CA1230045A - Venetian blind tilt limiter - Google Patents
Venetian blind tilt limiterInfo
- Publication number
- CA1230045A CA1230045A CA000444592A CA444592A CA1230045A CA 1230045 A CA1230045 A CA 1230045A CA 000444592 A CA000444592 A CA 000444592A CA 444592 A CA444592 A CA 444592A CA 1230045 A CA1230045 A CA 1230045A
- Authority
- CA
- Canada
- Prior art keywords
- tilt
- base
- limiter
- disc
- headrail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Blinds (AREA)
Abstract
A B S T R A C T
A yenetian blind tilt limiter having a base which is fitted into a headrail. The base has an aperture in which a limiter disc rotates and the disc includes an opening for engaging a tilt rod. Stops on the disc cooperate with a cutout on the edge of the aperture to limit rotational movement of the disc.
A yenetian blind tilt limiter having a base which is fitted into a headrail. The base has an aperture in which a limiter disc rotates and the disc includes an opening for engaging a tilt rod. Stops on the disc cooperate with a cutout on the edge of the aperture to limit rotational movement of the disc.
Description
~3~
FIELD OF lye INVENTION
This invention relates to a venet;an blind 6 tilt limiter for lLmiting tilting movement of the tilt rod and subsequent opening and closing movement of the slats of a venetian blind assembly. More particularly the invention concerns a tilt limiter by which the direction of tilt of the tilt rod to move slats from a 10 fully open to a fully closed position may be reversed and by which a partial tilting or opening of the slats may be controlled.
BACKGROUND OF TOE INVENTION
Various constructions of venetian blind tilt limiters have been utilized in the past. Such constructions axe usually installed within a headrail containing a tilt rod and sometimes form part of an operating member for tilting the rod. Such tilt limiters are usually positioned within the headrail at a particular point and serve to limit the degree of tilt in only one direction. If, however, it it desired to limit the tilt in an opposite direction or to vary tilt to a partially closed position, that is where the slats of the blind assembly are partially closed, different tilt lImiter constructions are required.
This necessarily increase the inventory of parts that must be kept on hand in order to provide flexibility in tilting of the slats of a blind assembly.
Further having a tilt limiter form part of the operating means for tilting the tilt rod restricts the area within the headrail where the tilt limiter may be positioned.
It is therefore an object of my invention to pxovide for a tilt limiter construction whereby the same parts comprising the tilt limiter may be used to control tilting of a tilt rod such that slats may be moved from a fully open positionto a fully closed position in either of two directions
FIELD OF lye INVENTION
This invention relates to a venet;an blind 6 tilt limiter for lLmiting tilting movement of the tilt rod and subsequent opening and closing movement of the slats of a venetian blind assembly. More particularly the invention concerns a tilt limiter by which the direction of tilt of the tilt rod to move slats from a 10 fully open to a fully closed position may be reversed and by which a partial tilting or opening of the slats may be controlled.
BACKGROUND OF TOE INVENTION
Various constructions of venetian blind tilt limiters have been utilized in the past. Such constructions axe usually installed within a headrail containing a tilt rod and sometimes form part of an operating member for tilting the rod. Such tilt limiters are usually positioned within the headrail at a particular point and serve to limit the degree of tilt in only one direction. If, however, it it desired to limit the tilt in an opposite direction or to vary tilt to a partially closed position, that is where the slats of the blind assembly are partially closed, different tilt lImiter constructions are required.
This necessarily increase the inventory of parts that must be kept on hand in order to provide flexibility in tilting of the slats of a blind assembly.
Further having a tilt limiter form part of the operating means for tilting the tilt rod restricts the area within the headrail where the tilt limiter may be positioned.
It is therefore an object of my invention to pxovide for a tilt limiter construction whereby the same parts comprising the tilt limiter may be used to control tilting of a tilt rod such that slats may be moved from a fully open positionto a fully closed position in either of two directions
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and which also may be used to control movement of the slats to a partially opened position in the event such is desired.
It is a still further object of my invention to provide for a tilt limiter which may be conveniently positioned at varying positions within the heaarail and along a tilt rod.
