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Патент USA US3043267

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July 10, 1962
B. S. APPLETON ETAL
3,043,257
FLUSH DECK HATCH COVERS
Filed Aug. 8, 1957
6 Sheets-Sheet 1
"4
,
I'Tyzl
11v VENTO/PS
BY BEE/VA RD 5/] PPLETON. -
7
.
ATTORNEYS.
July 10, 1962
B. s. APPLETON ETAL
3,043,257
FLUSH DECK HATCH COVERS
Filed Aug. 8, 1957
6 Sheets-Sheet 2
'
gb
INVENTORS.
BERN/I RD 5/! PPLETON,
J4 MES JJEN/(1N3.
July 10,1962
B. s. APPLETON ETAL
$043,257
FLUSH DECK HATCH COVERS
Filed Aug. 8, 1957
6 Sheets-Sheet 3
INVENTORS.
BE/PA/A R0 5: APPLETON.
B1g2: MES J JEN/(l NS.
A TTOE/VEYF.
July 10, 1962
B. s. APPLETON ETAL
3,043,257
FLUSH DECK HATCH COVERS
Filed Aug. 8, 1957
6 Sheets-Sheet 4
JQN
5
“J
5L3M2NLK2%R05(WM.
E
July 10, 1962
B. s. APPLETON ETAL
3,043,257
FLUSH DECK HATCH COVERS
Filed Aug. 8, 1957
6 Sheets-Sheet 5
..
INVENTORS.
BEE/VA RD jAPPL ETOIV.
5474 M55 JJENK/NS.
a?mmqm
ATTORNEYS‘.
"
v
rates
3,043,257
t
Patented July '10, 1 962
1
2
FIG. 6 is a detail transverse sectional view taken along
line 6-6 of FIG. 1,
.FIG. 7 is a sectional view taken along line 7-7 of
3,043,257
FLUSH DECK HATCH COVERS
Bernard S. Appleton, Woodmere, and James J. Jenkins,
Babylon, N.Y., assignors to G.M.E. Corporation, Chi
FIG. 1,
.
FIG. 8 is a sectional view taken along line 8-8 of
cago, Ill., a corporation of New York
FIG. 7,
Filed Aug. 8, 1957, Ser. No. 677,044
4 Claims. (Cl. 114-202)
FIG. 9 is a sectional view taken along line 9-9 of
FIG. 1,
This invention relates to the art of hatch covers, and
FIG. 10 is a view similar to FIG. 9 on an enlarged’
more particularly to a hatch cover, that when closed will 10 scale to show the sealing gaskets,
be ?ush with the level of the deck through which the
FIG.
11-11
FIG.
FIG.
FIG.
FIG.
FIG.
FIG.
FIG.
hatchway extends.
As conducive to an understanding of the invention it is
noted that where marine hatch covers comprise a plurality
of substantially rectangular panels which are mounted
on -a coaming extending above the deck level around the
periphery of the hatchway, such arrangement would inter
fere with free movement of personnel as well as that of
tractor or fork lifts required to shift cargo, which is espe
cially undesirable where the hatch cover is on a deck be
low the top deck of a ship not readily accessible to the
11 is a detail sectional view taken along line
of FIG. 1,
12 is a view taken along line 12-12 of FIG. 1,
13 is a view taken along line 13-13 of FIG. 12,
14 is a view taken along line 14-14 of FIG. 12,
15 is a view taken valong line 15-15 of FIG. 1,
16 is a view taken along line 16-16 of FIG. 15,
17 is a view taken along line 17-17 of FIG. 15,
18 is a view taken along line 18-18 of FIG. 16,
and
'
FIG. 19 is a side elevational view showing the panels
in open position.
ship’s boom ‘for movement of cargo.
Where the hatch cover when in closed, substantially
horizontal position, is ?ush with the deck and there are
spaces or gaps of excessive width between the periphery
of the hatchway and the periphery of the hatch cover, the
Referring now to the drawings, as shown in FIGS. 1
and 2, the reference numeral 21 refers to the deck of a
or jamming of the wheels of tractors or fork lifts required
ship which has a substantially rectangular hatchway 22
designed to be closed by two pairs of hatch cover panels
A—1, A-2 and B—1, B-Z.
