US2548354A

US2548354A - Attachment for filling and draining fuel tanks

Info

Publication number: US2548354A
Authority: US
Inventors: Robert H Davies
Original assignee: Parker Appliance Co
Current assignee: Parker Appliance Co
Priority date: 1947-11-13
Filing date: 1947-11-13
Publication date: 1951-04-10
Anticipated expiration: 1968-04-10

Description

April 10, W51 R. H. DAVIES 5 ATTACHMENT FOR FILLING AND DRAINING FUEL TANKS I Filed Noy. 15, 1947 4 Sheets-Sheet 1 April 10, 1951 R. H. DAVIES 4 ATTACHMENT FOR FILLING AND DRAINING FUEL TANKS Filed Nov. 13, 1947 4 Sheets-Sheet 2 w awvwvtom firm mm Aprifi m, 1955 R. H. DAWES 2,548,354

ATTACHMENT FOR FILLING AND DRAINING FUEL TANKS Filed Nov. 15, 1947 4 Sheets-Sheet s gmcxwfov 7%. km

R. H. DAVIES 2,548,354

ATTACHMENT FOR FILLING AND DRAINING FUEL TANKS A ay w, 1951 4 sheets-sheet 4 Filed NOV. 13, 1947 b'wwm WW8 Patented Apr. 10, 1951 ATTACHMENT FOR FILLING AND DBAINING FUEL TANKS Robert H. Davies, Aurora Township, Portage County, Ohio, assignor to The Parker Appliance Company, Cleveland, Ohio, a corporation of Ohio Application November 13, 1947, Serial No. 785,755

18 Claims. 1

The invention relates to new and useful improvements in an attachment for tanks for filling or for emptying and draining the same.

An object of the invention is to provide an attachment of the above typewherein a single Valve member may be used for automatically controlling the filling of the tank to a predetermined level and also for controlling the emptying of the tank.

A further object of the invention is to provide an attachment of the above type wherein the single valve member cooperates with a lower valve seat for the closing of the tank after filling or emptying and cooperates with an upper valve seat for automatically stopping the flow of fluid to the tank when it is filled to a predetermined level.

A still further object of the invention is to provide an attachment of theabove type wherein the valve is manually lifted free of a lower valve seat to permit the how of fluid past both valve seats to the tank for fillin and wherein said valve is automatically shifted intoengagement with the upper valve seat when the fluid in the tank reaches a predetermined level. v

A still further object of the invention is to provide an attachment of the above type wherein the valve is automatically shifted for stopping the fluid flow for filling by means of a 'shiftable member connected thereto which shiftable member is operated by a differential in pressure on opposite sides thereof controlled by a float operated valve.

These and other objects will in part be obvious and will in part be hereinafter more fully dis closed.

In the drawings:

Figure 1 is a vertical sectional view through an attachment embodying the improvements, showing the valve in position for closing the inlet and outlet opening to the tank, also showing in vertical section the float controlled valve associated with the attachment;

Figure 2 is a view similar to Figure 1 but showing the filling nozzle secured to the housing of the attachment with the valve controlling the nozzle raised and the valve of the attachment lifted from its seat so as to permit free flow of fluid from the nozzle to the tank;

Figure 3 is a view similar to Figure 2, but showing the control valve for the filling unit as shifted into contact with the upper valve seat for stopping the fiow of fluid therethrough to the tank. The float control valve is also shifted by the fluid level in the tank; and

Figure 4 is a vertical sectional view of the filling attachment showing a modified form of means for controlling the differential pressure which shifts the valve so as to stop the flow when the fluid in the tank reaches a predetermined level. The improved attachment includes a housing which is adapted to be attached to the wall of a tank. The housing is preferably disposed within the tank and connected to the bottom wall thereof. The housing has an opening in the lower side thereof which is surrounded by a valve seat and an inwardly opening valve is normally spring pressed against the seat. The valve housing has a chamber above the valve seat in which said Valve is located and operates. There is an opening at the upper side of this chamber surrounded at its lower side by a second valve seat and the valve member is adapted to be shifted so as to engage the. second valve seat for stopping the flow of fluid therethrough. The housinghas ports leading to the tank above this second valve seat. A spring arranged within thehousing' bears on the valve for moving the same into engagement. with the lower seat. Y

