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:
Oct. 25, 1994
Filed:
Sep. 24, 1993
Applicant:
Inventor:
Lamont R McClain, St. Louis, MO (US);
Assignee:
Engel Industries, Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ;
U.S. Cl.
CPC ...
138109 ; 138155 ; 138120 ; 138D / ; 285405 ; 285363 ;
Abstract
Modifying that type of integral flange outstanding from a sheet metal duct characterized by an outstanding first width of sheet metal and a second substantially equal width bent reversedly back to extend at 180.degree. from the first, in the present flange a sheet edge margin is bent reversedly back and inwardly between the second and first such widths. As compared to prior art flanges, this results in substantially lessened deflections under internal duct pressures without appreciable increase in sheet metal used. An added advantage is that the sheet metal edge is positioned so that it cannot endanger workmen's hands.