close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2406708

код для вставки
Aug. 27, 1946;
v
F. J. PEPERSACK,
2,406,708
ACCESS DOOR FITTING ‘FOR TANKS
Filed Aug. 15, 1942
3 Sheets-Sheet 1
fkaxvcllaJ/vzpéwsaur,
Aug. 27,1946.
F. J. PEPERSACK
‘ 12,406,703
‘ ACCESS DOOR FITTING FOR TANKS
'
Filed Aug. 15, 1942
3 Sheets-Sheet '2
gihHw-W:
W
_
’
W
N
y
I
\
l
L
fkA/VOGJPEPéR-SHC/f,
.
Aué- 27, 1946.
F. J. PEPERSACK ' ‘
ACCFiSS DQOR_FITTING FOR TANKS
Filed Aug. ‘15, 1942
2,406,708
3 Sheets-Sheet 3
, ,,
A
.
m.
@w
a
r7? Z» WM
m.
w
13M1
M
W
Patented Aug. 27, 1946
2,406,708
'e
UNITED STATESaide-hos
I PATENT OFFICE
ACCESS noon FITTING FOR TANKS’
Francis J. Pepersack, Towson,‘Md.,' assignor to
The Glenn L. Martin Company, Middle River,
Md., a corporation of Maryland
'
‘if Application August '15, 1942, Serial Nqii'ssess
'
5 Claims.
(01. 1'5o_3)
2
The invention to be described pertains to ‘ac; v ' thetank'cell on the rigid housing structure and
assist in the assembly of the access door.
'cess door ?ttings for vtanksjarid particularly for
' 'Still other features of novelty contributing to
tanks adapted to contain liquid hydrocarbons,
and comprising a rubber-like cell' con?ned by a
' the, ‘e?iciency and simplicity of the fitting con
struction of this invention, will be pointed out
rigid housing structure. Tanks of thisinature -5 in
connection with the following detailed descrip
are used as fuel ‘and oil tanks forairplanes. 5 .
a
tion of severai illustrative embodiments taken in
They are ?tted into the different parts ‘of the
connection with the accompanying drawings, in
fuselage or Wings so' that the normal structure
provides the rigid housing element of the tank.
An illustration of this practice is found in Gray 10 i Fig. 1 shows a fragmentary plan view of an
access door ?tting for a: circular tank opening,
et a1. PatentiNd 2,102,590 disclosing a cellular
the view being partly broken away to show cer
"form of tankapplied to aircraft construction.’
taindetails in section; ,, 1 ' I
_
However, this cellular form of tank is also ap
Fig; 2 is a fragmentary plan view of a clamp
plicableto other kinds of transport vehicles such '
as ships,’ motor trucks, and freight cars.
15 ing member of the ?tting;
which
, The general purpose of this invention is to
'
‘
.
' '. Fig. 3; is a vertical transversesection to reduced
‘provide a cellular tank of the type indicated with
a relatively large ‘access door or closur'e'which
scale taken along the line ‘III-III of Fig. 1;
‘Fig. 4 isv a ,_ similar vertical transverse section
taken‘ along the linejI_V—-IV of Fig. 1;
vwill facilitate manufacture of the. tank cell and
51s a transverse vertical section similar
itsassembly, in a housing structure, and also 52,0 to‘Fig. 4m
mostrespects, but‘ showing a different
afford access to the entire interior of the cell, as i '
"form
of
tank
cell;
'
.
In
so
doing,
it
v
is’ often convenient or necessary.
Fig. 6 is ‘a vertical transverse section showing a
is desirable to employ a door or closure of the
same ?exible, rubber-like material as the'cell and
to give the cell opening and the door or closure ‘25
su?icient'reinforcement so thattheymay be eas
ily assembled together and subsequently clamped
in closing relation.
.
v,
modi?ed form of clamping means;
Fig. 7 is a vertical transverse section of the
two ‘clamping members employed in the modifica
tionof Fig. 6; and
‘
‘Fig.8 showspartially in elevation and partially
>
*inftransverse section a‘ special form of clamping
More speci?cally, it is intended to provide an
access door and tank cell opening with a,con-> 30 means and hanger arrangement for the tank cell.
tinuous, peripherally extending reinforcement
which will maintain the shape of both of these
parts and yet ?ex readily in any direction.
