure connection from another of said cham bers to the pressure tank, and an air pressure connection from the third chamber adapted to conmeet to the atmosphere, a manually shiitable her, said valves being constructed and arranged pensing mechanism having connections to the valve operated mechanism, a first valve adapted to control the bonnections from the first mentioned chamber to the second mentioned chamher, and a second valve for controlling communication between the second mentioned chamber 30 and the third mentioned chamber, said valves, being constructed and arranged so that when said second valve is in closed position said first valve will be in open position, and vice versa. 23. In a device of the class described, the contbination of a liquid storage tank and an air pressure tank, means whereby liquid from the storage tank is fed to the air pressure tank, a liquid dispensing mechanism having connections to the pressure tank, asource of air pressure, and a valve mechanism including a casing having twospaced-apart valve seats providing three internal chambers, an air pressure connection from one of. said chambers to the source of air pressure, an air pressure connection from another of said chambers to the pressure tank, and an air pressure connection from the third chamber adapted to connect to the atmosphere, a manually shiftable valve operated mechanism, a first valve adapted to control the connections from the first mentioned chamber to the second mentioned chamber, and a second valve for controlling communication between the second mentioned chamber and the third mentioned chamso that when said second valve is in closed position said first valve will be in open position, and vice versa, said second valve beingconstructed and arranged to close before the opening'oi said first valve.

24. In a device of the class described, the combination of a liquid storage tank and an air pressure tank, means whereby liquid from the storage tank is fed to the air pressure tank, a liquid dispressure tank, a source of air pressure,.and a. valve mechanism including a casing having two spaced-apart valve seats providing three internal chambers, an air pressure connection from one of said chambers to the sourceof air pressure, an air pressure connection from the sec-- ond of said chambers to the pressure tank, and an air pressure connection from the third chamber adapted to connect to atmosphere, a longitudinally shiftable valve rod passing through said casing and through said chambers, a first valve rigidly mounted on said valve rod, and I adapted to control communication between said first and second chambers, and a. second valve freely slidable on said valve rod and adapted to control communication between said second and third chambers, a pressure relief spring yieldingly connected between said valve rodand said second valve, another spring normally shifting said valve rod in predetermined direction,'and manual 5 means for shifting said valve rod in the opposite direction.

25. In a device of the class described, the combination of a liquid storage tank and an air pressure tank, means whereby liquid from the storage tank is fed to the air pressure tank, a liquid dispensing mechanism having connections to the pressure tank, a source of air pressure, and a valve mechanism including a casing having two spaced-apart valve seats providmg three internal chambers, an air pressure connection from one of said chambers to the source of air pressure, an air pressure connection from the'second of said chambers to the pressure tank, and an air pressure connection from the third chamber adapted to connect to atmosphere, a longitudinally shittable valve rod passing through said casing and through said chambers, a first valve rigidly mounted on said valve rod, and adapted to control communication between said first and second chambers, and'a second valve freely slidable on said valve rod and adapted to-control communication between said second and third chambers, a pressure relief spring yieldingly connected between said valve rodand said second valve, another spring normallly shifting said valve rod in predetermined direction, a manually shiftable hoolr adapted to be shifted from a substantially

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