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Патент USA US3038444

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June 12, 1962
D. R. LIGH
3,038,434
RESILIENT CLOSURE SUPPORT
Filed Nov. 3, 1958
5 Sheets-Sheet 1
6%
June 12, 1962
3,038,434
D. R. LIGH
RESILIENT CLOSURE SUPPORT
Filed Nov. 5, 1958
5 Sheets-Sheet 5
V// / / ‘
INVENTOR‘
BY
W5. WM
My
June 12, 1962
3,038,434
D. R. LlGH
RESILIENT CLOSURE SUPPORT
Filed Nov. 3, 1958
5 Sheets-Sheet 4
INVENTOR.
BY
June 12,- 1962
.
>
_
D. R. LIGH
-
3,038,434 ‘
RESILIENT CLOSURE SUPPORT
Filed Nov. 3, 195a
'
-
5 Sheets-Sheet 5
mr l.
lI H T
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JNVENIOR.
PMK. OLLYL
’ ?/M 5, mid
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United States Patent Gihce
3,938,434
Patented June 12, 1962
Lin);
2
3,338,434
tive position; and means for moving the closure element
RESZLIENT CLGSURE SUPPORT
in operative position toward the supporting element while
the resilient supporting means yields so that the closure
element can assume a sealing position. In accordance
(Madison, NJ.)
with one embodiment of the present invention the resilient
Fiied Nov. 3, 1958, Ser. No. 771,286
14 (Iiaims. (Cl. 114-202)
supporting means is strong enough to move the closure ele
ment away from the supporting element when the closure
The present invention relates to a resilient closure sup
element is released. Thereby, the closure element is
port, and more particularly to a resilient support for the
raised to a position in which the second supporting means
wheels of a hatch cover.
10 are located on the level of the surface of the supporting
Closure arrangements are known in which a heavy
element, so that the second supporting means can move
closure element, for example a hatch cover, is movable be
along the same during movement of the closure element
tween an operative position covering an opening, such as
between operative and inoperative positions. In another
a hatch, and an inoperative position uncovering the open
embodiment manually operated means are provided for
ing. Heavy closure elements are suppo1ted on Wheels 15 raising the closure element whose weight is substantially
which roll along tracks adjacent the opening.
compensated by the resilient supporting means which are
It is necessary to obtain a tight closure by pressing the
located on the stationary supporting element, for example
David R. Light, Mariners Harbor, NX.
closure element against the edge surrounding the opening,
on the deck of a ship.
for example against a hatch coaming. In accordance
with the constructions of the known art, the wheels of
the closure element are supported on movable platforms
which can be raised and lowered by mechanical or hy
In the preferred embodiment of the present invention, a
hatch cover element is provided with a gasket which is
draulic means to permit movement of the closure element
between a position in which the opening is tightly sealed,
pressed against a hatch coaming. The second supporting
means have wheel means and are mounted on the hatch
cover, and the ?rst supporting means is a resilient means
including a portion located at the level of tracks on which
and a position in which the wheels are located at the level 25 the wheel means normally roll during opening and closing
of the tracks, so as to roll on the same during opening and
operations. When the hatch cover is pressed down by
closing operations.
It is one object of the present invention to improve the
known constructions of this type, and to provide resilient
means under the wheel supporting platforms.
Another object of the present invention is to provide a
hatch cover which can be secured in a sealing position by
locking means, but is automatically ready for movement
to an open position when the locking clamps are released.
Another object of the present invention is to support 35
the wheels of a closure element on resilient means when
the closure element is in an operative position covering
an opening so that the cover element can be pressed
locking clamps or dog latches, the resilient means yield
and the wheels pass into an opening provided in the region
of the tracks.
As explained above, the resilient means are strong
enough to raise the hatch cover when the locking clamps
are released so that the wheels are located at the level of
the track permitting operation of the hatch cover or can be
easily raised to this level.
The novel features which are considered as character
istic for the invention are set forth in particular in the
appended claims. The invention itself, however, both as
to its construction and its method of operation, together
against the opening while the resilient means yield.
with additional objects and advantages thereof, will be
Another object of the present invention is to make 40 best understood from the following description of speci?c
such resilient means su?iciently strong to raise the closure
element into a position in which the wheels are located
on the level of tracks.
Another object of the present invention is to provide
resilient means of such spring force as to compensate the
weight of the closure element so that the closure element
can be raised or lowered without effort by manually oper
ated means.