An additional object of the invention resides in
Referring to'Figs. 3 and 4, a tank cell of flex
ible rubber-like‘materia1 is designated generally
‘as l0 and is provided With a rigid housing“ struc
ture l2’, which'in this instance is the surface
structure of an aircraft.v It will be noted that
the provision of opposed clamping elements pro; 35 the
tank cell'Hl is'formed to provide a relatively
vided with spacing means fOr preventing undue
large opening I4 which is circular in the illus
compression of the cell material which is often
trated embodiments. An access door iii of the.
of a rubber subject to cold flow deformation.
same or similar material as the tank cell, is made
A further speci?c object is to modify the con
0 slight1y smaller and'of the same shape as the
struction of the tank cell around its opening and
opening l4 into'which it is ?tted.
the access door around its periphery so as to
‘An outer clamping ?ange l8 and an inner
replace a portion of ‘the cell-‘construction which
clamping ?ange 2i] engage the corresponding
is most susceptible to cold flow with a material
sides of the tank 'cell 10 and door or closure i6
50 as to span their juncture and clamp thesetwo
which is resistant thereto.‘
A further object of the invention, the details 45 tank cell parts in sealing relation. The outer
circular clamping ?ange I8 is provided with a
of which will be pointed out subsequently, is to
provide a form of clamping means for the tank
cell and access door which may be used without
series of spaced holes 22 for receiving the shanks
of a set of screws 24 which are threadedly en
modi?cation for tank cells of widely varying 50 gaged in’ a correspondingly spaced set of tapped
bosses 26 formed on the inner clamping ?ange
thickness withthe addition or subtraction of a
‘20, as shown in Fig. 3. rIv‘he clamping portion of
molding strip of resilient material.
~
the outer ?ange. i8 is formed to provide rounded
One of the more speci?c objects is to provide
gripping edges 28, 28 and a series of gripping
a special form of threaded means which may be
vused with the cell clamping; members toi'support v55 ‘ridges or ‘similar ‘formations .30, 30. Flange 20
2,406,708
3
has identical projections in the form of gripping
edges 32 and gripping ridges 34 acting in opposi
cell I0, it is believed unnecessary to repeat those
details.
tion to those of the clamping ?ange l8.
_
A particular feature of the inner clamping
flange 29 is a series of spacer elements 36 ex
,
The clamping means and tank cell opening and
access door reinforcements which have been de
scribed with respect to the illustrative embodi
ment of Figs. 1 to 4 may be adapted without
modi?cation to a tank cell‘ 58‘ of single layer con
struction. The tank cell 53 shown in Fig. 5 is
provided with an opening 6!] for receiving an
tending between the screw holes 22, as shown best
in Fig. 2. The spacer elements 36 are prefer
ably of arcuate shape or may be of short lengths
and arranged on the arc of a circle having the
radius of the centers of the screw openings 22. 10 access door 52. The tank cell 58 comprises a thin
It is the function of the spacer elements 36 to
wall layer 64 of ?exible rubber-like material such
?t between the peripheral edges of the tank cell
as neoprene or other synthetic rubber, which is
10 and the access door [6, and to engage the
opposite part of the outer clamping ?ange l8
resistant to the action of liquid hydrocarbons.
. Abo-utthe opening 69 the rubber-like layer 641 is
so as to limit the threaded screws 24 toa pre
1.5 faced and reinforced by identical inner and outer
layers 68 and 68, respectively, adhesively secured
pressible tank cell and door material. 7
thereto and composed of heavy fabric material
Figs. 1, 3 and 4 show the manner in which
impregnated with neoprene or the equivalent. By
the opposed peripheries of the tank cell ii] and
reason of the much less thickness of the tank cell
the access door of closure [53 are reinforcedby 20 58, it is necessary to provide a resilient molding
means of a hoop 38 andan identical but slightly
or ?ller strip "it, of any suitable rubber material
smaller hoop 41!, respectively.‘ Preferably, the
which willtake up the space and permit the use,
tank cell hoop 38 and the door hoop 4e are of
of the same clamping ?anges ‘wand 26 previously
rectangular cross-section andformed of braided
described. The outer surface of the door 52 will
determined clamping engagement with the com
steel wire impregnated and covered with a syn 25 also be provided with a molding or ?ller strip
thetic rubber material such as neoprene?or, other
12 about its periphery and extending beyond the
equivalent material. As used herein, ‘the term
“hoop” is not limited to a circular ring, but
denotes a continuous element having the con
?guration of the tank cell opening Ill.
