US 11,904,394 B2
Interface for powered pipe-working tools
Scott Kruepke, Valley City, OH (US); Seth B. Bullock, Cleveland, OH (US); Glen R. Chartier, Avon Lake, OH (US); Katherine Hall, North Ridgeville, OH (US); and Robert Skrjanc, Lorain, OH (US)
Assigned to Ridge Tool Company, Elyria, OH (US)
Filed by Ridge Tool Company, Elyria, OH (US)
Filed on May 11, 2021, as Appl. No. 17/316,802.
Application 17/316,802 is a continuation in part of application No. 16/661,629, filed on Oct. 23, 2019, granted, now 11,691,208.
Claims priority of application No. 201821040602 (IN), filed on Oct. 27, 2018.
Prior Publication US 2021/0260673 A1, Aug. 26, 2021
Int. Cl. B23D 47/04 (2006.01); B23D 47/02 (2006.01); B23D 45/12 (2006.01)
CPC B23D 47/045 (2013.01) [B23D 45/126 (2013.01); B23D 47/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An interlock system for a saw or a pipe-working tool defining a receiving aperture, the interlock system comprising:
a positionable plunger positionable between an extended state in which the plunger extends into the receiving aperture, and a retracted state in which the plunger does not extend into the receiving aperture; and
an interlock switch defining an open position when current does not flow and a closed position when current flows and including electrical contacts,
wherein an operational state of the electrical contacts varies depending upon the position of the plunger relative to the receiving aperture.