An important object of the present invention is to pro
embodiments when read in connection with the accom
panying drawings, in which:
FIGURE 1 is a side elevation showing a preferred em
bodiment of the present invention as applied to a hatch
cover;
FIGURE 2 is a fragmentary side view illustrating a
detail of FIGURE 1 on an enlarged scale, and showing
the elements in a ?rst operational position;
FIGURE 3 is a fragmentary side view corresponding
vide a hatch cover arrangement in which the gasket of the 50 to FIGURE 2 but illustrating another operational posi
hatch cover is not subjected to cha?ng during the opening
and closing operations.
A futher object of the present invention is to provide a
closure arrangement in which no multiple tracks are re
tion;
FIGURE 4 is a fragmentary sectional view taken on
line IV—-IV in FIGURE 1 and illustrating a detail on an
enlarged scale;
‘
quired for the wheels of the closure element.
FIGURE 5 is a fragmentary side View of the detail
55
Another object of the present invention is to provide
shown in FIGURE 4;
track means touching the periphery of the wheels in the
FIGURE 6 is a fragmentary cross sectional view taken
position in which the resilient means are compressed and
on line VI-VI in FIGURE 1 and illustrating another
the closure tightly closed by the locking clamp means so
detail of the construction;
that the wheels can move up to the tracks even if the 60
FIG. 7 is a plan view of another embodiment of the
resilient means fail to raise the closure element.
With these objects in view, the present invention mainly
present invention;
FIGURE 8 is a side view of the embodiment illustra
consists in a closure arrangement which comprises a sup
ted in FIGURE 7;
porting element formed with an opening, a closure ele
FIGURE 9 is a fragmentary side view showing a detail
ment, such as a hatch cover, which is movable between 65 of FIGURE 8 on an enlarged scale;
an inoperative position uncovering the opening, and an
FIGURE 10 is a sectional view of a device according
operative position covering the opening; ?rst supporting
to the present invention which may be used in the embodi
means forming part of the supporting element, and sec
ments of FIGURES l and 7;
ond supporting means mounted on the closure element,
FIGURE 11 is a sectional view showing the device of
at least one of said supporting means being resilient, and 70 FIGURE 10 in another operational position; and
the second supporting means being located on the ?rst sup
FIGURE 12 is a sectional View taken on line 12-—12 in
porting means when the closure element is in the opera
FIGURE 11.
3
Referring now to the drawings, and more particularly
to FIGURE 1, a hatch cover is shown which includes two
hatch cover elements respectively mounted on pivot means
8 and 9. Each hatch cover element includes two sections
1, 2 and 3, 4 respectively. Hatch cover sections 1 and 2
are articulated by hinge means 10, and hatch cover sec
tions 3 and 4 are articulated by hinge means 11.
4i
a spring-loaded gasket release mechanism is provided
for each wheel 12 and 13, which will now be described
in detail with references to FIGURES 2, 3 and 6.
A resilient supporting means 23 is provided for each
wheel 12,,and 13, and so located in the region of the deck
surface, or in the region of the tracks 29, that the wheels
are located on the platform portion 26 of the resilient
supporting means 23 when the hatch cover is in the oper
In the illustrated position, the hatch cover element is
ative position illustrated in FIGURE 1.
operative and covers the hatch or opening 5 which is sur
The resilient supporting means 23 includes an outer
rounded by the hatch coaming 55. The hatch cover can 10
be moved to an inoperative position uncovering the hatch
casing 27 whose top plate 31 has an opening bounded by
edges 32. Resilient means 28, shown to be coil springs,
5 by suitable operating means which are not an object of
the present invention. For example, lifting eyes 1a may
be provided on the hatch cover, and a hook from the
are located in casing 27 and abut against platform 26 to
urge the same into the position shown in FIGURE 2 in
hatch cover element for moving the same. When the
hatch cover elements are raised, the sections 1 and 2 fold
opening in top wall 31. The wider ?ange portions of
platform 26 abut against the inner face of top wall 31
ship’s hoisting gear is attached to the lifting eye 1a of a 15 which the portion 26a of platform 26 passes into the
in a position in which the top face 226 is located at the
level of the top face of wall 31, and also at the level of
8a, 9a on the pivot means 8 and 9. Wheels 12 are se 20 the tracks 29.
The resilient means 28 are su?‘lciently strong to sup
cured to opposite sides of the hatch cover sections 2 and
port the component of the weight of the hatch cover
3 and roll on tracks 29, best seen in FIGURES 2 and 3,
upon each other until they assume a substantially upright
position in which further movement is prevented by stops
which extend on opposite sides of the hatch cover out
wardly of the hatch coaming 55.
which is transmitted through the wheels 12 or 13 to the
platform 26.