Depending from the deck 21 along the side edges 23
to move cargo.
(FIG. 6) and end edges 24, 24' (FIGS. 2 and 3) féspec
spaces or gaps may cause tripping of the crew members
Where, in order to retain the closed hatch cover in 3 O tively of the hatchway 22 are supporting girders 25, 26
locked position with respect to the hatchway, latches are
provided‘ which are positioned exteriorly of the hatch
cover and protrude above the top surface thereof, the
difliculties of free movements of personnel, tractors and
fork lifts are also present.
.
Where the hatch cover is provided with gaskets to ef
fect a watertight seal and in movement of the hatch
covers from closed to open position, the seal is subjected
and 26'. Extending laterally inward from each of the
side girders 2'5, as shown in FIG. 6, adjacent the lower
edges thereof, are elongated rigid members 29 which de
?ne supports for the hatch cover panels. Each of the
3 01 members 29 has a guide rail or track 31 mounted thereon
adjacent its inner edge and extending the length thereof.
In addition, the end girder 26 (FIG. 2) also mounts an
elongated rigid supporting member 32 which extends
. to abrasion, it may quickly wear out with resultant im
pairment of the watertight security of the hatchway.
It is accordingly among the objects of the invention
40
v
To support the hatch cover panels so that in ‘closed
horizontal position they will lie in side by side relation
to provide a hatch cover that is relatively simple to install
and which, when in closed position, will have its top sur
face substantially ?ush with the deck of the ship with sub
stantially no protruding portions and with no excessive 4
clearance between the periphery of the cover and the
periphery of the-hatchway in the deck, which might cause
transversely across the hatchway 22.
transversely across the hatchway, each of the end por
tions 33 of the panels has a depending skirt plate 34 (FIG.
6) positioned inwardly thereof and the side portion35
(FIG. 2) of the panel A-I, has a depending skirt plate
36 positioned inwardly thereof.
Each of the skirt plates 34, 36, at its lower edge mounts
tripping of crew members or jamming of the wheels of a
an angle member 37 which extends outwardly therefrom.
tractor or fork lift, which hatch cover may securely be 50 The angle members 37 on skirt plates 34 and 36 are de
locked in closed position without any latches or locks
signed to rest on track 31 as shown in FIG. 6, and mem
ber 32, as shown in FIG. 2. The ‘angle members 37 are
protruding above the deck or the hatch cover, and which,
when in closed position will effect watertight security for
such hatchway and with but a simple manipulation by
so mounted that when supporting the panels in horizon
tal position, as shown in FIGS. 2 and 6, the top surface
even a relatively unskilled crew member and without 55 38 of the panels, which desirably are covered with suitable
undue effort on his part, may readily and rapidly M
moved from closed to open position and vice versa, with
out likelihood of injury to the seal providing such water
tight security.
In the accompanying drawings in which are shown one
or more of various possible embodiments of the several
features of the invention,
'
FIG. 1 is a plan view of the hatch cover,
FIG. 2 is a longitudinal sectional view taken along line
2-2 of FIG. 1,
'
FIG. 3 is a detail sectional view taken along line 3-3
of FIG. 1,
‘
FIG. 4 is a sectional view taken along line 4-4 of
FIG. 3,
_
r
"
FIG. 5 is a sectional view taken along line 5-5 of
FIG. 3,
'
*
planking 39 as is the deck 21, willbe in the same horizon
tal plane as the deck,
As shown in FIG. 3, the side portion 41 of the panel
B—2 also has a depending skirt plate 42 positioned in
wardly thereof which mounts a pair of substantially L
shaped hinge members 43 equidistantly spaced from the
ends 33 of panel B-2 as shown in FIG. 1.
