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Патент USA US2137999

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Nov. 29, 1938.
D. w. cuéns
v
r' 2,137,999
SEALIISG CAP FOR BARREL BUSHING AND. SCREW PLUG ASSEMBLIES
Filed July 6, 1936 v
2 Sheets-Sheet 1
1
3/5
/Z /5
/
INVENTOR;
/ATTORNEY.
Nov. 29, 1938.
D. w‘ cum-1s
2,137,999
SEALING CAP FOR BARREL BUSHING AND SCREW P‘LUG ASSEMBL-LES
Filed July 6, 1936
2 Sheets-Sheet 2
/7
o
ti
ATTORNEY.
Patented Nov. 29, 1938
I 2,137,999
PATENT OFFICE
UNITED STATES
2,137,999
SEALING CAP FOR BARREL BUSHING AND
SCREW PLUG ASSEMBLIES
David W. Curtis, St. Louis, Mo., assignor to
Thomas Connors, St. Louis, Mo.
Application July 6, 1936, Serial No. 89,160
7 Claims.
(Cl. 220—39)
This invention relates, in general, to metallic
barrels, and like containers ?tted for the storage
and transportation of oils, or other liquids, and
semi-liquids, and, it has particular reference to
C21 means for sealing the outer end of a closure bush
ing having a ?lling and/or discharge opening
and provided with a closure plug.
The object of my invention is the provision of
means comprising a snap-on sealing cap for
10 disposition over a barrel bushing and plug there
to spread the free ends of the skirt ?ngers.
Fig. 5 is a fragmentary bottom plan view of a
sealing cap with the gripping skirt ?ngers ex 10
panded and the sleeve portions thereof in sec
and, which will automatically lock itself to the
tional elevation to show one form of split circular
?exibly resilient locking member carried thereby
of from the bushing, unless forced, and, in such
15 instance be readily detectable.
V
A further object of the invention resides in a
sealing cap structure having a ?exibly resilient
central disc portion bulged to the lower side of
a plane when the cap is open, and yieldable, un
der pressure, said cap having skirt means gripped
to the barrel bushing when the central disc por
tion is bulged to the upper side of the plane and
said skirt means beingprovided with a spring
wire, one end of which is anchored to a section
of the skirt means and the other end free so that
when the skirt means is contracted the free end
of the spring wire will lock against an adjacent
portion of the skirt means and thereby prevent
expansion of the sealing cap skirt or its removal
30 from a barrel bushing without the use of tools
to dis?gure the sealing cap.
Therefore, an object of the invention is the
provision of a snap-on sealing cap, which can
be applied to a barrel bushing without the use
35 of tools of any kind, and when once positioned,
cannot be removed without dis?guring portions
of the cap with some kind of a tool which renders
the cap readily detectable as having been tam
pered with.
'
A still further object of the invention is the
provision of a sealing cap for barrel bushing and
screw plug assembly, which possesses advantages
in points of simplicity and efficiency, and, at the
same time proves itself comparatively inexpen
45 sive in cost of manufacture.
With the above and other objects in view,
which will be apparent hereinafter, the invention
40
consists in the novel features of construction, ar- '
rangement and combination of parts hereinafter
more fully described and ?nally pointed out in
the claims hereto appended.
Referring to the accompanying drawings form
ing a part of this speci?cation, wherein like char
acters of reference denote similar parts through
5
99
ing the top portion thereof bulged downwardly
for without the use of any tools, or machines,
bushing in a manner as to prevent removal there
2
Fig. 2 is a top plan view of the invention, with
a portion of the sealing cap top broken away.
Fig. 3 is a side elevation of the sealing cap
mounted to cover the barrel bushing, bead and
Cl
screw plug carried by the bushing.
Fig. 4 is a sectional view of the sealing cap show
in its unlocked or expanded position.
Fig. 6 is a view similar to Fig. 5, but showing 15
the skirt ?ngers in closed position and the free
end of the locking member as in locked engage
ment with one end of one of the skirt ?ngers
sleeves to prevent the skirt ?ngers from spread
ing.
Fig. 7 is a top plan view of the split circular
?exible resilient locking member.