GENERAL DESCRIPTION OF THE_INVENTION
A venetian blind tilt limiter constructed according to my invention broadly comprises a base adapted to fit into-a conventional headrail. The base has a circular aperture therein including a cutout on the edge of the aperture forming an operating arc or space. A limiter disc is fitted into the aperture to rotate therein. The disc has an axially extenaing first stop which is adapted to extend into the operating arc or space and engage the ends of the cutout to limit rotation of the limiter disc and thus tilt of the disc.
The disc has an opening therein adapted to engage a conventional tilt rod such that rotation of the tilt rod will be limited by engagement of the first stop with the ends 20 of the cutout.
The limiter disc preferably has a bearing portion adapted to engage with the edges of the circular aperture and a flange which extenas radially outwardly of the bearing portion and which is adapted to engage one side of the base.
25 The stop preferably has a radially extending ear on the end thereof opposite the flange where the ear is spaced from the flange a distance substantially equal to the thickness of the base such that it Jay engage a side of the base opposite the side engaged by the flange.
The limiter disc preferably includes a second stop similar in all respects with the first stop but which is circumferentially spaced with respect to the second stop on the opposite side of the flange than the first stop. This second stop also has an ear similar to that of the first stop. This second ear provides a different configuration of tilt, that
and which also may be used to control movement of the slats to a partially opened position in the event such is desired.
It is a still further object of my invention to provide for a tilt limiter which may be conveniently positioned at varying positions within the heaarail and along a tilt rod.
GENERAL DESCRIPTION OF THE_INVENTION
A venetian blind tilt limiter constructed according to my invention broadly comprises a base adapted to fit into-a conventional headrail. The base has a circular aperture therein including a cutout on the edge of the aperture forming an operating arc or space. A limiter disc is fitted into the aperture to rotate therein. The disc has an axially extenaing first stop which is adapted to extend into the operating arc or space and engage the ends of the cutout to limit rotation of the limiter disc and thus tilt of the disc.
The disc has an opening therein adapted to engage a conventional tilt rod such that rotation of the tilt rod will be limited by engagement of the first stop with the ends 20 of the cutout.
The limiter disc preferably has a bearing portion adapted to engage with the edges of the circular aperture and a flange which extenas radially outwardly of the bearing portion and which is adapted to engage one side of the base.
25 The stop preferably has a radially extending ear on the end thereof opposite the flange where the ear is spaced from the flange a distance substantially equal to the thickness of the base such that it Jay engage a side of the base opposite the side engaged by the flange.
The limiter disc preferably includes a second stop similar in all respects with the first stop but which is circumferentially spaced with respect to the second stop on the opposite side of the flange than the first stop. This second stop also has an ear similar to that of the first stop. This second ear provides a different configuration of tilt, that
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is to say a partial tilting of the slats, than that of the first stop when the tilt limiter is mounted within the aperture such that the second stop extends within the arcuate cutout rather than the first stop.
Preferably the base and the tilt limiter are made of a plastic material such that there is sufficient resiliency between the parts so that the tilt limiter may be snapped into engagement with the base whereby either the first or second ~t~pextends into the arcuate cutout. In 10 this manner the change from a configuration allowing complete opening and closing of slats of a blind assembly to one allowing partial opening of the slats of a blind assembly may be easily accomplished sImply by inserting one or the other axial side of the tilt limitex into the aperature.
Preferably the base includes mounting means in order that it may be interchangeably mounted in a headrail such that the arcuate cutout may face a rear side of a headrail or alternatively may face a front side of a headrail.
In this manner the tilt limiter may control the direction of 20 tilting m~ve~ent of a tilt rod from the open position of the slats to the closed position.
In addition the base is preferably of a planar shape and has two spaced leg portions which are adapted to engage the web portion of a U-shaped headrail at their ends 25 joining two upstanding legs. The opposite ends of the leg portions haYe two shoulders thereon adapted to engage inturned ends of the upstanding legs of the headrail in order to lock the base in the headrail. The space between the leg portions of the base extends into the aperture and forms part of the 30 aperture which further adds to the resiliency ox the base allowing it to be snapped into place with a headrail and limiter disc to be snapped into the aperture.