'
To this end the end 44 of the 'leg 45 of each hinge
member 43 is a?ixed to plate 42 and extends laterally
outward therefrom beyond the side portion 41 of panel
13-2 so that it will extend inwardly of the associated end
’ edge 24" of the hatchway. The leg 46 of each hinge
member 43 extends ‘at substantially right angles to leg
45 and the free end of each of the legs 46 is pivotally
70 connected as at 47 to an associated bracket 48 a?ixed to
transverse girder 26'.
With the construction ‘thus far described, whenwthel'
3,043,257
To this end, as shown in FIGSJl, 7 and 19, a?ixed
panels are in closed horizontal position, as shown in
7 FIGS. 2, 3 and 6, the end portion 33v of the panels will
to each of'the ends 33 of panel A-2 adjacent its side .
edge 51 is an arm 87, which, when the panels are in
be closely adjacent the side edges 23 of the hatchway,
‘and the side portions 35, 41 of the panels A-l, 3-2 will
be closely adjacent the ends 24, 24’ of the hatchway
closed horizontal position shown in FIGS. 1 andp7, will
extend beyond'the side edge '52 of panel B—1,'the free
end of each arm 87 mounting a roller 88 adapted to ride
on the side tracks 31.
' A?ixed to each of the ends 33 of panel A-l adjacent
its side edge 35 is an arm 91 which extends toward said
The adjacent side edges 51, 52 (FIG. 1)' of panels
A-2, B4 are connected as by hinges 53 on their top sur-' 10 edge 35 and mounts a roller 92 ‘at its free end.
As shown in FIG. 12, each of the tracks 31 terminates
faces. To accommodate the hinges, as shown in FIG. 11,
near the edge 24 of the hatchway and a lever 93 which
a the portions of panels A-2, B—1 adjacent their edges 51,
forms an extension of said track 31 is pivoted at one end
52 have substantially rectangular recesses 54 in each of
‘ as at 94 adjacent the end 95 of track 31. The free end
V which is secured one of the plates 55 of the hinge 53.
so that there will be no wide gap that might cause tripping '
of a crew member or jamming of the Wheels of a tractor
or fork lift.
The adjacent edges 61, 62 and 63, 64 of panels A-l,
A-2 and B-1, B-2 respectively arehinged together on
96 of the lever has connected thereto one end of a hy
draulic jack 97 which, when actuated, will pivotthe lever
from the inclined position shown in full. lines to hori
their undersurface in the manner shown in Reissue Patent
zontal position shown in broken lines so as to lie in the
As such hinge connection and associated actuating ' ' same plane as track 31. The roller ‘92 is designed to- rest
means is clearly shown in said reissue patent and per‘ se 20 on lever 93 when the panels are in closed position and
,
No. 24,238.
forms no part of this invention, it will be but brie?y
described with respect to panels A-1, A-2 as the asso
ciated structure for panels B-l, B-2 is identical.
Referring toFIGS. 2 and 9, the panelsA-l, A—2 are
with the levers in retracted or inclined position, the por
tions 81 of the gasket at the end 35 of panelA-l will
Vrest'on the associated sealing rail 83.
Means are provided 'releasably to retain the hatch
cover panels in closed position with the gaskets in engage
ment with the scaling’ rails. To this end, a plurality of
locking means are provided positioned along the ends of
the panels A—1, A-2 and B-1, B—2 and along the side
edges 35, 41 of the panels A-l', B—2.'
In the embodiment herein shown, eachof the locking
provided with a reaction'member 66, pivoted on the axis
67 of hinge 68 ,af?xedr as at 69 to the panels A-1, A-Z.
Pivotally connected as at 71 to each of the opposed corners ,
of the member 66 is one end of'a suitable hydraulic jack
72, the other end of which is pivotally connected as at
73 to a transverse girder 74 of panels A-l, A-2, to move
the panels between the closed position shown in FIG. 2
means comprises a sleeve or housing 101 (FIG. 15) de
pending from the top surface 38 of the panels and a?ixed
thereto as by welding at 102. The bore 103 of the hous
ing 101 is of enlarged diameter vat its upper end de?ning
an internal annular shoulder 104 on which is seated the
?ange 105 of a bushing 106 which extends to the lower
. to the open position shown in FIG. 19 in the manner de
scribed in said reissue patent, upon, actuation of the
jacks
72.‘
'
r
'
V
v ' Means are provided to atlorda watertight seal between
the hatch cover panels and the hatchway.
