Brakes – Position adjusters – Slack
Patent
1990-01-09
1991-10-22
Graham, Matthew C.
Brakes
Position adjusters
Slack
188 7963, 188196C, F16D 6552
Patent
active
050587145
ABSTRACT:
An apparatus for a drum brake for mechanically actuatable self-energizing internal shoe-type drum brakes for automotive vehicles. A pair of brake shoes (4, 5) is arranged on a brake carrier plate (27) at a thrust member (6) and furnished with tension springs (7, 10). A mechanical actuating apparatus acts between a pair of brake shoe ends (4, 5) disposed opposite each other and prestressed by springs (7, 10). The mechanical actuating apparatus presses the brake shoes (4, 5) for braking against a brake drum (1) enclosing them and a first automatically clearance compensating adjusting device is arranged between the brake shoe ends as well as a second adjusting device arranged at at least one brake shoe web (12) supporting the brake shoe (5). In order to provide a constant functioning reliability using simple-design, and a low-cost components, while simultaneously eliminating conventional checking and adjusting operations, the adjusting device is comprised of a first adjusting apparatus with a self-adjusting, variable-length pressure strut (39) arranged between the brake shoes (4, 5) and that a second adjusting apparatus is furnished with a self-adjusting adjustment member at a brake shoe web (12) supporting the brake shoe (5), which adjustment member interacts in circumferential direction both with the mechanical actuating device (3) and with a supporting bracket (2).
REFERENCES:
patent: 2286711 (1942-06-01), Buffington
patent: 2476237 (1949-07-01), Buffington
patent: 2889015 (1959-06-01), White
patent: 2981379 (1961-04-01), Burrell
patent: 3090469 (1963-05-01), Buckner
patent: 3150746 (1964-09-01), Rumpf
patent: 3195689 (1965-07-01), Ryskamp
patent: 3223204 (1965-12-01), Choings
patent: 3303908 (1967-02-01), Beirise
patent: 3870131 (1975-03-01), Firth et al.
Endler Wolfgang
Hendrich Uwe
Panek Claus-Peter
Weiler Rolf
Alfred Teves GmbH
Graham Matthew C.
Lewis J. Gordon
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