Slack adjusters for the shoes of vehicle shoe drum brakes of the

Details Slack adjusters for the shoes of vehicle shoe drum brakes of the Slack adjusters for the shoes of vehicle shoe drum brakes of the

1976-09-15

1977-11-01

Kunin, Stephen G.

Brakes

Position adjusters

Slack

188 795P, F16D 6556

Patent

active

040561755

ABSTRACT:
An automatic slack adjuster assembly is provided in or for a vehicle internal shoe drum brake of the duo-servo type having primary and secondary shoes located within a rotatable drum so that the primary shoe is carried round with the drum when the brake is applied, the slack adjuster assembly being located in a housing between adjacent ends of the shoes and including a thrust member which engages the ends of the shoes and transmits thrust on the primary shoe to the secondary shoe when the brake is applied. The adjuster assembly includes a sensing mechanism which senses relative movement between the thrust member and the housing and controls an energy-storing clutch mechanism which is connected to an adjuster and operates the adjuster to increase the effective length of the thrust member when the torque generated by the stored energy force is greater than the torque generated by the force applied to the thrust member from the shoe ends.

REFERENCES:
patent: 2255260 (1941-09-01), Loweke
patent: 3805926 (1974-04-01), Clay et al.
patent: 3838757 (1974-10-01), Farr

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