Consequently when the hatch cover is
As best seen in FIGURE 6, the wheels 12 are rotatably 25 moved to the operative position shown in FIGURE 1,
and the wheels 12 roll from the tracks 29 onto the plat
supported on aXles 24 which are mounted on brackets 57.
form
portion 126 and stop there, the position of FIGURE
Brackets 57 are secured to the respective hatch cover sec
tions 2 and 3, respectively.
A gasket 15 is secured to the hatch cover and has a
2 will be maintained until the locking clamps 19, 20, 21
and 22 are operated to press down the hatch cover sec
sealing face cooperating with the hatch coaming 55. 30 tions into the position shown in FIGURE 6 in which the
wheels 12 and 13 pass through the opening in the top
Transverse gaskets 16, 17 and 18 are provided between
the hatch cover sections to seal the spaces between the
same when the hatch cover is closed.
Pairs of locking clamps or dog latches 19, 20, 21 and
wall 31, and compress springs 28 as shown in FIGURES
3‘ and 6. In this position, the hatch cover is tightly sealed
since the sealing face of gasket 15 engages the hatch
22 are spaced along the sides of the hatch cover, as best 35 coaming 55.
As soon as the locking clamps or dog latches 19, 20,
seen in FIGURE 1. FIGURES 4 and 5 show the con
21 and 22 are released by moving clamping member 202,
struction of the locking clamps in detail, and it will be
204, 204a away from clamping member 201, the resilient
understood that only one locking clamp 20 is shown in
means 28 immediately overcome the weight component
FIGURE 4, while the other locking clamp 20 of the pair
is located on the other side of the hatch cover, which is 40 of the hatch cover sections associated therewith, and the
not shown in FIGURE 4.
Each locking clamp includes a ?rst clamping member
201 secured to a hatch cover section, and a second mov
able clamping member 202 which is pivotally secured to
wheels are raised to the level of tracks 29. When the
hatch cover sections 1, 2, 3 and 4 are now raised and folded
into an inoperative position in which the hatch is un
covered, the wheels 12 and 13 will roll on the tracks 29
while the sections 1, 2 and 3, 4» fold upon each other, re
a ?xed supporting element and is turnable about a pivot 45 spectively. When the hatch cover means are lowered,
the wheels 12 and ‘13 will again roll on the tracks 29
until the hatch is covered and the wheels are again located
to member 202 by a pivot pin 205 and has a handle 206.
on the platform portions 126. When the hatch cover is
A transverse pin 204a is secured to clamping member
now
clamped down by operation of the dog latches 19,
204 and can be placed in a position engaging a matching 50 20, 21 and 22, the resilient means 28 are compressed, and
arcuate surface 201a of clamping member 201. Clamp
the wheels assume the position shown in FIGURES 3
ing member 202 is pivoted into a releasing position re
and 6. It will be appreciated that in accordance with the
leasing clamping member 201 when it is desired to open
present invention, the weight component acting on the re
the hatch cover. In the operative position of the hatch
silient means 28 is not su?icient to compress the springs
cover shown in FIGURE 1, clamping member 204 is 55 until the dog latches are operated. For example, if the
placed on clamping member 201 while handle 206 is in
weight acting on one wheel is 5,000 lbs., the respective
pin 203. The movable clamping member 202 includes
another clamping member 204 which is pivotally secured
a substantially horizontal position, and when handle 206
resilient means 28 are dimensioned to exert an upward
is turned to the illustrated vertical position, a toggle lever
pressure of 6,000 lbs. so that an additional pressure of
action is exerted by which the hatch cover is moved
1,000 lbs. must be exerted by the associated dog latch to
toward the hatch coaming until the sealing face of the 60 compress the respective resilient means until the gasket
gasket '15 engages the hatch coaming 55, and the gasket
is in tight sealing engagement with the hatch coaming.
is sufficiently compressed to assure a tight seal. A stop
In the illustrated embodiment, an independent resilient
60 which is secured to the hatch cover limits compression
supporting means 23 is provided for each wheel so that
of gasket 15. When the hatch cover is to be opened,
four resilient supporting means are respectively associated
handle 206’ is turned counterclockwise so that pin 24a 65 with the four rotatable supporting means constituted by
turns on the bearing surface 201a and member 202 turns
the pair of wheels 12 and the pair of wheels 13. It is,
about pin 203. Thereby, the pressure is relieved and
however, also possible to provide a single spring-loaded
?nally handle 206 can be turned to a position in which
platform on either side of the hatch cover, so that one
pin 204 is located above member 201 so that members
wheel 12 and one wheel 13 are resiliently supported on a
202, 204, 206 can be turned to an inoperative position 70
common platform.
located below pin 203.
