US 12,275,081 B2
Thread-cutting die head for powered pipe threader
Matthew R. Wolf, Milwaukee, WI (US)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Feb. 16, 2024, as Appl. No. 18/444,296.
Application 18/444,296 is a division of application No. 17/537,723, filed on Nov. 30, 2021, granted, now 11,931,816.
Claims priority of provisional application 63/241,134, filed on Sep. 7, 2021.
Claims priority of provisional application 63/119,973, filed on Dec. 1, 2020.
Prior Publication US 2024/0189931 A1, Jun. 13, 2024
Int. Cl. B23G 5/12 (2006.01); B23G 1/24 (2006.01); B23G 5/08 (2006.01)
CPC B23G 5/12 (2013.01) [B23G 1/24 (2013.01); B23G 5/083 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A thread-cutting die head for a powered pipe threading machine, the thread-cutting die head comprising:
a die carrier, defining a central axis, for supporting a plurality of thread-cutting dies for displacement relative to the central axis in a radially inward direction and radially outward direction;
a cam plate coaxial with the die carrier including a plurality of cam members for engaging with the plurality of thread-cutting dies and displacing the cutting dies in the radially inward direction and radially outward direction in response to relative rotation between the cam plate and the die carrier; and
a locking system including
a positioning screw extending through an arcuate slot in the cam plate,
a cam washer surrounding the positioning screw,
a pin threaded to the positioning screw, and
a cam handle including
a cylindrical cam portion engaged with the cam washer and defining a rotational axis of the handle, and
an aperture in which the pin is slidably received, the aperture defining a longitudinal axis that is offset from the rotational axis of the handle,
wherein rotation of the cam handle in a first direction about the rotational axis is configured to impart a clamping force against the cam washer to lock the rotational position of the cam plate relative to the die carrier.