Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent
1990-03-26
1991-07-30
Chilcot, Jr., Richard E.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
52111, 52632, 343903, B66C 508, B66C 1322
Patent
active
050350943
ABSTRACT:
An axially extensible and retractable structure including a plurality of cylindrical, threadedly engaged elements rotatable relative to one another for movement between axially extended and retracted positions together with a plurality of non-rotatable, telescoping segments. Preferably, none of the threads is exposed on the outside of the structure as the elements are moved between their extended and retracted positions. The structure is described in several embodiments, some with the telescoping segments positioned within the threaded elements, and some with the threaded elements within the segments which, in one embodiment, is adapted to support another element such as a boat sail, along its axial length. Also disclosed is a preferred method for fabricating the threaded elements utilizing relatively strong, light-weight materials such as carbon fiber impregnated with a curable epoxy resin.
REFERENCES:
patent: 4062156 (1977-12-01), Roth
patent: 4542383 (1985-09-01), Casey et al.
patent: 4594824 (1986-06-01), Ziegler et al.
patent: 4871138 (1989-10-01), Sauter
Chilcot Jr. Richard E.
McGuire Charles S.
Nguyen Kien T.
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