EP2602422B1 - Operating device for rotatitng a winding roller of a window blind - Google Patents
Operating device for rotatitng a winding roller of a window blind Download PDFInfo
- Publication number
- EP2602422B1 EP2602422B1 EP11192452.8A EP11192452A EP2602422B1 EP 2602422 B1 EP2602422 B1 EP 2602422B1 EP 11192452 A EP11192452 A EP 11192452A EP 2602422 B1 EP2602422 B1 EP 2602422B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuated
- operating device
- wall
- upright axis
- surrounding
- 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.)
- Not-in-force
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
- E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
- E06B9/32—Operating, guiding, or securing devices therefor
- E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
- E06B9/78—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor for direct manual operation, e.g. by tassels, by handles
Definitions
- This invention relates to a window blind, more particularly to an operating device for rotating a winding roller of a window blind to wind up a window covering.
- a conventional window blind generally includes a winding roller, a window covering extending downwardly from the roller, and a ring chain (or cord) disposed on an end portion of the roller and extending downwardly.
- a user can pull the ring chain to rotate the winding roller such that the window covering can be raised or lowered.
- ring chain poses choking or strangulation hazards to young children.
- Another window blind such as those disclosed in EP Application No. 10157918 . 3 and U. S. Patent Application No. 12/696173 , is provided with an operating rod to replace the ring chain.
- the operating rod extends vertically and has an upper end coupled with a winding roller by a rotation transmitting mechanism such that vertical rotation of the operating rod results in horizontal rotation of the winding roller, and a lower end coupled with a hinged handle which can be manipulated to rotate the operating rod. Since the hinged handle is disposed remote from the winding roller, it is hard for a force applied to the hinged handle to be transmitted to the rotation transmitting mechanism, thereby rendering operation of the operating rod laborious and inefficient.
- an apparatus for simultaneously closing and opening a group of blinds has drive means connected to a horizontally axis of rotation.
- the drive means is provided with means for limiting the torque upon the turning movement of the slats so as to prevent damage to the gear box of the drive means.
- An object of the present invention is to provide an operating device which is operable easily and smoothly and which has a simple construction to facilitate manufacture.
- the operating device includes a rotating shaft having a shaft end which is adapted to be coupled with a winding roller such that a rotation of the rotating shaft about an upright axis results in horizontal rotation of the winding roller for winding up or winding down a window covering, and a shaft body which extends from the shaft end along the upright axis and which has a thread segment formed on an outer shaft surface thereof.
- a sleeve shell is disposed to surround and permit the shaft body to be rotatable relative thereto so as to cooperatively define an accommodation space.
- the sleeve shell has a surrounding wall that extends in a direction of upright axis to terminate at first and second peripheral ends, and that includes first and second surrounding segments respectively proximate to the first and second peripheral ends.
- a carrier has an annular seat wall that surrounds the thread segment, and an actuated annular wall that surrounds the annular seat wall and that extends in the direction of upright axis to terminate at first and second actuated ends.
- the carrier is disposed in the accommodation space and is movable along the upright axis between a pressed position, where the first peripheral end is in pressing engagement with the first actuated end, and a non-pressed position, where the second actuated end rests on the second peripheral end.
- a force transmitting member is carried on the annular seat wall and is engaged with the thread segment.
- a rotation preventing unit is disposed between the first surrounding segment and the actuated annular wall such that, when the carrier is in the pressed position, an axially manual force applied to the surrounding wall is transmitted to move the actuated annular wall along the upright axis so as rotate the rotating shaft about the upright axis through engagement of the force transmitting member with the thread segment, thereby winding up the window covering.
- the window blind 1 includes a horizontal extending headrail 11, two mounts 12 (only one is shown in Fig. 1 ) spacedly disposed on the headrail 11, two rotary sleeves 13 (only one is shown in Fig. 1 ) rotatably mounted between the mounts 12, the winding roller 14 operatively coupled with the rotary sleeves 13 to be rotatable relative to the headrail 11 about a horizontal axis for winding up or winding down a window covering 15, and a coupling mechanism 16 operatively coupled with one of the rotary sleeves 13, and having a connecting end 161.
- the operating device 10 of this invention is connected to the connecting end 161, and is shown to comprise a rotating shaft 2, a driving unit 3, an actuating unit 4, and a rotation preventing unit.
- the rotating shaft 2 has a shaft end 22 which is adapted to be connected to the connecting end 161 of the coupling mechanism 16 such that a rotation of the rotating shaft 2 about an upright axis transverse to the horizontal axis results in a horizontal rotation of the winding roller 14, and a shaft body 24 which extends from the shaft end 22 along the upright axis and which has a thread segment 21 formed on an outer shaft surface thereof.
- the driving unit 3 includes first and second shell halves 31, 33 which are engaged with each other by a spline structure, such as a plurality of axially extending holes and protrusions 315, 335 so as to cooperatively form a sleeve shell.
- the sleeve shell is disposed to surround and permit the shaft body 24 to be rotatable relative thereto so as to cooperatively define an accommodation space 32.
- the first and second shell halves 31, 33 respectively have first and second surrounding segments 312, 332 which cooperatively form a surrounding wall and which extend in a direction 20 of the upright axis to terminate at first and second peripheral ends 311, 331, respectively.
- the first and second shell halves 31, 33 respectively define first and second penetrating holes 314, 334 formed at the first and second peripheral ends 311, 331 for passage of the shaft body 24.
- the actuating unit 4 is movably disposed in the accommodation space 32, and includes a carrier 41 and a plurality of force transmitting members 42.
- the carrier 41 includes a bearing seat member 410 and an actuated cap member 411.
- the bearing seat member 410 has an annular seat wall 416 that surrounds the thread segment 21 and that has a plurality of bearing surfaces 419 angularly displaced from each other and facing upward to respectively form a plurality of recesses 418.
- the actuated cap member 411 has an actuated annular wall 412 which surrounds the annular seat wall 416 and which extends in the direction 20 of upright axis to terminate at first and second actuated ends 4121, 4122, and an inner flange 413 which extends inwardly and radially from the first actuated end 4121.
- the actuated annular wall 412 of the actuated cap member 411 is engaged with the annular seat wall 416 of the bearing seat member 410 by a spline structure, such as a plurality of recesses and protrusions 415, 417.
- the carrier 41 is movable along the upright axis between a pressed position ( Fig. 4 ), where the first peripheral end 311 is in pressing engagement with the first actuated end 4121 and the inner flange 413, and a non-pressed position ( Fig. 3 ), where the second actuated end 4122 rests on the second peripheral end 331.
- the force transmitting members 42 are in the form of balls 42 which are received in the recesses 418, respectively, to be rotatably engaged on the bearing surfaces 419, respectively, which are held by the inner flange 413, and which are in rollable contact with the thread segment 21.
- the force transmitting members 42 may be integrally formed with the carrier 41.
- the rotation preventing unit includes a plurality of blocking bars 313 which project radially and inwardly from the first surrounding segment 312 of the first shell half 31 and which are angularly displaced from each other, and a plurality of blocked protrusions 414 which are configured to be engageable and blocked by the blocking bars 313 in a circumferential direction about the upright axis when the carrier 41 is in the pressed position, as shown in Figs. 4 and 5 .
- the rotation preventing unit which can prevent rotation of the carrier 41 relative to the sleeve shell, the downwardly pulling force is transmitted to move the actuating unit 4 along the upright axis so as to spirally rotate the rotating shaft 2 in a clockwise direction about the upright axis through the engagement of the force transmitting members 42 with the thread segment 21, thereby winding up the window covering 15.
- an opposite axially manual force is applied to the driving unit 3, such as an upwardly lifting force, the sleeve shell is raised relative to the actuating unit 4 to the non-pressed position illustrated in Fig. 3 .
- the upwardly lifting force is continued to apply to the driving unit 3 to move the actuating unit 4 upwardly with the driving unit 3 while leaving the rotating shaft 2 nonrotated because of the rollable contact of the force transmitting members 42 with the thread segment 21.
- the driving unit 3 and the actuating unit 4 are raised to reach a relatively higher position, the downwardly pulling force is further applied to the driving unit 3 so as to move the actuating unit 4 to the pressed position for further rotating the rotating shaft 2.
- the rotating shaft 2 When it is desired to wind down the window covering 15, the rotating shaft 2 is rotated manually in a counterclockwise direction about the upright axis. By the weight of the window covering 15, the user can rotate the rotating shaft 2 in the counterclockwise direction effortlessly.
- the operating device of the embodiment has a simple construction, and is operable conveniently and effortlessly, particularly being used for winding a relatively long window covering.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Description
- This invention relates to a window blind, more particularly to an operating device for rotating a winding roller of a window blind to wind up a window covering.
- A conventional window blind generally includes a winding roller, a window covering extending downwardly from the roller, and a ring chain (or cord) disposed on an end portion of the roller and extending downwardly. A user can pull the ring chain to rotate the winding roller such that the window covering can be raised or lowered. However, such ring chain poses choking or strangulation hazards to young children. Another window blind such as those disclosed in
EP Application No. 10157918 U. S. Patent Application No. 12/696173 , is provided with an operating rod to replace the ring chain. The operating rod extends vertically and has an upper end coupled with a winding roller by a rotation transmitting mechanism such that vertical rotation of the operating rod results in horizontal rotation of the winding roller, and a lower end coupled with a hinged handle which can be manipulated to rotate the operating rod. Since the hinged handle is disposed remote from the winding roller, it is hard for a force applied to the hinged handle to be transmitted to the rotation transmitting mechanism, thereby rendering operation of the operating rod laborious and inefficient. - In
EP 0 095 108 A2 , an apparatus for simultaneously closing and opening a group of blinds is disclosed and has drive means connected to a horizontally axis of rotation. The drive means is provided with means for limiting the torque upon the turning movement of the slats so as to prevent damage to the gear box of the drive means. - In a co-pending
U.S. Patent Application No. 13/036,066 , entitled "Operating Device for Rotating a Winding Roller of a Window Blind," filed by the applicant, there is disclosed an upright rotating shaft which is operated to rotate by means of engagement between a sleeve shell and one of upper and lower coupling members. - It is desirable to improve the aforesaid operating device to simplify the structure thereof.
- An object of the present invention is to provide an operating device which is operable easily and smoothly and which has a simple construction to facilitate manufacture.
- According to this invention, the operating device includes a rotating shaft having a shaft end which is adapted to be coupled with a winding roller such that a rotation of the rotating shaft about an upright axis results in horizontal rotation of the winding roller for winding up or winding down a window covering, and a shaft body which extends from the shaft end along the upright axis and which has a thread segment formed on an outer shaft surface thereof. A sleeve shell is disposed to surround and permit the shaft body to be rotatable relative thereto so as to cooperatively define an accommodation space. The sleeve shell has a surrounding wall that extends in a direction of upright axis to terminate at first and second peripheral ends, and that includes first and second surrounding segments respectively proximate to the first and second peripheral ends. A carrier has an annular seat wall that surrounds the thread segment, and an actuated annular wall that surrounds the annular seat wall and that extends in the direction of upright axis to terminate at first and second actuated ends. The carrier is disposed in the accommodation space and is movable along the upright axis between a pressed position, where the first peripheral end is in pressing engagement with the first actuated end, and a non-pressed position, where the second actuated end rests on the second peripheral end. A force transmitting member is carried on the annular seat wall and is engaged with the thread segment. A rotation preventing unit is disposed between the first surrounding segment and the actuated annular wall such that, when the carrier is in the pressed position, an axially manual force applied to the surrounding wall is transmitted to move the actuated annular wall along the upright axis so as rotate the rotating shaft about the upright axis through engagement of the force transmitting member with the thread segment, thereby winding up the window covering.
- Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment of the invention, with reference to the accompanying drawings, in which:
-
Fig. 1 is a fragmentary perspective view of the preferred embodiment of an operating device according to this invention incorporated in a window blind; -
Fig. 2 is a fragmentary exploded perspective view of the preferred embodiment; -
Fig. 3 is a fragmentary sectional view of the preferred embodiment when an actuating unit is in a non-pressed position; -
Fig. 4 is a fragmentary sectional view of the preferred embodiment when the actuating unit is in a pressed position; -
Fig. 5 is a cross-sectional view taken along line 5-5 ofFig. 4 ; and -
Fig. 6 is a cross-sectional view taken along line 6-6 ofFig. 3 . - Referring to
Figs. 1 to 3 , the preferred embodiment of anoperating device 10 according to the present invention is shown to be mounted on a window blind 1 for rotating awinding roller 14 of the window blind 1. The window blind 1 includes a horizontal extendingheadrail 11, two mounts 12 (only one is shown inFig. 1 ) spacedly disposed on theheadrail 11, two rotary sleeves 13 (only one is shown inFig. 1 ) rotatably mounted between themounts 12, thewinding roller 14 operatively coupled with therotary sleeves 13 to be rotatable relative to theheadrail 11 about a horizontal axis for winding up or winding down a window covering 15, and acoupling mechanism 16 operatively coupled with one of therotary sleeves 13, and having a connectingend 161. Theoperating device 10 of this invention is connected to the connectingend 161, and is shown to comprise arotating shaft 2, adriving unit 3, anactuating unit 4, and a rotation preventing unit. - The rotating
shaft 2 has ashaft end 22 which is adapted to be connected to the connectingend 161 of thecoupling mechanism 16 such that a rotation of the rotatingshaft 2 about an upright axis transverse to the horizontal axis results in a horizontal rotation of thewinding roller 14, and ashaft body 24 which extends from theshaft end 22 along the upright axis and which has athread segment 21 formed on an outer shaft surface thereof. - The
driving unit 3 includes first andsecond shell halves protrusions shaft body 24 to be rotatable relative thereto so as to cooperatively define anaccommodation space 32. The first andsecond shell halves segments direction 20 of the upright axis to terminate at first and secondperipheral ends second shell halves holes peripheral ends shaft body 24. - The actuating
unit 4 is movably disposed in theaccommodation space 32, and includes acarrier 41 and a plurality offorce transmitting members 42. - The
carrier 41 includes abearing seat member 410 and an actuatedcap member 411. Thebearing seat member 410 has anannular seat wall 416 that surrounds thethread segment 21 and that has a plurality ofbearing surfaces 419 angularly displaced from each other and facing upward to respectively form a plurality ofrecesses 418. The actuatedcap member 411 has an actuatedannular wall 412 which surrounds theannular seat wall 416 and which extends in thedirection 20 of upright axis to terminate at first and second actuatedends inner flange 413 which extends inwardly and radially from the first actuatedend 4121. The actuatedannular wall 412 of the actuatedcap member 411 is engaged with theannular seat wall 416 of thebearing seat member 410 by a spline structure, such as a plurality of recesses andprotrusions carrier 41 is movable along the upright axis between a pressed position (Fig. 4 ), where the firstperipheral end 311 is in pressing engagement with the first actuatedend 4121 and theinner flange 413, and a non-pressed position (Fig. 3 ), where the second actuatedend 4122 rests on the secondperipheral end 331. - The
force transmitting members 42 are in the form ofballs 42 which are received in therecesses 418, respectively, to be rotatably engaged on thebearing surfaces 419, respectively, which are held by theinner flange 413, and which are in rollable contact with thethread segment 21. - Alternatively, the
force transmitting members 42 may be integrally formed with thecarrier 41. - The rotation preventing unit includes a plurality of
blocking bars 313 which project radially and inwardly from the first surroundingsegment 312 of thefirst shell half 31 and which are angularly displaced from each other, and a plurality of blockedprotrusions 414 which are configured to be engageable and blocked by theblocking bars 313 in a circumferential direction about the upright axis when thecarrier 41 is in the pressed position, as shown inFigs. 4 and5 . - Referring to
Figs. 3 to 5 , when an axially manual force is applied to thedriving unit 3, such as a downwardly pulling force, the sleeve shell is moved downwardly relative to the actuatingunit 3 to the pressed position illustrated inFig. 4 . The downwardly pulling force is continued to apply to thedriving unit 3 such that the actuatingunit 4 is moved downward with thedriving unit 3. In the meantime, by virtue of the rotation preventing unit which can prevent rotation of thecarrier 41 relative to the sleeve shell, the downwardly pulling force is transmitted to move the actuatingunit 4 along the upright axis so as to spirally rotate therotating shaft 2 in a clockwise direction about the upright axis through the engagement of theforce transmitting members 42 with thethread segment 21, thereby winding up the window covering 15. - Referring to
Figs. 3 ,4 and6 , once thedriving unit 3 and the actuatingunit 4 are lowered to reach a relatively lower position while the winding-up action of the window covering 15 has yet to be completed, an opposite axially manual force is applied to thedriving unit 3, such as an upwardly lifting force, the sleeve shell is raised relative to the actuatingunit 4 to the non-pressed position illustrated inFig. 3 . The upwardly lifting force is continued to apply to thedriving unit 3 to move the actuatingunit 4 upwardly with thedriving unit 3 while leaving therotating shaft 2 nonrotated because of the rollable contact of theforce transmitting members 42 with thethread segment 21. When thedriving unit 3 and the actuatingunit 4 are raised to reach a relatively higher position, the downwardly pulling force is further applied to thedriving unit 3 so as to move the actuatingunit 4 to the pressed position for further rotating the rotatingshaft 2. - When it is desired to wind down the window covering 15, the rotating
shaft 2 is rotated manually in a counterclockwise direction about the upright axis. By the weight of the window covering 15, the user can rotate therotating shaft 2 in the counterclockwise direction effortlessly. - Accordingly, the operating device of the embodiment has a simple construction, and is operable conveniently and effortlessly, particularly being used for winding a relatively long window covering.
Claims (7)
- An operating device (10) for rotating a winding roller (14) of a window blind (1), the winding roller (14) being rotatable relative to a headrail (11) about a horizontal axis for winding up or winding down a window covering (15), said operating device (10) comprising:a rotating shaft (2) having a shaft end (22) which is adapted to be coupled with the winding roller (14) such that a rotation of said rotating shaft (2) about an upright axis transverse to the horizontal axis results in horizontal rotation of the winding roller (14), and a shaft body (24) which extends from said shaft end (22) along the upright axis, characterized in that:said shaft body (24) has a thread segment (21) formed on an outer shaft surface thereof;said operating device (10) further comprises:a sleeve shell (31, 33) which is disposed to surround and permit said shaft body (24) to be rotatable relative thereto so as to cooperatively define an accommodation space (32), and which has a surrounding wall that extends in a direction (20) of upright axis to terminate at first and second peripheral ends (311, 331), and that includes first and second surrounding segments (312, 332) respectively proximate to said first and second peripheral ends (311, 331);a carrier (41) which has an annular seat wall (416) that surrounds said thread segment (21), and an actuated annular wall (412) that surrounds said annular seat wall (416) and that extends in the direction (20) of upright axis to terminate at first and second actuated ends (4121, 4122), said carrier (41) being disposed in said accommodation space (32) and movable along the upright axis between a pressed position, where said first peripheral end (311) is in pressing engagement with said first actuated end (4121), and a non-pressed position, where said second actuated end (4122) rests on said second peripheral end (331);a force transmitting member (42) which is carried on said annular seat wall (416) and which is engaged with said thread segment (21); anda rotation preventing unit (313, 414) disposed between said first surrounding segment (312) and said actuated annular wall (412) such that, when said carrier (41) is in the pressed position, an axially manual force applied to said surrounding wall is transmitted to move said actuated annular wall (412) along the upright axis so as to rotate said rotating shaft (2) about the upright axis through engagement of said force transmitting member (42) with said thread segment (21), thereby winding up the window covering (15).
- The operating device according to Claim 1, characterized in that said force transmitting member (42) is rotatably carried on said annular seat wall (416) to be in rollable contact with said thread segment (21).
- The operating device according to Claim 2, characterized in that said carrier (41) includes a bearing seat member (410) which has said annular seat wall (416) thathasabearingsurface (419) facing upward to permit said force transmitting member (42) to be rotatably engaged thereon, and an actuated cap member (411) which has said actuated annular wall (412) and an inner flange (413) that extends inwardly and radially from said first actuated end (4121), that confronts said bearing surface (419) to hold said force transmitting member (42), and that abuts against said first peripheral end (311) to transmit the axially manual force to said force transmitting member (42).
- The operating device according to Claim 3, characterized in that said rotation preventing unit (313, 414) includes a plurality of blocking bars (313) projecting radially and inwardly from said first surrounding segment (312), and a plurality of blocked protrusions (414) configured to be engageable and blocked by said blocking bars (313), respectively, in a circumferential direction about the upright axis so as to prevent rotation of said carrier (41) relative to said sleeve shell (31, 33) when the manually axial force is applied to said surrounding wall, thereby making a spiral rotation of said thread segment (21) about the upright axis.
- The operating device according to Claim 3, characterized in that said actuated annular wall (412) of said actuated cap member (411) is engaged with said annular seat wall (416) of said bearing seat member (410) by a spline structure.
- The operating device according to Claim 3, characterized in that said sleeve shell (31, 33) includes first and second shell halves (31, 33) which respectively have said first and second surrounding segments (312, 332) and which are engaged with each other by a spline structure.
- The operating device according to Claim 6, characterized in that said first and second shell halves (31, 33) respectively define first and second penetrating holes (314, 334) formed at said first and second peripheral ends (311, 331) for passage of said shaft body (24).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11192452.8A EP2602422B1 (en) | 2011-12-07 | 2011-12-07 | Operating device for rotatitng a winding roller of a window blind |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11192452.8A EP2602422B1 (en) | 2011-12-07 | 2011-12-07 | Operating device for rotatitng a winding roller of a window blind |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2602422A1 EP2602422A1 (en) | 2013-06-12 |
EP2602422B1 true EP2602422B1 (en) | 2015-07-15 |
Family
ID=45093616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11192452.8A Not-in-force EP2602422B1 (en) | 2011-12-07 | 2011-12-07 | Operating device for rotatitng a winding roller of a window blind |
Country Status (1)
Country | Link |
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EP (1) | EP2602422B1 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE404394B (en) * | 1977-11-25 | 1978-10-02 | Carlsson Leif Sture Ingemar | DEVICE WITH SEVERAL WIDTHS ARRANGED LONGLIGHT AND AROUND A LENGTH AXLE TURNABLE SLAMES |
SE450143B (en) * | 1982-05-21 | 1987-06-09 | Ambient Energy Design | DEVICE FOR SIMILAR OPENING AND CLOSING OF GROUP OF BLINDERS |
-
2011
- 2011-12-07 EP EP11192452.8A patent/EP2602422B1/en not_active Not-in-force
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EP2602422A1 (en) | 2013-06-12 |
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