35_ BRIEF DESCRIPTION OF THE DRAWINGS
Figure l is a perspective view of a tilt limiter constructed according to the invention illustratiny a limiter disc rotata~ly mounted within a base;
Figure 2 is a view similar to Figure l taken from the opposite side of the tilt limiter;
Figure 3 is a perspective view of the limiter disc illustrated in Figures l and 2;
Figure 4 is a cross-sectional view of a headrail 10 having a tilt limiter positioned therin;
Figure 5 is a view similar to Figure 4 with the base reversed in the headrail; and, Figure 6 is a cross-sectional view ox Figure 4 taken along lines 6-6.
DESCRIPTION OF THE PREFERRED EMBODIMENT
_ _ _ _ _ Referring to figure l there is illustrated a tilt limiter l constructed according to the invention comprising a base 2 and a limiter disc 3. As shown the base 20 2 comprises a planax member having leg portions 4 and 5 including apexes 6 and 7 on the free ends thereof with the legs being spaced from each othex such that the space forms part of a circular aperture 8 in the base. Shoulders 9 and l0 are positioned on the opposite ends of the base from 25 the free ends of the leg portions 4 and 5.
Referring to Figure 4 the base 2 is shown positioned within a U-shaped headrail 20 having upstanding leg portions 21 and 22 joined by a web 23. The end of the leg portion 21 is inturned at 24 while the end of the leg 30 portion 22 is inturned at 25. As shown the free ends of the leg portions 4 and 5 bear against the web 23 such that the apexes 6 and 7 rest in the corners formed between the web and upstanding leg portions while the shoulders 9 and l0 engage the end of the inturned ends 24 and 25 to securely 35 position the base in place.
-5~ S
The aperture 8 of the limiter disc has an arcuate cutout 26 in one quadrant thereof as shown in Figure 1 forming an operating arc. The base may be mounted in the headrail 2a such that the arcuate cutout 26 faces or is 5 adjacent to a front side 27 of the headrail or as shown in Figure 5, the base 2 may be reversed or interchanged in the headrail so that the arcuate cutout 26 faces a rear side 28 of the U-shaped headrail. Thus the shoulders 24 and 25 and the free ends of the leg portions 4 and 5 serve as a 10 mounting means for interchangeably mounting the base in the headrail by which the cutout may face either the front or rear sides of the headrail.
eferring to Figures 1, 2 and 3 the limiter disc is shown comprising a bearing portion 31 which rotatably 15 engages the edges of the aperture 8. A radially extending flange 32 is positioned substantially in the middle of the bearing portion 31 and, as shown in Figures 2 and 3, one side of the flange is adapted to engage a surface of the base.
The disc limiter 3 has thereon a first axially extending stop 20 33 extending from one side of the flange 32 and a second axially extending stop 34 extending prom an opposite side of the flange 32. Stop 33 has an ear 35 extending radially from an end thereof opposite the flange 32 while the stop 34 has a similar ear 36 extending radially from an end 25 t~e~èof opposite the flange 32. As shown in Figure 6 both ears 35 and 36 are spaced from the flange 32 by a distance substantially equal to tha thickness of the vase 2 so that each ear may engage an opposite side of the base from that engaged by the flange 32. Stops 33 and 34 are circumferentially 30 spaced from one another to provide a degree of flexibility in tilting as more fully explained hereafter.
The limiter disc 3 includes an opening 37 adapted to receive a tilt rod 40. As shown the opening 37 is hexed-shaped to accommodate the hex-shaped tilt rod 40 35 although it could be of any shape to accommoaate a complimentary-~3~ S
shaped tilt rod. In the particular arrangement shown, shoulders 38 forming a square are provided Jo accommodate a square-shaped tilt rod. When the disc limiter 3 i5 fitted onto a square s~ap~dtilt rod, the thin section 39, the edges 5 of which form the hex-shaped opening, is broached by forcing the limiter over the end of the square-shaped tilt rod.
