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US 12,565,947 B2Granted
System and method for forming a full engagement male lock in a ductline
AssigneeMestek Machinery, Inc.
InventorsDavid Krivanek, Timothy Aaron Coon
Life of this patent
Estimating the term…
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.
Claims6
A metal forming apparatus, comprising:
- a frame portion configured to support a metal workpiece;
- a cutting implement portion configured to cut said metal workpiece is cut to form a female lock seam notch in said workpiece;
- a bending portion configured to bend said workpiece with said female lock seam notch into a female lock seam;
- a flange portion configured to form duct connection flanges in said workpiece;
- a male seam forming portion configured to utilize rollers to manipulate said workpiece to define a male lock seam at a position in said metal forming apparatus that is downstream of said frame portion, said cutting implement portion and said bending portion;
- and
- wherein said male seam forming portion forms said male seam along one lateral edge of said workpiece without first notching said one lateral edge.
4 more elements
A duct forming apparatus, comprising:
- a frame portion configured to support a metal workpiece;
- a cutting implement portion configured to cut said workpiece to form a female lock seam notch for said duct, said cutting implement portion being oriented downstream of said frame portion;
- a bending portion configured to bend said workpiece to form a male lock seam for said duct, said bending portion being oriented subsequent to, and downstream of, said cutting implement portion;
- and
- wherein said bending portion forms said male lock seam along one lateral edge of said workpiece without first notching said one lateral edge.
2 more elements
A metal forming apparatus, comprising:
- an accepting portion configured to support a metal workpiece;
- a cutting portion configured to cut a female lock seam notch into said workpiece;
- a bending portion configured to bend said workpiece with said female lock seam notch into a female lock seam;
- a male seam forming portion configured to utilize rollers to manipulate said workpiece to define a male lock seam at a position in said metal forming apparatus that is downstream of said accepting portion, said cutting implement portion and said bending portion;
- and
- wherein said male seam forming portion forms said male seam along one lateral edge of said workpiece without first notching said one lateral edge.
3 more elements
Dependencies are inferred from the claim text.