To'this end, a gasket extends around the periphery
end of the housing 101.
of each ofthe panels below the top surface 38 thereof.
The portion 81 of the gasket ‘along each of the ends 33
has a head 108 that seats on huge 105. The head 108
has’ a peripheral groove 109 in which. an O'ring' 111 is
of .the‘panels' (FIG. 6) is held between retaining strips
82 depending from said ends 33 and is designed to seat
positioned to provide a seal to prevent leakage therepast.
The head 108 which is ?ush with the top surface 38 of the
on a ‘sealing rail 83 a?ixed’to side girders 25 above mem
ber 29 1and extending laterally inward from said girder.
The portions 81' of the gasket along the edge 41 (FIG.
3) of panel B-2 and the edge 35 of panel A51‘ (FIG. 12)
panel has a' recess 112 to receive a suitable ‘tool 113 to
rotate the rod 107 to eifect locking and unlocking in the
manner hereinafter described.
., 'is also held'between retaining strips 82. depending from
said edges 41 and 35.
I
>
Extending through the bushing 106 is a rod 107 which
V
The gasket portion 81' on edge 41 seats on a sealing
rail 84 extending laterally inward from a skirt 85 de
pending from said edge 41 over hinge member 43. The gasket portion 81', on edge 35 seats on a sealing rail 84'
, extending laterally inward from girder 26 (FIG. 12).
JAs, the gasket portions 81, 81’ along the ends 33 of the
'
‘
'
'
The lower end of rod 107 extends through an opening
116 in one end of locking arm 117,.the latter'being se
cured to rod 107 as by set screw 118. Theouter end
119 of arm 117 has an axial bore 121 in which is po-'
sitioned ‘a stud shaft 122 which mounts a roller 123 at
its outer end,.the shaft being retained in the bore as by
set screw 124.
'
,
'
panels and along the edges 35, 41 thereof rest on the
associated sealing rail 83, 84', 84 and are spaced from the
associated girder 25, 26 andskirt 85 (FIGS. 6, 12 and 3
Extending inwardly from ‘the outer end of the rod 107
is an axial bore 125 which is in communication through
transverse bore 126 with the. periphery of said rod. In
addition, the shaft 122 has an axial bore 127 which ex
respectively), a gutter G is de?ned which has an asso
tends from the roller 123 to a’ bore 128 in arm 117 in
ciated duct (not shown) for discharge of water collected
communication with a transverse bore 129 leading into the
axial bore 125. Thus, when grease is forced into the
: therein. As 1a result, the head of water pressure against
the gasket will be minimized to prevent leakage past such .60 axial bore 125,_it will lubricate the rod 107 and the
gaskets.
'
~
'
roller 123.
'
The portions 81" of the gasket between panels A-2, B-l ,
(:FIGJII) andA-l, A-z; B-l, B-2 (FIGS. 9 and 10)
i are a?ixed to the associated edges 51, 52 and 61, 62; 63, v
. 64 ‘so that they may engage laterally asshown when the
panels are in closed horizontal position to provide a seal.
‘Each of, the portions '81" has'a gutter SS’there‘beneath ~
to collect any
that may leak past: the Vengagedgasket
7
portions.
‘Means are; provided to move the portions 81 of the“
gaskets adjacent the edges 35 of panel.A—1 and'the edges
'51, 52 of panels A-2, B~1 away vfrom the associated
sealing rail 83jp'rior'to’movement of the panels to open
positionso that said portions‘ 81 will not rub against the’
V
83 with resultant injury to the gaskets. ~
.
