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:
Apr. 03, 2012
Filed:
Feb. 12, 2010
Applicants:
Manfred A. A. Lupke, Thornhill, CA;
Stefan A. Lupke, Thornhill, CA;
Inventors:
Manfred A. A. Lupke, Thornhill, CA;
Stefan A. Lupke, Thornhill, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A corrugated pipe having a non circular in cross section profile and at least one generally elongate wall section is improved by using a variable height corrugation in the length of the elongate wall segment. The variable height corrugation is of a greatest height at a center portion thereof and decreases in height towards the end points of the elongate wall segment. A spanning type truss arrangement is formed that opposes inward deflection of the straight wall segment.