A Device for Operating an Outside Opening Window with or Without Mounted Meshwork Structure (Indian Patent 250411)

FIELD OF INVENTION
The invention generally relates to a device for smooth operation of outside opening
windows, from inside, with or without permanently fixed meshwork on it. More
particularly, the invention relates to an improved device for opening and/or closing of
an outside opening window form inside the window having permanently mounted with
or without meshwork structure.

BACKGROUND OF INVENTION
Windows are integral part of any premises to allow access to light, fresh air and outside
viewing. Simultaneously, the windows often provide entry to the undesired creatures
like mosquitoes and other insects, which are not only irritating to the inhabitants but
also carry germs for serious diseases like malaria, dengue fever and like. The most
effective safeguard from such threats is to permanently fix some kind of meshwork, like
wire mesh or nylon netting on the windows. But it becomes very difficult to operate the
windows when fixed with similar structures. The reason being that most windows are
configured to have outside opening arrangement due to space constraints, convenience
and further to economize the room-space. Under such circumstances, windows when
provided with wire-mesh structures causes unsurmountable difficulties to the users
while reaching and/or operating the shutters or doors of such windows.
A prior Great Britain Patent No. GB 2251855A entitled "Window Stay" which discloses a
teaching of a window stay restricts opening of a hinged window leaf by providing an
arm connected between the window and a fixed frame. At one end, the arm (11) is
connected to a slide (12) which runs in a channel (10) as the window is opened and
closed and which engages a stop (19) to limit the opening movement of the window.
The slide can be rotated relative to the channel to a position in which it can be
disengaged from the channel to allow the arm to be disengaged from the channel so
permitting unrestricted opening of the window in, for example, an emergency.

Another Great Britain Patent No. 2435766A entitled "Stay with movable pivots" which
discloses a teaching of a stay (10) comprising a frame member (18), a sash member
(12), a first and second intermediate members pivotally connected to the frame
member and the sash member. The second intermediate member (26) is pivotally
connected to the first intermediate member (24). The sash member (12) is pivotally
connected to the second intermediate member (26) at a position between the pivotal
connections of the second intermediate member (26) to the frame member (18) and
the first intermediate member (24). The position of the pivotal connection between the
frame member and one of the intermediate members (28) is movable relative to the
frame member. The position of the pivotal connection between the sash member and
the second intermediate member (36) is movable relative to the second intermediate
member as the sash member moves relative to the frame member. The frame member
(18) may be a track. Curved slot (62) may allow the motion of the sash to be modified.
The arrangement of the stay may ensure that seals are not trapped, or to
accommodate different sash or frame profiles.

A further Great Britain Patent No. 622392 entitled "Improvements in or relating to
Window Stays and like Devices" which discloses a teaching of a window stay or like
device comprising two members adapted to make sliding engagement with each other
and adapted respectively to be attached to a window and to a still or frame for a
window, one of said members having an eccentrically mounted locking device serving
upon rotation to be positively engaged with or disengaged from a series of locking
surfaces extending transversely of said other member.

The above three cited documents have following disadvantages:
The existing window operating devices, generally called "Window Stay", are clumsy and
inconvenient to use. It requires the user to grip the window shutter by taking out his
hand across the window to bring the door of the window to desired position and then
engage the window stay. It becomes further difficult when wire mesh or net is fixed on
the window having provided with window-stay device. The user has to then discard the
outside-opening windows shutter and opt for an inside-opening window, thereby
sacrificing space economy and convenience. Alternatively, some users adapt a clumsy
arrangement of having one small window-like opening on the meshwork for access to
every window shutter which indeed defeats the basic purpose of putting the wire mesh
or met in the window. Because the opening on the wire-mesh fails to effectively prevent
entry of unwarranted creatures inside the room through the window neither makes the
job of accessing and operating the shutters any easier. As a result, most people prefer
to curtail the expenditure by altogether eliminating meshwork on the windows despite
the need of it.

