Abstract: A drum brake (10) is provided which has a pair of brake pads (12), each pad being moveable generally radially outwardly into contact with a brake drum by a respective operating lever (14) which is acted on at one end by a brake applying means (15) and pivoted (16) at the other end from a backplate (11). Each pad is contacted by a portion (14c) of the respective operating lever intermediate the lever ends and is moved radially outwardly between a pair of circumferentially spaced abutments (45) which extend generally perpendicular to the backplate (11) and which react braking torque when the brake is applied. The required pad to drum clearance is established by knock-back of the drum on the pads (12).

Abstract: A brake shoe assembly (1) for a drum brake, the brake shoe assembly being a single-piece construction and including a brake shoe (2) of generally circular form having two separate and opposed ends (17, 18), and defining a pair of friction lining mounting sections (11, 12) disposed on opposite sides of the brake shoe (2). The friction lining mounting sections (11, 12) have a T-shaped cross-sectional form defining an arcuate, radially outer platform (15) for mounting a friction lining (16) and a radially inwardly extending web (14). The brake shoe (2) including hinge means (27, 28) between the lining mounting sections (11, 12), facilitating pivoting movement of the lining mounting sections (11, 12), to alter the separation between the brake ends (17, 18) between a brake operative condition in which in use, the friction lining (16) engages a braking surface of a drum to which the brake shoe assembly (1) is fitted, and a brake inoperative condition in which there is no such engagement.

Abstract: A drum brake having a support plate (10) with first and second shoes (12,14) slidably mounted thereon. Each of the shoes (12,14) having a web (12a,14a) and a rim (12b,14b) with a face for receiving a friction lining (16,18). Each web (12a,14a) has a first end and a second end. The rim holds the friction lining in a position to engage a drum (20) in response to an input force applied to the first end of the webs (12a,14a) of the shoes (12,14) by a hydraulic actuation device (22). A bearing member (28) is secured to the support plate (10) and is connected to a second end of the webs (12a,14a). A spacer device (40) arranged in the vicinity of the hydraulic device has a variable length to establish a spacing between the shoes (12,14) and drum (20). A mechanical actuation device (50) secured to a web (14a) of shoe (14) has a first actuation lever (60) and a second lever (70).