US 12,243,704 B2
Rotary lockout tagout latch system
Shawn Cloran, Wauwatosa, WI (US); and Darrell Filtz, Cedarburg, WI (US)
Assigned to Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US)
Filed by Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US)
Filed on Feb. 25, 2022, as Appl. No. 17/681,253.
Prior Publication US 2023/0274895 A1, Aug. 31, 2023
Int. Cl. H01H 9/20 (2006.01); H01H 9/16 (2006.01); H01H 9/18 (2006.01); H01H 9/22 (2006.01); H01H 9/28 (2006.01); H01H 71/56 (2006.01)
CPC H01H 9/223 (2013.01) [H01H 9/161 (2013.01); H01H 9/18 (2013.01); H01H 9/282 (2013.01); H01H 71/56 (2013.01); H01H 2071/565 (2013.01); H01H 2219/036 (2013.01); H01H 2219/0621 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A latch system for an electrical equipment enclosure, said latch system comprising:
a latch arm receiver adapted to be connected to an associated enclosure door; and
a latch arm assembly adapted to be connected in operative engagement with an associated circuit breaker, said latch arm assembly comprising:
a chassis;
a latch arm that moves relative to the chassis between: (i) a first arm position; (ii) a second arm position; and (iii) an intermediate arm position between the first arm position and the second arm position;
a latch arm spring that biases the latch arm toward its first arm position;
a handle rotatably connected to the chassis and operatively connected to a toggle of the associated circuit breaker, said handle movable to and between an ON handle position, a TRIP handle position, an OFF handle position, and a RESET handle position;
said handle operatively connected to said latch arm such that said latch arm is positioned in said second arm position when said handle is located in said RESET handle position, wherein said latch arm spring biases said latch arm into one of said first arm position and said intermediate arm position when said handle is in any one of said ON handle position, said TRIP handle position, and said OFF handle position; and
a lockout plunger connected to the handle to rotate with the handle and movable between a disengaged position and an engaged position, wherein said lockout plunger prevents movement of the handle from the OFF handle position to the ON handle position when the lockout plunger is in its engaged position.