Sept. 24, 1946.- 5. H. SIMITH ._ S CREW- THREADED CLOSURE DEVICE‘ Filed Dec. 21, 1943 2,408,233 Patented Sept. 24, 1946 2,408,233 uni-Tao 5mm PATENT OFFICE ’ I 2,403,233 1 . SCREW-THREADED CLOSURE DEVICE SydneyfHartley-Smith, Manchester, England,v as si'gnor- to Imperial Chemical Industries Limited, a corporation of Great Britain . Application December 21, 1943, Serial No- 515,104 ‘ In Great Britain November 13,1942‘ 4: Claims. (01. 220-39) ' 1 r , l v, 2 der 6, the said shoulder, providing‘ an abutment This invention relates to ?ller caps or‘ closure devices for; fuel tanksyand other containers and for an outwardly extending ?ange 1 on‘ the said peg. The said ?ange is vurged against the said more particularly to meansadapted' to‘ ‘facilitate rotation of the said-devices for-attachment to'or detachment from a container" or the like, said ; , shoulder by means of a spring 8. The'neck por tion 4 of the said bore is’ provided with dia- ' means consisting" of, two' or‘ morejpegsor- like projections on the outer surface or head of the metrically opposed longitudinal slots’ 9 which extend the fulldepth of the said neck portion. responding screw‘thread in’ the‘ container‘ ori?ce pins being adapted to ride clear of‘ the said'slots when the peg is fully depressed, thuspermitting rotation thereof in the‘bayonet-‘joint connection Lateral retaining projections f0, such-asba'yonet. closuremem'ber for’enga'gem-ent with av tommy pins or arms, protrude outwardly .from'th‘e peg’ 2 bar ‘or other turning 1ever.. The said closure devices maybe screw-threaded to engage‘ a cor;-’ 510 and engagein the said longitudinal slots, the said or may beadaptedto be attachede'to and detached frornf the‘ container by. any other ‘means embody~ ing'rotational‘ or semi-rotational movement. According to the'present invention- in a closure —'_ device of the‘kind' referred to- the pegs are adapted to be depressed orl’owered and retained within thus constituted and the engagement of the said _ pins with the shoulder 6 by which means; the said peg is retained withinjthe closure, as shown in Figs. 2 and‘l- The outer‘ end of the peg is suitably recesses formed in the body of theclosure' merh- ~ formed, in this instance through provision‘ of her in‘ such manner‘ that when not in ' use" for’ ro tational movement of'the closure, the said pegs ,. by a suitable tool when so’ depressed. The coiled are disposed substantially flush. with‘ the surface of" the closure. ‘ . y In the bestembodimentiof‘the invention, two diametrically opposed spring-loaded‘ pegs are kerf 2b, to facilitate- its being rotated or turned ' spring 8 is located and compressed between-the peg and the-‘disk H or the like. secured irrthe base of the closure. To this end, the peg may be shaped-like a thimble, asshown, to provide slidably mounted for" limited longitudinal move v25 a recess 20 in its base adapted and arranged to ment' in bores provided in. the head, of a closure ' cooperate with stud. Ha, which projects. from disk II, in suitably con?ning spring 8. and are adapted’ to. be depressed, into the. said In order to ‘bring the pegs 2, 211, into position bores andv retained therein when required‘ by a for. levering engagement by a tommy-bar' for bayonet type joint. _ . The aforesaid embodiment of‘the invention is .- 3.0 Figure‘ 1 is’aperspective view of a closure device constructed. in accordancewith the'present in vention. screwing down or'unscrewing the closure device, each peg is rotated or turned. as by suitablyen gaging thescrew-driver end 3a of the" tommy bar of the kerf 2b,.until'. the bayonetpins' or arms illustrated'sin’the' accompanying drawing in ‘which t0 register withthe slots 9‘, whereupon the spring ‘ Figure 2 is a; perspective“ view'of aportion' of ~ '» 8 instantly urges the. peg longitudinally through the neck portion. 4, ofthe recess or bore into the the closure illustratedin" Figure 1‘ showing. one peg depressed and retainedwithin the ‘closure. Figure 3 is a sectional view on the line A-l-‘A of Figure 1. . Figure 4 is. a part-sectional view on the’ line 40 B—B of Figure’ 2. _ . a a r . position shown Figs. 1 and 3, this movement being arrested when the .peg has. attained its proper elevated. era-protruding position ‘by the engagement of flange. 1 with shoulder 6‘, which elements. together constitute stop means; Referringtdthe. drawing a closure ‘member I; .It'will. be. seen. from Fig. 3 of the drawing that in the form' of a plug having an externally screw threaded portion la and a head flange lb which the arms' Hi’o‘f each peg are so spaced from the ?ange ‘l, and the shoulder B is at such a distance limits the inward travel of the plug, is provided with two diametrically opposed spring-loaded pegs 2, 2a adapted to be engaged simultaneously 45 belowthe outer face of the closure device, that said arms cannot pass upward out of their re spective slots butrstill remain in contact with the walls thereof when the peg projects to its by a levering tool such as tommy-bar 3 (shown fully elevated or protruding position above said in chain-dotted lines in Fig. 1) to facilitate rota tion of the said closure, said tool having in this 51; outer face for engagement by a levering bar or tool. It will be further noted that the slots 9, of instance a ?attened or screw-driver end 3a for the pair of spaced recesses housing the cooperat a purpose hereinafter pointed out. Each of the ing pair of pegs extend in the same direction andv said pegs is slidably mounted in a cylindrical re are substantially in alignment transversely of the cess or bore comprising a neck portion 4 leading into an enlarged portion 5 thus forming a shoul ac closure. By reason of this construction and ar 2,408,233 3 rangement, said arms