In assembling the tilt limiter in a blind assembly the tilt rod and tape roll assemhly, not shown, are initially positioned such that the slats of the venetian 10 blind assembly, also not shown, are in a horizontal position.
The limiter disc is then inserted on the tilt rod with one stop pointing straight up and the other stop sloped in the direction of desired tilt. If horizontal to closed tilting action of the slats is desired, the base is placed over the tilt rod with the cutout facing towards the direction of tilt of the rod to cause tilting of the slats from the horizontal open position to a closed position and with the age being on the side of the flange having the straight-up stop. The base is then moved towards the 20 rod such that the rod passes between the spaced leg portions of the base and between the upstanding legs of the headraîl until the top part of the base fits into the space between the radially extending ear and flange after which the base is snapped into position on the disc and in 25 the headrail. Preferably the leg portions 4 and 5 are tapered to assist in guiding the base over the tilt rod.
If instead partial tilting of the slats of the blind assembly in both directions is desired, the base is positioned on the side of the disc with the sloping stop and 30 with the cutout facing the side of desired greatest tilt.
If the direction of tilt is to be in an opposite direction either for tilting for full closure or for partial closure, then the positioning of the base within the headrail is reversed as shown in Figure I.
In order to disassemble the tilt limiter from the ~3~ 5 ~-J~-headrail, the limiter disc is rotated such that the control stop, that is the stop extending in the cutout, is at a 45 position. The opposite upper corner of the base is then pulled in an upward direction resulting in disassembly of 5 the base from the disc.
It is thus seen that a venetian blind tilt limiter as described may provide flexibility in obtaining different directions of tilt of the slats of a venetian blind assembly as well as obtaining constructions providing for 10 partial tilting of the slats and that the particular tilt limiter construction resulting in these features utilizes a minimum of parts which may be conveniently molded for assembly together.
is to say a partial tilting of the slats, than that of the first stop when the tilt limiter is mounted within the aperture such that the second stop extends within the arcuate cutout rather than the first stop.
Preferably the base and the tilt limiter are made of a plastic material such that there is sufficient resiliency between the parts so that the tilt limiter may be snapped into engagement with the base whereby either the first or second ~t~pextends into the arcuate cutout. In 10 this manner the change from a configuration allowing complete opening and closing of slats of a blind assembly to one allowing partial opening of the slats of a blind assembly may be easily accomplished sImply by inserting one or the other axial side of the tilt limitex into the aperature.
Preferably the base includes mounting means in order that it may be interchangeably mounted in a headrail such that the arcuate cutout may face a rear side of a headrail or alternatively may face a front side of a headrail.
In this manner the tilt limiter may control the direction of 20 tilting m~ve~ent of a tilt rod from the open position of the slats to the closed position.
In addition the base is preferably of a planar shape and has two spaced leg portions which are adapted to engage the web portion of a U-shaped headrail at their ends 25 joining two upstanding legs. The opposite ends of the leg portions haYe two shoulders thereon adapted to engage inturned ends of the upstanding legs of the headrail in order to lock the base in the headrail. The space between the leg portions of the base extends into the aperture and forms part of the 30 aperture which further adds to the resiliency ox the base allowing it to be snapped into place with a headrail and limiter disc to be snapped into the aperture.
35_ BRIEF DESCRIPTION OF THE DRAWINGS
Figure l is a perspective view of a tilt limiter constructed according to the invention illustratiny a limiter disc rotata~ly mounted within a base;
Figure 2 is a view similar to Figure l taken from the opposite side of the tilt limiter;
Figure 3 is a perspective view of the limiter disc illustrated in Figures l and 2;
Figure 4 is a cross-sectional view of a headrail 10 having a tilt limiter positioned therin;
Figure 5 is a view similar to Figure 4 with the base reversed in the headrail; and, Figure 6 is a cross-sectional view ox Figure 4 taken along lines 6-6.
DESCRIPTION OF THE PREFERRED EMBODIMENT
_ _ _ _ _ Referring to figure l there is illustrated a tilt limiter l constructed according to the invention comprising a base 2 and a limiter disc 3. As shown the base 20 2 comprises a planax member having leg portions 4 and 5 including apexes 6 and 7 on the free ends thereof with the legs being spaced from each othex such that the space forms part of a circular aperture 8 in the base. Shoulders 9 and l0 are positioned on the opposite ends of the base from 25 the free ends of the leg portions 4 and 5.
Referring to Figure 4 the base 2 is shown positioned within a U-shaped headrail 20 having upstanding leg portions 21 and 22 joined by a web 23. The end of the leg portion 21 is inturned at 24 while the end of the leg 30 portion 22 is inturned at 25. As shown the free ends of the leg portions 4 and 5 bear against the web 23 such that the apexes 6 and 7 rest in the corners formed between the web and upstanding leg portions while the shoulders 9 and l0 engage the end of the inturned ends 24 and 25 to securely 35 position the base in place.
-5~ S
The aperture 8 of the limiter disc has an arcuate cutout 26 in one quadrant thereof as shown in Figure 1 forming an operating arc. The base may be mounted in the headrail 2a such that the arcuate cutout 26 faces or is 5 adjacent to a front side 27 of the headrail or as shown in Figure 5, the base 2 may be reversed or interchanged in the headrail so that the arcuate cutout 26 faces a rear side 28 of the U-shaped headrail. Thus the shoulders 24 and 25 and the free ends of the leg portions 4 and 5 serve as a 10 mounting means for interchangeably mounting the base in the headrail by which the cutout may face either the front or rear sides of the headrail.
eferring to Figures 1, 2 and 3 the limiter disc is shown comprising a bearing portion 31 which rotatably 15 engages the edges of the aperture 8. A radially extending flange 32 is positioned substantially in the middle of the bearing portion 31 and, as shown in Figures 2 and 3, one side of the flange is adapted to engage a surface of the base.
The disc limiter 3 has thereon a first axially extending stop 20 33 extending from one side of the flange 32 and a second axially extending stop 34 extending prom an opposite side of the flange 32. Stop 33 has an ear 35 extending radially from an end thereof opposite the flange 32 while the stop 34 has a similar ear 36 extending radially from an end 25 t~e~èof opposite the flange 32. As shown in Figure 6 both ears 35 and 36 are spaced from the flange 32 by a distance substantially equal to tha thickness of the vase 2 so that each ear may engage an opposite side of the base from that engaged by the flange 32. Stops 33 and 34 are circumferentially 30 spaced from one another to provide a degree of flexibility in tilting as more fully explained hereafter.
The limiter disc 3 includes an opening 37 adapted to receive a tilt rod 40. As shown the opening 37 is hexed-shaped to accommodate the hex-shaped tilt rod 40 35 although it could be of any shape to accommoaate a complimentary-~3~ S
shaped tilt rod. In the particular arrangement shown, shoulders 38 forming a square are provided Jo accommodate a square-shaped tilt rod. When the disc limiter 3 i5 fitted onto a square s~ap~dtilt rod, the thin section 39, the edges 5 of which form the hex-shaped opening, is broached by forcing the limiter over the end of the square-shaped tilt rod.
In assembling the tilt limiter in a blind assembly the tilt rod and tape roll assemhly, not shown, are initially positioned such that the slats of the venetian 10 blind assembly, also not shown, are in a horizontal position.
The limiter disc is then inserted on the tilt rod with one stop pointing straight up and the other stop sloped in the direction of desired tilt. If horizontal to closed tilting action of the slats is desired, the base is placed over the tilt rod with the cutout facing towards the direction of tilt of the rod to cause tilting of the slats from the horizontal open position to a closed position and with the age being on the side of the flange having the straight-up stop. The base is then moved towards the 20 rod such that the rod passes between the spaced leg portions of the base and between the upstanding legs of the headraîl until the top part of the base fits into the space between the radially extending ear and flange after which the base is snapped into position on the disc and in 25 the headrail. Preferably the leg portions 4 and 5 are tapered to assist in guiding the base over the tilt rod.
