Drive mechanism, particularly for moving and turning the slats of a blind
OwnerWalter Hugininventor
Life of this patent
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Abstract
A drive mechanism, particularly for moving and turning the slats of a blind, is disclosed. The drive mechanism comprises a suitable drive element for driving one or the other of a first and a second shaft. Connected between the drive element and the first shaft there is connected a freewheel which is contained between two end positions and is in effect during the rotation of the second shaft in both directions. A clutch is connected between the drive element and the second shaft to automatically decouple the second shaft from the drive element on completion of the freewheel action.
Claims20
Drive mechanism, particularly for moving and turning the slats of a blind comprising:
- (a) a rotatable drive element capable of being rotated in either direction.
- (b) a first shaft for operating as a screw drive for shifting the slats of a blind along a guide rail.
- (c) a second reversing shaft for turning slots jointly,
- (d) means for drivingly connecting said rotatable drive element to said first shaft including a freewheel comprising:
- (i) a helical groove on said first shaft,
- (ii) a hollow casing surrounding and spaced from said helical groove and having an axial groove in the interior surface thereof,
- (iii) a rolling body partially in each said groove, and
- (iv) means for drivingly connecting said hollow casing and said rotatable drive element, and
- (e) means for drivingly connecting said rotatable drive element to said second shaft comprising:
- (i) a drive tube,
- (ii) a driven casing surrounding said tube, and
- (iii) means for drivingly coupling said driven casing to said drive tube comprising radially movable blocking elements engaging in one position thereof said drive tube and said casing and in another portion thereof only one of said tube and casing.
Drive mechanism, particularly for moving and turning the slats of a blind comprising:
- (a) rotatable drive element capable of being rotated in either direction.
- (b) a first shaft for operating as a screw drive for shifting the slats of a blind along a guide rail.
- (c) a second reversing shaft for turning slats jointly,
- (d) means for drivingly connecting said rotatable drive element to said first shaft including a freewheel comprising:
- (i) a tubular basic body fixedly connected to the first shaft,
- (ii) a hollow casing surrounding at least a portion of said tubular body and rotatable in either direction by said drive element,
- (iii) radically movable blocking element means for engaging said casing and said body in one position thereof and for engaging only one of said casing and said body in another position thereof to thereby cause conjoint rotational movement of said body by said casing when said blocking element means is in said one position, and
- (iv) means driven by said hollow casing for moving said blocking element means to said one position after a predetermined amount of rotation of said hollow casing from an initial position, and
- (e) means for drivingly connecting said rotatable drive element to said second shaft.
Dependencies are inferred from the claim text.