This application claims priority to Canadian Patent Application No. 3154632 filed Mar. 29, 2022, the disclosure of which is hereby incorporated by reference in its entirety.
The present invention relates to a window covering, and more specifically to a cordless window covering that may be raised and lowered from its top and bottom.
Manually operated, window shades, blinds or coverings can be classified as either cord or cordless. Even though mass production techniques have reduced the price, cord and cordless window coverings are relatively expensive and typically require installation by trained installers using brackets as fasteners on a door or window. The cords hanging down from the sides of a cord type shade are aesthetically unpleasing, especially so in window installations where several windows are adjacent one another. The most serious drawback, however, is the safety hazard caused by the dangling cords to children and pets such that accidental choking or hanging may occur.
There are numerous lock and clutch mechanisms used with cord shades, and many clutch mechanisms utilize springs to assist in raising or lowering the shades. There are numerous cordless mechanisms for winding the cords about a stationary capstan and numerous mechanisms for laterally moving the capstan.
In the cordless type, the weight of the fabrics limits the size of the shade or blind that can be made, with a large top rail that contrasts with a smaller bottom rail and usually operate with a spring assist mechanism that is enclosed in a metal tube or are motorized which make the shade or blind very expensive such that the average consumer may not be able to afford to purchase it.
Window coverings such as shades and blinds are available with various blind materials, including fabrics of various kinds. In this way the user can adjust the colour or thickness of the covering to provide light or dark effects. Most of such coverings have controls by which the entire covering panel, i.e., a rectangle of covering, is raised or lowered.
U.S. Pat. No. 6,047,759 describes a conventional cordless window shade with two lift cords running vertically and parallel to each other in the shade with a wrap mechanism on the roller bar to allow the lift cords to uniformly wrap around the roller bar, and since the top of each lift cord is wrapped about the shade roller bar this obviates using capstans or pulleys. This window shade is mounted to the frame of the window by conventional brackets which mount to the window frame and can be attached to top rail in any number of known mounting arrangements. This shade has a larger top rail than bottom rail. The entire shade is raised from the bottom to the top.
U.S. Pat. No. 7,143,802 describes a motorized cordless window blind assembly similar in mechanics to the above but with an intermediate rail suspended below the headrail and bottom rail and window covering material extends between the intermediate rail and the bottom rail. The patent states that it is believed that independent movement of the intermediate rail and the bottom rail enables selected regions of a window opening to be covered, while other portions remain uncovered. For example, a user may desire to cover a lower portion of a window opening while providing visual access through an upper portion of the window covering. This blind uses a roller bar to roll up the lift cords. This window shade is mounted with a mounting bracket and mounting screws for mounting the headrail over a window opening. This shade has a larger top rail than bottom rail. The shade is raised by a roller tube acting as an accumulator to roll up the lift cords.
Australian Patent 2007201248 describes a cordless blind having a compartment within the top rail which had a winding drum (rather than roller bar) for winding a suspension cord. Since this window covering is pulled down by the bottom rail, it must be secured to a window or wall by the top rail. The top rail is larger than the bottom rail.
South Korean patent publication KR20100134397 describes a corded blind in a window having two panes of glass and a frame. There are two lift cords in the blind with two winding rolls, respectively, and a side cord on a pulley, which side cord hangs out of the frame. This window shade is inside a window and the entire shade is raised from the bottom to the top by a cord.
U.S. Pat. No. 8,074,698 describes at least one frame securing clip, akin to a mounting bracket, for releasably securing a blind in a frame to a window frame. The blind has two lift cords running vertically and parallel to each other in the blind which is pushed up to open it within the frame. There is no top rail and bottom rail per se, but rather the top of the frame is like the top rail and a small handle on the bottom of the blind is like the bottom rail.
U.S. Pat. No. 9,988,837 describes a motorized blind with at least two lift cords running vertically and parallel to each other in the blind, each lift cord being supported by a lift spool assembly. This blind's head rail may be mounted to a window frame or other architectural feature by mounting brackets or other mounting mechanism to cover the window or other opening. This shade has a larger top rail than bottom rail. The entire shade is raised from the bottom to the top.
South Korean patent publication KR20170130143 describes a motorized blind/screen with a top screen rolling pipe for rolling up the screen and a bottom end pipe. The entire shade is raised from the bottom to the top. There are magnets at the outer edges of the screen and corresponding magnets on the door frame to shield against heat cold etc.
U.S. Pat. No. 10,626,667 describes an operating system for a motorized window covering. This window covering may have at least two lift cords running vertically and parallel to each other in the window covering, each lift cord being supported by a lift spool assembly. This window covering's head rail may be mounted to a window frame or other architectural feature. The panel may be supported by lift cords to raise and lower the panel relative to the head rail. The top rail contains the mechanicals, and the bottom rail is not shown.