The attachment is provided with mechanical- 1y operated means for raising the valve from its seat a sumcient distance to permit free flow of fluid past the valve and the upper valve seat to the ports leading to the tank- The valve is raised into engagement with the upper valve seat for stopping the flow to the tank by automatic means which includes in the present illustrated embodiment to. the invention a flexible diaphragm connected to the, housing so as to provide a closed chamber above the diaphragm. This diaphragm is also connected to the valve. When the diaphragm. is flexed upwardly,.the valve will be moved into engagement with the upper valve seat for stopping the flow. The position of the diaphragm is controlled by a float actuated valve which causes a diflerential pressure on opposite sides of the diaphragm when the tank is filled to apredetermined level so as to raise the valve for stopping the flow tov the tank.

Referring more in detail to the drawings, the improved attachment for filling. and draining a tank includes a housing I provided with a laterallyextending flange. 2 which is secured to the bottom wall- 3 of the tank by suitable bolts E. The gasket 5-is provided between the flange and the wall of the tank so as to form a tight connection between the tank and the housing I. Secured to the under side of the flange 2 of the housing is an annular. sleeve member 6 which hasran opening? therethrough. Thisopening -at its upper face is surrounded by a. tapered valve seat 8.

The housing is provided, as shown in Figures 1-3, with a partition wall 9 having an opening l therethrough. This opening is surrounded at its lower side by a tapered valve seat ll. Disposed at a short distance above the partition 9 is another partition l2. The wall of the housing between the partitions 9 and I2 is provided with a series of ports [3, l3 leading to the tank. The housing is closed at its upper end by a cap i4. Disposed between the cap and the upper end of the housing is a, flexible diaphragm IS. The cap is secured to the housing by suitable bolts I6, l6, and the diaphragm is clamped by these bolts when the cap is secured to the housing.

Disposed within the chamber between the valve seats is a single valve member ll. This valve member has an inserted gasket 18 which is adapted to engage the valve seat 8 when the -valve is lowered to a closed position, as shown in Figure 1. The valve member also has a tapered portion l9 which engages the valve seat I I when the valve is in its raised position, as shown in Figure 3.

The valve is provided with a stem 20 which extends through a boss 2| on the lower side of the partition l2. Within this boss is a packing 22 so that the chamber between the diaphragm and the partition I2 is a closed chamber. Likewise, the chamber between the diaphragm and the cap is a closed chamber. A spring 23 surrounds the boss 2| and also a boss 24 at the base of the valve stem 20 and serves normally to press the valve in a downward direction into engagement with the valve seat 8, as shown in Figure 1. This spring, however, may be omitted under certain conditions and gravity or the head of the fluid depended upon for moving the valve into engagement with the seat 8.

The portion of the head of the nozzle for filling and emptying the tank is shown in Figures 2 and 3 of the drawings. This nozzle and the means associated therewith for controlling the flow of inner end of this sleeve 25 which engages a seat or shoulderonthe sleeve 6 of the attachment. An outer sleeve 21 is adapted to secure the nozzle to the sleeve 6 of the filling and draining attachment. The nozzle is provided with avalve seat 28 and a valve 29 cooperates with the valve seat for closing the nozzle and preventing the flow of fluid therefrom. This valve 29 is carried by a valve stem 30 which is mechanically operated. When it is desired to fill the tank, the nozzle is attached to the filling and draining attachment and then the valve 29 is raised by manipulation of the mechanical operating means therefor and this will force the valve l'l away from the valve seat 8. The valve is lifted only a short distance from the valve seat and not sufficient so as to contact with the upper seat II. This will permit free flow of fluid past the valve member and through the ports l3 to the tank.

