Static structures (e.g. – buildings) – Striplike unit – reversibly flexible and rigid
Patent
1998-01-27
2000-09-05
Friedman, Carl D.
Static structures (e.g., buildings)
Striplike unit, reversibly flexible and rigid
52632, 2423902, 248161, 403364, E04H 1218
Patent
active
061124745
ABSTRACT:
A retractable column formed from a set of at least three flexible webs with each of the webs having a set of teeth located along opposite edges of the webs, each of the teeth having a first ear obliquely extending from a first side and a second ear obliquely extending from a second side, each of the teeth spaced from an adjacent tooth a base distance substantially equal to a root distance of a tooth on the web so that when a tooth on one of the webs is engaged in a neck to neck relationship with a pair of teeth on one of the other webs the teeth on each of the webs engage each other in an interlocking relationship to hold the webs proximate each other to form a rigid column. By flexing a portion of the teeth that are in engagement with each other one can disengage the interlocked teeth and roll the web onto a take up mechanism and similarly, by flexing a portion of the teeth as the teeth are brought into engagement with one another one can force the teeth into interlocking engagement with each other as the web is unrolled from the take up mechanism.
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Articualted Chain Forms triangular lattice Tower, Machine Design Oct. 1, 1959, p. 129.
Friedman Carl D.
Wilkens Kevin D.
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