| 摘要 |
In a cam actuated brake, an adjustable cam disposable intermediate a pair of following surfaces on first ends of a pair of arms. The arms being rotatable about parallel axes and having a pair of opposing brake surfaces at second ends. The cam comprises a body having a first and second opposite cam surfaces adapted to engage the following surfaces and a bore intermediate the cam surfaces and a piston receivable in the bore. The piston is releasably coupled to the bore. The cam further comprises an adjuster for varying the position of the piston in the bore. The piston may be engaged by an actuator so as to wedge the cam between the following surfaces of the arms so as to rotate the first and second arms about their respective axes thereby frictionally engaging an object between the braking surfaces.
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