When the tank has been filled to a predetermined level this valve member I! will be automatically shifted into engagement with the upper valve seat H and stop further flow of fluid to the tank. This automatic shifting of the valve H is accomplished by a variation in the pressure on opposite sides of the diaphragm [5. The diaphragm I5 is a flexible member reinforced on opposite sides thereof and throughout the center region of the diaphragm by plates 3| and 32. The differential in the pressure on opposite sides of the diaphragm is controlled by a valve which in turn is controlled by a float shifted by the contact of the liquid in the tank. This valve includes a casing 33 carried by a bracket member 34 secured to the tank.

Within the valve casing is a shiftable valve 35 having a piston 36 at one end thereof and a piston 31 at the other end thereof. There is a port 38 at the upper end of the valve casing to which a tube 39 is connected. This tube is connected through the port 49 with the chamber at the lower side of the diaphragm. At the lower side of the casing 33 there is a port 4| which is connected to a tube 42 and the tube 42 is in turn connected to the port 43 leading to the chamber above the diaphragm. There is a port 44 in the valve casing which is connected to a tube 45 and this tube in turn is connected to a port 46 leading to the chamber containing the valve member I]. The valve 35 is connected by means of a pin 4'! to a lever 48. The lever 48 is pivoted at 49 to a collar 50 on the bracket 34. A float 5! is attached to the outer end of the lever.

The valve chamber within the casing 33 has

ports

52 and 53 leading to the interior of the tank. When the level of the liquid in the tank is below normal, the float 5| will drop and shift the valve to the position shown in Figure 2. This is the position of the valve which permits a filling of the tank. When the nozzle is attached and the valve 29 raised, thus lifting the valve I! from its seat, fluid under pressure on the line for filling will also pass through the tube 45 to the control valve and from the control valve to the tube 42 to the upper chamber above the diaphragm.

At this time the chamber beneath the diaphragm is connected through the tube 39 to the port 52 leading to the atmosphere within the tank abovepthe liquid level. The differential in pressure therefore on the diaphragm is such as to hold the valve H in firm contact with the valve 29 during the filling operation. This pressure on the diaphragm which holds the valve ll against the valve 29 is, of course, in addition to the spring pressure and'insures that the valve 11 will not move to closed position during the filling operation. When the tank is filled to a predetermined level, the float 5| will be lifted and will shift the valve 35 to the position shown in Figure 3. This will connect the tube 45 with the tube 39 and fluid flow from the nozzle will be shifted to the lower chamber beneath the diaphragm. At the same time, the tube 42 will be connected through the port 53 with the atmosphere in the tank above the liquid level. This will provide a pressure on the under side of the diaphragm which will shift the valve I! into engagement with the valve seat II. This will stop the flow of fluid to the tank. There is no gasket associated with the portion of the valve engaging the seat II, as any slight leakage therethrough will be unimportant.

The main flow of the fluid to the tank will be stopped when this valve engages the seat H. The operator will then close the nozzle valve 29. This cuts off flow of fluid to the filling attachment.

tween supporting spiders 62.

There is a port 54, in the. wall ofthe. housing leading: tov the chamber; between. the valve seats and when theflow of fluid is out. 01f. byi-the closing of the nozzle. valve, the, pressurein theohamber below the: diaphragm will drop and the valve through the actionor the spring thereon will move downward into contact with the valve seat 8. The nozzle, can then. be detached and the valve IT, beingin closed position, effectively closes the tank.

If it. is; desired. to empty or drain the tank, a nozzle without any fluid supply is connected. to the housing. Means associated with the nozzle and mechanically operated in any suitable wayis brought into engagement with the valve 51 for lifting the valve from the seat 8 to the position shown in, Figure 2. The. fluid from the tank will then, flow freely out through the ports l3. past the two valve seats and into the nozzle and is to be dischargedfrom the nozzle.

Inthemodified form of attachment shown in Figure 4, the construction and operation of. parts are very similar to thosedescribed above. A single valve member disposed: between upper and lower valve seats is moved to an intermediate position for filling and for emptying the tank and is automatically moved intoengagement with. the upper seat when the tank is filled to a predetermined level. It also-shifts to a position where it engages the lower valve-seat when the fluid supply is cut oil.

