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:
Mar. 03, 2026
Filed:
Jun. 28, 2021
Applicant:
Mestek Machinery, Inc., Westfield, MA (US);
Inventors:
David Krivanek, Cedar Rapids, IA (US);
Timothy Aaron Coon, Lisbon, IA (US);
Assignee:
Mestek Machinery, Inc., Westfield, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 13/14 (2006.01); B21D 19/00 (2006.01); B21D 39/02 (2006.01); F16L 23/14 (2006.01);
U.S. Cl.
CPC ...
F16L 13/14 (2013.01); B21D 19/00 (2013.01); B21D 39/02 (2013.01); B21D 39/023 (2013.01); F16L 23/14 (2013.01);
Abstract
The present invention provides a method for producing a full engagement Pittsburgh male lock using specific cutting assemblies and protocols that reduce the amount of metal that is removed from the male portion of the corner notches in the duct. Forming of the male portion of the lock is done after the connecting flange forming has been completed as opposed to before the connecting flange forming has been completed.