The opening in the top wall 31 of the resilient support
It will he noted that it is necessary to lower wheels 12
ing means 23 is so dimensioned and positioned that the
and 13 below the level of the tracks in order to obtain
edges 32 or at least one edge 32, just touch the periphery
the sealing engagement ‘between the gasket 15 and the
of the respective wheel when the wheel is in the lower
coaming 55. In accordance with the present invention,
5
3,038,434
position illustrated in FIGURE 3 in which the hatch cover
is in sealing position. This arrangement has the advan
tage that the hatch cover can be withdrawn to inopera
In accordance with the present invention, a springdoaded
mechanism 123 is provided for each wheel 112, and the
tive position even if the resilient supporting means 23
fail to operate. For example, if the platform 26 is jammed
in the position shown in FIGURE 3, so that the wheels
are not raised even when the dog latches are released,
used in the embodiment of FIGURES 7 to 9.
mechanism illustrated in FIGURES 2 and 3 may be also
As ex
plained above, springs 28 will raise platforms 26 to a po
sition in which the top surfaces 226 of portions 26a are
flush With the tracks, so that the wheels may roll onto the
then the wheels will climb up the edge 32 which operates
tracks when gears 131 are turned while in meshing en
as a ramp for raising the wheel to the higher position for
gagement with rack bars 131}.
rolling on the tracks 29.
1O
However, when the hatch cover sections are in opera
In a hatch cover arrangement in which four foldable
sections are hinged together with a pair of wheels pro
vided for each pair of hinged sections, a resilient support
ing means 23 as shown in FIGURE 2 is provided for
each wheel. This would correspond to an arrangement
in which the sections 2 and 3 are hinged together, and the
wheels 18 are secured to section 4. In this event, the
wheels 13 secured to section 4- would roll over the re—
silient supporting means 23 which normally support the
wheels 12 secured to section 2.
Such an arrangement
avoids multiple tracks which otherwise would have to
be provided in a hatch cover construction using four
articulated sections.
The resilient means 28 are shown to be coil springs but
it will be appreciated that instead of coil springs other
resilient means such as air springs may be provided.
From the above description of one embodiment of the
tive positions closing the hatch opening, operation of the
dog latches 119 will com-press springs 28 so that the plat
forms move to the position illustrated in FIGURE 3. As
soon as the dog latches are released, the platforms 26 are
raised by springs 28, and the wheels are automatically
returned to the level of the tracks.
In both embodiments of the present invention a modi
?ed mechanism may be provided for supporting the wheels
12, or 112. As explained above, the springs 28 in the em
bodiment in FIGURES 2 and 3 have together a spring
force exceeding the weight of the respective hatch cover.
In the embodiment illustrated in FIGURES l0, l1 and 12,
the weight of the respective hatch cover portion slightly
exceeds the spring force ‘of the springs 128 by a small
margin. Consequently, in the operative position of the
hatch cover, platforms 126 will tend to move to the
lower position illustrated in FIGURE 10. A spindle
illustrated embodiment of the present invention it will
means 150 is threaded into a nut 151 which is turnably
become apparent that the closure arrangement according
mounted in a casing 127. Nut 151 has a bevel gear por
to the present invention includes a supporting element 30 tion 152 meshing with a bevel gear 153 whose shaft 154
formed with an opening 5, a closure element 1, 2 for clos
is turnably mounted in a bearing 155 in the casing 128.
ing the opening, stationary supporting means 23 forming
A handle 156 is connected to shaft 154 by a coupling 157.
part of the supporting element, and rotatable supporting
When handle 156 is turned, out 151 will also turn, and
means 12 mounted on the closure element 1, 2. One of
since nut 151 is held by a ring 157 in the casing 127
the supporting means is resilient and movable in vertical
against movement in axial direction, the spindle 15!} will
direction, namely the supporting means 23. Means for
be moved in axial direction.
moving the closure element ll, 2 toward the supporting
Spindle 150‘ is preferably ?xedly secured to the respec
element are provided in the form of hooking clamps 19
tive platform 126. This construction operates as follows:
which are capable of moving the closure 1, 2 to a sealing
the hatch cover sections are closed, the wheels
position engaging the edge portion 55 which surrounds 40 112When
rest on the platforms which are supported by the
the opening 5 while the resilient supporting means 23
spindles 150. When handle 156 is turned, spindle 153
yield.