The main housing 550i the attachmentis secured to the bottom-wall 3 of the tank by suitable bolts 56, fitwhichpass through a. flange car ried by a housing and the wall of the tank. Attached to the main, portion of the housing is a depending sleeve section 51- provided with an opening 53.. surrounded by the lower valve seat 59. The housing 55 has a partitionlfill. extending across the same av short distance above the lower valve seat. This partition has openings 6|. be-

Surrounding the openings 6! is an upper valve seat 63. A valve member 64. is disposed in the chamber between the valve seats 59 and 63. This. valve member carries a gasket 65 which is adapted to engage the valve seat 59. for closing the filling opening. The valve also has a tapered seat 66. whichis adapted to engage the valve seat 64 for stopping the flow of fluid to the tank. The upper end of the housing is closed by a cap 61. Between, the cap and the valve housing. is a diaphragm. 6.18. Said diaphragm extends between the cap, and housing and is clamped theretov by the bolts 69; 69 which secure the cap. to. the housing. This diaphragm has the usual reinforcing plates Hi and H in the central portion thereof. The-lower side of the diaphragm isopen, to the ports 12in the wall of the-housing through which fluid flows from the housing into the tank. When the tank isbeing filled the lower side of the diaphragm is subject to the pressure on the fluid being sup,- plied.

The valve 6 is provided witha valve stem. l3 which isconnected to the valve member 96. The

spiders

62, 52 carry a hub '35. which provides a bearing for the stem l3; 'A spring 56 disposed between the supporting spiders t2 and the valve normally tends to move the valve downward to carry the same into engagement with the valve seat 59. This spring may be dispensed with.

There is a port 71 in the wall of the housing which connects the chamber 18 between the valve seats with the chamber l9 formed in the cap 67 above the diaphragm. The diaphragm has an openin 80therethrough. The cap 61 is provided with a: port: 8i to. which is connected a tube 82. The. other end'ofthetubeis connectedto a valve casing 83. Disposedwithin the valv casing 83 is a valve 84 which. is rectangular in cross section. The casing has a recess which is circular in cross section so that there is a. spacebetween the valve and thecasing. The valve is taperedat its lower end, as indicated attlS, and is adapted to engage a. valve seat: surrounding the port 86 which, leads tothe tube 82-. Whenthe valve is lowered, it contacts with the seat and closes this port and when it israised, then theport is open to the atmosphere in the upper part of the tank. This valve casing 83 iscarried by a collar 87 which is shiftable on a supporting bracket 83'. Pivoted to this supporting collar 87 is a lever 39. Said lever is pivoted at 93 to the. bracket and carries at its outer end a float! I.

When the parts are in the position shown in Figure 4 the float is in lowered position and. the valve is closed. When the fluid of the tank rises to a level where the float will be lifted, then the valve will be opened.

When the tank is in the condition so that it should be filled, the float 9i is in its lowered position and the valve is closed. The operator attaches a filling nozzle such as shown in Figures 2 and 3 to the sleeve 51 and the valve controlling the nozzle and shown in dotted lines in Figure 4 .is raised so asJto lift the valve fit from the seat 53. The valve is raised only a short distance from the seat so that the fluid from the supply will pass around the valve and through the valve seat 63 and out through the openings i-Z into the tank.

The fluid being supplied will also pass through the port ll into the chamber l9 and this will produce a pressure on the upper side of the diaphragm which balance the fluid pressure on the under side of the diaphragm so long as the valve remains in closed position. When the fluid in the tank reaches a level so as to liftthe float 9i and open the valve, then the fluid pressure on the lower side of the diaphragm will be. greater than the fluid pressure on the upper side of the diaphragm. The reason for this is that the port 8 l is larger than the port ll so that the pressure is being released through the open valve as faster than it can build up in the chamber 19. This will cause the diaphragm to move upward and shift the valve 6'4 so that the tapered portion 66 thereoi will engage the seat 63' and stop the flow of fluid to the tank. The operator now closes the nozzle valve and when the nozzle valve is closed, fluid pressure against theunder side of the valve 64 ceases and-fluid pressure against the diaphragm due'to the weight of th fluid in the tank will be balanced on opposite sides of the diaphragm and therefore the spring it will move the valve 6-4 so as to bring the gasket into contact with the seat 59 and thus close the opening at the lower side of the housing.

