Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly
Reexamination Certificate
2007-12-25
2007-12-25
Mai, Lanna (Department: 3637)
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
C052S118000, C052S632000, C052S108000, C052S646000, C052S121000, C052S652100, C212S295000
Reexamination Certificate
active
09960537
ABSTRACT:
The present invention is an improved apparatus and method for forming a retractable tower or column. The present invention includes pointed hooks wherein the hooks are attached to each section of a section chain, one in a horizontal direction and one in an off-set manner. The section chains are placed on a take up mechanism in an operable position and then raised utilizing a motor. As the section chains are raised, they are guided by a guide tower, rollers, shims, and gear racks into a position whereby hooks from adjacent sections of the section chains form coupled engagements. The coupled engagement of the hooks of the sections of each adjacent section chains thereby form the column.
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A Phi Dieu Tran
Faegre & Benson LLP
Mai Lanna
Tower Solutions, LLC
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