US 11,053,992 B2
Drum brake apparatus
Moo Jin Choi, Yongin-si (KR)
Assigned to HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed by HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed on Feb. 21, 2019, as Appl. No. 16/281,571.
Claims priority of application No. 10-2018-0096269 (KR), filed on Aug. 17, 2018.
Prior Publication US 2020/0056667 A1, Feb. 20, 2020
Int. Cl. F16D 51/24 (2006.01); F16D 51/22 (2006.01); B60T 1/06 (2006.01); F16D 65/22 (2006.01); F16D 51/00 (2006.01); F16D 121/24 (2012.01); F16D 125/06 (2012.01); F16D 125/40 (2012.01); F16D 125/52 (2012.01); F16D 121/04 (2012.01)
CPC F16D 51/24 (2013.01) [B60T 1/067 (2013.01); F16D 51/22 (2013.01); F16D 65/22 (2013.01); F16D 2051/003 (2013.01); F16D 2051/005 (2013.01); F16D 2121/04 (2013.01); F16D 2121/24 (2013.01); F16D 2125/06 (2013.01); F16D 2125/40 (2013.01); F16D 2125/52 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A drum brake apparatus comprising:
a back plate;
brake shoes placed over the back plate;
a housing coupled to the back plate, and comprising a first side facing a first one of the brake shoes, a second side facing a second one of the brake shoes, a main brake piston hole extending between the first side and the second side, and a parking brake rod hole extending between the first side and the second side;
a main brake comprising a pair of pistons installed in the main brake piston hole, the main brake being configured to pressurize the brake shoes using hydraulic pressure during main braking; and
a parking brake comprising at least one rod installed in the parking brake rod hole, the parking brake being configured to pressurize the brake shoes using electromotive force during parking braking.