When it is desired to empty the tank, a draining nozzl is attached which is provided with a means for lifting the valve 65 0f? from its seat 59 andthis will permit thefiuid to flow freely out through the draining nozzle.

The operation of. the filling and emptying or draining attachment has been described in connection with the detailed description of the em.- bodiments of the invention shownin the drawings.

It is noted that the attachment is verysimple and includes only one-valve which innormal position closes theinlet and-outlet opening at the bottom of the housing. This valve is raised. from its seat by the operator when he attaches the nozzle for the filling of the tank and the raising of the valve is only suflicient to permit free flow of fluid to the tank. When the tank is filled, then the valve moves into contact with the upper seat and stops the flow of fluid to the tank. This is a very simple arrangement for filling and for automatically stopping the flow of fluid to the tank when the level of the fluid reaches a predetermined point.

When it is desired to empty or drain the tank, this can be done very quickly and efiiciently by attaching a draining nozzle and lifting the valve from its seat sufficiently to permit the free flow of fluid from the tank past the valve and out through the draining nozzle.

It is obvious that many changes in the details of construction may be made without departing from the spirit of the invention as set forth in the appended clai ms.

I claim:

1. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end and an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, means for attaching a source of fluid supply under pressure to said housing and in communication with said inlet port, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat or closing the opening to the housing, said valve being adapted to be raised to a position intermediate the valve seats for permitting the flow of fluid under pressure past the valve seats, and means responsive to the pressure of' said fluid for raising the valve into engagement with the upper seat for closing the opening therethrough, said last named means being controlled by the level of liquid in the tank.

2. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end and an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the housing, said valve being adapted to be raised to a position intermediate the valve seats for permitting the flow of fluid past the valve seats, a reciprocal member connected to said valve, and means controlled by the level of liquid in the tank for creating a differential pressure on said reciprocal member whereby said valve is moved into engagement with the upper seat for closing the opening therethrough When the liquid in the tank reaches a predetermined level.

3. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end and an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the housing, said valve being adapted to be raised to a position intermediate the valve seats for permitting the flow of fluid past the valve seats, a diaphragm extending across the housing and connected to said valve, means controlled by the level of liquid in the tank for creating a differential pressure on said diaphragm whereby the valve will be moved into engagement with the upper seat for closing the opening therethrough when the liquid in the tank reaches a predetermined level.

4. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end thereof, an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the housing, externally operated manual means for raising the valve to a position intermediate the valve seats, and automatic means responsive to fluid pressure for raising the valve into engagement with the upper seat for closing the opening therethrough, said last named means being controlled by the level of liquid in the tank.

5. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end thereof, an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the housing, manual means for raising the valve to a position intermediate the valve seats, a reciprocal member connected to said valve, and means controlled by the level of liquid in the tank for creating a differential pressure on said reciprocal member whereby said valve is moved into engagement with the upper seat for closing the opening therethrough when the liquid in the tank reaches a predetermined level.

6. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end thereof, an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the housing, manual means for raising the valve to a position intermediate the valve seats, a diaphragm extending across the housing and connected to said valve, means controlled by the level of liquid in the tank for creating a differential pressure on said diaphragm whereby the valve will be moved into engagement with the upper seat for closing the opening therethrough when the liquid in the tank reaches a predetermined level.

7. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end thereof, an upwardly facing valve seat surrounding said open-' ing, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the housing, manual means for raising the valve to a position intermediate the valve seats, said housing having a partition extending across the same above the ports leading to the tank and providinga closed chamber in the upper end of the housing, a diaphragm tending across said chamber and dividing the same into upper and lower compartments, a valve stem connected to the valve and extending through said partition and connected to said diaphragm, and means controlled by the level of the liquid in the tank for creating a differential pressure on said diaphragm for moving the valve into engagement with the upper seat for closing the opening therethrough when the liquid in the tank reaches a predetermined level.

8. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end thereof, an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the housing, manual means for raising the valve to a position intermediate the valve seats, said housing having a partition extending across the same above the ports leading'to the tank and providing a closed chamber in the upper end of the housing, a diaphragm extending across said chamber and dividing the same into upper and lower com partments, a valve stem connected to the valve and extending through said partition and connected to said diaphragm, an auxiliary valve casing disposed in said tank adjacent the maximum liquid level in the tank, a float controlled piston valve disposed in said auxiliary valve casing, said valve casing having ports at the opposite ends thereof leading to the atmosphere in the tank, a tube connecting the upper end of the valve casing with the lower compartment in the housing, a tube connecting the lower end of the valve casing with the upper compartment in the housing, a tube connecting the valve casing centrally thereof to the housing chamber in which the valve member is disposed whereby the shifting of the valve in the valve housing will create a differential pressure on the underside of the diaphragm for automatically moving the valve into engagement with the upper seat when the liquid in the tank reaches a predetermined level and for permitting said valve to move into engagement with the lower seat when the manually operated means is withdrawn and the fluid supply to the housing out off.

9. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end thereof, an" up wardly facing valve seat surrounding said'opz'en ing, said housing having a second 'downw'ardls facing valve seat disposed inwardly from the first named valve seat, said housing being provided with ports connected to the tank and disposed above said second valve seat, a single valve member disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for 'closing the opening to the housing, a filling nozzle adapted to be attached to said housing, a valve associated with the filling nozzle and manually operable for raising the housing valve to a position intermediate the valve seats, and automatic means for raising the housing valve from engagement with the nozzle valve into engagement with the upper seat for closing the opening therethrough, said last named means being controlled by the level of liquid in the tank.

10. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening at the lower end thereof, an upwardly facing valve seat surrounding said opening, said housing having a second downwardly facing valve seat disposed inwardly from the first named valve seat, said housing being provided 7 with ports connected to the tank and disposed above said second valve seat, a single valve mem ber disposed in the housing between the valve seats, yielding means for moving the valve into engagement with the lower seat for closing the opening to the-housing, a filling nozzle adapted to be attached to said housing, a valve associated with the filling nozzle and manually ciperable for raising the housing valve to a .position intermediate the valve seats, a reciprocal member in the housing connected to said housing valve, and means controlled by the level of liquid in the tank for creating a differential pressure on said reciprocal member for raising the housing valve from the nozzle valve into engagement with the upper seat when the liquid in the tank reaches a predetermined level, and means whereby said housing valve will move into engagement with this lower seat when released by the nozzle valve and the fluid supply is cut. off.

11. The combination of a housing 'adapte'dto be attached to the wall of a tank,'said housing having a valve chamber and spaced inlet and outlet ports communicating with said chamber, means for attaching a source of fluid supply under pressure to said housing and in communication with said inlet port, a single valve member within said chamber for controlling the flow of fluid through said ports, said valve being adapted to be moved to a position intermediate the inlet and outlet ports for permitting the flow of fluid through 'both said ports, and means responsive to the pressure of said fluid for moving said valve member into closing relation with said outlet port, said last named means being controlled by the level of liquid in the tank.

12. The combination of a housing for attachment to the wall of a tank, said housing having a valve chamber, anopening at the lower end of said chamber and a valve seat surrounding said opening, a second opening at the upper end of said chamber also surrounded by a valve seat, a single valve member in said housing between said valve seats, yielding means for moving the valve into engagement with the lower seat for 010sing said lower opening, said valve being adapted to be ra-isedto a position intermediate said seats for permitting the flow of fluid past the seats, said housing having a pressure chamber above said upper opening, a reciprocal member closing the lower end of said pressure chamber and attached to said valve member for movement therewith, means for directing fluid under pressure from said valve chamber to said upper chamber for acting upon said reciprocal member to prevent the valve from moving into engagement with the upper seat, and means controlled by the level of the liquid within the tank for relieving the pressure of the fluid within said pressure chamber whereby the valve may be moved against said upper seat by the pressure of the fluid passing through said valve seats and acting upon both the valve member and the reciprocal member.

