.Oct 15» w45- J. F. MELICHAR ETAL 2,409,220 SUM? SELECTOR VALVE 'Filed May 13, 1943 2 Sheets-Sheet 1 @ci F5, ìâââ. J. F. MELICHAR EI‘AL 2,409,220 SUMP SELECTOR VALVE Filed May 13, 1945 2 Sheets-Sheet 2 mazze Patented Oct. l5, 1946 STTS 2,409,220 SUM? SELECTOR VALVE .Joseph F. Melichar and Wilton Margrave, Cleveland, Ohio, assignors to The Parker Appli ance Company, Cleveland, Ohio, a corporation of Ohio Application ,May 13, 1943, Serial No. 486,862. (Cl. 251-121) The invention relates to certain _new and use~ ful improvements in sump selector valves .adapted for `use in fuel supply tanks of aircraft in the manner disclosed in U. S. Letters Patent 2 vision of `10W pressure areas at the inlet side of the respective ball valve tending to Vhold the ball valve against the baffle during slight tilting of the valve structure. A further object of the invention is to provide in a valve structure> combination of the character stated a vvalve seat including dual seating por 2,332,007, issued to Arthur L. Parker October 19, 194'3. In an airplane the fuel supply tank is mounted tions, one of which is very sensitive and e'fñcient ' ñxedly relative to the frame structure in such po when the ball engages and is seated thereagainst sition that the longitudinal axis of the tank will be disposed substantially horizontallyv when the ll) with a very slight force, such as when the angle airplane assumes level ilight. When the air plane is at rest on the ground, the tank is tilted upward so that the fuel lies at the back end of the tank, and the tank will remain tilted until the airplane has reached the desired altitude and assumes a level flight. During flight, the tank will be tilted more or less as the airplane moves upward or downward and during banking in the making of turns. In order to avoid the delivery of air into the engine fuel lines as a result of un« covering of a line inlet in the tank due to tilting of tilt of the valve structure is very slight or when the suction pull is very slight, and the other of which is a bumper seat portion eñicient when the ball engages and seats thereon at greater seating forces and which is so disposed relative to said >sensitive seat as to prevent wedging _of `the ball in the `sensitive seat. A further object of the invention is to Aprovide in a valve structure `of the character stated and including a valve seat having a Iirst engaged sensitive seat portion and a second engaged bumper seat portion, »a seat mounting or keeper of the tank, there is provided a plurality of fuel ring having a flange portion so disposed relative dispensing pipes which terminate adjacent the to said sensitive and bumper seat portions -as to ends of the tank, or at widely spaced points in constitute a third engaged metal seat portion or the tank, with which pipes is associated a sump stop shoulder eiîective to limit compression of the selector valve mounted for tilting movement with ball valve on the sensitive and bumper-seats. the tank and which is so disposed that gravity~ With the above and other objects Ain `View `that actuated valves therein will control the dispens will hereinafter appear, the nature of the inven ing pipes whereby fuel will be supplied solely from the pipe leading to the lowermost position 30 tion will be more fully understood by following the detailed description, the appendedclaims and in the tank during its tilting movements. It is the several views illustrated `in the `accompanying a purpose of the present invention to provide a novel improved form of sump selector valve drawings. adaptable for the above stated uses. An object of the invention is to provide an improved seat and ball valve combination so con~ structed and arranged that the ball valve will have proper engagement with the seat, to cut 01T the now of the liquid fuel, upon slight tilting of the valve casing from the horizontal when the seating component, of the ball valve is consider ably less than the weight of the ball valve. A further object of the invention is to provide a Vbaille between the inlet port and `the ball valve effective to direct the incoming fluid around the ball Without impinging fully and l,directly against the ball, thereby preventing chattering of the und seated ball. A further object of the invention is to pro-ì vide a baffle of the character stated having open ings therein for directing incoming fluid around the ball and in which there is included a central opening of limited area designed to cooperate with the first mentioned o-penings and the ad jacent valve inlet opening in avoiding thev pro In the drawings: Y Y - - “ ‘ , , Figure 1 is a central longitudinal section `illus trating the improved valve structure. Figure 2 Ais a central vertical cross section of the valve structure illustrated in Figure 1, the center baffle being shown in elevation. Figure 3 is a vertical cross Section of the valve casing per se taken through one ball chamber thereof