US 12,297,878 B2
Apparatus for drum brake assembly
Kraig Gerber, Plymouth Township, MI (US); Mauro Marconcin, South Lyon, MI (US); and Paul Wecker, Limburg (DE)
Assigned to ZF ACTIVE SAFETY US INC., Livonia, MI (US); and ZF ACTIVE SAFETY GMBH, Koblenz (DE)
Filed by ZF Active Safety US Inc., Livonia, MI (US); and ZF Active Safety GmbH, Koblenz (DE)
Filed on Apr. 25, 2022, as Appl. No. 17/728,202.
Prior Publication US 2023/0341018 A1, Oct. 26, 2023
Int. Cl. F16D 65/09 (2006.01); F16D 65/10 (2006.01)
CPC F16D 65/09 (2013.01) [F16D 65/10 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An apparatus for a drum brake assembly having a brake drum, comprising:
a brake shoe;
a pivot lever connected to the brake shoe and having a first condition movable with the brake shoe to apply braking force to the brake drum and a second condition deflected relative to the brake shoe for absorbing brake drum contraction forces, wherein a first end of the pivot lever deflects relative to a second end to reach the second condition and the second end is pre-loaded against a fastener connected to the brake shoe;
a wheel cylinder coupled to the first end of the pivot lever for moving the first end of the pivot lever to apply the braking force; and
a lever tip non-rotatably connected to the first end of the pivot lever and engaged by the wheel cylinder for moving the first end of the pivot lever to apply the braking force, the lever tip engaging the brake shoe when the pivot lever is in the first condition and being spaced from the brake shoe when the pivot lever is in the second condition.