OBJECTS OF INVENTION
It is therefore an object of the invention to propose an improved device for opening
and/or closing of an outside-opening window from inside having or not having
permanently fixed wire-mesh structure which eliminates the disadvantages of prior art.
Another object of the invention is to propose an improved device for opening and/or
closing of an outside-opening window from inside having or not having permanently
fixed wire-mesh structure which is simple, efficient and user-friendly.
A further object of the invention is to propose an improved device for opening and/or
closing of an outside-opening window from inside having or not having permanently
fixed wire-mesh structure which is easy-to-operate and eliminates the requirement of
an user taking-out his hand across the window for operating the device and/or the
window.

A still further object of the invention is to propose an improved device for opening
and/or closing of an outside-opening window from inside having or not having
permanently fixed wire-mesh structure which does not diminish the purpose of
preventing entry of unwanted creatures inside a room.

Yet another object of the invention is to propose an improved device for opening and/or
closing of an outside-opening window from inside having or not having permanently
fixed wire-mesh structure which is less-costly and requires zero-maintenance.

SUMMARY OF INVENTION
The present invention is provided with a device for operating an outside opening
window with or without mounted meshwork structure, the window comprising a window
frame to which a shutter is attached via a hinge means, the frame having at least one
through-hole, the device comprising a main bar disposed on the hinged side of the
window shutter, the main bar being axially movable along the through-hole in the frame
when manipulated; a bracket fixed at the bottom portion of the shutter at a location
substantially adjacent to the hinge means; a link bar having at least two attachments,
the first attachment pivotably joining a first end of the link bar to a distal end of the
main bar, the second attachment joining a second end of the link bar to the bracket,
such that the link bar can rotate in a substantially horizontal plane when manipulated
via the main bar characterized in that a handle means connected to the user's end of
main bar for manipulating the main bar, a forward force via the handle means when
transmitted through the main and link bars causes release of the shutter from the
frame via bracket allowing to move to a half-open position, a further force in the
reverse direction when applied to the handle means, the main bar causes the shutter to
further move forward to place the window in fully- opened condition wherein operating
the handle means from inside the window and the window is with or without mounted
meshwork structure.


A plurality of grooves, notches, holes is arranged with matching stoppers such that the
stoppers can interengage at suitable places to hold the window door at desired
locations between a total close-position and a fully-open condition. Further, a biasing
means can be provided to act between the window frame and the main bar so as to
push the main bar always towards outside. In such a state, the window shutter will
automatically and effortlessly swing to half open position the moment it is released
from the engaged mode, and will remain so as long as it is not pulled back.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 - shows a side view of a first embodiment of the device according to the
present invention
Figure 2 & 3 - show a top view of the first embodiment of the device in two separate
mode of operation
Figure 4 & 5 - show a top view of a second embodiment of the device in two separate
mode of operation
Figure 6 - illustrates the method of operation of the device of the invention

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
Figure 1 shows, a vertical arm of a window frame (15), to which a shutter (21) is
hingedly attached at a position (20). A main bar (11) is so provided to move across the
frame through a hole (14) in the frame (15) configured below the hinged side (20) of
the shutter (21). The distal end (12) of the main bar (11) is linked to a bracket (22),
attached to the bottom of the shutter (21) on it's outer side (13), through a link bar
(16), which can rotate in a substantially horizontal plane around it's points of
attachments (12,13).

For opening the window (as shown in Fig.3), the main bar (11) is pushed towards
outside by a handle (10) thereby pulling the shutter (21) out through the link bar (16)
and the bracket (22). The shutter (21) half-opens when it becomes almost parallel to
the main bar (11). Then the main bar (11) is pulled by the handle (10) towards inside
to open the shutter (21) further to make the window full-open. To close the window the
steps are reversed, that is, the main bar (11) is pushed first outside and then inside (as
shown in Fig.2).

A biasing means is provided optionally which acts between the main bar (11) and the
window frame (15) in such a manner that the biasing means pushes the main bar (11)
towards outside and keeps the window shutter (21) at around 90 degrees or half open
position when left to itself. The moment, the shutter (21) is released from the closed or
any other position, the shutter swings to the half-open position under biasing action
and keeps the shutter there. The window may swing to left or right under influence of
windy conditions and returns back to the same half open position. This is very
convenient arrangement for the user as he is no longer required to fix the open shutter
in an intermediate position after opening the window because the window will then act
by the spring action. Alternatively, the biasing means may be placed in a manner to
always pull the main bar (11) inwardly in which case, the window shutter (21) will
always remain closed or full-open position under the influence of the biasing means,
and will be required to push out the main bar (11) for keeping the shutter (21) open in
intermediate positions.