and platform 126 is lowered, and the wheel 112 resting
Referring now to FIGURES 7, 8 and 9 which illustrate
on the platform will also be lowered into the position
another embodiment of the present invention, a hatch
shown in FIGURE 10. When it is desired to open the
opening 135 is provided in the deck of a ship, and sur
hatch, handle 156 is turned in the opposite direction until
rounded by a hatch coaming 155. Two hatch cover sec
platform 126 is raised to the level of tracks 129. Since
tions 1G1 and 1132 are provided for closing the hatch, and
the Weight of the hatch cover sections is almost completely
have wheels-112 which roll on tracks 12?. Rack bars 13%
are secured to each of the sections on both sides of the
same, and mesh, respectively with gears 131 which are
turnably mounted on the supporting plate means of the
deck. The gears 131 are driven by pairs of bevel gears
132 of which one is secured to a shaft 133 mounted in bear
ings ‘131i and the other is connected to a gear 131 for ro
tation. Shafts 133 are driven by motor means 135 which
may be an electric motor. Gaskets 1411 are secured to each
of the hatch cover sections 161 and 162 and cooperate
with the coaming 155. Gasket 117' extends between hatch
compensated by the spring force of springs 12%, lowering
and raising of the platform 126 with the hatch cover sec
tions resting thereon will require almost no effort, since the
operator has to overcome only the difference between the
Weight of the hatch cover and the spring force.
According to a modi?ed construction of the present in
vention, the upper end of spindle 151) is not ?xedly secured
to the respective platform 126. This ‘modi?ed embodi
ment operates as follows:
When spindle 150 is raised by handle 156, its end abuts
against platform 126, and raises the platform with wheel
cover section 111-1 and 1132 and abuts an inclined shoulder
112 and the hatch cover, as described above. In the posi
on hatch cover section 1132, as shown in FIG. 9.
When motor 135 is operated, shafts 133 turn the gear iii) tion of FIGURE 11, the wheels are again located at the
level of the tracks 129, and the hatch covers can be rolled
means 132 and 131 so that the two hatch cover sections
away, or folded.
move apart in a horizontal plane to assume a position in
which the hatch is opened.
A plurality of dog latches 119 are provided around the
hatch cover sections, each dog latch including a member
secured to the respective hatch cover section, and a
member secured to the hatch coaming so that in the il
lustrated operative position of the hatch cover, the gaskets
of the hatch cover sections can be pressed against the
hatch coaming for sealing the hatch. The dog latch may
be of the construction illustrated in FIGURES 4 and 5.
‘It will be noted that it is necessary to lower wheels 112
below the level of the tracks in order to obtain the sealing
engagement between the gaskets and the hatch coaming.
When the hatch cover is again closed, the wheels 112
are again positioned on the platforms 126. When handle
156 is now turned to lower spindle 15!}, platform 126
and wheels 112 will also be lowered in the position shown
in FIGURE 10. However, if the spindle is further
lowered, in‘ a certain position of the platform the spring
force of spring 128 will be su?icient to support the respec
tive Weight portion of the hatch cover, and spindle 15a
will separate from platform 126. When the dog latches
119 are now operated, the gaskets 140 are pressed into
engagement with the hatch coaming While springs 123
are further depressed. It Will be understood that the
spindle 150 will be sufficiently lowered to permit a further
3,088,434:
7
lowering of the platform 126 during operation of the
dog latches.
O
as
tatable second supporting means being located on said
resilient ?rst supporting means when said closure element
is in said operative position, and moving along said sup
porting element during movement of ‘said closure element
between said positions; and means for moving said clos
ure element toward said supporting element in said op
In the embodiment in which the spindle is ?xedly se
cured to the platform 126, spindles 150 will have to be
lowered until the platforms 126 release the wheels 112
while the hatch cover rests on the hatch coaming. There
erative position of said closure element while said re
upon, the dog latches are operated to clamp the hatch
silient ?rst supporting means yields due to the resiliency
cover against the hatch coaming.
thereof, said resilient ?rst supporting means moving said
As compared with the prior art in which hydraulic or
electric jacks were used for raising the wheels to the level 10 closure element away from said supporting element upon
termination of the action of said moving means.
of the tracks, the construction of the present invention
3‘ In a hatch cover arrangement, in combination, a
has the great advantage, that a small manual force is
supporting element formed with an opening and including
suf?cient for raising the hatch cover to the level of the
a hatch coaming surrounding said opening; a hatch cover
tracks, since the major portion of the weight of the hatch
15 element for closing said opening and including a plurality
cover is supported by those spring means 128.