Referring, now, to the drawings, a wall of a
metallic container, or a barrel head I is shown
provided with an opening, and, to which is se
cured a suitable bushing, one type of which struc
ture is clearly de?ned in my co-pending appli
cation, Serial Number 82,598, and, consists, brief
ly, of an internally screw threaded bushing mem
ber 2 having an annular ?ange 3 projecting
downwardly from the inner lower edge thereof.
and crimped to a horizontal ?ange 4 projecting
inwardly from a neck 5 which projects outwardly
from the barrel head I. The bushing member 2
is shown as being provided at any desired posi
tion on its outer peripheral face, with a suit
able annular groove or recess 6 below a bead 1,
and the bushing is also shown as provided with a
suitable nut 8 provided with suitable wrench
engaging means carried by the internal screw 40
threads of the bushing and serving as a closure
for the ?lling and/or discharge opening.
The sealing cap, or closure member for dis
position over'the barrel bushing and the screw
plug therefor will now be described. _
The sealing cap is shown as comprising a cen
tral ?exibly resilient disc portion 9 normally
bulged to one side of a plane and from the edge
portion thereof, there is a skirt portion consist
ing of a series of gripping ?ngers l0 formed by
slitting the cap material, as at H.
The lower edges 'of skirt ?ngers ill are curved
inwardly to provide sleeves I2 for a suitable split
circular ?exibly resilient locking member !3, such,
for instance, as a spring Wire or band to pass 55
out the several views:
Fig. 1 is a sectional view of barrel bushing,
screw plug and sealing cap assembly embodying
the features of my invention, the sealing cap be
through. One end of the locking member I3 is
suitably anchored, as at I4, to the sleeve portion
ing shown in closed and locked position.
so that when the central disc portion of the seal
of one of the skirt ?ngers l0 and the opposite end
of the member I 3 is free to move circumferentially
‘2
‘
-
2,137,999
ing cap is bulged upwardly beyond a plane the
skirt ?ngers Ill at their free ends will move in
wardly toward the center of the sealing cap,
thereby reducing the diameter of the locking
Cl
member l3 and the mouth of the sealing cap. In
so doing, the free end of the locking member l3
will slide out of one end of the sleeve portion I2
of a skirt ?nger l0 adjacent or next to the skirt
?nger H] to which the opposite end of the locking
10 member I 3 is anchored, and, as the free end of the
locking member l3 moves out of the end of the
sleeve portion of said skirt ?nger the hooked end
l5 thereof engages the end I 6 of the sleeve to lock
the snap-on sealing cap in position on the bushing
over the plug therein. When thus locked in posi
tion, over the end of the bushing, it cannot bere
moved without dis?guring the ?ngers with a tool
of some kind, and, in such an instance, it can
be readily detected that the sealing cap has been
20
tampered with.
The sealing cap is applied to the bushing after
the central disc portion 9 of the cap is bulged
downwardly, which spreads or expands the free
ends of the skirt ?ngers IE! to increase the size of
the mouth of the cap to a diameter to slip over the
bead ‘I on the bushing. Now, so positioned, to
close the skirt ?ngers H] around the bushing and
bead, one merely applies ?nger pressure to the
skirt ?ngers and the sleeve portions of the skirt
30 ?ngers will snap into engagement with the groove
6 on the outer bushing wall, thereby locking the
cap in position over the bushing, bead and screw
plug. This closing function of ‘the cap draws the
edge portion of the central disc portion of the
35 sealing cap down tightly against a suitable gasket
ll disposed between the cap disc portion and the
outer end face of bushing adjacent the bushing
bead, and effects a leak proof joint therebetween.
The sealing cap can be snapped into'locked
40 position on the‘bushing,.but it cannot be removed
' without tools to dis?gure the skirt ?ngers.
From the foregoing description, it is apparent
that the snap-on sealing cap can be used in con
nection with barrel head or body bushings of
45 other design than that disclosed herein, or in my
co-pending application as long as the bushing is
provided with a bushing bead and groove or re
cess therebelow to accommodate the inwardly
curved or inwardly turned free ends of the sealing
50 cap skirt ?ngers, and when of the latter type the
bushing plug has a portion to prevent the down
ward bulging of the central portion of the cap
when it is once applied to the bushing.