l0 assist in distributing the stresses on the pegs, due to the levering action of the tommy-bar, to the walls of the slots, there by reducing the danger of bending the protrud ing portions of the pegs or of unduly compressing the edges of the respective recesses or bores. The most advantageous arrangement is one wherein, as in the speci?c construction shown, the longi 4 about its longitudinal axis in depressed position, each peg being provided with a stop member ar ranged to engage the shoulder of its bore and thereby limit the outward movement of the peg, and with a pair of diametrically opposite arms which extend laterally from the peg and are adapted and arranged to slide in the slots afore said and to pass out of said slots into the en larged portion of the bore for retaining engage of the closure device, to which plane all the slot 10 ment with the shoulder when the peg, in its de pressed position, is rotated about its longitudinal walls are parallel and closely adjacent. axis; the arms and the stop member being so The invention has particular application to located and spaced apart in the direction of the ?ller caps of fuel tanks for aircraft which are longitudinal axis of the peg that, when the stop required to be flush ?tting with the exposed sur tudinal axes of thepegs lie in a diametral plane device is in contact with the shoulder the upper face of the aircraft wing or fuselage where under end of the peg is above the outer face of the flight conditions a smooth ?ush surface is re closure body sufficiently to be engaged by a quired and where for ?lling purposes the ?ller tommy-bar and the arms are still within the cap is required to be unscrewed in an easy and slots; and resilient means for each peg tending rapid manner. In such circumstances the closure device may 20 to bring its stop-device in contact with the shoul conveniently embody a quick-pitch or multi-start der of its bore. , r 3. A closure device, comprising a rotatable screw-thread. body portion having therein two bores,‘ each I claim: closed at its inner end and open at its outer end, 1. A closure device which comprises a rotatable closure body provided with a pair of spaced re 25 each bore comprising a cylindrical porti0n.of enlarged diameter near its inner end and a cylin cesses opening outward, each shouldered to pro drical neck portion of smaller diameter at its vide a neck portion and an enlarged inner por outer end, to provide an internal shoulder, the tion with a closed base, a peg slidably mounted neck portion having two slots opening into the in each recess for movement between elevated and depressed positions and rotatable in de 30 enlarged portion of thebore and all the slots of the two recesses extending in the direction of pressed position, said peg being provided with lateral projections working in longitudinal slots ‘ a straight line passing through the diameters of both of the bores, a pair of pegs longitudinally in the wall of said neck portion and opening into movable in the respective bores between elevated said enlarged portion, said slots extending in the direction of a straight line passing through both 35 and depressed positions, each having provision by which it may be rotated about its longitudinal of said recesses, said projections being arranged axis when in depressed position, each peg being to ride clear of said slots when the peg is fully thimble-shaped to provide a recess at its lower depressed and, by then rotating the peg, to be end, and having a ?ange arranged to engage the moved under the shoulder of said recess for re shoulder of its here to limit the outward move taining engagement therewith, a spring com 40 ment of the peg, and a pair of diametrically op pressed between said peg and the base of the posite arms which extend laterally from the peg recess, and means projecting laterally from said and are adapted and arranged to slide in the peg adapted and arranged, when said lateral pro— respective slots of its bore and to pass out of said jections are engaged in said slots, to stop‘ out D slots into the enlarged portion of the bore for ward movement of the peg by engagement with . retaining engagement with the shoulder when the said shoulder, when the peg has been urged out~ peg, in its inward position, is rotated on its lon wardly to project a substantial distance beyond _ gitudinal axis; the arms and the flange being so said head. located and spaced apart in the-direction of the 2. A closure device, comprising a closure body longitudinal axis of the peg that, when the ?ange 50 having two bores, each closed at its inner end of the peg is in contact with the shoulder, the and open at its outer end, each bore comprising upper end of the peg is above the outer face of a cylindrical portion of enlarged diameter near the body portion sufficiently for engagement by its inner end and a cylindrical neck portion of a tommy-bar, while the arms are still within the smaller diameter at its outer end, to provide an slots; a stud projecting’ outward from the bottom 55 internal shoulder, the neck portion having two of each bore, and a coiled compression spring slots opening into the enlarged portion of the con?ned by said studland the wall of the recess bore at the shoulder, and all the slots of the two in the peg. bores extending in the direction of a straight 4. A closure device as claimed in claim 1 where— line passing through the diameters of both of in the outer end of each peg is formed to facili said bores, a pair of pegs longitudinally movable 60 tate rotation thereof by'an engaging tool when in depressed position, in the respective bores between elevated and de pressed positions and each adapted to be rotated SYDNEY H. SMITH.