Flexible or portable closure – partition – or panel – Plural and/or with rigid closure – Plural strip – slat – or panel assemblies
Reexamination Certificate
2007-11-20
2007-11-20
Purol, David (Department: 3634)
Flexible or portable closure, partition, or panel
Plural and/or with rigid closure
Plural strip, slat, or panel assemblies
C160S16810R
Reexamination Certificate
active
11092924
ABSTRACT:
A Venetian blind slat control mechanism comprises a set of first string ladders suspended between a head rail and a bottom rail of a Venetian blind for holding a plurality of equally spaced slats thereon before respectively fixed onto a pair of adjusting seats that, having an adjusting shaft mounted thereon, are accommodated at both ends of the head rail therein to tilt the slats into different angles thereby. A lift cord is applied to sequentially thread through cord passages of each slat before wound and suspended from a first pulley seat adapted at one end of the head rail to raise or lower the slats thereby. Between the adjusting seats inside the head rail is situated a positioning seat with a set of guide sliding members accommodated at both sides thereof in linking movement with a linkage actuating plate controlled by an operational cord that is wound and suspended from a second pulley seat adapted at the other end of the head rail. A set of second string ladders whose upper ends are respectively fixed to the guide sliding members thereof are mounted to extend downwards in a U-shaped form to cross the bottom rail, and multiple positioning steps of the second string ladder are applied to hold in place every even/odd-numbered slats thereby. Therefore, the operational cord is simply drawn to trigger the linkage mechanism and synchronically lift the second string ladders so as to alternatively collect and arrange the slats in pairs, facilitating an easier and speedier operation thereof to achieve the best using status.
REFERENCES:
patent: 2117953 (1938-05-01), Grau
patent: 3100013 (1963-08-01), Randmark
patent: 4377194 (1983-03-01), Tsuhako
patent: 6648048 (2003-11-01), Lai
patent: 7100664 (2006-09-01), Hsu
patent: 7159636 (2007-01-01), Liang
Chan Law Group LLP
Purol David
LandOfFree
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