'
The roller 123‘ on each of the-rods 107 is designed
to coact with an associated locking conformation mounted
on the sealing
v83 as shown in FIG. 15. Each lock
ing conformation comprises a wedge-shaped member 131
' located along the rail 83st: ‘that it will be aligned with
the associated roller when the-panels are in closed posi
tion; As is clearly shown in FIG. 17, "the wedge 131 (is
a?ixed to the undersurface of the rail 83 and has ‘a doWn-'
70 wardly inclined
portion 132 along which the roller 123
will ride when the rod 107 is rotated, to draw the hatch
cOver panel downwardly so that the'gasket will engage
the sealing rail to effect a watertight seal.
.
,'
The'wedge 131 also has -an_ upwardly inclined portion
75 133 over which the'roller will ride near, the end of its
3,043,257 ‘
5
6
locking movement so that the arm 117 and hence rod 107
will be restrained from movement to retain the panels
B-l will be lowered until the associated portions of the
gaskets rest on the sealing rail without any rubbing action
securely yet releasably locked.
having been imparted thereto.
To retain the arm 117 in open position, a spring arm
134 is provided which will engage the roller 123 when
the arm 117 is rotated so that it extends substantially
parallel to girder 25 as shown in broken lines in FIG. 16.
When the panels A-l, A-2 have moved to closed hori
zontal position such as shown in FIG. 12, the rollers 92
will be resting on the upwardly pivoted levers 93 so'that
the portion 81, 81’ of the gaskets adjacent edge 35 of
panel A-1 will be clear of the associated sealing rails.
Hence, no rubbing action will have been imparted to such
In the operation of the unit with the panels in closed
horizontal position, as shown in FIGS. 1 and 2, and with '
the latches in locked position having their rollers 123 cu
gaging the ‘portion 133 of the wedges 131, each of the
rods 107 is rotated by a suitable tool 113 inserted into
the recess 112 in the upper end thereof.
As a result, each of the rollers 123 will ride down the
10
gaskets.
‘
At this time, the jacks 97 are actuated to pivot the
levers 93 downwardly to the position shown in full lines
in FIG. 12 so that the gaskets adjacent edge 35 of panel
A-l will rest against the associated sealing rail to pro
inclined portion 132 of the wedge 131 and be moved clear 15 vide a dependable seal.
thereof and then will snap beneath the associated resilient
The rods 107 of the latches are ‘then rotated so that
retaining arms 134 (FIG. 16).
the roller 123 thereon will ride down the inclined por
To open the hatch cover, the jacks 97 (FIG. 12) ‘ad
tion 132 of wedge 131 (FIG. 17) drawing the panels
jacent the edge 35 of panel A-l are operated. As a re
downwardly and then the rollers 123 will ride into
Sult, the levers 93 will be lifted thereby reacting against
portion 133 of the wedge releasably'to retain the rollers
the’rollers 92 to raise the edge 35 of panel A-1 so that
and hence the latches in locked position.
the transverse gasket portion 81’ on rail 84' (FIG. 12)
With the construction above described, a hatch cover
and the portion of gasket 81 adjacent edge 35 will be
is provided that will, when in closed position, ‘he sub
moved clear of rails 84' and 83 (FIG. 14).
stantially ?ush with the deck of the ship. As the edges
The hydraulic jacks 72 associated with panels A-1,
35 and 51, 52 of the panels are lifted prior to folding
A-2 are then actuated. As the edge 51 of panel A-2 is
movement of the panels to open position and are re
‘held by panel B-l, restraining the panel A-2 from hori
tained in such lifted position until the panels have been
zontal movement,‘ in the manner described in said Reissue
moved back to closed position, no rubbing action to the
Patent No. 24,238, an upward component of force will
gaskets with resultant failure thereof will occur.
be created which will cause the panels A-1, A~2 to fold 30
As the main hinge for panel B-2, the hydraulic actu
together about the pivot 67. This will cause the edge 35
ators 72 and ‘97 and associated mechanism are below
of panel A~1 to move to the right from the position
the gaskets, they will be protected from the effects of the
shown in FIG. 2 and as the portions of the gasket adjacent
Water and sea air when the hatch cover is closed.
said edge 35 have been lifted from the associated sealing
Although in the illustrative embodiment shown, two
rail as previously described, no rubbing action will occur
to the gaskets and the rollers 92 will ride along levers
pairs of panels are provided, it is of course to be under
stood that it is within the scope of the invention to use
93 and thence along tracks 31.
one or. more pairs of panels arranged as described.
As a result of the folding movement of panels A-l,
As the latches depend from the top surface 38 of the'
A-2, the panel A-2 will pivot in a clockwise direction
hatch cover panels and there are substantially no elements‘
about the hinge 53 from the position shown in FIG. 7. 40 protruding above the panels or the deck, there is no ob
This will create a downward component of force on the
roller bearing ends of arms 87 and as the rollers 88 ride
on track 31 and cannot move downwardly, the edges 51,
52 of panels A-2 and B-1 will be lifted to move the por- ’
struction to tree movement of personnel or equipment.
'By-reason of the hinge arrangement for the edge 41
of panel B-Z, when the panel is in closed position, the
edge 41 of the panel and the end 24 of the hatchway
tions 81 of the gaskets adjacent said edges 51, 52 away
will be in juxtaposition so there is no wide gap which
from the sealing rail 83.
might cause tripping of a crew member or jamming of
Thereupon, the hydraulic jacks 72 associated with
the wheels of movable equipment.
panels B—1, B-2 are actuated and these panels will also
By reason of the sealing and latching arrangement as
fold together about their pivot 67. As the panel B-2 is
well as the drainage of water collected in gutters G, above
restrained from horizontal movement by its hinge con 50 described, there is no need for a raised coaming above
nection 47 (FIG. 3), the panel B—1 will move to the right
the deck of the ship which permits the flush type ar
dragging the folded panels A-l, A-2 in this direction
rangement of the present‘invention.
until all the panels are in substantially vertical position
The e?ectiveness of the sealing and latching arrange
as shown in FIG. 19.
'As the portions of the gasket adjacent edges 51, 52
of panels A-2, B-l have ‘been lifted from the associated
sealing rails as previously described, no rubbing action
Will occur to the gaskets and the rollers 88 will ride along
tracks 31.
ment above described, permits the hatch cover to serve
as a watertight partition whether'on the top deck or
between decks. Hence, if water should ?ood one hold
of a ship, the hatch cover will prevent ?ow of water into
another hold on another deck to maintain the overall
watertight security of the ship. The, effective sealing
In the movement of the covers to closed position, the 60 action will also serve to isolate ?re and ‘fumes.
hydraulic jacks are actuated in reverse order to that pre
As many changes could be made in the above con- i
viously described. Thus, the jacks 72 associated with
panels B-l, B-2 are ?rst actuated to move these panels
to the left until the panels B-l, B—2 are in closed sub
struction, and many apparently widely different embodi
ments of this invention could be made without depart
ing from the scope of the claims, it is intended that all
stantially horizontal position at which time the panels 65 matter contained in the above description or shown in
A-l, A—2 will be in vertical position and moved to the
the accompanying drawings shall be interpreted as illus
left. Since the arms 87 will be in vertical position at
trative and not in a limiting sense.
'
this time, the edges 51, 52 of panels A-2, B-l will still
Having thus described our invention, what we claim
be lifted so that the closing movement of panels B-l, B-2
as new and‘desire to secure by Letters Patent of» the
will not cause rubbing of the gaskets.
United States is:
.
