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Sept. 24, 1946.-
Filed Dec. 21, 1943
Patented Sept. 24, 1946
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) '
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.
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
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.
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
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
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
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.
3. A closure device, comprising a rotatable
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
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
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
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