The tank cell IE) is of the self-sealing, bullet
proof type speci?cally disclosed and claimed in
so
point of contact with the outer clamping ?ange
IS.
The reinforcement of the tank cell opening 59
and the periphery of the door 62 is by means of
hoops ‘l4 and ‘i6; respectively, whichare identical
with those which have been disclosed vin con
Gray and DeWeese patent application Serial No.
nection with the principal embodiment. ,Corre
338,052, ?led May 31, 19410, entitled “Self-sealing
spending use is also made of an impregnated
tank.” The cell ll! comprises four principal lay 35 braid reinforcement 13 as retaining means for
ers which are adhesively bonded together and
arranged in the manner shown. These layers are
the cell hoop 74, it being noted that the mold
ing or ?ller strips ‘l9 and ‘MY are provided with
a soft, vulcanized outer layer 42, a middle layer
adhesively secured fabric reinforcements 8c and
d4 of crude, unvulcanized rubber which is sub- .
82 on their respective inner faces.
ject to cold ,?ow and loss of shape under con
reinforcement layer 84, preferably'of balloon cloth
tinued clamping pressure, a highly, liquid hydro
carbon resistant, inner layer 45 of neoprene or
equivalent synthetic rubber composition,>and a
An outer
fabric impregnated with neoprene, covers the out
er end of the braid reinforcement 18 and is pro
vided with an upstanding ?ange 66 extending
relatively thin, inner liner layer 48 composed of
generally parallel with the thickness of. the ‘hoop
a strong fabric impregnated with neoprene, or '45 7A. As will be appreciated from an inspection
equivalent non-fabric material. Because‘of sus
of Fig. 5,, the door or closure reinforcing hoop
ceptibility to cold flow, the middle layer-M: of
‘i6 is secured in place in an identical manner.
crude unvulcanized rubber is replaced by a cir
Figs. 6, '7 and 8 illustrate a modi?ed form of
cular layer 58 extending as a ring about the
clamping means which may be used with the
tank cell opening Ill. The circular layer of filler 50 tank cell l0 and access door It of the principal
element to is preferably formed of fabric im
embodiment. The only difference is, in .an vouter
pregnated with neoprene or other synthetic rub
clamping ?ange 18%] which is provided with a
ber-like material of equivalent properties.
vtroughlike recess N32 for receiving the heads of
Means for retaining the reinforcing hoop 38.
the threaded clamping screws, the other ends
in position around the periphery of the tank gcell
of which threadedly engage an’ inner clamping
opening it are shown in Fig. 4 as comprising a
braid reinforcement 52 which is wrapped around
the edge of the opening so as to cover the hoop
38 and extend over the inner and outer sur
?ange'zeil in the same way as has been set forth.
It will also be noted that the clamping flanges
I80 and 208, which are of circular shape to corre
spond with thevcell opening, lack the inter
faces of the tank cell [0. This braid reinforce 60 mediate clamping ridges used in Figs. 3 and 34.
ment or continuous binding is impregnated with
With reference to Fig. '7, the inner clamping
?ange 299 is further modi?ed in its provision
neoprene or the like and secured in the position
for a spaced series of transverse holes or open
shown by Fig. 4. The outer side of the tank cell
ings 202 through its web 2134 for permitting free
NJ has a seam cover 54, of balloon cloth fabric '
drainage of gasoline or other liquid hydrocar
impregnated with neoprene or the like, and pro
bon.
vided with an upstanding ?ange 56 extending
In Fig. 8 there is shown a special screw or bolt
within the space between the tank cell opening
246 which functions both as a threaded clamping
l4 and the spacer elements 36, or clamping
.means for the outer and inner ?anges £89 and
screws 24. This seam cover 54 will also be se
70
290, and also as a hanger for securing the at
cured in place by a suitable adhesive. Since
tached
tank cellto its rigid housing structure I2.
the means for securing the door reinforcing hoop
The bolt 240 is provided vintermediate its length
4B in position and the construction of the door
with a nut-shaped head 242 abovea washer 254
I6 around its edge are identical with that which .»