and looking toward the center of the casing. Figure 4 is an enlarged fragmentary sectional view somewhat diagrammatically illustrating the manner in which a ball valve contacts the oo operating ring seat. Figure 5 is a vertical cross .section of one ¿of the ring seats per se. Figure 6 is a face View of the ring seat illus 50 trated in Figure 5. Figure 7 is a face view of one of -the inlet bañles. The improved sump selector valve comprises a casing 5 which is generally ,cylindriiorm in shape and open at both ends. The casing isipro 2,409,220 3 4 vided centrally of its length with an outlet open related to the bumper shoulder seat I9 as to act ing 6 which is disposed perpendicularly with re as a supplement therefor effective whenever tilt spect to the longitudinal axis of .the casing and ing of the casing at an exaggerated angle forces opens downwardly in the manner clearly illus the ball against the seat I9 with sufficient pres trated in Figure 1. Inlet openings are provided CII sure to deform the shoulder I9 and permit the in the respective ends 1 of the casing, and within ball to come against the rigid stop I1 and there each end of the casing is formed a ball valve by positively limit movement of the ball into the chamber 8, and a central now chamber 9 being seat. From the foregoing it will be apparent that disposed in the center of the casing between said each ring seat equipment provides a ñrst con ball chambers and communicating therewith tacted very flexible line contact seat 2 I, a second through circular openings IU. ' contacted less yieldable bumper seat I9 and a It is to be understood that the respective ends third .contacted rigid stop seat I1. 1 of the casing are adapted to be connected by An annular recess 24 is provided beside each ducts or pipe lines with the fuel tank of an air mounting ring I5 for the purpose of removably plane, said pipes or ducts opening into the tank receiving a snap ring retainer 25 effective to at spaced points so that one at least thereof al secure the ring I5 in place in ‘the manner clearly Ways will be connected with the fuel supply illustrated in Figures 1 and 4 of the drawings. A whereas the other may be open at times to air clearance 26 is provided in the casing wall in in the tank in Ithe manner clearly disclosed in each chamber 8 so as to render the respective U. S. Letters Patent 2,332,007, issued to Arthur L. recess 24 accessible in a manner for facilitating Parker, October 19, 1943, and hereinbefore re removal of the respective snap ring retainer 25. ferred to. 'I'he outlet opening 6 is adapted to be See Figure 3. connected by a pipe or conduit with the booster At its central portion, directly over the outlet pump usually provided, and through said pump opening 6, the casing 5 is provided with an open with the engine to be supplied with fuel. N) Ul ing 21 which is closed by a removably mounted The casing wall in which each fuel supply or closure cap 23, said cap being secured fluid-tight Y seat opening I0 is formed is provided endwise against a recessed gasket 29 in the manner clearly with a seat recess I I which is undercut as at I2 to illustrated in Figures 1 and 2. The cap includes a provide an overhanging shoulder, the inner edge center boss or plug extension which depends in corner of which is rounded as at I3 for a purpose that will later become apparent. A valve seat ring I4 formed of rubber or other equivalent yieldable material is mounted in each recess II, being removably held therein by a metal mount the casing opening 21, said boss being provided with a depending center baffle 3| which is slightly wider than the diameter of the casing openings i0 and is rounded as at 32 at its lower extremity on an arc the radius of which is slightly greater lng or keeper ring I5 having an inwardly directed 35 than the radius of said openings I0, The baille keeper flange I5. It will be observed by refer 3I is provided with a centrally longitudinally dis ence to Figures 1 and 4 of the drawings that the posed slot 33 and a pendulum member 34 is piv flange I6 of the keeper ring is so disposed as to otally mounted as at 35 in said slot. The pendu provide a rigid seating shoulder I1, lum member is provided at its upper end with One of the yieldable seat rings I4 is illustrated 40 shoulders 36 effective to limit swinging movement in detail ln Figures 5 and 6 of the drawings from of the member in the central vertical plane in which it will be observed that each ring includes cluding the axis of the casing, and at its lower an obtusely angularly recessed face portion I8 end the pendulum member 34 is provided with which results in the provision of a line contact endwise extensions 31 which include arcuate end bumper seat I9 and a relatively thin very flexible faces 38 disposed along the center of the casing lip 20 which projects transversely inwardly’ be in position for contacting the ball valves 22 in the yond the