Movable or removable closures – With operator for movably mounted closure – Operator drives closure along guide
Patent
1998-08-07
2000-05-16
Redman, Jerry
Movable or removable closures
With operator for movably mounted closure
Operator drives closure along guide
E05F 1100
Patent
active
060619651
ABSTRACT:
A door operator system for slidable doors comprises an expandable and retractable lattice assembly adapted for connection between a door and a stationary structure. The lattice assembly includes forward and rearward link arms connected together at a pivot joint to form a link arm pair. Several link arm pairs may be pivotally joined together to form the expandable and retractable lattice assembly, such that the distance between a retracted position and an expanded position of the lattice assembly is relatively long. An actuator with a relatively short stroke length has a housing and a shaft that reciprocates with respect to the housing between retracted and extended positions. The housing is connected to a pivot joint of one pair of link arms and the reciprocal shaft is connected to a juxtaposed pivot joint of another pair of link arms. With this arrangement, movement of the shaft over the relatively short stroke length causes the lattice assembly to move between the retracted and expanded positions over the relatively long distance, thereby causing movement of the door with respect to the stationary structure over the relatively long distance. Pneumatic control circuitry for controlling operation of the door and safety features are disclosed.
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Redman Jerry
Wirthlin Alvin R.
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