Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Patent
1992-07-10
1994-03-15
Johnson, Blair M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
160177, 464 30, 403383, E06B 926
Patent
active
052939219
ABSTRACT:
A drape or blind assembly having a headrail in which there is disposed a shaft, on rotation of which the position of the drapes or blind slats is adjusted, and a transmission mechanism having a housing and a drive gear supported by the housing in the headrail with the drive gear coaxial with the axis of the shaft and a rigid one piece coaxial coupling coupled between the shaft and the gear so that normal rotation of the drive gear causes rotation of the shaft. If, however, the drive gear is rotated past a predetermined rotational position, a stop member generally provided on the coupling engages an abutment member to prevent further rotation of the shaft. To prevent damage to the mechanism in such a situation, the mechanism includes a recess defined by first drive surfaces and resilient arms having complementary second drive surfaces. On continued rotation of the drive gear after the stop member has engaged the abutment member, the resilient arms flex to permit relative rotation of the first and second drive surfaces. Bearings are provided in the headrail for rotatably supporting the shaft, and retaining it in position.
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