The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 1991
Filed:
Mar. 26, 1990
David J Legare, New Hartford, NY (US);
Other;
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.