of articulated sections foldable upon each other, one of
It will be understood that each of the elements described
said sections being turnably mounted on said supporting
above, or ‘two or more together, may also ?nd a useful
element, said hatch cover element being movable be
application in other types of closure arrangements differ
tween
an inoperative position in which said sections are
ing from the types described above.
folded upon each other and uncover said opening and an
While the invention has been illustrated and described
operative position in which said sections are located in
as embodied in a hatch cover arrangement including re
a plane and cover said opening; resilient ?rst supporting
silient supporting means for supporting the hatch cover
means forming part of said supporting element, and ro
when the dog latches are released, it is not intended to be
tabable second supporting means mounted ‘on another
limited to the details shown, since various modi?cations
and structural changes may be made without departing in 25 section of said thatch cover element for supporting the
same on said supporting element transversely spaced from
any way from the spirit of the present invention.
said supporting element during movement of said hatch
Without further analysis, the foregoing will so fully
cover element between said operative and inoperative
reveal the gist of the present invention that others can by
positions, said resilient supporting means having a spring
applying current knowledge readily adapt it for various
applications without omitting features that, from the 30 force greater than the weight of said closure element
standpoint of prior art, fairly constitute essential charac
said rotatable second supporting means being located on
l. in a closure arrangement, in combination, a sup
position of said hat-ch cover element while said resilient
?rst supporting means yields due to- the resiliency thereof,
said resilient ?rst supporting means when said hatch cover
teristics of the generic or speci?c aspects of this inven
element is in said operative position, and moving along
tion and, therefore, such adaptations should and are in
said supporting element during movement of said hatch
tended to be comprehended within the meaning and range
35 cover element between said positions; and means for
of equivalence of the following claims.
moving said hatch cover element toward said hatch
What is claimed as new and desired to be secured by
coaming of said supporting element in said operative
Letters Patent is:
popting element formed with an opening; a closure ele
ment for closing said opening and ‘being movable be
tween an inoperative position uncovering said opening,
and an operative position covering said opening; ?rst
supporting means forming part of said supporting ele
ment, and second rotatable supporting means mounted
said resilient ?rst supporting means mowing said hatch
cover element away from said supporting element upon
termination of the action of said moving means.
4. :In a closure arrangement, in combination, a sup
porting element and being formed with an opening and
on said closure element for supporting the same on said 45 having a supporting wall formed with an aperture
bounded by an edge of said wall; a closure element for
supporting element transversely spaced from said sup
porting element during movement of said closure element
between said operative and inoperative positions, at least
one of said supporting means being resilient, said resilient
supporting means having a spring force greater than the
weight of said closure element, said second rotatable sup
ponting means being located ‘on said ?rst supporting
closing said opening and being movable between an in
operative position uncovering said opening and an op
erative position covering said opening; ?rst resilient sup
porting means forming part of said supporting element,
and second supporting means mounted on said closure
element and including rotatable wheels for supporting
said closure element on said supporting wall during move
ment of said closure element transversely spaced from
movement of said closure element between said positions; 55 said supporting element between said operative and in
operative positions, said resilient supporting means hav
and means for moving said closure element toward said
ing a spring force greater than the weight of said closure
supporting element in said operative position of said
element said wheels of said second supporting means
closure element while said one resilient supporting means
being located on said ?rst resilient supporting means
yields due to the resiliency thereof, said one resilient sup
porting means moving said closure element away from 60 when said closure element is in said operative position,
said wheels rolling along said supporting wall of said
said supporting element upon termination of the action
supporting element during movement of said closure ele
of said moving means.
2. In a closure arrangement, in combination, a sup
ment; and clamping means for moving said closure ele
porting element formed with an opening; a closure ele
ment toward said supporting element in said operative
ment for closing said opening and being movable be 65 position of said closure element while said first resilient
tween an inoperative position uncovering said opening,
supporting means yields due to the resiliency thereof,
and an operative position covering said opening; resilient
said ?rst resilient supporting means normally moving said
?rst supporting means forming part of said supporting
closure element away from said supporting element upon
element, and rotatable second supporting means mounted
termination of the action of said clamping means and
on said closure element for supporting the same on said 70
moving
said wheels to the level of said supporting wall,
supporting element transversely spaced from said sup
a portion of said wall located in the direction of move
porting element during movement of said closure ele
ment of said wheel means touching the periphery of said
ment between said operative and inoperative positions,
wheel means so that said wheel means may pass to the
said resilient supporting means having a spring force
greater than the weight of said closure element said ro 75 level of said supporting Wall even if said wheel means
means when said closure element is in said operative po—
sition, and moving along said supporting element during
3,038,484
10
are not moved by said resilient means to the level of said
and including track means extending along said opening
outside of said hatch coaming portion, said supporting
supporting wall.
