| 摘要 |
<p>1,169,306. Self-adjusting internal shoe drum brakes. BENDIX CORP. 24 June, 1968 [28 July, 1967], No. 29952/68. Heading F2E. In a self servo internal shoe drum brake having an automatic adjuster comprising a screw and nut extendable strut 36 between adjacent ends of a pair of brake shoes 12, 14 and a pawl lever 42 which co-operatea with a serrated wheel 40 on the screw threaded portion 39 of the strut so that whenever shoe movement upon a brake application with the vehicle moving backwards exceeds a given amount the wheel 40 is rotated to extend the strut 36, the pawl lever 42 is pivoted by a notched lug 48 engaging a slot 52 in one of the brake shoes to allow movement of the pawl lever 42 in the direction of the axis of strut 36 if an excessive torque is applied to the lever and a flange 46 on the lever 42 co-operates with the strut 36 to define a retracted position for the lever 42.</p> |