"have been described for the opening of the tank "is received in the outer face recess I82 of the ?ange
189. By means of the head 242, a threaded
2,406,708
shank'part'?d may 'be'turned into the inner
‘clamping member 200 to draw it toward ‘the
outer clamping“ member‘ I80. ‘The ‘outer’ end
of the bolt 24il'has~ a larger threaded shank 248
engaged by'a wing nut‘250 and locked by a wire
252 when clamped'down upon the plane portions
6
of ‘ reiniorced,~rubber-like material extending
around the periphery of the door,‘ similar con
tinuous binding means for securing said second
?exible hoop to the door, an outer clamping
?ange spanning the juncture between the cell
opening and the door, an inner clamping ?ange
arranged in opposition to the outer ?ange, means
at spaced positions on one of the clamping ?anges
and extending betweenethe two hoops for limiting
cell Ill and its access door or closure ' I6 are
clamping action of the clamping ?anges on
securedjor hung to the rigid housing structure 10 the
the tank cell and the door, and detachable
of the ‘structure l2 through van intermediate
clamping Washer 254. In this manner, the tank
l2.
'
'i'
t
-
'
It will be apparent that the modi?ed form of
clamping means illustrated in Figs. 6, '7; and 8
may be" appliedleither to’ the multiple layer cell
I0’ or “to thesinglelayer tank cell'58 with the
use‘ of rubber molding ‘or ?llers-‘I0 and ‘I2.
The access‘ doorv ?tting 'whichfhas been de-,
scribed ‘in detail is readily attachedtothetank
threaded Tmeans engaging the clamping ?anges
to. maintain them in [clamping position, said
clamping ?anges beingformed with opposed projections for gripping the tank cell and the door.
'
3. The combination comprising a hydrocarbon
licijid, container cell formed of three layers of
"rubber-like} material, the intermediate layer of
which'issubject-tocold?ow, said tank cell being
cell and lanj'adequate, but non-destructive, seal
ingis obtained with the- clamping means of this 20 'provide'dwith a relatively large opening in its
wall, a closure of the tank cell wall material ?tted
invention. With the special form of cell open
within said opening, a ?rst ring-shaped ?ller lay
ing and door edge de?ning hoops of this inven
er of material resistant tocold ?ow inserted be
tion, the mating edges are fully protected against
tween two of the layers of rubber-like material
tearing and damage so that the access door may
be removed and replaced as often as may be 25 around the tank cell opening and in place of the
intermediate layer, said intermediate layer being
necessary.
_
cut away from the tank cell opening to receive
the ?rst ?ller layer, a second ring-shaped ?ller
shown illustratively, other forms of opening and
layer of material resistant to cold ?ow inserted
?ttings may be employed as convenient. It will
between
two of the layers of rubber-like material
also be understood that various changes may 30
around the periphery of the closure and in place
be made in the details of construction and ar
of the intermediate layer, said intermediate lay
rangement of the elements of this ?tting without
er being cut away from the closure periphery to
departing from the spirit of the invention and
receive the second ?ller layer, a binder strip se
the scope of the appended claims.
Having thus described my invention, what I 35 cured to the inner and outer faces of said closure
around said opening, an outer clamping ?ange co
claim as new and desire to secure by Letters
extensive with the tank cell opening and spanning
Patent of the United States is:
the juncture between the tank cell opening and
1.‘ An access door construction for a ?exible,
the closure, an inner clamping ?ange coextensive
rubber-like tank cell provided with a relatively
large generally circular opening in its wall, com 40 with the tank cell opening and arranged in oppo
While a circular access door ?tting has been
prising, a door of the same material as the tank
cell ?tted within said opening,'a ?rst ?exible hoop
sition to the outer ?ange, means on one of the
?anges and extending between the cell opening
and closure peripheries for predeterminedly lim
of reinforced, rubber-like material positioned
iting the clamping action of the ?anges on the
against the periphery of the circular opening
of the tank cell, means for securing said ?rst 45 tank cell and the closure, and separable means en
gaging the clamping ?anges to maintain them in
?exible hoop to the tank cell, said means com
clamping position.
