Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Reexamination Certificate
2007-07-10
2010-12-28
Johnson, Blair M. (Department: 3634)
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
C160S170000, C160S084020
Reexamination Certificate
active
07857030
ABSTRACT:
A window covering switchable to manual operation and electrical operation includes at least an upper elongated member, a lower elongated member, a shade lift cord assembly, an electric transmission assembly, a clutch and an automatic retraction means. The electric transmission assembly is coupled with the clutch through an axle of a gear box to drive a driving gear thereon to rotate. The driving gear is engaged with a driven gear pivotally coupled with the automatic retraction means to form a synchronous transmission thereby to control retraction and extension of the electric window covering. When electric power is not available manual operation may be switched through the clutch to extend or retract the window covering.
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Johnson Blair M.
Muncy Geissler Olds & Lowe, PLLC
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