초록 ▼

A pull carrier for vertically louvered venetian blinds is disclosed, preferably for use in such blinds having a single drive shaft for transporting the louver carriers along the shaft and also for rotating the louvers about their vertical axes. During rotation of the louvers about their vertical axe

A pull carrier for vertically louvered venetian blinds is disclosed, preferably for use in such blinds having a single drive shaft for transporting the louver carriers along the shaft and also for rotating the louvers about their vertical axes. During rotation of the louvers about their vertical axes by the drive shaft, the pull carrier which effects transport of the louver carriers does not move along the headrail due to a free wheel mechanism comprising a worm and a gear wheel engaged with the worm. The gear ratio of the worm and gear is so selected as to insure that rotation of the louvers about their vertical axes is completed in either of the two opposite directions of rotation before transport of the pull carrier, and subsequently of the louver carriers, can be effected by the drive shaft. Conversely, rotation of the louvers about their vertical axes is avoided during transport of the pull carrier and louver carriers. An overload clutch is provided to protect the blind mechanism when the pull carrier has reached its limit of movement along the headrail in either direction.

대표청구항 ▼

In a louvered venetian blind having a headrail, a plurality of louver carriers mounted in said headrail for movement therealong, a plurality of vertically disposed louvers each supported from one of said louver carriers, a pull carrier for moving the louver carriers along said headrail, drive means

In a louvered venetian blind having a headrail, a plurality of louver carriers mounted in said headrail for movement therealong, a plurality of vertically disposed louvers each supported from one of said louver carriers, a pull carrier for moving the louver carriers along said headrail, drive means for rotating said louvers about their vertical axes and for moving said pull carrier and said louver carriers along said headrail, the improvement comprising said louvers being rotatable about their axes in either direction, stop means for stopping said rotation of said louvers in each direction, a free wheel mechanism carried by said pull carrier driven by said drive means, means for moving said pull carrier along said headrail after said stop means has stopped the rotation of said louvers about their vertical axes in one of said directions, and means for disconnecting said free wheel mechanism from said drive means to prevent movement of said pull carrier along said headrail during all times when said louvers are being rotated about their vertical axes.