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Патент USA US2135351

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‘Nov. 1, 1938.
Filed Dec. 11, 1936
Patented Nov. 1, 1938
Charles H. Nehls, Detroit, Mich.
Application December 11, 1936, Serial No. 115,298'
2 Claims. (01. 70—165)
This invention relates to locking closures, and
especially concerns covers for tanks and other
5 ,
receptacles. An important aim of the invention
is to provide an improved locking cap, incor
porating mechanism of simple, ‘secure and
tamper-proof character rendering the entire cap
body, and all accessible portions thereof, freely
rotatable when the cap is locked, such rotatabil
ity preventing removal of the cap.
A further object is the provision of such a lock
ing cover, the working parts of which are effec
tively protected against the entrance of mois
ture, the danger of freezing and sticking of the
parts in cold weather being thereby obviated.
Another object of the invention is the provision
of such a cap adapted to be incorporated in a
design of especially neat and attractive appear—
ance. A further object is to provide in such a
locking cap a body portion carrying the lock so
arranged that when the cover is in place upon a
container, the body portion may be clutched and
released with respect to a concealed and inacces
sible closure portion extending into the opening
to be closed.
A further object is the provision of improved
and simpli?ed locking means for such caps, as
well as improvement of the means for rotatably
connecting the closure and cap portions.
Other objects and advantages will be apparent
from the following description wherein reference
3 O is made to the accompanying, drawing illustrat
ing a preferred embodiment of my invention,
and wherein similar reference numerals desig
nate similar parts throughout the several views.
In the drawing:
Figure 1 is a bottom view of a cap incorporat
ing the principles of this invention and suitable
for use as a tank cover or the like.
Figure 2 is a diametric cross-section thereof.
Figures 3 and 4 are horizontal sections taken
4 0 substantially on the lines 3—3 and 4—-4 respec
tively of Figure 2 and looking in the direction of
the arrows.
Figure 5 is a view in diametric cross-section
'- and partly broken away, taken substantially at
right angles to the plane of Figure 2.
Figure 6 is a perspective view of the closure
section, partly broken away and with the pivotal
attaching means removed but shown in position
ready for insertion.
Figure 7 is a perspective view of the interior of
the closure portion, one wall thereof being broken
away; and
Figure 8 is a perspective view of the interior of .
the cap portion, with the closure portion removed.
Referring now to the drawing, which shows an
embodiment of the invention especially suitable
for the ?ller openings of fuel tanks, such as
automobile petrol tanks and the like, reference
character I0 designates the body portion of the
cap, such body portion being shown as of more or
. less conventional belled external contour, cen
trally carrying an integrally cast downwardly
projecting barrel portion l2 which constitutes the
cylinder for the plug l5 of a tumbler-lock, and 10
also rotatably supports a cup-shaped closure
member 35, ?tted over the bottom of the barrel.
The plug is exposed at the top of the cap to
receive a key, in the conventional manner, but a
protecting key-hole cover I‘! pivoted to the top‘ of 15
the cap body and adapted to seat upon a ring
gasket 18 encircling the plug is provided to seal
the lock cylinder against the access of moisture
from the outside, and swingable laterally to afford
access to the key-hole. The key-hole cover is 20
shown pivotally attached to the cap body H] by
means of a downwardly projecting boss 59 ex
tending into the top of a bore (undesignated) in
the cylinder portion l2.. A pin or screw, as 2|,
carried by the boss, projects from the bottom of 25
the barrel through the counterbored lower end
32 of the bore and into the boss 19. In the
counterboredportion 32 and beneath the head of
the screw 2| a compression spring 23 encircling
the screw is trapped, such spring acting to hold 30
the key-hole cover I ‘l yieldably seated against the
gasket, which is somewhat depressed below the
remainder of the top of the cap body, to tend to
center the small swinging cover.
In the periphery of the barrel portion l2 near 35
its top a groove 26 is provided, and the closure
member is shown rotatably attached to the bar-,
rel by means of key elements 31 projected through
slots, as 38, inrthe sides of the closure and into
such groove 26 in the barrel. The body and bar
rel are preferably integrally cast, and the keys
may be provided with struck-up portions, as 39,
to increase the friction of their engagement with
the slotted portions of. the closure member.
When fully inserted, the extremities of the keys
project from the closure into the belled interior
of the cover, such projecting portions being perfo
rated to enable their removal by means of a
suitable tool, but only when the inside of the cap
is accessible.
From the ?at bottom surface of the barrel 2.
pair of guides 25 project downwardly in parallel
relation to form a slideway for the radially shift
able lock bolt or detent 30. The bolt may be
stamped of relatively heavy sheet metal, and its
shape and arrangement are best shown in Figures
3 and 8.
As there indicated, it carries an inte
gral pointed extremity 3| which is operative to
lock together the body and closure portions of
the cover and is provided‘with a back taper, for
The bolt
c a purpose which will presently appear.
is projectible laterally from the bottom of the
‘ barrel I2 to engage between detent teeth 50 car
ried by the body, from which teeth it may be
10 retracted, to free the body portion ,forlindepend
ent rotation, thus, preventing removal‘ iof;the cap.