5. In a closure arrangement, in combination, a support
ing element having having a supporting face and an open—
portion of said resilient means being aligned with said
ing bounded by a sealing portion, said supporting element
supporting portion in said operative position of said hatch
track means so that said Wheel means are located on said
including a resilient means having a supporting portion
cover element, and roll on said track means during move
normally ?ush with said supporting face; a closure ele
ment for closing said opening and having a sealing face,
ment of said hatch cover element to and from said inoper
ative position.
said closure element being movable between an operative
8. A hatch cover arrangement as set forth in claim 6
position in which said sem‘ing face is located opposite said 1O wherein said clamping means include a plurality of clamp
sealing portion and in which said opening is covered, and
ing elements spaced along said sections of said hatch cover
an inoperative position in which said opening is uncov
element in a direction transverse to the direction of the
ered; wheel means secured to said closure element and
turning axis of said hatch cover element, each of said
being in rolling engagement with said supporting face of
clamping elements including a ?rst clamping member se
said supporting element during movement between said
cured to one or" said sections, and a second clamping
positions for supporting said closure element, said wheel
member secured to said supporting element and being
means being located on said supporting portion of said
movable to a position engaging said ?rst clamping mem
resilient means in said operative position of said closure
ber, and further to a position for urging said first clamping
element, said resilient means having a spring force greater
member and said hatch cover element toward said sup
than the Weight of said closure element and resiliently sup
porting element.
porting said wheel means and closure element in a mov
able position in which said wheel means are ?ush with
9. In a hatch cover arrangement, in combination, a sup
porting element including track means and an opening
bounded by a sealing hatch coaming portion; a movable
said supporting face of said supporting means for rolling
on the same and in which said closure element is trans
versely spaced from said supporting element; and clamp
ing means for moving said closure element in said opera
supporting platform on said supporting element aligned
25 With said track means; a resilient means including coil
tive-position thereof toward said supporting element While
said resilient means resiliently yields, and for holding said
closure element in a sealing position in which said sealing
face is in sealing engagement with said sealing portion, 30
said resilient means urging said closure means upon re
lease of said clamping means to said movable position.
6. In a hatch cover arrangement, in combination, a sup
porting element having a supporting face and an opening
springs engaging said supporting platform, and said sup
porting element, and urging said supporting platform into
a position substantially ?ush with said track means; a
hatch cover element for closing said opening and includ
ing a plurality of articulated sections foldable upon each
other, one of said sections being turnably mounted on
said supporting element, said hatch cover element being
movable between an inoperative position in which said
sections are folded upon each other and uncover said
bounded by a sealing hatch coaming portion, said sup
opening and an operative position in which said sections
are located in a plane and cover said opening, said hatch
cover element including a plurality of gaskets, each gasket
being secured to one of said sections and sealing said sec~
porting element including a resilient means having a sup
porting portion normally flush with said supporting face;
a hatch cover element for closing said opening and includ
ing a plurality of articulated sections foldable upon each
tions in said operative position, said gaskets having a
other, one of said sections being turnably mounted on 40 common sealing face cooperating with said sealing hatch
said supporting element, said hatch cover element being
coaming portion of said supporting element and being
movable between an inoperative position in which said
located opposite the same in said operative position of
sections are folded upon each other and uncover said
said hatch cover element; wheel means secured to another
opening and an operative position in which said sections
section of said hatch cover element and being in rolling
engagement with said supporting face of said supporting
element during movement between said positions for sup
porting said hatch cover element, said wheel means being
located on said supporting platform in said operative posi
are located in a plane and cover said opening, said hatch
cover element including a plurality of gaskets, each gasket
being secured to one of said sections and sealing said sec
tions in said operative position, said gaskets having a com—
mon sealing face cooperating with said sealing hatch
tion of said hatch cover element, said resilient means hav
coaming portion of said supporting element and being 50 ing a spring force greater than the weight of said hatch
located opposite the same in said operative position of
cover element, said platform resiliently supporting said
said hatch cover element; wheel means secured to another
wheel means and hatch cover element in a movable posi
section of said hatch cover element and being in rolling
tion in which said wheel means are ?ush with said track
engagement with said supporting face of said supporting
means for rolling on the same and in which said hatch
element during movement between said positions for sup 55 cover element is transversely spaced from said supporting
porting said hatch cover element, said wheel means being
element; and clamping means for moving said hatch cover
located on said supporting portion of said resilient means
element in said operative position thereof toward said sup
in said operative position of said hatch cover element,
porting element while said resilient means resiliently
said resilient means having a spring force greater than the
yields, and for holding said hatch cover element in a seal
weight of said hatch cover element and resiliently sup 60 ing position in which said sealing face of said gaskets is
porting said wheel means and hatch cover element in a
movable position in which said Wheel means are ?ush with
in sealing engagement with said sealing hatch coaming
portion and said gaskets are compressed, said resilient
means urging through said platform said hatch cover
said supporting face of said supporting means for rolling
on the same and in which said hatch cover element is
transversely spaced from said supporting element; and
clamping means for moving said hatch cover element in
said operative position thereof toward said supporting ele
ment while said resilient means resiliently yields, and for
holding said hatch cover element in a sealing position in
which said sealing face of said gaskets is in sealing engage
ment with said sealing portion and said gaskets are com
pressed, said resilient means urging said hatch cover
means upon release of said clamping means to said mov
able position.