The spring wire locking means in the ?rst
55 described form of the invention prevents the cen
tral disc portion of the sealing cap from being
bulged downwardly and removed from the bush
ing when once applied thereto and the plug por
tion in the modi?ed form of the invention pre~
vents the central disc portion of the sealing cap
from being bulged downwardly and removed from
the bushing when once applied thereto.
The many advantages of the herein described
invention will readily suggest themselves to those
65 skilled in' the art to which it appertains.
From the foregoing description, it is evident
that a simple device for this purpose has been dis
closed, but it is to‘ be understood that I do not
desire to restrict, or limit myself to the very de
tails of the construction shown and described,
which is merely illustrative, it being obvious that
changes, not involving the exercise of invention,
may be made without con?icting or departing
from the spirit of the invention within the scope
75 of the appended claims.
What I claim is:
1. The combination with a metal barrel ?tted
witha bushing having a peripheral-bead and pro
vided with a screw plug, of a snap~on sealing cap
therefor having a series of contractible skirt ?n
gers to engage the bushing below the bead and
circumferentially contractible means engaging
the inner walls of the ?ngers for locking the cap
in position.
»2. A sealing cap of the class described compris 10
ing a ?exibly resilient body portion, a series of
expandible and contractible skirt ?ngers, and
circumferentially contractible means connected
to the inner surface of the skirt ?ngers to lock
the skirt ?ngers in contracted position.
15
3. A sealing cap of the class described compris
ing a ?exibly resilient body portion, a series of
expandible and contractible skirt ?ngers, ‘the
lower ends of the skirt ?ngers being rolled in
wardly, a split ?exibly resilient wire ring secured 20
at one end to one of the skirt ?ngers and mounted
in the rolled lower ends of the other ?ngers, a
hook formed at the opposite end of the split ring
adapted for engagement with one of the side edges
of the rolled lower ends of the skirt ?nger ad
jacent the ?nger to which the ring is secured'for
locking the skirt ?ngers in contracted position.
4:. In combination with a container plug bush
ing having an exterior circumferential groove, of
a sealing cap adapted to be snapped into locked
position on the bushing, said cap comprising a
?exible resilient body portion and a series of ex—
pandible and contractible skirt ?ngers which
when in their expanded position permit the cap
to be mounted on the bushing, the lower edges
of the skirt ?ngers being directed inwardly, and
circumferentially expandible and contractible
means carried by the skirt ?ngers on their inner
faces thereof for locking the skirt ?ngers in their
contracted position with vthe inwardly directed Ad
ing groove.
lower ends of the skirt ?ngers seated'in the bush- " '
5. In combination with a snap-on sealing cap
having a ?exibly resilient ‘body portion and a
series of expandible and contractible skirt ?n
gers, of circumferentially expandible and con
tractible means'connected ‘to the inner faces of
the skirt ?ngers adjacent the lower ends thereof
to lock the skirt ?ngers in contracted position.
6. The combination with a metal barrel ?tted
with a bushing and ascrewplug therefor, of a seal
ing cap adapted to be snapped into position over
the bushing and screw plug, said cap including a.
series of expandible and contractible skirt ?n
gers, and circumferentially contractible means
connected to the inner surface of the ?ngers ‘to
lock the ?ngers in contracted position for locking
the cap against removal on the bushing without
dis?guring the cap.
'7. In a structure of theclass described, a con
tainer ?tted with a bushing secured at its lower
end to the container, said bushing-having an outer
550
60
peripheral head by grooving the bushing, a plug
carried by the bushing, a sealing cap snapped into
position and covering the outer end of the bush
65
ing and the plug, the cap including a series of
expandible and contractible skirt ?ngers with the
free lower edges thereof engageable in the bushing
groove when a central disc portion of the cap is
bulged upwardly, and circumferentially contracti
ble means connected on the inner surface of the
?ngers to lock the ?ngers in contracted posi
tion and to prevent the central disc portion of the
cap being bulged downwardly.
'
DAVID W. CURTIS.
70
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