prising a continuous strip covering said hoop, said
4. The combination comprising a hydrocarbon
strip being secured to the inner and outer sur
liquid container cell 'i’ormed of three layers of rub
faces of said wall around said opening, a second
?exible hoop of reinforced, rubber-like mate 50 her-like material, the intermediate layer of which
is subject to cold ?ow, said tank cell being pro
rial extending around the periphery of the door,
vided with a relatively large opening in its wall,
similar means for securing said second ?exible
a closure of the tank cell wall material ?tted with
in said opening, a ?rst ring-shaped ?ller layer
cell and the door, a continuous inner clamping 55 of material resistant to cold ?ow inserted be
tween two of the layers of rubber-like material
?ange arranged in opposition to the outer ?ange,
around the tank cell opening and in place of the
spacer elements on one of the clamping ?anges
intermediate
layer, said intermediate layer being
and extending between the two hoops for limit
cut away from the tank cell opening to receive the
ing the clamping action of the clamping ?anges
on the tank cell and the door, and separable 60 ?rst ?ller layer, a second ring-shaped ?ller layer
of material resistant to cold ?ow inserted between
means engaging the clamping ?anges between
two of the layers of rubber-like material around
the spacer elements to maintain them in clamp
the periphery of the closure and in place of the
ing position.
intermediate layer, said intermediate layer being
2. An access door construction for a liquid
fuel or lubricant tank cell comprising one or 65 cut away from the closure periphery to receive the
second ?ller layer, a binder strip secured to the
more layers of rubber-like material subject to
inner and outer faces of said cell wall and said
cold ?ow and provided with a relatively large
closure around said opening, an outer clamping
opening in its wall, comprising, a door of the
tank cell material ?tted within said opening, a‘ . ?ange coextensive with the tank cell opening and
spanning the juncture between the tank cell
?rst ?exible hoop of reinforced, rubber-like mate m opening
and the closure, an inner clamping ?ange
rial positioned against the periphery of the
coextensive withthe tank cell opening and ar
opening of the cell, continuous binding means ‘
ranged in opposition to the outer ?ange, means
secured to the inner and outer surfaces of said
on one of the ?anges and extending between the
wall around said opening for securing said ?rst
cell opening and closure peripheries tor prede
?exible hoop to the cell, a second ?exible hoop
' hoop to the door, a continuous outer clamping
?ange spanning the juncture between the tank
7
2,406,708
terminedly limiting the clamping action of the
?anges on the tank} cell and the-closure, separa
ble screws engaging the clasping ?anges to
maintain them in clamping position, and a rigid
housing structure con?ning the tank cell, the
closure, and the clamping ?anges, at least one of
said screws having a nut threaded on one end and
8
.ing of the tank cell, meansfor securing said ?rst
?exible hoop to ‘the tank cell and its molding
strip, said means comprising a continuous binder
strip covering said hoop, said strip being secured
to the inner and outer surfaces of said cell wall
and molding strip around said opening, a second
?exible hoop of reinforced, rubber-like material
a Washer thereunder for engaging and hanging
extending around the periphery .of the door,.simi
the tank cell to the rigid housing structure.
lar means for ‘securingcsaid second ?exible hoop
5. An access door construction for a single lay .10 to the door and its molding strip, an outer clamp
er, ?exible, rubber-like tank cell provided with a
ing ?ange spanning the juncture between the
circular opening in its wall, comprising a door of
cell opening and the‘ door, an inner clamping
similar material to the cell ?tted within said
?ange arranged in opposition to the outer ?ange,
opening, a resilient molding strip of appreciable
means on one of the clamping ?anges and ex
thickness secured to and facing thetank cell lay
tending between the, two hoops for predeter
er around its opening, another vresilient molding
strip of appreciable thickness secured to and fac
ing the door around its periphery, a ?rst ?exible
hoop of reinforced, rubber-like material ‘posi
tioned against the periphery of the circular open- , .
minedly limiting the clamping action of the
clamping ?anges, and detachable threaded means
engaging the clamping ?anges to maintain them
in clamping position.
,
I
FRANCIS‘ J. PEPERSACK.
Документ
Категория
Без категории
Просмотров
0
Размер файла
761 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа