IT1166607B - Actuator and lock for roller blind - has cam driven ball bearings to force friction locking surfaces apart under rotational force - Google Patents
Actuator and lock for roller blind - has cam driven ball bearings to force friction locking surfaces apart under rotational forceInfo
- Publication number
- IT1166607B IT1166607B IT1980279A IT1980279A IT1166607B IT 1166607 B IT1166607 B IT 1166607B IT 1980279 A IT1980279 A IT 1980279A IT 1980279 A IT1980279 A IT 1980279A IT 1166607 B IT1166607 B IT 1166607B
- Authority
- IT
- Italy
- Prior art keywords
- roller blind
- ball bearings
- force
- actuator
- lock
- Prior art date
Links
- 230000003247 decreasing effect Effects 0.000 abstract 1
Landscapes
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
- Blinds (AREA)
Abstract
The roller blind has an actuating mechanism by which the roll shaft may either be rotated or locked in position. The mechanism comprises a fixed hub and a rotating hub, the latter being attached to the blind shaft and equipped with a compressed elastic element which pushes a friction face on the rotating hub into contact with a friction face on the fixed hub. The actuating pulley encompasses the two hubs and has an inner face with cam surfaces which, under a rotary action, cause ball bearings to work against the pressure exerted by the elastic element and lift the two friction faces apart so that the rotating hub can then rotate freely. The friction faces pref. offer a radially decreasing cross-sectional clearance so that the action of pushing the bearings inwards forces the two faces apart. The actuating mechanism enables the roller blind to be locked in any position and also to be extended or withdrawn without having to overcome any frictional forces in the locking device.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1980279A IT1166607B (en) | 1979-02-01 | 1979-02-01 | Actuator and lock for roller blind - has cam driven ball bearings to force friction locking surfaces apart under rotational force |
EP79100913A EP0004629B1 (en) | 1978-04-04 | 1979-03-27 | Operating and locking device for roller blinds |
DE7979100913T DE2961403D1 (en) | 1978-04-04 | 1979-03-27 | Operating and locking device for roller blinds |
ES1979242415U ES242415Y (en) | 1978-04-04 | 1979-04-02 | DRIVING DEVICE FOR ROLLING PERSONS. |
AT79101592T ATE1406T1 (en) | 1978-04-04 | 1979-05-23 | CONNECTING ARRANGEMENT FOR VARIABLE COMBINATION OF FURNITURE. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1980279A IT1166607B (en) | 1979-02-01 | 1979-02-01 | Actuator and lock for roller blind - has cam driven ball bearings to force friction locking surfaces apart under rotational force |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7919802A0 IT7919802A0 (en) | 1979-02-01 |
IT1166607B true IT1166607B (en) | 1987-05-05 |
Family
ID=11161344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT1980279A IT1166607B (en) | 1978-04-04 | 1979-02-01 | Actuator and lock for roller blind - has cam driven ball bearings to force friction locking surfaces apart under rotational force |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1166607B (en) |
-
1979
- 1979-02-01 IT IT1980279A patent/IT1166607B/en active
Also Published As
Publication number | Publication date |
---|---|
IT7919802A0 (en) | 1979-02-01 |
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