초록 ▼

An automatic adjuster which readily permits manual adjustment of a drum brake by manually rotating an adjuster screw only. For normal automatic adjustment, an adjuster nut makes outward screwing rotation with the adjuster screw not allowed to rotate when the extent of forward movement of the adjuste

An automatic adjuster which readily permits manual adjustment of a drum brake by manually rotating an adjuster screw only. For normal automatic adjustment, an adjuster nut makes outward screwing rotation with the adjuster screw not allowed to rotate when the extent of forward movement of the adjuster nut comes to exceed a predetermined value during brake application. Manual adjustment is performed by rotating the adjuster screw to screw it outward or inward while the adjuster nut is not allowed to rotate.

대표청구항 ▼

An automatic/manual adjuster for a drum brake comprising: a body; a piston which is disposed within said body and is slidably arranged to push a brake shoe against a drum; an adjuster nut which is rotatable within said piston and is arranged to be movable together with said piston, said adjuster nut

An automatic/manual adjuster for a drum brake comprising: a body; a piston which is disposed within said body and is slidably arranged to push a brake shoe against a drum; an adjuster nut which is rotatable within said piston and is arranged to be movable together with said piston, said adjuster nut being provided with teeth which are formed on the outer circumferential part of the adjuster nut; an adjuster screw which is screwed to said adjuster nut and has one end thereof engaged with said brake shoe; a lever having a middle part which is pivotally connected to said body; a spring means arranged to engage said teeth with a first claw part provided at one end of the lever; and a second claw part arranged at the other end of said lever to come to engage with said teeth when said first claw part is disengaged from said teeth by a swaying movement of said lever.