Robert Boschgmbh

Robert Bosch Technology Corporation

Kent Allen Woodiwiss

William Eugene Sherman, Ii

James E Doolittle

Ronald Joseph Ackerman

Charles D Goldstein

Leon A Bogucki

A linkage for connecting a brake cable to an actuator lever in a drum-in-hat park brake assembly. The linkage is defined by a continuous wire that is shaped into a base with parallel and adjacent first and second legs located in a first plane perpendicular to the base and parallel and adjacent third and fourth legs located in a second plane perpendicular to the base. The first and second legs each have a first section that extend a first distance from the base to a first loop and a second section that extend a second distance from the first loop to a second loop while the third and fourth legs extend a third distance from the base. The base has an opening defined by a complementary shape created between the first leg and the third leg and the second leg and the fourth leg. The base receives a head member on a cable after the head is passed through the first loop and a force is applied to the cable to expand the first section of the first and second legs to allow the cable to be located in the opening in the base. Actuation forces are applied to a brake lever and transmitted to move the actuator lever that in turn moves first and second brake shoes into engagement with a drum to effect a brake application.

Linkage for joining a lever to a brake cable

An adjuster mechanism in a drum brake wherein a rotation of a star wheel on a shaft of an extendable strut is limited to a single increment define the pitch of a plurality of teeth on the star wheel. The limitation is achieved by a lever that is carried by a web of a brake shoe has a first blade that in perpendicular alignment with a first tooth of the plurality of teeth while a second blade is offset from a second tooth and located in a plane that is substantially parallel with the pitch. When the lever is pivoted on the web through a predetermined angle, the first blade slides into engagement with a third tooth while the second blade moves through the offset and into engagement with the second tooth to connect the lever with the star wheel. Any further pivoting of the lever by movement of the web toward the drum results in the lever and star wheel moving together. When a brake application terminated, a return spring acts on the lever to bring the first blade into engagement the third tooth while the second blade is moved to the offset position and the star wheel is rotated an increment defined by the pitch of the plurality of teeth such that a running clearance is sustained for the drum brake.

Adjuster mechanism for a drum brake

Parking brake lever

Growing community of inventors

Goshen, IN, United States of America

Kent Allen Woodiwiss