13. The combination of a housing adapted to be attached to the wall of a tank, said housing having a valve chamber and an inlet port and outlet port communicating with said chamber, means for attaching a source of fluid supply under pressure to said housing and in communication with said inlet port valve means within said chamber for controlling the flow oi fluid throughsaid ports, said valve means in a first position being adapted to close one of said ports, and in a second position being adapted to open both said ports, yieldable means for urging said valve means to said first position, said valve means being adapted to be mechanically moved to said second position, said valve means in a third position being adapted to close ofi the other of said ports, and means responsive to the pressure of said fluid for moving said valve means to said third position.

14. The combination of a housing adapted to be attached to the wall of a tank, said housing having a valve chamber and an inlet port and outlet port communicating with said chamber means for attaching a source of fluid supply under pressure to said housing and in communication with said inlet port, valve means within said chamber for controlling the flow of fluid through said port, said valve means comprising two separate valve faces controlling the respective ports and operatively connected whereby they may be moved as a unit, a first position for said valve means wherein one of said faces closes oiT said inlet port, yieldable means for urging said valve means to said first position, a second position for said valve means wherein both ports are open, said valve means being adapted to be moved to said second position, a third position for said valve means wherein the other of said valve faces closes ofi the outlet port, and means responsive to the pressure of said fluid for moving said valve means to said third position.

15. The combination of a housing adapted to be attached to the wall of a tank, said housing having a valve chamber and an inlet port and outlet port communicating with said chamber means for attaching a source of fluid supply under pressure to said housing and in communication with said inlet port, valve means within said chamber for controlling the fiow of fluid through said port, said valve means comprising two separate valve faces controlling the respective ports and operatively connected whereby they may be moved as a unit, a first position for said valve means wherein one of said faces closes off said inlet port, yieldable means for urging said valve means to said first position, a second position for said valve means wherein both ports are open, said valve means being adapted to be moved to said second position, a third position for said valve means wherein the other of said valve faces closes off the outlet port, and means responsive 12 to the pressure of said fluid for moving said valveto said third position, said last named means being controlled by the level of the liquid in the tank.

16. The combination of a housing adapted to be attached to the wall of a tank, said housing having'an opening surrounded by a first valve seat, said housing having a second valve seat spaced from the first valve seat and a port leading from said second valve seat to the interior of the tank, a valve member disposed between the valve seats, extendable means operable to position said valve member intermediate the valve seats for permitting the flow of liquid past the valve seats, automatic means for moving the valve member into engagement with the second seat for closing the port leading to the tank, said automatic means being controlled by the level of liquid in the tank, and means for rendering said automatic means inoperative upon retraction of said extendable means.

17. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening surrounded by a first valve seat, said housing having a second valve seat spaced from the first valve seat and a port leading from said second valve seat to the interior of the tank, a valve member disposed between the valve seats, yieldable means biasing said valve member toward said first valve seat, extendable means operable to position said valve member intermediate the valve seats for permitting the flow of liquid past the valve seats, automatic means for moving the valve member into engagement with the second seat for closing the port leading to the tank, said automatic means being controlled by the level of liquid in the tank, and means for. rendering said automatic means inoperative upon retiraction of said extendable means, said yieldable means being efiective to return the valve member-to said first seat upon said automatic means being rendered inoperative regardless of the level of the liquid in the tank.

18. The combination of a housing adapted to be attached to the wall of a tank, said housing having an opening surrounded by a first valve seat, means for introducing liquid under pressure to said opening, means for cutting off the supply of liquid under pressure to said opening, said housing having a second valve seat spaced from the first valve seat and a port leading from said second valve seat to the interior of the tank, a valve member disposed between the valve seats, yieldable means biasing said valve member toward said first valve seat for closing the opening to the housing, means operable to position said valve member intermediate the valve seats, automatic means for moving the valve member into engagement with the second seat for closing the port leading to the tank, said automatic means being controlled by the level of liquid in the tank, means for rendering said automatic means inoperative upon the cutting off of the supply of liquid under pressure to said opening, regardless of the level of liquid within the tank.

ROBERT H. DAVIES.

REFERENCES CITED UNITED STATES PATENTS Name Date Russell Oct. 29, 1935 Number