diametrical limit of the respective open manner clearly illustrated in Figure 1. It will ing I0. Each flexible lip is disposed to present a be observed by reference to Figure 1 that the line contact seat shoulder 2| Itoward the re pendulum member extensions are so spaced that spective ball chamber 8. Within each ball cham 50 they will engage with the ball valves 22 and pre ber 8 is provided a plurality of circumferentially vent seating of both balls at any given time. spaced ball guide ribs 23 which are disposed par In order to prevent direct, full force impinge allel the axis of the casing and serve as guides for ment of the incoming fuel with the ball valves 22, the ball valves 22 rollably mounted in the respec an inlet baffle 39 is mounted at each end of the tive chambers 8. By reason of the particular casing in the manner clearly illustrated in Figure mounting of the balls and the formation and l. Each inlet baille includes a convex center por mounting of the respective ring seats in the man tion conforming generally to the curvature of the ner hereinbefore described and clearly illustrated adjacent portion ofthe respective ball valve, and in Figures 1 and 4, a ball valve rolling against the each baille 39 is mounted in an adapter 4I thread cooperating ring seat will ñrst engage in line ably mounted in the respective end of the casing contact with the thin flexible lip 20 as at 2I. 5 and having a recess therein for receiving the pe If the tilt of the .casing is very slight the liquid ripheral edge of the baille 39, the metal defining seal will be effected by line contact of the ball the recess being upset as at 42 to retain the baille only with the lip 20, but when Ithe degree of tilt in assembly with the respective adapter, Each of the casing is suñlcient to cause the ball to de bañle is equipped with outer openings disposed flect the lip 20 to a suflicient extent, .the ball will adjacent the diametric limit of the adjacent ball, next engage the less readily yieldable bumper seat and also with a center opening 44 of limited area shoulder I9, engaging in line contact therewith. which permits a limited amount of direct im This contact with the bumper seat supplements pingement of the incoming fuel with the respec the seat sealing contact of the ball and avoids tive ball valve 22 but not objectionable full force movement of .the ball far enough into the respec impingement such as would~ cause the ball to par tive seat to effect a wedging thereof within the take of violent uncontrolled movements in its lip 20. It will be observed by reference to Figures chamber. The provision of the particular ar 1 and 4 of the drawings that the rigid seat shoul rangement of apertures 43 and 44 avoids the pro der I1 provided on the keeper ring flange I6 is so vision of low _pressure areas at the points 45 in 2,409,220 5 the respective ball valve ,chambers which would tend to hold the ball against the respective baille during slight tilting of the casing. In use, when the valve casing iis tilted so as to cause one ball valve 22 to roll toward the respec tive end baffle 39 and the other ball valve to .roll toward the respective ring seat lâ, the ball 22 rolling toward said seat ring will first .have a light engagement with the very flexible lip 2B, engaging the same inline contact as at 2l in the manner indicated in Figure 4. If the tilt of the 6 »departing from the spirit of our `invention or the scope of the appended claims. We claim.: ' 1. ïn :a valve, the combination of a Yring seat of resilient yieldable material and a valve mem lber movable into and out 4of engagement „with »said ring seat for controlling passage of :duid therethrough, said seat including a first engage able thin benda‘ble annular lip engageable by the valve 'member when moved against the ring seat and leiîective to provide an ei‘ñc'ient Y»line lcontact seal at light pressure contacts lof the casing is very slight the Whole seal Will be effected valve member with the seat ring, and a spaced by the vline contact at _2l and the ball Will remain second engageahle annular yieldable bumper `seat out of contact with the bumper seat i9. If the portion engageabie by the valve member after tilt lof the .casing is sufficient to .cause the ball a bending of the lip by -valve member engage to gravitate against the lip ’20 with suiñcient pres ment and eñe'ctive to provide an eiiîcient seal sure to deñect >or bend the very flexible lip in at 'heavier pressure contacts oi the valve mem the manner indicated in dotted lines in Figure 4, ber with the ,seat ring and to limit the amount the ball will engage in line contact .at lâ with the bumper seat, As previously described, the lip 20 of displacement by 'bending of the first engaged 20 is more readily yieldable `than the bumper seat lip by said valve member. I9. If the degree of tilt of the casing is consid 2. In a valve, the combination of a ring seat er-able the ball will .slightly deiorm the bumper o1” resilient yieldable material and a valve Aball seat i9 Aas Well as the very flexible lip 2Q, but .the movable into and out of engagement with said bumper seat will assure against movement lof the ring seat for controlling passage of ñuid there ball into the lip far enough to wedge in lor dam through, said seat including a ñrst engageable age said lip. Avoidance of any Wedging of the annular thin lip disposed transversely with re ball in the lip 2i] is additionally assured by pro spect to the axis of the ring seat and engageable vision of the positive stop sea-t Il which Will be by the valve ball when moved against the ring come `eîi’ective after slight deformation of the seat and effective to provide an eñicient seal at bumper seat i9 to positively limit movement of the respective ball 22 into the seat opening lil. The rounding of the inner edge portion of the light pressure contacts of the valve ball With the seat ring, and a spaced second engageable an shoulder I2 as at i3 assures against damaging of the thin flexible lip 2li by any pinching action, - valve ball and effective to provide an eñìcient seal at heavier pressure contacts of the valve ball with the seat ring and to limit the movement of the ball Within the said lip and thereby assure against Wedging of the ball in the seat ring. and flexure of the lip in >engagement with the ball valve can be continuously effected without danger of damaging the lip by bending against a sharp opposing edge portion. The end baiiles 39 serve to direct the incoming liquid fuel around the ball valves 22 so as to prevent objectionable full direct impingement or” the incoming liquid fuel With the ball valves such as would cause chattering of the valves. The limited area cen tral openings provide just enough direct center contact cf the incoming liquid fuel with the ball valves 22 to avoid provision of objectionable low nular bumper seat portion engageable by the 3. In a valve, the combintaion of a ring seat of resilient yieldable material and a valve ball freely rollable in a generally horizontal direc tion into and out of engagement With -said ring seat for controlling passage of fluid therethrough, said seat including a ñrst engageable annular thin lip disposed transversely with respect to the axis of the ring seat and engageable- by the valve ball when moved against the ring seat and eiîective to provide an efficient seal at light ball valves against the inlet baffles. pressure contacts of the valve ball with the seat The partition or center baille 3l, proportioned ring, >a spaced second engageable annular bumper in the manner stated, covers the valve seat open seat portion engagea-ble by the valve ball and ings lû in a manner for diverting or guiding effective to provide an eñicient seal at heavier the incoming liquid fuel passing either ball valve pressure contacts of the valve ball With the seat 22 laterally and downwardly through the outlet ring and to limit the movement of the ball Within opening 5. In this manner, incoming fuel Will said lip and thereby assure against sticking of the not impinge upon the seated ball valve and tend , ball in the seat ring, and a rigid seat shoulder to unseat the same. While the center baille 3| disposed in cooperative relation to said bumper thus prevents the incoming liquid fuel passing seat for being engaged by said ball and pro viding a third engageable non-yielding seat one unseated ball valve from directly engaging (il) deñnitely limiting movement of the ball valve and eiîecting an unseating of the other seated ball valve, yet it does not obstruct the proper into the yieldable ring seat. and free flow of the incoming liquid fuel through 4. In a valve, a ring seat of rubber or equiva lent resilient yieldable material disposed with its the unseated ball valve associated seat to the axis in a generally horizontal position, a ball outlet opening 6. The shouldering of the ring valve, and means supporting and guiding the seat I4 in the manner clearly illustrated in ball for free movement along the axis of the Figure 5 for engaging under the undercut or seat ring for cooperation therewith, said ring overhanging shoulder l2 serves to support the having an annular thin lip disposed transversely thin flexible lip 2li against being deformed with respect to the axis of the ring seat and radially by ball contact or ring pressure. engageable by the ball and alone eiîective to form t is to be understood that the form of our an eiìcient seal when only slight gravitational invention herein shown and described is to be or other pull is exerted on the ball, and a spaced taken as a preferred example of the same and annular bumper seat portion engageable by the that various changes in the shape, size, and ball when greater than slight gravitational pulls arrangement of parts may be resorted to Without perssure areas at ¿l5 Which would tend to hold the :2,409,220 