US 12,343,848 B2
Pittsburgh lock seam opening tool and method
Ronnie Hurst, Lapeer, MI (US)
Assigned to Hurst Sheet Metal, LLC, Lapeer, MI (US)
Filed by Hurst Sheet Metal, LLC, Lapeer, MI (US)
Filed on May 8, 2023, as Appl. No. 18/313,408.
Prior Publication US 2024/0375255 A1, Nov. 14, 2024
Int. Cl. B25B 27/02 (2006.01); B21D 39/02 (2006.01)
CPC B25B 27/02 (2013.01) [B21D 39/025 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A tool for opening a Pittsburgh lock seam channel formed in a ductwork component, the tool comprising:
a frame;
a spreader wheel supported on a first side of the frame for rotation relative thereto; the spreader wheel being coupled to a shaft for imparting rotational motion to the spreader wheel;
the spreader wheel having a peripheral edge configured to be inserted a depth into a mouth of the lock seam channel; and
a guide fixedly supported on the first side of the frame; the guide being spaced apart from the spreader wheel; the guide having a retaining edge configured to engage against a base of the lock seam channel to maintain the spreader wheel at the depth in the lock seam channel,
wherein the guide is a guide wheel, and where the retaining edge is an outer periphery of the guide wheel configured to slide along the base of the lock seam channel.