If instead partial tilting of the slats of the blind assembly in both directions is desired, the base is positioned on the side of the disc with the sloping stop and 30 with the cutout facing the side of desired greatest tilt.
If the direction of tilt is to be in an opposite direction either for tilting for full closure or for partial closure, then the positioning of the base within the headrail is reversed as shown in Figure I.
In order to disassemble the tilt limiter from the ~3~ 5 ~-J~-headrail, the limiter disc is rotated such that the control stop, that is the stop extending in the cutout, is at a 45 position. The opposite upper corner of the base is then pulled in an upward direction resulting in disassembly of 5 the base from the disc.
It is thus seen that a venetian blind tilt limiter as described may provide flexibility in obtaining different directions of tilt of the slats of a venetian blind assembly as well as obtaining constructions providing for 10 partial tilting of the slats and that the particular tilt limiter construction resulting in these features utilizes a minimum of parts which may be conveniently molded for assembly together.
Claims (9)
1. A venetian blind tilt limiter comprising a base adapted to fit into a headrail, an at least partially circular aperture in said base, a cutout on an edge of said aperture forming an operating arc, a limiter disc rotatably fitted in said aperture, an axially extending first stop on said disc adapted to move in said operating arc and to engage the ends of said cutout to limit rotational tilting movement of said limiter disc and an opening in said disc adapted to non-rotatably receive a tilt rod whereby rotation of said tilt rod is dependent on rotation of said limiter disc and wherein said limiter disc includes an axially extending second stop circumfer-entially spaced with respect to said first stop whereby engagement of said first stop with the ends of said arcuate slot will result in a different configuration of tilt of said tilt rod than when said second stop engages the ends of said arcuate slot.
2. A venetian blind tilt limiter according to Claim 1 wherein said limiter disc comprises a bearing portion adapted to rotatably engage the edges of said aperture and a flange extending radially outwardly from said bearing portion adapted to engage a side of said base and wherein said first stop has a radially extending ear on an end thereof opposite said flange and spaced from said flange by an amount substantially equal to the thickness of said base and adpated to engage a side of said base opposite to the side engaged by said flange.
3. A venetian blind tilt limiter according to Claim 2 having a radially extending second ear on an end thereof opposite said flange and axially spaced from said flange by an amount substantially equal to the thickness of said base and adapted to engage a side of said base opposite to the side engaged by said flange.
4. A venetian blind tilt limiter according to Claim 3 wherein said first stop extends axially from one side of said flange and said second stop extends axially from an opposite side of said flange.
5. A venetian blind tilt limiter according to Claim 1 wherein said first stop is integral with said limiter disc.
6. A venetian blind tilt limiter according to Claim 1 wherein said base includes mounting means for interchangeably mounting said base in a headrail whereby said cutout may face a rear side of a headrail or a front side of a headrail in order that the direction of tilt to a closed position of the slats of a venetian blind assembly may be interchanged.
7. A venetian blind tilt limiter according to Claim 6 wherein the headrail in which the base is adapted to be mounted is of a substantially U-shape having two upstanding legs joined by a web portion and wherein the free ends of the legs are inwardly bent and wherein said base comprises a substantially planar member having two spaced leg portions on one end thereof adapted to engage the web portion of a headrail and the end of the planar member opposite the leg portions is adapted to engage the inturned ends of a headrail to lock the base in the headrail.
8. A venetian blind tilt limiter according to Claim 7 wherein a part of the space between said two spaced leg portions comprises a part of said aperture.
9. A venetian blind tilt limiter according to Claim 1, 2 or 3 wherein the opening in said disc adapted to receive the tilt rod includes a portion which, in use, is broached by the forcing of the limiter over an end of the tilt rod whereby to accommodate different sectional shapes of tilt rod.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46764683A | 1983-02-18 | 1983-02-18 | |
| US467,646 | 1983-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1230045A true CA1230045A (en) | 1987-12-08 |
Family
ID=23856540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000444592A Expired CA1230045A (en) | 1983-02-18 | 1984-01-03 | Venetian blind tilt limiter |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1230045A (en) |
-
1984
- 1984-01-03 CA CA000444592A patent/CA1230045A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |