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Патент USA US3083875

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April 2, 1963
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w. VAN DER WERFF
3,083,860
HINGED COVERS FOR RECTANGULAR RECEPTACLES
Filed Oct. 25; 1960
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INVENTOR
WILLEM VAN DER 'WERFF
April 2, 1963
w. VAN DER WERFF
3,083,360
HINGED COVERS FOR RECTANGULAR RECEPTACLES
Filed Oct. 25. 1960
2 Sheets-Sheet 2
F'IG.4
INVENTOR
WI'LLEM VAN DER WERFF '
Apuzs
United States Patent 0 ” ice
2
1
3,083,860
HlNGED COVERS FDR RECTANGULAR
RECEPTACLES
Willem van der Werir', Haarlem, Netherlands, assignor to
Werltspoor N.V., Amsterdam, Netherlands, a company
of the Netherlands
Filed Get. 25, 196i), Ser. No. 64,817
Claims priority, application Netherlands Nov. 3, 1959
2 Claims. (Cl. v220—32)
3,683,869
ibatented Apr. 2, 1963
right arm 13 engaging the lug 7 of the cover. It the bell
crank lever 12 is rotated from the position shown in
MG. 3 to the position shown in FIG. 4 the cover slides
with its lugs 7 on the pivot axis 8, so that the cover is
disengaged from the edges 5 and 6 at the sealing face of
the receptacle.
For relieving the cover from the load of the counter~
weights an arm 14 is secured on the axis 3 and said arm
can be supported on a sleeve 15’ provided with inner
10 screw thread and united with a handwheel 16. Said
sleeve 15 is threaded on a rod 17 engaging the wall of
The invention relates to a hinged cover for a rectan
the receptacle at 18. For opening the cover the support
gular receptacle, said cover being pivoted about an axis
15, 17 of the arm 14 is withdrawn by rotating said sup
supported at the wall of the receptacle and having a
port away from the arm towards its dotted line position
clearance in the lugs of the cover, enabling the cover
to be displaced parallel to the sealing face of the re 15 in FIG. 2, so that now the weights 16 are set to operate on
the cover and displace and rotate the cover towards its
ceptacle for releasing the cover when opening it.
open position.
With receptacles which are subjected to high internal
What I claim is:
pressure it is required to press the cover properly on the
1. In combination a receptacle having an opening sur
receptacle and in order to rapidly open and close such
a cover closing means without using bolts has "been pro 20 rounded by a rectangular frame having a planar sealing
face and a hinged cover for sealing the face of said
posed, which however, are rather complicated.
opening, said cover being pivotable about an axle sup
The invention has for its object to obtain boltless clos
ported by the receptacle, lugs on said cover having open
ing means for a cover of the kind referred to which are of
ings through which said axle extends with clearance en
simple construction and easy to operate.
According to the invention the cover at opposite sides 25 abling the cover to be displaced parallel to the sealing
face of the receptacle opening, at least one pair of in
is provided with a longitudinal groove, one of said grooves
ter?tting longitudinal grooves and ribs substantially
being open towards the ‘outer side of the cover and the
parallel to said sealing face of the receptacle opening
other groove being open towards the inner side of the
-for locking the cover in sealing relation to the receptacle,
cover, the cover with said grooves being adapted to en
gage edges at the sealing face of the receptacle, at least 30 the groove of one pair being formed in one of said cover
and receptacle and the rib in the other, a bell crank lever
one hell crank lever being secured to the pivot axis of
secured to said axle, one arm of said lever engaging the
the cover, said lever engages the cover with one of its
cover and the other arm carrying a counterweight, a mov
arms and carries at its other arm a counterweight operat
able support pivoted on the receptacle to engage an arm
ing only in the direction for opening the cover and a
removable support being provided adapted to prevent ro 35 ?xed to said axle for taking up the load of the counter
weight when the cover is in closed, sealing position on the
tation of the pivot axis under the in?uence of the counter
receptacle and thereby preventing movement of the cover
from closed position, said bell crank lever and counter
In the accompanying drawing, in which an embodiment
weight being so disposed as to ?rst move the cover parallel
of the cover according to the invention is illustrated, FIG.
1 shows a plan view of the cover.
40 to the sealing face of the receptacle opening to disengage
said rib from the associated groove and then continue
FIGS. 2 and 3 each show a cross sectional view taken
the cover opening movement by swinging the cover in a
on line II—II and line IlI—III of FIG. 1 respectively
receptacle opening direction when said movable support
in which also a portion of the receptacle to be closed is
is turned to disengage the said arm of the axle and release
shown.
weight.
FIG. 4 is a similar view as FIG. 3 but with the cover 45 the counterweight.
2. The combination according to claim 1 wherein two
The cover 1 has grooves 2 and 3 at its opposite longi
pairs of longitudinal grooves and ribs are provided in said
tudinal sides and of which the groove 2 is open at the
cover and receptacle, said grooves being positioned at
outer side of the cover and the groove 3 is open at the
opposite sides of the periphery of the cover, and one of
inner side of the cover. The cover with said grooves 50 said longitudinal grooves opening outwardly and the
in released position.
2 and 3 may engage edges 5 and 6 at the upper face of
the receptacle 4.
The cover 1 with its lugs 7 is pivotable about an axis
8 rotatably supported at the wall of the receptacle and
the apertures 9 in said lugs are oblong so that the cover 55
has clearance on the pivot axis 8 and therefore, can
slide with respect to the axis in order to be released from
the edges 5 and 6 of the receptacle as shown in FIG. 4.
Two counterweights 10 are suspended on the pivot
axis 8 through the intermediary of a lever 11 and a bell
other groove opening inwardly of the cover.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,200,102
2,372,369
2,681,165
Holket ________________ __ Oct. 3, 1916
Ditch?eld ____________ __ Mar. 27, 1945
Kornhavser et al _______ __ June 15, 1954
2,685,983
Kelly ______________ __ Aug. 10, 1954
crank lever 1% secured 0.11 the Shaft and having its “a 60 ‘2,763,343
Downey et al. -ggg??gg Sept. 18, 19:56
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