Thereupon, the jacks 72 associated with panels A-1,
A-2 are actuated to move said panels to closed horizontal
position. This movement will cause an upward com
1. A hatch cover installation for a hatchway in the
deck of a ship, comprising a pair of panels adapted to
extend over such hatchway, said panels lying in side by
ponent of force to be applied to the roller bearing ends
side relation in substantially a horizontal planewhen in
of arms 87 so that the edges 51, 52 of the panels A-2, 75 closed position, a pivotal mount ‘for one of said panels
a,oas,257 -
7
position, ‘means pivotally connecting adjacent edges ‘ of
located beneath the deck of the ship at one end of the‘
' hatchway and positioned inwardly of the associated edge
of said hatchway, a pivot arm ai?xed at one end to one
said second pair of panels ‘for, upward folding movement
thereof between open andclosed position, meansrpiv
otally connecting adjacent edges of said two pairs of
panels, means to guide the'free edge of the outermost
panel of’v the second pair of panels in substantially a
of the panels inwardly of its outer edge and below the
1 top surface, thereof and pivotallyrconnected at its free
end to'said pivotal mount formovement of said panel
horizontal plane and means to eifect movement of the
through, an arc of substantially 90 degrees, means piv
otally connecting the adjacent edges of said panels for ‘ guided edge of said outermost panel-away, from the
sealing rail.
,
,
upward ‘folding movement thereof between open and
closed position, means to guide the oppositeedge ofgthe 10 , 4. The combination set forth in claim 3 in which the
other of said panels in substantially a horizontal plane,
means to guide the panels in substantially a‘ horizontal
a support depending‘ from the deck, positioned inwardly
of ,the periphery of the hatchway, a ledge carried by said
' plane comprises atrack on each side of the hatchway
'support beneath the upper edge thereof, means carried
' rail, the means to eifect movement of the guided edge of
by said panels below the top surface thereof inwardly
positioned in a horizontal plane below that of the sealing
15
of their peripheries adapted ‘to seat on said ledge to re
, tain the panels when ‘in closed position with thell‘lOP
the other of said panels of the ?rst pair of panels com
prises a pair of arms a?ixed- atone end to each of the
ends of the ?rst panel of the second; pair of panels and
extending outwardly therefrom aligned lwith the track,
surfaces substantially ?ush with the deck, a sealing rail
said arms extending beyond the edgepof the adjacent
panel of said ?rst pair and a roller at each of the, free
rigidly mounted with respect to the deck positioned at
each side and-at each end of the hatchway between said
ledge and the upper ‘edge of said support, a gasket
, mounted on said panels adjacent the peripheries thereof
ends of said arms adapted to ride on each of ‘said tracks.
References’ Cited in, thetile of'this patent ' -
and below the top surface thereof adapted to seat on said
sealing rails when the panels are closed and means to
UNITED STATES PATENTS
effect movement of the guided edge of said panel away 25 2,045,083
from said sealing rail.
'
a
V
,
2. ,The combination set forth in claim-1 in \which said
2,394,784
pivot- arm has two portions, onerof which isa?‘ixed to
the panel and extends outwardly therefrom in a plane
substantially parallel to theplane of the'top surface of
30
the panel and the otherof which extends in a plane at
substantial-1y right angles to the plane of the panel and
is pivotally'connected at its free- end so as to depend
from the pivotal mount when the panels are in closed
'
position.’
~
,
,
a
,Illig __._V_'_'___._.._'___‘____ June 23, 1936
Cochran ____,___'_.__,__'___‘ June 25, 1940
2,205,845
35
3. The combination set vforth in claim 1 in which a
second pair of panels is provided adapted to- extend over
such hatchway, all of said panels lying in side by side re
lation in substantially a horizontal plane when in closed I
,
Kelly ______________ __ Feb. 12, 1946
2,595,248
2,655,889
2,674,967
Greer et al; __________ __, May 6, 1952
Jernstrom _______ _;___ Oct.'20, 1953
Bich et a1. __________ __ Apr. 13, 1954
2,707,928
2,726,623
2,739,343
Farrell ____ __‘ _______ __ May 10,‘ 1955
Jernstrom __________ __ Dec. '13, 1955
______________ .__ ‘Mar. 27, 1956
‘2,791,095
Mercier et al. ________ __ May' 7, 1957
2,831,449
2,857,874
2,869,501
Suderow, ____________ __ Apr. 22, 1958
McBride ____________ _. 'Oct.,28, 1958
VStransky ____________ __ Ian. 20, 17959
2,917,017
Stransky ___> _________ __ Dec. 15‘, 1959
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