U.S. patent number 3,827,182 [Application Number 05/286,054] was granted by the patent office on 1974-08-06 for device for automatic opening, respectively closing of a curved sliding door or similar with regard to a concentric opening.
This patent grant is currently assigned to Em. D'Hooge N.V., naamloze vennootschap. Invention is credited to Roger Joseph Victor Van Helleputte.
United States Patent |
3,827,182 |
Van Helleputte |
August 6, 1974 |
DEVICE FOR AUTOMATIC OPENING, RESPECTIVELY CLOSING OF A CURVED
SLIDING DOOR OR SIMILAR WITH REGARD TO A CONCENTRIC OPENING
Abstract
The invention pertains to a device for automatically opening and
closing a curved sliding door with respect to a concentric opening
in a fixed curved section, for instance a drum of a machine for
washing linen, wherein at least one pressure cylinder is fitted
between said sliding door and said fixed curved section, the
cylinder itself and its piston rod being concentrically disposed,
both with regard to said sliding door and with regard to said fixed
section.
Inventors: |
Van Helleputte; Roger Joseph
Victor (Gentbrugge, BE) |
Assignee: |
Em. D'Hooge N.V., naamloze
vennootschap (Ledeberg, BE)
|
Family
ID: |
25661671 |
Appl.
No.: |
05/286,054 |
Filed: |
September 5, 1972 |
Current U.S.
Class: |
49/40; 220/213;
49/41 |
Current CPC
Class: |
B63B
19/08 (20130101); E05F 15/50 (20150115); D06F
37/28 (20130101); E05F 15/57 (20150115); E05F
15/611 (20150115); B65D 90/582 (20130101); F15B
15/125 (20130101); E05Y 2900/514 (20130101); E05Y
2900/602 (20130101); E05Y 2900/312 (20130101) |
Current International
Class: |
E05F
15/12 (20060101); E05F 15/02 (20060101); D06F
37/00 (20060101); D06F 37/28 (20060101); B63B
19/08 (20060101); B65D 90/58 (20060101); B63B
19/00 (20060101); B65D 90/00 (20060101); F15B
15/00 (20060101); F15B 15/12 (20060101); E05F
15/00 (20060101); E05F 15/08 (20060101); E04b
003/34 () |
Field of
Search: |
;49/40,41 ;92/120
;220/41,35,36 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Taylor; Dennis L.
Attorney, Agent or Firm: Bacon & Thomas
Claims
What I claim is:
1. A device for opening and closing a curved sliding door on a
similarly curved wall of a vessel comprising:
a cylinder fixedly secured at its ends to each of opposite curved
edge portions of said door and being curved substantially
concentric to said wall of said vessel;
a piston rod in each cylinder, each piston rod being curved
correspondingly to its cylinder and extending sealingly and
slidably through opposite ends thereof;
means securing each end of each piston rod to said vessel wall;
a piston secured on each rod within its corresponding cylinder,
between the ends thereof; and
means for directing fluid pressure into each cylinder on either
side of the piston therein and for venting fluid pressure from the
other side of said piston.
2. A device as defined in claim 1 wherein said last-named means
comprise:
a longitudinal passageway within and extending inwardly from each
end of each piston rod to an inner terminus adjacent the piston
thereon; and lateral port means communicating each terminus with
the interior of said cylinder on one side of the piston therein.
Description
This invention concerns a device for automatic opening and closing
of curved doors, in particular for opening and closing curved
sliding doors to follow the curved wall of a container, a drum, a
vehicle body or similar.
We know various applications of doors, in particular curved doors,
where these doors must seal, for specific reasons, an opening in
the curved wall of a container, drum, vehicle or similar such as,
for instance, in washing machines for linen, shipping tanks,
airplane doors, etc.
Generally, such curved doors are operated simply by sliding said
door by hand into the desired positions in its guide fixtures and
along said curved wall.
Access to such doors is quite difficult in some specific cases and,
consequently, attempts were made to automatically move these doors
by mechanical means, for which purpose various chain systems, cable
systems and the like have already been used. However, none of the
solutions presented to this day showed efficient results.
This invention involves a device, by which such doors can be opened
and closed by completely automatic and remote control, while the
door can be moved to and held in any position with regard to the
door opening, the device itself being extremely simple and very
safe in operation.
This device consists, mainly, in fitting, between said sliding door
or similar and said fixed curved section, minimum one pressure
cylinder, the cylinder part and the piston rod of which will be
curved and installed concentrically with regard to said sliding
door and with regard to said fixed section.
For the purpose of showing the special features of the device
according to the invention, we detail hereinafter, as an example
and without any restriction, two preferred embodiments by referring
to the drawings hereto attached, in which:
FIG. 1 shows part of a radial section through a drum with an access
door fitted with a device according to the invention;
FIG. 2 is a view along arrow F.sub.2 in FIG. 1;
FIG. 3 is a view along arrow F.sub.3 in FIG. 1;
FIG. 4 is a sectional view according to line IV--IV in FIG. 3;
FIG. 5 is a view along arrow F.sub.5 in FIG. 1;
FIG. 6 shows a sectional view according to line IV--IV in FIG.