The enlarged rear portion of the bolt is retained
cap body, and that the greater the effort exerted
upon the cap, the more ?rmly the bolt is pro
jected, accidental release oi the parts being t-hus
impossible, while when the bolt is retracted, its
point lies inside and free of the teeth 50, so that
the entire cap body and barrel may turn freely
with respect to the closure member 35, such posi
tion of the bolt correspending to the locked posi
tion of the cap.
Preferably the closurerportionaii? is so designed 10
'asg‘tor?tv deeply into theneck oropening of the
container to which the cap is applied, to such
between‘ the guides 25 and actuable by an eccen‘
extent, for example, as to seat the gasket 55
tric pin l6 projecting from the lower end of the , against the top of the neck or container, while
15 lock plug into a slot 32 in the bolt.
It Will: be
appreciated that when the lock plug-is rotated,
by means of a suitably bitted key, the boltor
the cap body extends down the outside of. the neck’ 15
,or lies-close. tor-the top of the container, making
the closure portion inaccessible, and, by reason
detent may be reciprocated to project and retract , ofthe free rotatabil-ityof the cap body when the
the same.
The inwardly projecting detent teeth 50 car—
ried:by the cupped’closure memberv 35ware ‘also
integrally cast in place; and ‘arranged; at thev 1111'
side, bottom corner of the cup‘, as best shown in
Figure 7. Each tooth has-parallel ‘sides, impart;
ing" an outward taper to the space between any
two thereof. As shown in Figure 3,“ such outward
taper cooperates with the, back taper‘ of bolt por- ,
device isllocked, irremovable save by the use of a
proper key. ,
What I claim is:‘
1.‘ A locking cover construction comprising a
cuppedclcsure member, a body member rotata~
bly. connected to the closure member, locking
meanscarriedby and rotatable with the body 25'
member, including; a, detent movable into'and
out of a position in detainingengagement with
tion 3] in such fashion that. torque applied to the ‘both-of said members, said, bodyimeinber having
cap body tends, by forcing fthe‘sides of the bolt a portion rotatably extending into the cupped
and adjacent tooth together (when the bolt- is closure, member, said: detent being slidably 305
projected), to urge the bolt-outwardly, thus in
mounted between the bottom of said LPOI'tlOI‘l and
suring, its maintenance in projectedposition.
the bottom of the closure member, inside the
From the outer surface of the closure member latter and outside the former, cooperating abut;
near the bottom, ‘extend holding lug portions 4|, _ment, portions between which the-‘detent is slida
which constitute the projecting. ends of‘a trans‘ ble, carried both by said'body portion which pro
versely disposed sheet. metal strip 40, centrally jects into the cupped closure member and by the
carried by the closurenear thebottom thereof and, cupped closure member, said detent being mova
housed in an under-cut slot 42. in the bottom of_
such closure member, the slot being'closed and
the’ lug strip held in place
a conform-ably
' shapedslide 43 ?tted‘into the slot from one end.‘
The lug portions 41 are adapted to~cooperate
with bayonet-type locking portions (unshown)
carried atrthe neck .or opening-of the receptacle
to which the cover, is-to bergattached, although it
will be appreciated. that,‘ screw-type or other
suitable holding portions might, be provided.
The lug strip 40' also may act as'a spring'to ihold
slide 43 in place, a central boss, as M, struck up
5053 slightly from the surface of‘ the- strip 40‘ for
ble to and from bridging relation with the abut
ment portions to. connectland’ disconnect the body
and closure members, external lug-forming \ 40
means comprising a transverse member’ carried
by and'projecting- at its: ends from the closure
member, said transverse-member also being ‘ar
ranged at least partly between said closure meme
her and said portioniof the body. member which
tween saiddetent
urging one against
other against the
and. a spring arranged be
and’ transverse member for,
said‘ body member and ‘the
closure 'member, and also
urging said body and ‘closure members longitudi 50
engagement with'an appropriately arrangedde- V nally with relation to each other;
pression (undesignated) in the slide, acting as a
positive lock to retain the slide, as well as to ‘pro
vide a centering pocket uponthe other side of
-‘.-j:the» strip for the apex of an inverted conical
, spring 45trappedin an opening», as 46, ingthe
bottom of the’ closure member,’ The opening’
connects slide-way 42' with the interior, and a
'cup-ped spring retainer, slidably ?tted. in such
60 opening, covers the base of the spring vand bears
upwardly againstv the bol-tBIl, holding the parts
against rattling and serving as a slide for; the bolt.
It will also be seen that when the bolt is pro
jected, the closure member, ,35-and bayonet look
65 ing portions 40- may be turned as a unit with the
2. In a lockable container closure of- the type
having an external belied body freely rotatable
when the" closure is locked, a-cupped closure ele
ment rotatably attached to the-body,~said body 55
having a portion rotatably ?tted‘into the closure
element, said closure element having a substan
tially cylindrical wall and an outwardly extending
thickened abutmentportion at its top, within the
belled-body, forming a shoulder adapted to act 60
as an abutment for- sealing means, and keying "
meansialso extendingthrough said thickened por
tion to rotatably join the cuppedclosure portion
to saidinter?tted portion ofthe body. '
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