means upon release of said clamping means to said mov
65
able position.
10. In aclosure arrangement, in combination, a support
ing element formed with an opening; a closure element
for closing said opening and being movable between an
inoperative position uncovering said opening, and an oper
70 ative position covering said opening; ?rst supporting
means mounted on said supporting element, and second
supporting means mounted on said closure element for
supporting the same for movement on said supporting ele
ment, said second supporting means being located on said
7. A hatch cover arrangement as set forth in claim 6, 75 ?rst supporting means when said closure element is in said
3,038,434
1l
12
porting means mounted on said closure element for sup
operative position, and moving along said supporting ele
porting the same for rolling movement on said supporting
element, said rotatable supporting means being located on
said platform means of said resilient supporting means
when said closure element is in said operative position,
and rolling along said supporting element during move
ment of said closure element between said positions, said
resilient supporting means resiliently supporting said clo
sure element in said operative position of said closure ele
ment during movement of said closure element between
said positions, at least one of said supporting means being
resilient and resiliently supporting said closure element in
said operative position of said closure element, said resili
ent supporting means having a spring force equal to at
least a major part of the weight of said closure element so
that said closure element is at least partly counter-bal
anced; and means for moving said closure element in said
operative position in a direction transverse to a horizontal 10 ment, said spring means having a spring force equal to a
major part of the weight of said closure element so that
plane.
said closure element is partly counterbalanced while rest
11. In a closure arrangement, in combination, a support
ing on said supporting element and on said resilient sup
ing element formed with an opening; a closure element
porting
means in said operative position; and means for
for closing said opening and being movable between an
moving said closure element in said operative position in
inoperative position uncovering said opening, and an oper
ative position covering said opening; resilient ?rst support
a direction transverse to a horizontal plane, said moving
means including operating means for raising said platform
ing means mounted on said supporting element, and rotat~
able second supporting means mounted on said closure
element for supporting the same for rolling movement on
means to move said closure element away from said sup
porting element until said platform means are located on
the level of said supporting element and said closure ele
ment is located spaced in vertical direction from said sup
said supporting element, said rotatable second Supporting
means being located on said ?rst supporting means
porting element.
when said closure element is in said operative posi
13. A closure arrangement as set forth in claim 12,
tion, and rolling along said supporting element during
wherein said operating means include manually turnable
movement of said closure element between said positions,
spindle means engaging said platform‘ means at
said resilient ?rst supporting means resiliently supporting 25 threaded
least for moving said closure element away from said sup
said closure element in said operative position of said clo
sure element, said resilient supporting means having a
spring force equal to at least a major part of the weight of
said closure element so that said closure element is at least
partly counterbalanced; and means for moving said clo
sure element in said operative position in a direction trans
verse to a horizontal plane.
12. In a closure arrangement, in combination, a sup
porting element formed with an opening; a closure ele
porting element.
14. A closure arrangement as set forth in claim 12,
wherein said supporting element is a substantially hori
30 zontal supporting plate means, and wherein said closure
element is a plate means extending parallel to said sup
porting plate means and moving parallel to the same dur
ment located above said supporting element for closing 35
ing movement between said positions thereot.
References Cited in the ?le of this patent
UNITED STATES PATENTS
said opening and being movable between an inoperative
position uncovering said opening, and an operative posi
tion covering said opening; resilient supporting means in
2,139,779
StrattOn ______________ __ Dec. 13, 1938
cluding spring means and platform means, and being
mounted on said supporting element, and rotatable sup
2,753,827
2,791,095
Sabin ________________ __ July 10, 1956
Mercier et al ___________ __ May 7, 1957
934,456
McGray _____________ __ Sept. 21, 1909
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