US 11,725,423 B2
Quiet latch for a locking device
Bhargav Yalamati, Hyderabad (IN); Chetan V, Bangalore (IN); Sachin Chandra Shetty, Bangalore (IN); and Prabhat Kumar Yadav, Bangalore (IN)
Assigned to Schlage Lock Company LLC, Carmel, IN (US)
Filed by Schlage Lock Company LLC, Carmel, IN (US)
Filed on Nov. 24, 2020, as Appl. No. 17/103,311.
Application 17/103,311 is a division of application No. 15/363,180, filed on Nov. 29, 2016, granted, now 10,844,637.
Prior Publication US 2021/0148141 A1, May 20, 2021
Int. Cl. E05B 65/10 (2006.01); E05B 17/00 (2006.01); E05C 19/02 (2006.01); E05C 21/00 (2006.01); E05B 77/42 (2014.01); E05B 17/20 (2006.01)
CPC E05B 65/1046 (2013.01) [E05B 17/0041 (2013.01); E05B 65/1053 (2013.01); E05B 65/1086 (2013.01); E05C 19/02 (2013.01); E05C 21/00 (2013.01); E05B 17/002 (2013.01); E05B 17/0045 (2013.01); E05B 17/2084 (2013.01); E05B 77/42 (2013.01); Y10T 292/0871 (2015.04); Y10T 292/0908 (2015.04); Y10T 292/0909 (2015.04)] 19 Claims
OG exemplary drawing
 
1. An exit device for a door located at a door frame having a door strike, comprising:
a pushbar having a released position and a depressed position, the pushbar defining a longitudinal axis;
a latchbolt assembly disposed along the longitudinal axis and including an extended position configured to engage the door strike and a retracted position configured to move past the door strike, wherein movement of the pushbar from the released position to the depressed position moves the latchbolt assembly from the extended position to the retracted position;
a first bell crank mechanism operatively connected to the pushbar and disposed along the longitudinal axis at a first location, and a second bell crank mechanism operatively connected to the pushbar and disposed along the longitudinal axis at a second location, and wherein the first bell crank mechanism is located between the latchbolt assembly and the second bell crank mechanism; and
a dampening device disposed along the longitudinal axis between the latchbolt assembly and the first bellcrank assembly, and wherein the dampening device is configured to restrain movement of the latchbolt assembly during movement from the retracted position to the extended position.