In order to prevent the window shutter (21) from getting stuck in the half open position
due to it's parallelity with the main bar (11), one of the holes at attachment (13) is
made V or arc shaped. This will keep the main bar (11) and the shutter's bottom
slightly away from the exactly parallel position and prevent from getting stuck.
In one embodiment of the invention, the device is shifted right upwards above the
window shutter (21) and fitted in an inverted position which is a mirror image of earlier
position. This will make the down corner area of the window completely free and
vacant. A suitable lever or handle may be provided for reaching and operating at a height.

Another embodiment of the invention has been shown in figures 4 and 5. This
eliminates the need of making a hole in the frame (15). Also, no part of the device
protrudes outside of the frame. In figures 4 and 5, where the top view of this
arrangement has been shown, (15) is a vertical arm of the window frame and (18) a
horizontal lower arm. The outside window shutter or door (21) is hinged to the frame
(15) at a position (20). Figure 4 shows the device with the window shutter (21) in
closed mode whereas figure 5 shows the device with the window shutter in open mode.
The main bar (11) of the window operator rotates round a pivot, and has a handling
means (10, 14) having a first part (10) disposed along and inside the frame (15)
whereas the remaining part of the handling means (14) is on the other side over the
horizontal arm (18) of the frame as shown in figures 4 and 5. The link bar (16)
connects the main bar (11) to the door through attachments (12, 22). This
arrangement facilitates fixing of mesh work at the inside edge of the frame (15, 18) on
the window covering the window completely. The handling means (10) of the main bar
(11) remains on the inside, which is the user's side of the meshwork whereas the
operating part (14) works on the other side between the meshwork and the window
shutter (21).

For opening the window, the handle (17) is pulled inwards and as a result the main bar
(11) rotates clockwise around the pivot and the shutter (21) gets pushed outwards
through the main bar (11) and the link bar (16). Figure 5 shows the window shutter
(21) in almost half open position. It further goes gradually to attain a full-open position
as the handle is pulled further onwards. To close the window, the handle (17) is pushed
in the opposite direction thereby bringing the window shutter (21) gradually back to it's
original place as in figure 4.

Figure 6 further illustrates the functioning of the device wherein, arcs (31,32) show
paths traveled by the attachments (12,22) as the window operator opens the window
from a completely closed position by clockwise turning of the handle (10). Here the


handle has been shown as making a small angle with the inner edge of frame (18),
unlike in figure 4 wherein it is shown parallel to that edge.
This is for convenience in handling so that the user has sufficient space there to hold
the handle (10) by hand. Also, for convenience in use and to keep the window corner
space free and vacant, the handle bar (10) may be raised to a point exactly some
distance up with a vertical strip or rod connect in between. As the handle bar (10) is
turned clockwise for opening the window, the attachment point (12) travels along the
arc (31) to a position (12') whereas the attachment point (22) traverses along the arc
(32) to a new position (22'). In the process, the window shutter (21) opens from initial
position to a fully open position (21'). A reverse action turns the handle bar (10) an
opposite way, in the anticlockwise direction gradually towards the original starting
point.

Here the lengths of the operating part (14) of the main bar (11) and the link bar (16).
put together, should be sufficiently greater than the distance between the attachment
points (11,22') in the completely open position of the shutter (21), for proper
functioning of the device, otherwise the shutter (21) may not open completely because
the moment of the two bars (11) and (16) come in a straight line, the force that moves
the window shutter (21) forward will cease to exist, and will rather work in an opposite
way.

When the window is in a shut mode, the link bar (16) makes a small angle (33) with the
main bar (11). This angle (33) should be as large as possible within the space available
between the window shutter (21) and the main bar (11). Also, when the handle (10) is
turned clockwise to open the window, the angle (33) which itself is a small one, should
not be allowed to reduce further, because if it reduces further, the shutter may tend to
get stuck and refuse to open.

Attached files:
videosimages_ nwo.zip
DSCF0006.AVI
DSCF0005.AVI

Patents:
IN 250,411 issued 2012-01-03   [MORE INFO]

Inventor(s): Singh, Jainendra Kumar

Type of Offer: Sale or Licensing



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