5;
FIG. 7 is a view along arrow F.sub.7 in FIG. 6;
FIG. 8 is a view along arrow F.sub.8 in FIG. 5;
FIG. 9 is a view similar to that of FIG. 1, but with said sliding
door in open position;
FIGS. 10 and 11 are both sectional views similar to FIGS. 1 and 9,
but illustrating a different embodiment;
FIG. 12 shows, as an example, a washing machine for linen, to which
the device according to the invention has been fitted.
FIGS. 1 to 9 show a curved wall 1 of a drum, container, vehicle
body or the like, in which an opening 2 can be sealed by means of a
sliding door 3, which door is curved according to a radius drawn
from the same centre as the local outline of components 1.
This door can be opened, or closed, by moving the door along the
outline of component 1, for which purpose this door will slide in
guides 4 and 5 attached to the wall of component 1.
In accordance with this invention, said sliding door 3 will be
connected in an appropriate manner with at least one device 6
according to the invention. As shown by the example and by
preference, we provide for two such devices 6, one at each side of
said door, for the purpose of fully freeing said opening 2 and for
the purpose of opening sliding door 3 without torsional strain.
Each device 6 will in that case, consists of a cylinder body 7
concentrically curved with said door 3, and in which cylinder is a
piston 8 fitted, at each end with piston rods 9 and 10.
At each outer end, said cylinder 7 is slidable on the piston rods 9
and 10 by means of an appropriate gasket 11, in which arrangement
both components 10 of the two devices 6 are linked together in an
appropriate manner by means of a rod 12 that passes through two
lugs 13 and 14 attached to said sliding door 3. In this case, said
rod 12 will pass through oblong holes 15 provided for in supports
13 and 14 for the purpose of allowing radial motion of the door
with regard to component 1; this is necessary in some cases, for
instance when the design involves a container or similar 1 that
must be sealed air-tight and water-tight by means of said door 3,
and in which we use, after having moved the door 3 in position with
regard to opening 2, known hydraulic or pneumatic gasket systems
fitted to the outline of sliding door 3, and which systems will be
inflated at that moment.
Said piston rods 9 and 10 are attached at each end, by means of an
appropriate support 16, to the outer wall of component 1.
As clearly shown by the drawings heretoattached, it will suffice to
bring pressure to one or the other side of said piston 8 in order
to move cylinder 7 along the guiding piston rods 9 and 10 and thus
either open or close said sliding door 3.
This arrangement provides a very simple, low cost and very safe
automatic system capable of remote control for the purpose of
opening or closing said sliding door 3. This device is all the more
interesting when, for instance, sliding doors are involved that are
installed at great heights, or in places of difficult access and,
in some cases, offering access only after having disassembled part
of a specific machine.
In order to avoid using flexible feed and discharge lines for the
pressure fluid, said piston rods 9 and 10 are hollow in this
design, in which each piston rod is connected at its end that
passes through a support 16 and is hereto-attached, with lines 17
and 18 while, in order to admit the fluid to the cylinder, and to
remove said fluid from the cylinder, each piston rod 9 and 10 is
provided with, adjacent the piston 8, with a small hole 19 or
20.
The ends 11 of cylinder 7 extend into a body 21, into which has
been fitted a gasket ring 22 and a compressing part 23 that bears
on a gasket 24.
Piston 8 consists of a body with end taps 25 and 26 to which the
free ends of piston rods 25 and 26 are fitted, threaded parts 27
and 28 and two cylindrical parts 29 and 30 separated one from
another by a cylindrical part 31 of larger diameter. On each side
of part 31 are fitted rings, respectively 32 and 33, made, for
instance of self-lubricating synthetic material, which will result,
first, in extremely low friction and practically no wear and,
second, in insuring that part 31 which has an outer diameter
somewhat smaller than the inner diameter of cylinder body 7 will
not make metal and metal contact with the cylinder. The seal itself
of piston 8 with regard to cylinder wall 7 is achieved by means of
rings with flanged lateral edges, 34 and 35, made, for instance, of
synthetic material and fitted against said rings 32 and 33, in
which will cooperate, with each of said rings 34 and 35,
compressing rings 36 and 37, which compressing rings will, in their
turn, be compressed by nuts, 38 and 39, that cooperate with said
threaded parts 27 and 28.
In this manner, we achieve a very simple and operationally safe
device.
Obviously, the construction of said end parts 11 as well as of said
piston 8 may be of any other design without exceeding the limits of
the invention.
FIGS. 10 and 11 schematically show an embodiment, in which cylinder
7 is firmly attached to the outer wall of component 1 and in which
it is piston rod 40 that is attached at one end 41 to said sliding
door 3, while the other end of said piston rod 40 is provided with
an appropriate piston 42. In this case, the pressure fluid feed may
be achieved directly along cylinder 7 and, by preference, by means
of lines 43 and 44.
FIG. 12, shows as an example, a large capacity linen washing
machine for industrial purposes, in which the outer fixed drum 46
is provided, with an opening at its lower part, which opening can
normally be sealed by a door 3 that can be opened and closed by
means of devices 6 such as detailed hereabove.
This invention is by no means restricted to the designs shown by
the drawings hereto-attached and to be understood as examples, and
such a device may be embodied in other shapes and measurements
without exceeding the limits of this invention.
* * * * *