European patent 3,312,376 describes a blind in a support frame intended to be fixed to a load-bearing element, such as a wall with an opening. The support frame comprises a rolling-shutter box, akin to a top rail, susceptible of being fixed to a wall of the load-bearing element preferably by means of anchorage brackets. The blind also comprises a take-up roller rotatably constrained to the support frame, advantageously housed within the rolling-shutter box. The blind also comprises a flexible fabric (such as a mosquito screen), which is susceptible of being wound and unwound around the take-up roller and preferably passes through a passage slit of the rolling-shutter box to enter into and exit from the latter. The blind also comprises two lateral guides extended parallel to each other and side-by-side and placed to delimit corresponding sides of the opening, which lateral guides are connected by a transverse bar, akin to a bottom rail, at the bottom of the fabric. Between the lateral guides, the fabric is susceptible of sliding following its winding and unwinding around the take-up roller. This blind has a larger top rail (rolling-shutter box) than bottom rail (transverse bar). The fabric is raised from the bottom to the top.
European patent 3,431,698 describes a fabric roller blind in a support frame provided with at least one lateral upright (top rail) and intended to be fixed to the load-bearing structure in which the opening is obtained. The support frame can be fixed to the load-bearing structure at the opening by embedding it within the masonry or wooden section or fixed with front mounting on the internal or external face of the building wall in which the opening is made. The lateral upright comprises a rolling-shutter box with a hollow tubular body, in which fabric is wound around a take-up roller passes through a vertical slit which is made on a lateral wall of the rolling-shutter box. The blind also comprises a handle bar (lower rail), to which the second lateral edge of the fabric is fixed. Advantageously, the handle bar is made with a hollow tubular body, and the handle bar moves from the top (blind open) to the bottom along racks on each side. This involves considerable hardware to effect. The top rail is larger than the bottom rail.
What is needed is a safe, affordable cordless window covering which can be opened at the bottom or top or both the top and bottom, is installable without mounting brackets, and doesn't need to have aesthetically unpleasing differently sized rails.
The present invention is a window covering comprising a frame in which there are two rails with a panel in between, wherein one rail is movable through a first cord pulley system and the other rail is movable through a second separate cord pulley system.
In an embodiment of the invention, there is a window covering comprising a frame, a panel section inside the frame, and two cord pulley systems, wherein the frame has a front, a back, four sides and four corners, wherein the panel section comprises two rails with a panel in between, and wherein one of the two cord pulley systems enables the one of the two rails to be moved along inside the frame and the other of the two cord pulley systems enables the other of the two rails to be moved along inside the frame.
In an embodiment of invention, the two cord pulley systems comprise a cord, cord holders in two adjacent corners and a spring on the rail for holding a cord. In an embodiment of invention, each of the springs is held within a cradle. In an embodiment of invention, each of the rails has a cord guide at each end. In an embodiment of invention, the frame back additionally comprises a window covering attachment means for attaching the back of the frame to a frame for a door or window.
In an embodiment of the invention, the frame additionally comprises an open inner channel so that the cords run along inside the channel. In a further embodiment grooved end plates and/or the cord holder push the cords further into the channel.
In an embodiment of invention, there is a window covering comprising a frame, a panel section inside the frame, a top cord pulley system and a bottom cord pulley system,
In an embodiment of invention, the window covering additionally comprises two cradles and each cradle holds one of the springs.
In an embodiment of invention, the window covering additionally comprises a cord guide at the end of each rail, wherein the cord guide has one hole for holding the cord passing in through the rail and one hole for holding the cord passing out through the rail.
In an embodiment of invention, each cord holder has either two separate holes for the cord to enter and exit or one hole for the cord to enter and exit, which holes are adjacent the inside of the frame so that the cords run along the insides of the frame, and if the frame has an inner channel so that the cords run along the channel.
In an embodiment of invention, the frame sides that are substantially parallel to the rails additionally comprise a cord holder channel and the cord holder additionally comprises a base capable of slidable engaging with the cord holder channel.
In an embodiment of invention, the window covering additionally comprises a cover to cover each rail, and wherein each cover has a hole at the right end and a hole at the left end for the cords to pass through to the cord guide.
In an embodiment of invention, the back of each frame side has a mitered corner with a corner key groove and each frame side substantially parallel to the rails is joined to the frame side substantially perpendicular to the rails through a corner key inserted into the corner key groove at each corner so as to line up the corner key groove of adjacent frame sides, and wherein there is a tightened screw in the corner key at each end of each frame side. In an alternate embodiment of the invention, each corner comprises a corner cover having two corner cover inserts extending from the corner cover at right angles, and wherein each frame side ends in a straight cut with a corner cover insert in the end of each frame side to join adjacent frame sides together.
In an embodiment of invention, the frame back additionally comprises a window covering attachment means for attaching the back of the frame to a frame for a door or window. The window covering attachment means may be selected from double sided tape, glue and dap. The window covering attachment means may be a magnetic strip capable of magnetically attaching to a corresponding magnetic strip on the frame. The window covering attachment means may be capable of attaching to a corresponding frame attachment means and the attachment means may be corresponding hooks and loops which adhere when pressed together and can also be pulled apart.
In an embodiment of invention, the window covering further comprises a handle on the top rail and a handle on the bottom rail.
In an embodiment of invention, the panel may be of a honeycomb style.
The window covering may comprises a top rail of the same size as the bottom rail.
