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Патент USA US2116170

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May 3,11938-
p. s. HALL
1 2,116,170
Filed July 17, 1936
3 ,4, KP. W80“;
Patented May 3, 1938
LID FOR, reassess assrs'rmo VESSELS
’ Cecil Stuart Hall, London, England, assignor to
Refrigeration Patents Limited, a corporation
of Great Britain
Application July 17, 1936, Serial No. 91,209
In Great Britain July 30, 1935
4 Claims.
ment in or modi?cation of the sealing device re
sisting vessels in which ?uids are stored or gen
ferred to in the preceding paragraph.
According, to the present invention, means are
provided for preventing rotation of the lid rela
erated under pressure and in ‘particular to lids
for pressure resisting vessels of the type in which
5, the sealing of the lid is assisted by the pressure
within the vessel, such as that described in U.‘ S.
Patent No. 1,932,135. vThese lids are intended
forms with pressure resisting vessels adapted for
the liquefaction or gasi?cation of solid carbon
in‘a member attached thereto, and of just suffi
cient width to accommodate the projection or 10
projections, the arrangement being such that
a soft gasket arranged in contact with the outer
when the projection and recess do not register,
the projection rides on the underside of the fol,
rim of the lid, with the wall of the pressure re
lowing ring or on a ledge attached theretoor on
the underside of the member attached to the fol- 15
lowing ring, and thereby keeps the lid out of con
and in the mouth of the pressure resisting ves
tact with the gasket. ‘ The prevention of rotation
sel by partial rotation, so that segmental projec—
of the lid relative to the mouth of the vessel may
be e?ected by rigidly attaching one or more pro
jections to the lid or to the stud which is ?xed
ring bear against corresponding projections in the
20 mouth of the vessel, thus preventing outward
to the centre of the lid, each of these projec
movement of the ring. The rim of the lid is
then brought tightly to bear on the gasket by
means of a stud, which is secured to the‘ centre
of the lid, the said stud carrying at its outer
tions fitting into a recess in the mouth of the
end a nut or handle which can be screwed down
on an intermediate cross piece or other support
exist between the segmental projections in the
mouth of the vessel for holding the following ring
in place against outward movement.
The accompanying drawing shows isometric
sectional views of the device applied to a pres- 30
ing member which is incapable of substantial
inward movement.
In sealing devices of the type described, if the
. following ring is rotated to the unlocked position
While there is any considerable pressure existing
in the vessel, there is the risk that, instead of
the sealing joint being broken to allow of escape
35 of gas, the entire sealing device, comprising lid,
gasket and following ring, may be ejected forcibly
from the mouth of the vessel.
Furthermore, in
the operationof making the sealing joint after
the vessel has, for example, been charged with
40 solid carbon dioxide, any rapid gas evolution may
cause the lid to rise into sealing engagement with
the gasket before the following ring has been
locked into position and some difficulty may be
experienced in inserting the sealing device into
the correct locking position.
In U. S. Patent No. 1,966,851 a sealing device
is described in which means are provided for
raising and lowering the lid in relation to the
mouth of the vessel and the following ring, and
50 also means are provided for simultaneously pre
venting rotation of the following ring except
when the lid is lowered and is out of sealing con
tact with the following ring and gasket.
tions adapted to engage in a corresponding num
ber of recesses formed in the following ring, or
in which a vessel is sealed by means of a lid and
tions on the outer circumferential surface of the
tive to the mouth of the vessel, and the lid or .
a member ?xed thereto has one or more projec
‘ In‘ the said patent a construction is described
15 sistingivessel ‘and‘with a‘ following ring of metal.
This latter is adapted to be locked in position
(Cl. 220-57)
. This invention relates to lids for pressure re
The present invention represents an improve
vessel which permits only of a vertical movement
of the lid without any rotation. For this pur
pose it is convenient to utilize the recesses which 25
sure vessel. Figure 1 shows the device in the po
sition when the vessel is sealed, and Figure 2
shows the position of the parts when the sealing
device is in the mouth of the vessel, but gas is
allowed to escape past the lid.
The lid 2 is provided with a stop H on its upper
side and this ?ts into a recess in a projection
I2 on the following ring 3 when the latter is
locked in the mouth of the vessel. The lid 2
has also a lip ll located in the'recess l? between 40
projections B so as to prevent rotation.
In order to remove the sealing device‘ from the
mouth of the vessel, the handle 1 bearing against
the rigid crossbar 6 is rotated in an anti-clock
wise direction so that the lid 2 is lowered by 45
means of the member 5, so that the projection
I3 slides downwardly out of the recess in the
projection l2 on the following ring 3. The- lid
2 is now out of contact with the gasket 4 and gas
may escape from the vessel and any pressure 50
above atmospheric is relieved. The ring 3 is now
partly rotated in a counter-clockwise direction
by means of the handle 8 until the projections M
are no longer under the corresponding projection
9 in the mouth of the vessel. The members are 55
now in the position shown in Figure 2, and the
whole sealing device may be lifted out of the
The placing of the sealing device into position
and the completing of the sealing of the vessel
by bringing the lid 2 into contact with the gasket
4 is precisely the reverse operation of the method
of removal above described. The total extent
of the downward movement of the stud 5 is such
10 that the projection I3 is just able to emerge
from the recess l3a, and the rotational movement
of the following ring 3 is limited by the projec
tion I3 engaging stops l2a at the extremities of
the ledge 12, thus permitting just the right
15 amount of rotation to bring the projections 14
and 9 into register.
I claim:—
1. A sealing device for a pressure vessel hav
ing a cylindrical opening with an inner circum
20 ferential recess near its outer end and longitudi
nal recesses extending from its mouth to the said
circumferential recess; a removable ring of eX
ternal diameter equal to the diameter of the
opening and provided with projections corre
25 sponding to the said longitudinal recesses so that
by partial rotation of the ring
ing, the said projections enter
tial recess and lock the ring
movement; a lid and a gasket
Within the open
the circumferen
against outward
adapted to form
30 a ?uid-tight seal with the mouth of the vessel
and with the side of the ring furthest within the
vessel; means for preventing relative rotation
between the lid and the mouth of the vessel; at
least one projection or recess on the lid and at
least one recess or projection on the ring adapted
to engage with each other, their relative size
and positions being chosen so that their engage
ment is only possible when the ring is in the
locked position and prevents relative rotation
between the ring and the lid and their non-en
gagement prevents fluid-tight contact between
the lid and the gasket; and means for drawing
the lid towards the ring so as to compress the
gasket into ?uid-tight contact with the wall of
the vessel and with the ring and the lid.
2. A sealing device as set forth in; claim 1, in
which the means for preventing rotation of the
lid relative to the mouth of the vessel comprise
at least one projection rigidly attached to the
lid, and registering in a recess formed in the 15
mouth of the vessel, said recess permitting only
of vertical movement of the lid without any rota
3. A sealing device as set forth in claim 1, in
which the means for preventing rotation of the 20
lid relative to the mouth of the vessel comprise
at least one projection rigidly attached to the lid
which engages a longitudinal recess in the mouth
of the vessel serving for the introduction and
locking of the ring.
4. A sealing device as set forth in claim 1, in
which the means for drawing the lid towards the
ring comprise a vertical threaded stud attached
to the lid, a cross piece adapted to engage the
upper portion of the mouth of the vessel, means 30
engaging the stud and the cross piece and adapted
upon being rotated to draw the lid towards the
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