US 5,819,887 AGranted

Drum brake device

AssigneeNisshinbo Industries, Inc.

InventorsSeiji Asai, Nobuhisa Arai, Yasushi Kobayashi

Life of this patent

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Abstract

A drum brake device having a single brake shoe mounted to be movable on top of the back plate. One end of the brake shoe abuts against an anchor (10) and the other end interlocks with a shoe clearance adjustment device (14). A link (11) is supported so as to pivot in the central region of the brake shoe (3). One end of the link (11) is interlocked so as to be activated by a service brake actuator (12) itself activated when the service brake is applied, while the other end of the link (11) abuts against the anchor (10). When the brake drum is rotating in one direction, the other end of the brake shoe (3) is supported by the anchor (10), and when the brake drum is rotating in the reverse direction, the one end of the brake shoe (3) is supported by the shoe clearance adjustment device (14).

Claims11

Dependent claims

A drum brake device for a brake drum comprising:

a back plate;
an anchor mounted on said back plate;
a shoe clearance adjustment device mounted said back plate;
a single brake shoe mounted to be movable on top of the back plate, one end of said brake shoe abutting and interlocking with said anchor and the other end of said brake shoe abutting and interlocking with said shoe clearance adjustment device respectively;
a service brake actuator mounted on said back plate;
a link pivotably supported at a pivot point at the central region of said brake shoe, one end of said link being connected so as to be activated by said service brake actuator itself activated when a service brake is applied, while the other end of said link being supported by a supporting member, wherein the force of the service brake actuator transferred to the link is transferred to said brake shoe through the pivot component.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/825,058Filed 27 Mar 1997
Priority: JP 8-1085354 Apr 1996
Granted: 13 Oct 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F16D 51/16
Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like: shaped as brake-shoes pivoted on a fixed…
F16D 65/563
For mounting within the confines of a drum brake: arranged adjacent to service brake actuator, e.g. on parking brake lever, and not subjected to…
F16D 2051/008
Parts or details of drum brakes: brakes with only one substantially rigid braking member
F16D 2125/60
Transmitting linear movement: cables or chains, e.g. Bowden cables