7 are exerted on the ball thereby to supplement the seal effected by said lip. 5. In a valve, a ring seat of rubber or equiva lent resilient yieldable material disposed with its . Y 8 the casing is provided with an annular recess disposed beside the flanged metal ring, and in which there is included a snap ring removably mounted in said annular recess and removably securing said metal ring in place in the ring seat axis in a generally horizontal position, a ball valve, and means supporting and guiding the ball for free movement along the axis of the receiving recess. seat ring for cooperation therewith, said ring having an annular thin lip disposed transversely formed of resilient material and having a plu rality of annular seat edges, said edges being of with respect to the axis of the ring seat and engageable by the ball and alone effective to form an eiiîcient seal when only slight gravita tional or other pull is exerted on the ball, and a spaced annular bumper seat portion engage able by the ball when greater than slight gravita tional pulls are exerted on the ball thereby to supplement the seal effected by said annular thin lip, said bumper seat portion being dis posed adjacent said lip so as to be engaged by l9. In a valve, the combination of a ring seat different diameters and flexible and resilient and one said edge being more flexible than the other, and a freely rolling ball valve rollable by gravity into and out of engagement with said ring seat and effective for engaging in seat sealing contact with the more flexible seat edge upon only‘slight gravity action rolling thereof toward said ring seat and with both said seat edgesA upon more pronounced gravity action rolling thereof toward said seat. the ball after a predetermined limited move 20 10. In a valve, the vcombination of a ring seat ment of the ball within said lip so as to assure formed of resilient material and having a plu against wedging of the ballA within said annular thin lip. rality of concentrically arranged and successively engageable first and second seat edges, said seat 6. In a valve, a casing having a cross wall hav edges being yieldable and resilient and said first ing a circular fluid passing opening therein and seat edge being more yieldable than said second a ring seat receiving recess, a ring seat of rubber seat edge, and a freely rolling ball valve rollable or equivalent yieldable material mounted in said by gravity into and out of engagement with said recess, a ball valve, means for guiding said ball ring seat and effective for engaging in seat sealing for movement along the axis of said opening contact with said l'irst seat edge upon only slight toward and from said ring seat, said seat having 30 gravity action rolling thereof toward said ring an annular thin lip extending transversely at said seat and with both said first and second seat edges opening and inwardly beyond the diametric limit upon more pronounced gravity action rolling of said opening and engageable by the ball and thereof toward said seat ring. alone effective to form an eñìcient seal upon light 11. In a valve, the combination of a casing pressure contacts of said ball, and a spaced an- structure having a flow passage therethrough sur nular bumper seat portion engageable by the ball rounded by a seating portion, a valve member upon heavier pressure contacts of the ball with movable between lpassage sealing and passage said seat, and a flanged metal ring for removably opening positions and including a seating portion retaining the seat in said recess, the ring ñange opposing the first mentioned seating portion, one being disposed in cooperative relation to said lip 40 said seating portion having a seating ring of and bumper seat for being engaged by the ball resilient yieldable material presented'for engage after it has successively engaged the lip and the ment with the other seating portion and including -bumper seat in the order stated and compressed a first engageable thin bendable annular lip effec the bumper seat a predetermined limited amount, tive to provide an efficient line Contact seal at thereby to positively limit the degree of deforma light pressure contacts of the ring with said other tion of the seat by the ball and prevent wedging seating portion, and said ring also including a of the ball in said lip. spaced second engageable annular yieldable 7. A structure as defined in claim 6 in which bumper seat engageable with said other seating the ring seat receiving recess is undercut so as portion after an amount of bending of said lip to provide a shoulder disposed to overhang a por 50 and effective to provide an eilicient seal at heavier tion of the seat from which the thin annular lip pressure contacts of the ring with said other seat extends and support the lip against inward dis ing portion. ~ ` tortion. JOSEPH F. MELICHAR. 8. A structure as defined in claim 6 in which WILTON MARGRAVE.