In an embodiment of invention, there is a kit for making a window covering comprising four sides of a frame, four cord holders, and two rails, wherein each of the rails comprises a base holding a spring in a cradle and a hole on either side of the cradle.
In an embodiment of the invention, the frame additionally comprises an open inner channel so that the cords run along inside the channel.
In a further embodiment there are grooved end plates on each end of the rails and each grooved end plate comprises one hole above which is one groove, and the cord passes through the hole and along the groove, which groove directs the cord into the channel of the frame of the window covering. The cord holder may also be shaped so that a hole for the cord pushes the cord into the channel.
These and other aspects of the present invention will be apparent from the brief description of the drawings and the following detailed description in which:
As seen in an embodiment of the present invention shown in
As seen in
There may be handles 110 on each rail 20, 30 to slide the panel 40 within the frame 50. However, this can also be done by gripping/pushing either or both of rails 20, 30 (and the rails 20, 30 in
As shown in
In this embodiment of the window covering 10, the panel 40 is shown in a honeycomb style, however, it will be understood that other styles of panel may be used, for example, other vertical styles, such as, honeycomb, and that the panel may be made of various fabrics or material that is preferably compressible between the top rail 20 and bottom rail 30 so that the window covering may be “opened” to the glass in a window or door that the window covering is covering. The rails 20, 30 may be made of any suitable material such as aluminum, metal, plastic, fiberglass, wood, or other materials.
As shown in
The cord pulley system of the present invention keeps the panel 40 under tension and tight within the frame. This tension is maintained by having each respective cord 190, 200 held in the corners of the frame move down to the sides of each rail and attach to the spring 170 and the panel 40 connecting the two rails. If the panel 40 is fully extended in the frame or “closed”, in the embodiment shown in the figures, the cord holders 80 hold the cord 190, 200 in the corners of the frame 50, the cord guide 28 holds the cord 190, 200 as it enters each end of the rail 20, 30 and the spring 170 in the top rail 20 is pulled by the cord 190 and lengthens when the top rail 20 is moved downwards from being adjacent to the top of the frame, and the spring 170 in the bottom rail is pulled by the cord 200 and lengthens when the bottom rail 30 is moved upwards from being adjacent to the bottom of the frame.
The cord holders 80 may be constructed in various ways and an embodiment shown in the FIGS. is further described by
To show how these cord holders 80 are held in the corners of the frame 50, meaning on the short frame sides 230 abutting the long frame sides 220, an embodiment of the frame 50 is shown in
The tension on the cords 190, 200 running from the cord guides 28 to the cord holders 80 maintain the cord holders in position on the frame 50. It will be understood that other embodiments of cord holders and frames, the cord holders could be screwed into a frame.
Within the inner aspect of the depth and width of the frame 50 fit rails 20, 30, and a panel 40 can stretch between rails lengthwise from a top short frame side 230 to a bottom short frame side 230. The window covering may be custom made to fit the door or window frame to be covered. Also, the frame and rail size could be adjusted to accommodate typical cellular (honeycomb) panels with cell sizes (the size of the diamond or honeycomb shape between two fabrics) of 20 mm, 25 mm, 32 mm, 38 mm and 45 mm, and other sizes or future standard sizes.
As shown from the back in
The frame 50 may be made of any suitable material such as aluminum, metal, plastic, fiberglass, wood, or other materials.
As shown in
It will be understood that variations of the frame may be used with the dual cord pulley system of the present invention. For example, as shown in
As shown in
It will be understood that alternatively an aesthetically pleasing covering could be added to cover back frame 68 and then any attachment means 260 could be added afterwards. In the embodiment shown in
The window covering 10 may be installed over a window frame vertically with the top rail 20 above the bottom rail 30, or with the bottom rail 30 above the top rail 20. The window covering may also be used in either orientation on an angle or horizontally, for example over a skylight. The window covering 10 could even be used horizontally rather than vertically or in any orientation or angle since the panel 40 remains in the frame 50.
The window covering 10 can be installed by users without the need of a professional installer. The window covering of the present invention can be opened at the bottom or top or both the top and bottom by virtue of the cordless pulley systems, is installable without brackets, and doesn't need to have an aesthetically unpleasing larger top than bottom rail, although it could have different sized rails if desired.
In operation, the window covering of the present invention installed vertically over a window opening may be raised and lowered by a user from either the top rail 20, the bottom rail 30, or both the top rail 20 and the bottom rail 30. A user of the window covering grasps the rail to be moved either up or down, or a handle 110 attached to the rail, and either raises or lowers the rail(s). For example, a window covering 10 in which the panel 40 covers the entire window opening, a user that wishes to see out of the top of the window will pull down the top rail 20.
In another embodiment of the end plate 120 of the present invention, there is a grooved end plate 320 with a groove 322 as shown in
In
It will be understood that in this embodiment of the window covering 10 that the bottom rail 30 also has a grooved end plate 320 at either end.
While embodiments of the invention have been described in the detailed description, the scope of the claims should not be limited by the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.
Number | Date | Country | Kind |
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3154632 | Mar 2022 | CA | national |