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:
Jun. 27, 1989
Filed:
Aug. 03, 1987
Daniel E Whitney, Arlington, MA (US);
The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US);
Abstract
A method of fabricating elbow conduit including constructing a conduit development having a set of sequential segments, each segment having a lateral axis parallel to corresponding lateral axes of the other segments and a longitudinal axis skewed at least in part with respect to the lateral axis and having the same orientation as the corresponding longitudinal axes of the other segments in the set. The segments are joined end-to-end and the dimensions of the joined segments are transferred to a continuous length of material to generate a continuous blank havng periodically varying opposing boundaries. At least one outer alignment mark is defined on each segments of the blank to establish an outer ridge line on the outside circumference of the elbow and at least one inner alignment mark is defined on each segment to establish an inner ridge line on the inner circumference of the elbow. The method further includes helically winding the continuous blank to align the inner and outer alignment marks and join the abutting boundaries to form an elbow conduit. Helically wound elbow conduits formed from a continuous blank having curvilinear or rectilinear opposing boundaries are also disclosed.